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uv-k5-firmware-custom/driver/bk4819.c

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/* Copyright 2023 Dual Tachyon
* https://github.com/DualTachyon
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "bk4819.h"
#include "bsp/dp32g030/gpio.h"
#include "bsp/dp32g030/portcon.h"
#include "functions.h"
#include "driver/gpio.h"
#include "driver/system.h"
#include "driver/systick.h"
#if defined(ENABLE_UART) && defined(ENABLE_UART_DEBUG)
#include "driver/uart.h"
#endif
#include "misc.h"
#ifdef ENABLE_MDC1200
#include "mdc1200.h"
#endif
#ifndef ARRAY_SIZE
#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
#endif
static uint16_t gBK4819_GpioOutState;
BK4819_filter_bandwidth_t m_bandwidth = BK4819_FILTER_BW_NARROW;
bool g_rx_idle_mode;
__inline uint16_t scale_freq(const uint16_t freq)
{
// return (((uint32_t)freq * 1032444u) + 50000u) / 100000u; // with rounding
return (((uint32_t)freq * 1353245u) + (1u << 16)) >> 17; // with rounding
}
void BK4819_Init(void)
{
GPIO_SetBit(&GPIOC->DATA, GPIOC_PIN_BK4819_SCN);
GPIO_SetBit(&GPIOC->DATA, GPIOC_PIN_BK4819_SCL);
GPIO_SetBit(&GPIOC->DATA, GPIOC_PIN_BK4819_SDA);
// reset the chip
BK4819_WriteRegister(0x00, (1u << 15));
BK4819_WriteRegister(0x00, 0);
BK4819_WriteRegister(0x37, 0x1D0F);
BK4819_WriteRegister(0x36, 0x0022);
#ifdef ENABLE_AM_FIX
BK4819_DisableAGC();
#else
BK4819_EnableAGC(); // only do this in linear modulation modes, not FM
#endif
// BK4819_WriteRegister(0x19, 0x1041); // 0001 0000 0100 0001 <15> MIC AGC 1 = disable 0 = enable
// BK4819_WriteRegister(0x7D, 0xE940); // 111010010100 0000
BK4819_WriteRegister(0x7D, 0xE940 | 0x1f);
BK4819_WriteRegister(0x19, 0x1041); // 0001 0000 0100 0001 <15> MIC AGC 1 = disable 0 = enable
// REG_48 .. RX AF level
//
// <15:12> 11 ??? 0 to 15
//
// <11:10> 0 AF Rx Gain-1
// 0 = 0dB
// 1 = -6dB
// 2 = -12dB
// 3 = -18dB
//
// <9:4> 60 AF Rx Gain-2 -26dB ~ 5.5dB 0.5dB/step
// 63 = max
// 0 = mute
//
// <3:0> 15 AF DAC Gain (after Gain-1 and Gain-2) approx 2dB/step
// 15 = max
// 0 = min
//
BK4819_WriteRegister(0x48, // 0xB3A8); // 1011 00 111010 1000
(11u << 12) | // ??? 0..15
( 0u << 10) | // AF Rx Gain-1
(58u << 4) | // AF Rx Gain-2
( 8u << 0)); // AF DAC Gain (after Gain-1 and Gain-2)
BK4819_config_sub_audible();
#if 1
const uint8_t dtmf_coeffs[] = {111, 107, 103, 98, 80, 71, 58, 44, 65, 55, 37, 23, 228, 203, 181, 159};
for (unsigned int i = 0; i < ARRAY_SIZE(dtmf_coeffs); i++)
BK4819_WriteRegister(0x09, (i << 12) | dtmf_coeffs[i]);
#else
// original code
BK4819_WriteRegister(0x09, 0x006F); // 6F
BK4819_WriteRegister(0x09, 0x106B); // 6B
BK4819_WriteRegister(0x09, 0x2067); // 67
BK4819_WriteRegister(0x09, 0x3062); // 62
BK4819_WriteRegister(0x09, 0x4050); // 50
BK4819_WriteRegister(0x09, 0x5047); // 47
BK4819_WriteRegister(0x09, 0x603A); // 3A
BK4819_WriteRegister(0x09, 0x702C); // 2C
BK4819_WriteRegister(0x09, 0x8041); // 41
BK4819_WriteRegister(0x09, 0x9037); // 37
BK4819_WriteRegister(0x09, 0xA025); // 25
BK4819_WriteRegister(0x09, 0xB017); // 17
BK4819_WriteRegister(0x09, 0xC0E4); // E4
BK4819_WriteRegister(0x09, 0xD0CB); // CB
BK4819_WriteRegister(0x09, 0xE0B5); // B5
BK4819_WriteRegister(0x09, 0xF09F); // 9F
#endif
BK4819_WriteRegister(0x1F, 0x5454);
BK4819_WriteRegister(0x3E, 0xA037);
gBK4819_GpioOutState = 0x9000;
BK4819_WriteRegister(0x33, 0x9000);
BK4819_WriteRegister(0x3F, 0);
#if 0
// rt-890
// BK4819_WriteRegister(0x37, 0x1D0F);
// DisableAGC(0);
BK4819_WriteRegister(0x13, 0x03BE);
BK4819_WriteRegister(0x12, 0x037B);
BK4819_WriteRegister(0x11, 0x027B);
BK4819_WriteRegister(0x10, 0x007A);
BK4819_WriteRegister(0x14, 0x0019);
BK4819_WriteRegister(0x49, 0x2A38);
BK4819_WriteRegister(0x7B, 0x8420);
BK4819_WriteRegister(0x33, 0x1F00);
BK4819_WriteRegister(0x35, 0x0000);
BK4819_WriteRegister(0x1E, 0x4C58);
BK4819_WriteRegister(0x1F, 0xA656);
// BK4819_WriteRegister(0x3E, gCalibration.BandSelectionThreshold);
BK4819_WriteRegister(0x3F, 0x0000);
BK4819_WriteRegister(0x2A, 0x4F18);
BK4819_WriteRegister(0x53, 0xE678);
BK4819_WriteRegister(0x2C, 0x5705);
BK4819_WriteRegister(0x4B, 0x7102);
BK4819_WriteRegister(0x77, 0x88EF);
BK4819_WriteRegister(0x26, 0x13A0);
#endif
}
static uint16_t BK4819_ReadU16(void)
{
unsigned int i;
uint16_t Value;
PORTCON_PORTC_IE = (PORTCON_PORTC_IE & ~PORTCON_PORTC_IE_C2_MASK) | PORTCON_PORTC_IE_C2_BITS_ENABLE;
GPIOC->DIR = (GPIOC->DIR & ~GPIO_DIR_2_MASK) | GPIO_DIR_2_BITS_INPUT;
SYSTICK_DelayUs(1);
Value = 0;
for (i = 0; i < 16; i++)
{
Value <<= 1;
Value |= GPIO_CheckBit(&GPIOC->DATA, GPIOC_PIN_BK4819_SDA);
GPIO_SetBit(&GPIOC->DATA, GPIOC_PIN_BK4819_SCL);
SYSTICK_DelayUs(1);
GPIO_ClearBit(&GPIOC->DATA, GPIOC_PIN_BK4819_SCL);
SYSTICK_DelayUs(1);
}
PORTCON_PORTC_IE = (PORTCON_PORTC_IE & ~PORTCON_PORTC_IE_C2_MASK) | PORTCON_PORTC_IE_C2_BITS_DISABLE;
GPIOC->DIR = (GPIOC->DIR & ~GPIO_DIR_2_MASK) | GPIO_DIR_2_BITS_OUTPUT;
return Value;
}
uint16_t BK4819_ReadRegister(const uint8_t Register)
{
uint16_t Value;
GPIO_SetBit(&GPIOC->DATA, GPIOC_PIN_BK4819_SCN);
GPIO_ClearBit(&GPIOC->DATA, GPIOC_PIN_BK4819_SCL);
SYSTICK_DelayUs(1);
GPIO_ClearBit(&GPIOC->DATA, GPIOC_PIN_BK4819_SCN);
BK4819_WriteU8(Register | 0x80);
Value = BK4819_ReadU16();
GPIO_SetBit(&GPIOC->DATA, GPIOC_PIN_BK4819_SCN);
SYSTICK_DelayUs(1);
GPIO_SetBit(&GPIOC->DATA, GPIOC_PIN_BK4819_SCL);
GPIO_SetBit(&GPIOC->DATA, GPIOC_PIN_BK4819_SDA);
return Value;
}
void BK4819_WriteRegister(const uint8_t Register, uint16_t Data)
{
GPIO_SetBit(&GPIOC->DATA, GPIOC_PIN_BK4819_SCN);
GPIO_ClearBit(&GPIOC->DATA, GPIOC_PIN_BK4819_SCL);
SYSTICK_DelayUs(1);
GPIO_ClearBit(&GPIOC->DATA, GPIOC_PIN_BK4819_SCN);
BK4819_WriteU8(Register);
BK4819_WriteU16(Data);
GPIO_SetBit(&GPIOC->DATA, GPIOC_PIN_BK4819_SCN);
SYSTICK_DelayUs(1);
GPIO_SetBit(&GPIOC->DATA, GPIOC_PIN_BK4819_SCL);
GPIO_SetBit(&GPIOC->DATA, GPIOC_PIN_BK4819_SDA);
}
void BK4819_WriteU8(uint8_t Data)
{
unsigned int i;
GPIO_ClearBit(&GPIOC->DATA, GPIOC_PIN_BK4819_SCL);
for (i = 0; i < 8; i++)
{
if ((Data & 0x80) == 0)
GPIO_ClearBit(&GPIOC->DATA, GPIOC_PIN_BK4819_SDA);
else
GPIO_SetBit(&GPIOC->DATA, GPIOC_PIN_BK4819_SDA);
SYSTICK_DelayUs(1);
GPIO_SetBit(&GPIOC->DATA, GPIOC_PIN_BK4819_SCL);
SYSTICK_DelayUs(1);
Data <<= 1;
GPIO_ClearBit(&GPIOC->DATA, GPIOC_PIN_BK4819_SCL);
SYSTICK_DelayUs(1);
}
}
void BK4819_WriteU16(uint16_t Data)
{
unsigned int i;
GPIO_ClearBit(&GPIOC->DATA, GPIOC_PIN_BK4819_SCL);
for (i = 0; i < 16; i++)
{
if ((Data & 0x8000) == 0)
GPIO_ClearBit(&GPIOC->DATA, GPIOC_PIN_BK4819_SDA);
else
GPIO_SetBit(&GPIOC->DATA, GPIOC_PIN_BK4819_SDA);
SYSTICK_DelayUs(1);
GPIO_SetBit(&GPIOC->DATA, GPIOC_PIN_BK4819_SCL);
Data <<= 1;
SYSTICK_DelayUs(1);
GPIO_ClearBit(&GPIOC->DATA, GPIOC_PIN_BK4819_SCL);
SYSTICK_DelayUs(1);
}
}
void BK4819_DisableAGC(void)
{
// REG_7E
//
// <15> 0 AGC Fix Mode.
// 1=Fix; 0=Auto.
//
// <14:12> 0b011 AGC Fix Index.
// 011=Max, then 010,001,000,111,110,101,100(min).
//
// <5:3> 0b101 DC Filter Band Width for Tx (MIC In).
// 000=Bypass DC filter;
//
// <2:0> 0b110 DC Filter Band Width for Rx (IF In).
// 000=Bypass DC filter;
//
BK4819_WriteRegister(0x7E, // 0x302E 0 011 000000 101 110
// (1u << 15) | // 0 AGC fix mode
(0u << 15) | // 0 AGC fix mode
(3u << 12) | // 3 AGC fix index
(5u << 3) | // 5 DC Filter band width for Tx (MIC In)
(6u << 0)); // 6 DC Filter band width for Rx (I.F In)
// REG_10
//
// 0x0038 Rx AGC Gain Table[0]. (Index Max->Min is 3,2,1,0,-1)
//
// <15:10> ???
//
// <9:8> LNA Gain Short
// 3 = 0dB <<<
// 2 = -24dB // was -11
// 1 = -30dB // was -16
// 0 = -33dB // was -19
//
// <7:5> LNA Gain
// 7 = 0dB
// 6 = -2dB
// 5 = -4dB <<<
// 4 = -6dB
// 3 = -9dB
// 2 = -14dB
// 1 = -19dB
// 0 = -24dB
//
// <4:3> MIXER Gain
// 3 = 0dB <<<
// 2 = -3dB
// 1 = -6dB
// 0 = -8dB
//
// <2:0> PGA Gain
// 7 = 0dB
// 6 = -3dB <<<
// 5 = -6dB
// 4 = -9dB
// 3 = -15dB
// 2 = -21dB
// 1 = -27dB
// 0 = -33dB
//
BK4819_WriteRegister(0x13, (3u << 8) | (5u << 5) | (3u << 3) | (6u << 0)); // 000000 11 101 11 110
BK4819_WriteRegister(0x12, 0x037B); // 000000 11 011 11 011
BK4819_WriteRegister(0x11, 0x027B); // 000000 10 011 11 011
BK4819_WriteRegister(0x10, 0x007A); // 000000 00 011 11 010
BK4819_WriteRegister(0x14, 0x0019); // 000000 00 000 11 001
// ???
BK4819_WriteRegister(0x49, 0x2A38);
BK4819_WriteRegister(0x7B, 0x8420);
}
void BK4819_EnableAGC(void)
{
// TODO: See if this attenuates overloading
// signals as well as boosting weak ones
//
// REG_7E
//
// <15> 0 AGC Fix Mode.
// 1=Fix; 0=Auto.
//
// <14:12> 0b011 AGC Fix Index.
// 011=Max, then 010,001,000,111,110,101,100(min).
//
// <5:3> 0b101 DC Filter Band Width for Tx (MIC In).
// 000=Bypass DC filter;
//
// <2:0> 0b110 DC Filter Band Width for Rx (IF In).
// 000=Bypass DC filter;
BK4819_WriteRegister(0x7E,
(0u << 15) | // 0 AGC fix mode
(3u << 12) | // 3 AGC fix index
(5u << 3) | // 5 DC Filter band width for Tx (MIC In)
(6u << 0)); // 6 DC Filter band width for Rx (I.F In)
// TBR: fagci has this listed as two values, agc_rssi and lna_peak_rssi
// This is why AGC appeared to do nothing as-is for Rx
//
// REG_62
//
// <15:8> 0xFF AGC RSSI
//
// <7:0> 0xFF LNA Peak RSSI
//
// TBR: Using S9+30 (173) and S9 (143) as suggested values
BK4819_WriteRegister(0x62, (173u << 8) | (143u << 0));
// AGC auto-adjusts the following LNA values, no need to set them ourselves
//BK4819_WriteRegister(0x13, (3u << 8) | (5u << 5) | (3u << 3) | (6u << 0)); // 000000 11 101 11 110
//BK4819_WriteRegister(0x12, 0x037B); // 000000 11 011 11 011
//BK4819_WriteRegister(0x11, 0x027B); // 000000 10 011 11 011
//BK4819_WriteRegister(0x10, 0x007A); // 000000 00 011 11 010
//BK4819_WriteRegister(0x14, 0x0019); // 000000 00 000 11 001
BK4819_WriteRegister(0x49, 0x2A38);
BK4819_WriteRegister(0x7B, 0x8420);
for (unsigned int i = 0; i < 8; i++)
BK4819_WriteRegister(0x06, ((i & 7u) << 13) | (0x4A << 7) | (0x36 << 0));
}
void BK4819_set_GPIO_pin(bk4819_gpio_pin_t Pin, bool bSet)
{
if (bSet)
gBK4819_GpioOutState |= (0x40u >> Pin);
else
gBK4819_GpioOutState &= ~(0x40u >> Pin);
BK4819_WriteRegister(0x33, gBK4819_GpioOutState);
}
void BK4819_EnableVox(uint16_t VoxEnableThreshold, uint16_t VoxDisableThreshold)
{
//VOX Algorithm
//if (voxamp>VoxEnableThreshold) VOX = 1;
//else
//if (voxamp<VoxDisableThreshold) (After Delay) VOX = 0;
const uint16_t REG_31_Value = BK4819_ReadRegister(0x31);
// 0xA000 is undocumented?
BK4819_WriteRegister(0x46, 0xA000 | (VoxEnableThreshold & 0x07FF));
// 0x1800 is undocumented?
BK4819_WriteRegister(0x79, 0x1800 | (VoxDisableThreshold & 0x07FF));
// Bottom 12 bits are undocumented, 15:12 vox disable delay *128ms
BK4819_WriteRegister(0x7A, 0x289A); // vox disable delay = 128*5 = 640ms
// Enable VOX
BK4819_WriteRegister(0x31, REG_31_Value | (1u << 2)); // VOX Enable
}
void BK4819_set_TX_deviation(const bool narrow)
{
const uint8_t scrambler = (BK4819_ReadRegister(0x31) >> 1) & 1u;
uint16_t deviation = narrow ? 900 : 1232; // 0 ~ 4095
if (scrambler)
deviation -= 200;
BK4819_WriteRegister(0x40, (3u << 12) | deviation);
}
void BK4819_SetFilterBandwidth(const BK4819_filter_bandwidth_t Bandwidth, const bool weak_no_different)
{
// REG_43
// <15> 0 ???
//
// <14:12> 4 RF filter bandwidth
// 0 = 1.7 kHz
// 1 = 2.0 kHz
// 2 = 2.5 kHz
// 3 = 3.0 kHz
// 4 = 3.75 kHz
// 5 = 4.0 kHz
// 6 = 4.25 kHz
// 7 = 4.5 kHz
// if <5> == 1, RF filter bandwidth * 2
//
// <11:9> 0 RF filter bandwidth when signal is weak
// 0 = 1.7 kHz
// 1 = 2.0 kHz
// 2 = 2.5 kHz
// 3 = 3.0 kHz
// 4 = 3.75 kHz
// 5 = 4.0 kHz
// 6 = 4.25 kHz
// 7 = 4.5 kHz
// if <5> == 1, RF filter bandwidth * 2
//
// <8:6> 1 AFTxLPF2 filter Band Width
// 1 = 2.5 kHz (for 12.5k channel space)
// 2 = 2.75 kHz
// 0 = 3.0 kHz (for 25k channel space)
// 3 = 3.5 kHz
// 4 = 4.5 kHz
// 5 = 4.25 kHz
// 6 = 4.0 kHz
// 7 = 3.75 kHz
//
// <5:4> 0 BW Mode Selection
// 0 = 12.5k
// 1 = 6.25k
// 2 = 25k/20k
//
// <3> 1 ???
//
// <2> 0 Gain after FM Demodulation
// 0 = 0dB
// 1 = 6dB
//
// <1:0> 0 ???
uint16_t val;
m_bandwidth = Bandwidth;
switch (Bandwidth)
{
default:
case BK4819_FILTER_BW_WIDE: // 25kHz
if (weak_no_different)
{ // make the RX bandwidth the same with weak signals
val =
(0u << 15) | // 0
(4u << 12) | // *3 RF filter bandwidth
(4u << 9) | // *0 RF filter bandwidth when signal is weak
(6u << 6) | // *0 AFTxLPF2 filter Band Width
(2u << 4) | // 2 BW Mode Selection
(1u << 3) | // 1
(0u << 2) | // 0 Gain after FM Demodulation
(0u << 0); // 0
}
else
{ // with weak RX signals the RX bandwidth is reduced
val = // 0x3028); // 0 011 000 000 10 1 0 00
(0u << 15) | // 0
(4u << 12) | // *3 RF filter bandwidth
(2u << 9) | // *0 RF filter bandwidth when signal is weak
(6u << 6) | // *0 AFTxLPF2 filter Band Width
(2u << 4) | // 2 BW Mode Selection
(1u << 3) | // 1
(0u << 2) | // 0 Gain after FM Demodulation
(0u << 0); // 0
}
break;
case BK4819_FILTER_BW_NARROW: // 12.5kHz
if (weak_no_different)
{
val =
(0u << 15) | // 0
(4u << 12) | // *4 RF filter bandwidth
(4u << 9) | // *0 RF filter bandwidth when signal is weak
(0u << 6) | // *1 AFTxLPF2 filter Band Width
(0u << 4) | // 0 BW Mode Selection
(1u << 3) | // 1
(0u << 2) | // 0 Gain after FM Demodulation
(0u << 0); // 0
}
else
{
val = // 0x4048); // 0 100 000 001 00 1 0 00
(0u << 15) | // 0
(4u << 12) | // *4 RF filter bandwidth
(2u << 9) | // *0 RF filter bandwidth when signal is weak
(0u << 6) | // *1 AFTxLPF2 filter Band Width
(0u << 4) | // 0 BW Mode Selection
(1u << 3) | // 1
(0u << 2) | // 0 Gain after FM Demodulation
(0u << 0); // 0
}
break;
case BK4819_FILTER_BW_NARROWER: // 6.25kHz
if (weak_no_different)
{
val =
(0u << 15) | // 0
(3u << 12) | // 3 RF filter bandwidth
(3u << 9) | // *0 RF filter bandwidth when signal is weak
(1u << 6) | // 1 AFTxLPF2 filter Band Width
(1u << 4) | // 1 BW Mode Selection
(1u << 3) | // 1
(0u << 2) | // 0 Gain after FM Demodulation
(0u << 0); // 0
}
else
{
val =
(0u << 15) | // 0
(3u << 12) | // 3 RF filter bandwidth
(0u << 9) | // 0 RF filter bandwidth when signal is weak
(1u << 6) | // 1 AFTxLPF2 filter Band Width
(1u << 4) | // 1 BW Mode Selection
(1u << 3) | // 1
(0u << 2) | // 1 Gain after FM Demodulation
(0u << 0); // 0
}
break;
}
BK4819_WriteRegister(0x43, val);
}
void BK4819_SetupPowerAmplifier(const uint8_t bias, const uint32_t frequency)
{
// REG_36 <15:8> 0 PA Bias output 0 ~ 3.2V
// 255 = 3.2V
// 0 = 0V
//
// REG_36 <7> 0
// 1 = Enable PA-CTL output
// 0 = Disable (Output 0 V)
//
// REG_36 <5:3> 7 PA gain 1 tuning
// 7 = max
// 0 = min
//
// REG_36 <2:0> 7 PA gain 2 tuning
// 7 = max
// 0 = min
//
// 280MHz gain 1 = 1 gain 2 = 0 gain 1 = 4 gain 2 = 2
const uint8_t gain = (frequency == 0) ? 0 : (frequency < 28000000) ? (1u << 3) | (0u << 0) : (4u << 3) | (2u << 0);
const uint8_t enable = 1;
BK4819_WriteRegister(0x36, ((uint16_t)bias << 8) | ((uint16_t)enable << 7) | ((uint16_t)gain << 0));
}
void BK4819_set_rf_frequency(const uint32_t frequency, const bool trigger_update)
{
BK4819_WriteRegister(0x38, (frequency >> 0) & 0xFFFF);
BK4819_WriteRegister(0x39, (frequency >> 16) & 0xFFFF);
if (trigger_update)
{ // trigger a PLL/VCO update
const uint16_t reg = BK4819_ReadRegister(0x30);
BK4819_WriteRegister(0x30, reg & ~BK4819_REG_30_ENABLE_VCO_CALIB);
BK4819_WriteRegister(0x30, reg);
}
}
void BK4819_SetupSquelch(
uint8_t squelch_open_rssi_thresh,
uint8_t squelch_close_rssi_thresh,
uint8_t squelch_open_noise_thresh,
uint8_t squelch_close_noise_thresh,
uint8_t squelch_close_glitch_thresh,
uint8_t squelch_open_glitch_thresh)
{
// REG_70
//
// <15> 0 Enable TONE1
// 1 = Enable
// 0 = Disable
//
// <14:8> 0 TONE1 tuning
// 0 ~ 127
//
// <7> 0 Enable TONE2
// 1 = Enable
// 0 = Disable
//
// <6:0> 0 TONE2/FSK tuning
// 0 ~ 127
//
BK4819_WriteRegister(0x70, 0);
// Glitch threshold for Squelch = close
//
// 0 ~ 255
//
BK4819_WriteRegister(0x4D, 0xA000 | squelch_close_glitch_thresh);
// REG_4E
//
// <15:14> 1 ???
//
// <13:11> 5 Squelch = open Delay Setting
// 0 ~ 7
//
// <10:9> 7 Squelch = close Delay Setting
// 0 ~ 3
//
// <8> 0 ???
//
// <7:0> 8 Glitch threshold for Squelch = open
// 0 ~ 255
//
BK4819_WriteRegister(0x4E, // 01 101 11 1 00000000
// #ifndef ENABLE_FASTER_CHANNEL_SCAN
// original (*)
(1u << 14) | // 1 ???
(5u << 11) | // 5 squelch = open delay .. 0 ~ 7
(6u << 9) | // *3 squelch = close delay .. 0 ~ 3
squelch_open_glitch_thresh); // 0 ~ 255
// #else
// faster (but twitchier)
// (1u << 14) | // 1 ???
// (2u << 11) | // *5 squelch = open delay .. 0 ~ 7
// (1u << 9) | // *3 squelch = close delay .. 0 ~ 3
// squelch_open_glitch_thresh); // 0 ~ 255
// #endif
// REG_4F
//
// <14:8> 47 Ex-noise threshold for Squelch = close
// 0 ~ 127
//
// <7> ???
//
// <6:0> 46 Ex-noise threshold for Squelch = open
// 0 ~ 127
//
BK4819_WriteRegister(0x4F, ((uint16_t)squelch_close_noise_thresh << 8) | squelch_open_noise_thresh);
// REG_78
//
// <15:8> 72 RSSI threshold for Squelch = open 0.5dB/step
//
// <7:0> 70 RSSI threshold for Squelch = close 0.5dB/step
//
BK4819_WriteRegister(0x78, ((uint16_t)squelch_open_rssi_thresh << 8) | squelch_close_rssi_thresh);
BK4819_SetAF(BK4819_AF_MUTE);
BK4819_RX_TurnOn();
}
void BK4819_SetAF(BK4819_af_type_t AF)
{
BK4819_WriteRegister(0x47, 0);
// BK4819_WriteRegister(0x47, 0x6040 | (AF << 8)); // 0110 0000 0100 0000
BK4819_WriteRegister(0x47, (1u << 14) | (1u << 13) | ((AF & 15u) << 8) | (1u << 6));
}
void BK4819_RX_TurnOn(void)
{
// DSP Voltage Setting = 1
// ANA LDO = 2.7v
// VCO LDO = 2.7v
// RF LDO = 2.7v
// PLL LDO = 2.7v
// ANA LDO bypass
// VCO LDO bypass
// RF LDO bypass
// PLL LDO bypass
// Reserved bit is 1 instead of 0
// Enable DSP
// Enable XTAL
// Enable Band Gap
//
BK4819_WriteRegister(0x37, 0x1F0F); // 0001 1111 0000 1111
BK4819_WriteRegister(0x30, 0);
BK4819_WriteRegister(0x30,
BK4819_REG_30_ENABLE_VCO_CALIB |
// BK4819_REG_30_ENABLE_UNKNOWN |
BK4819_REG_30_ENABLE_RX_LINK |
BK4819_REG_30_ENABLE_AF_DAC |
BK4819_REG_30_ENABLE_DISC_MODE |
BK4819_REG_30_ENABLE_PLL_VCO |
// BK4819_REG_30_ENABLE_PA_GAIN |
// BK4819_REG_30_ENABLE_MIC_ADC |
// BK4819_REG_30_ENABLE_TX_DSP |
BK4819_REG_30_ENABLE_RX_DSP |
0);
}
void BK4819_set_rf_filter_path(uint32_t Frequency)
{
if (Frequency < 28000000)
{ // VHF
BK4819_set_GPIO_pin(BK4819_GPIO4_PIN32_VHF_LNA, true);
BK4819_set_GPIO_pin(BK4819_GPIO3_PIN31_UHF_LNA, false);
}
else
if (Frequency == 0xFFFFFFFF)
{ // OFF
BK4819_set_GPIO_pin(BK4819_GPIO4_PIN32_VHF_LNA, false);
BK4819_set_GPIO_pin(BK4819_GPIO3_PIN31_UHF_LNA, false);
}
else
{ // UHF
BK4819_set_GPIO_pin(BK4819_GPIO4_PIN32_VHF_LNA, false);
BK4819_set_GPIO_pin(BK4819_GPIO3_PIN31_UHF_LNA, true);
}
}
void BK4819_DisableScramble(void)
{
const uint16_t Value = BK4819_ReadRegister(0x31);
BK4819_WriteRegister(0x31, Value & ~(1u << 1));
}
void BK4819_EnableScramble(uint8_t Type)
{
const uint16_t Value = BK4819_ReadRegister(0x31);
BK4819_WriteRegister(0x31, Value | (1u << 1));
BK4819_WriteRegister(0x71, 0x68DC + (Type * 1032)); // 0110 1000 1101 1100
}
bool BK4819_CompanderEnabled(void)
{
return (BK4819_ReadRegister(0x31) & (1u << 3)) ? true : false;
}
void BK4819_SetCompander(const unsigned int mode)
{
// mode 0 .. OFF
// mode 1 .. TX
// mode 2 .. RX
// mode 3 .. TX and RX
const uint16_t r31 = BK4819_ReadRegister(0x31);
if (mode == 0)
{ // disable
BK4819_WriteRegister(0x31, r31 & ~(1u << 3));
return;
}
// REG_29
//
// <15:14> 10 Compress (AF Tx) Ratio
// 00 = Disable
// 01 = 1.333:1
// 10 = 2:1
// 11 = 4:1
//
// <13:7> 86 Compress (AF Tx) 0 dB point (dB)
//
// <6:0> 64 Compress (AF Tx) noise point (dB)
//
const uint16_t compress_ratio = (mode == 1 || mode >= 3) ? 2 : 0; // 2:1
BK4819_WriteRegister(0x29, // (BK4819_ReadRegister(0x29) & ~(3u << 14)) | (compress_ratio << 14));
(compress_ratio << 14) |
(86u << 7) | // compress 0dB
(64u << 0)); // compress noise dB
// REG_28
//
// <15:14> 01 Expander (AF Rx) Ratio
// 00 = Disable
// 01 = 1:2
// 10 = 1:3
// 11 = 1:4
//
// <13:7> 86 Expander (AF Rx) 0 dB point (dB)
//
// <6:0> 56 Expander (AF Rx) noise point (dB)
//
const uint16_t expand_ratio = (mode >= 2) ? 1 : 0; // 1:2
BK4819_WriteRegister(0x28, // (BK4819_ReadRegister(0x28) & ~(3u << 14)) | (expand_ratio << 14));
(expand_ratio << 14) |
(86u << 7) | // expander 0dB
(56u << 0)); // expander noise dB
// enable
BK4819_WriteRegister(0x31, r31 | (1u << 3));
}
void BK4819_DisableVox(void)
{
const uint16_t Value = BK4819_ReadRegister(0x31);
BK4819_WriteRegister(0x31, Value & 0xFFFB);
}
void BK4819_DisableDTMF(void)
{
BK4819_WriteRegister(0x24, 0);
}
void BK4819_EnableDTMF(void)
{
// no idea what this does
BK4819_WriteRegister(0x21, 0x06D8); // 0000 0110 1101 1000
// REG_24
//
// <15> 1 ???
//
// <14:7> 24 Threshold
//
// <6> 1 ???
//
// <5> 0 DTMF/SelCall enable
// 1 = Enable
// 0 = Disable
//
// <4> 1 DTMF or SelCall detection mode
// 1 = for DTMF
// 0 = for SelCall
//
// <3:0> 14 Max symbol number for SelCall detection
//
// const uint16_t threshold = 24; // default, but doesn't decode non-QS radios
const uint16_t threshold = 130; // but 128 ~ 247 does
// const uint16_t threshold = 8; // 0 ~ 63 ? .. doesn't work with A and B's :(
BK4819_WriteRegister(0x24, // 1 00011000 1 1 1 1110
(1u << BK4819_REG_24_SHIFT_UNKNOWN_15) |
(threshold << BK4819_REG_24_SHIFT_THRESHOLD) | // 0 ~ 255
(1u << BK4819_REG_24_SHIFT_UNKNOWN_6) |
BK4819_REG_24_ENABLE |
BK4819_REG_24_SELECT_DTMF |
(15u << BK4819_REG_24_SHIFT_MAX_SYMBOLS)); // 0 ~ 15
}
void BK4819_StartTone1(const uint16_t frequency, const unsigned int level, const bool set_dac)
{
GPIO_ClearBit(&GPIOC->DATA, GPIOC_PIN_SPEAKER);
SYSTEM_DelayMs(2);
// BK4819_SetAF(BK4819_AF_MUTE);
BK4819_SetAF(BK4819_AF_BEEP);
// BK4819_SetAF(BK4819_AF_TONE);
BK4819_EnterTxMute();
BK4819_WriteRegister(0x70, BK4819_REG_70_ENABLE_TONE1 | ((level & 0x7f) << BK4819_REG_70_SHIFT_TONE1_TUNING_GAIN));
if (set_dac)
{
BK4819_WriteRegister(0x30, 0);
BK4819_WriteRegister(0x30, // all of the following must be enable to get an audio beep ! ???
BK4819_REG_30_ENABLE_VCO_CALIB |
BK4819_REG_30_ENABLE_UNKNOWN |
// BK4819_REG_30_ENABLE_RX_LINK |
BK4819_REG_30_ENABLE_AF_DAC | //
BK4819_REG_30_ENABLE_DISC_MODE | //
BK4819_REG_30_ENABLE_PLL_VCO |
BK4819_REG_30_ENABLE_PA_GAIN |
// BK4819_REG_30_ENABLE_MIC_ADC |
BK4819_REG_30_ENABLE_TX_DSP | //
// BK4819_REG_30_ENABLE_RX_DSP |
0);
}
BK4819_WriteRegister(0x71, scale_freq(frequency));
BK4819_ExitTxMute();
SYSTEM_DelayMs(2);
GPIO_SetBit(&GPIOC->DATA, GPIOC_PIN_SPEAKER);
}
void BK4819_StopTones(const bool tx)
{
GPIO_ClearBit(&GPIOC->DATA, GPIOC_PIN_SPEAKER);
SYSTEM_DelayMs(2);
BK4819_SetAF(BK4819_AF_MUTE);
BK4819_EnterTxMute();
BK4819_WriteRegister(0x70, 0);
BK4819_WriteRegister(0x30, 0);
if (tx)
{
BK4819_WriteRegister(0x30,
BK4819_REG_30_ENABLE_VCO_CALIB |
BK4819_REG_30_ENABLE_UNKNOWN |
// BK4819_REG_30_ENABLE_RX_LINK |
BK4819_REG_30_ENABLE_AF_DAC |
BK4819_REG_30_ENABLE_DISC_MODE |
BK4819_REG_30_ENABLE_PLL_VCO |
BK4819_REG_30_ENABLE_PA_GAIN |
BK4819_REG_30_ENABLE_MIC_ADC |
BK4819_REG_30_ENABLE_TX_DSP |
// BK4819_REG_30_ENABLE_RX_DSP |
0);
}
else
{
BK4819_WriteRegister(0x30,
BK4819_REG_30_ENABLE_VCO_CALIB |
// BK4819_REG_30_ENABLE_UNKNOWN |
BK4819_REG_30_ENABLE_RX_LINK |
BK4819_REG_30_ENABLE_AF_DAC |
BK4819_REG_30_ENABLE_DISC_MODE |
BK4819_REG_30_ENABLE_PLL_VCO |
// BK4819_REG_30_ENABLE_PA_GAIN |
// BK4819_REG_30_ENABLE_MIC_ADC |
// BK4819_REG_30_ENABLE_TX_DSP |
BK4819_REG_30_ENABLE_RX_DSP |
0);
}
BK4819_ExitTxMute();
// if (g_squelch_open || g_monitor_enabled)
// {
// SYSTEM_DelayMs(2);
// GPIO_SetBit(&GPIOC->DATA, GPIOC_PIN_SPEAKER);
// }
}
void BK4819_PlayTone(const unsigned int tone_Hz, const unsigned int delay, const unsigned int level)
{
const uint16_t prev_af = BK4819_ReadRegister(0x47);
BK4819_StartTone1(tone_Hz, level, true);
SYSTEM_DelayMs(delay - 2);
BK4819_StopTones(g_current_function == FUNCTION_TRANSMIT);
BK4819_WriteRegister(0x47, prev_af);
}
void BK4819_PlayRoger(void)
{
#if 0
const uint32_t tone1_Hz = 500;
const uint32_t tone2_Hz = 700;
#else
// motorola
const uint32_t tone1_Hz = 1540;
const uint32_t tone2_Hz = 1310;
#endif
const uint16_t prev_af = BK4819_ReadRegister(0x47);
BK4819_StartTone1(tone1_Hz, 96, true);
SYSTEM_DelayMs(80 - 2);
BK4819_StartTone1(tone2_Hz, 96, false);
SYSTEM_DelayMs(80);
BK4819_StopTones(true);
BK4819_WriteRegister(0x47, prev_af);
}
void BK4819_EnterTxMute(void)
{
BK4819_WriteRegister(0x50, 0xBB20);
}
void BK4819_ExitTxMute(void)
{
BK4819_WriteRegister(0x50, 0x3B20); // 0011 1011 0010 0000
}
void BK4819_Sleep(void)
{
BK4819_WriteRegister(0x30, 0);
BK4819_WriteRegister(0x37, 0x1D00); // 0 0 0111 0 1 0000 0 0 0 0
}
void BK4819_set_mic_gain(unsigned int level)
{
if (level > 31)
level = 31;
// mic gain 0.5dB/step 0 to 31
BK4819_WriteRegister(0x7D, 0xE940 | level);
// BK4819_WriteRegister(0x19, 0x1041); // 0001 0000 0100 0001 <15> MIC AGC 1 = disable 0 = enable .. doesn't work
}
void BK4819_TurnsOffTones_TurnsOnRX(void)
{
BK4819_WriteRegister(0x70, 0);
BK4819_SetAF(BK4819_AF_MUTE);
BK4819_ExitTxMute();
BK4819_WriteRegister(0x30, 0);
BK4819_WriteRegister(0x30,
BK4819_REG_30_ENABLE_VCO_CALIB |
// BK4819_REG_30_ENABLE_UNKNOWN |
BK4819_REG_30_ENABLE_RX_LINK |
BK4819_REG_30_ENABLE_AF_DAC |
BK4819_REG_30_ENABLE_DISC_MODE |
BK4819_REG_30_ENABLE_PLL_VCO |
// BK4819_REG_30_ENABLE_PA_GAIN |
// BK4819_REG_30_ENABLE_MIC_ADC |
// BK4819_REG_30_ENABLE_TX_DSP |
BK4819_REG_30_ENABLE_RX_DSP |
0);
}
void BK4819_Idle(void)
{
BK4819_WriteRegister(0x30, 0);
}
/*
void BK4819_ExitBypass(void)
{
BK4819_SetAF(BK4819_AF_MUTE);
// REG_7E
//
// <15> 0 AGC fix mode
// 1 = fix
// 0 = auto
//
// <14:12> 3 AGC fix index
// 3 ( 3) = max
// 2 ( 2)
// 1 ( 1)
// 0 ( 0)
// 7 (-1)
// 6 (-2)
// 5 (-3)
// 4 (-4) = min
//
// <11:6> 0 ???
//
// <5:3> 5 DC filter band width for Tx (MIC In)
// 0 ~ 7
// 0 = bypass DC filter
//
// <2:0> 6 DC filter band width for Rx (I.F In)
// 0 ~ 7
// 0 = bypass DC filter
//
BK4819_WriteRegister(0x7E, // 0x302E); // 0 011 000000 101 110
(0u << 15) | // 0 AGC fix mode
(3u << 12) | // 3 AGC fix index
(5u << 3) | // 5 DC Filter band width for Tx (MIC In)
(6u << 0)); // 6 DC Filter band width for Rx (I.F In)
}
*/
void BK4819_PrepareTransmit(void)
{
// BK4819_ExitBypass();
BK4819_ExitTxMute();
BK4819_config_sub_audible();
BK4819_WriteRegister(0x30, 0);
BK4819_WriteRegister(0x30,
BK4819_REG_30_ENABLE_VCO_CALIB |
BK4819_REG_30_ENABLE_UNKNOWN |
// BK4819_REG_30_ENABLE_RX_LINK |
// BK4819_REG_30_ENABLE_AF_DAC |
BK4819_REG_30_ENABLE_DISC_MODE |
BK4819_REG_30_ENABLE_PLL_VCO |
BK4819_REG_30_ENABLE_PA_GAIN |
BK4819_REG_30_ENABLE_MIC_ADC |
BK4819_REG_30_ENABLE_TX_DSP |
// BK4819_REG_30_ENABLE_RX_DSP |
0);
}
void BK4819_Conditional_RX_TurnOn(void)
{
if (g_rx_idle_mode)
{
BK4819_set_GPIO_pin(BK4819_GPIO0_PIN28_RX_ENABLE, true);
BK4819_RX_TurnOn();
}
}
void BK4819_EnterDTMF_TX(bool bLocalLoopback)
{
BK4819_EnableDTMF();
BK4819_EnterTxMute();
BK4819_SetAF(bLocalLoopback ? BK4819_AF_BEEP : BK4819_AF_MUTE);
BK4819_WriteRegister(0x70,
BK4819_REG_70_MASK_ENABLE_TONE1 |
(83u << BK4819_REG_70_SHIFT_TONE1_TUNING_GAIN) |
BK4819_REG_70_MASK_ENABLE_TONE2 |
(83u << BK4819_REG_70_SHIFT_TONE2_TUNING_GAIN));
BK4819_EnableTXLink();
}
void BK4819_ExitDTMF_TX(bool bKeep)
{
BK4819_EnterTxMute();
BK4819_SetAF(BK4819_AF_MUTE);
BK4819_WriteRegister(0x70, 0);
BK4819_DisableDTMF();
BK4819_WriteRegister(0x30,
BK4819_REG_30_ENABLE_VCO_CALIB |
BK4819_REG_30_ENABLE_UNKNOWN |
// BK4819_REG_30_ENABLE_RX_LINK |
// BK4819_REG_30_ENABLE_AF_DAC |
BK4819_REG_30_ENABLE_DISC_MODE |
BK4819_REG_30_ENABLE_PLL_VCO |
BK4819_REG_30_ENABLE_PA_GAIN |
BK4819_REG_30_ENABLE_MIC_ADC |
BK4819_REG_30_ENABLE_TX_DSP |
// BK4819_REG_30_ENABLE_RX_DSP |
0);
if (!bKeep)
BK4819_ExitTxMute();
}
void BK4819_EnableTXLink(void)
{
BK4819_WriteRegister(0x30,
BK4819_REG_30_ENABLE_VCO_CALIB |
BK4819_REG_30_ENABLE_UNKNOWN |
// BK4819_REG_30_ENABLE_RX_LINK |
BK4819_REG_30_ENABLE_AF_DAC |
BK4819_REG_30_ENABLE_DISC_MODE |
BK4819_REG_30_ENABLE_PLL_VCO |
BK4819_REG_30_ENABLE_PA_GAIN |
// BK4819_REG_30_ENABLE_MIC_ADC |
BK4819_REG_30_ENABLE_TX_DSP |
// BK4819_REG_30_ENABLE_RX_DSP |
0);
}
void BK4819_PlayDTMF(char Code)
{
uint32_t index = ((Code >= 65) ? (Code - 55) : ((Code <= 35) ? 15 :((Code <= 42) ? 14 : (Code - '0'))));
const uint16_t tones[2][16] =
{
{ // tone1
941, // '0'
679, // '1'
697, // '2'
679, // '3'
770, // '4'
770, // '5'
770, // '6'
852, // '7'
852, // '8'
852, // '9'
679, // 'A'
770, // 'B'
852, // 'C'
941, // 'D'
941, // '*'
941, // '#'
},
{ // tone2
1336, // '0'
1209, // '1'
1336, // '2'
1477, // '3'
1209, // '4'
1336, // '5'
1477, // '6'
1209, // '7'
1336, // '8'
1477, // '9'
1633, // 'A'
1633, // 'B'
1633, // 'C'
1633, // 'D'
1209, // '*'
1477 // '#'
}
};
if (index < 16)
{
BK4819_WriteRegister(0x71, (((uint32_t)tones[0][index] * 103244u) + 5000u) / 10000u); // with rounding
BK4819_WriteRegister(0x72, (((uint32_t)tones[1][index] * 103244u) + 5000u) / 10000u); // with rounding
}
}
void BK4819_PlayDTMFString(const char *pString, bool bDelayFirst, uint16_t FirstCodePersistTime, uint16_t HashCodePersistTime, uint16_t CodePersistTime, uint16_t CodeInternalTime)
{
unsigned int i;
if (pString == NULL)
return;
for (i = 0; pString[i]; i++)
{
uint16_t Delay;
BK4819_PlayDTMF(pString[i]);
BK4819_ExitTxMute();
if (bDelayFirst && i == 0)
Delay = FirstCodePersistTime;
else
if (pString[i] == '*' || pString[i] == '#')
Delay = HashCodePersistTime;
else
Delay = CodePersistTime;
SYSTEM_DelayMs(Delay);
BK4819_EnterTxMute();
SYSTEM_DelayMs(CodeInternalTime);
}
}
void BK4819_TransmitTone(bool bLocalLoopback, uint32_t Frequency)
{
BK4819_EnterTxMute();
// REG_70
//
// <15> 0 Enable TONE1
// 1 = Enable
// 0 = Disable
//
// <14:8> 0 TONE1 tuning gain
// 0 ~ 127
//
// <7> 0 Enable TONE2
// 1 = Enable
// 0 = Disable
//
// <6:0> 0 TONE2/FSK amplitude
// 0 ~ 127
//
// set the tone amplitude
//
// BK4819_WriteRegister(0x70, BK4819_REG_70_MASK_ENABLE_TONE1 | (96u << BK4819_REG_70_SHIFT_TONE1_TUNING_GAIN));
BK4819_WriteRegister(0x70, BK4819_REG_70_MASK_ENABLE_TONE1 | (28u << BK4819_REG_70_SHIFT_TONE1_TUNING_GAIN));
BK4819_WriteRegister(0x71, scale_freq(Frequency));
BK4819_SetAF(bLocalLoopback ? BK4819_AF_BEEP : BK4819_AF_MUTE);
BK4819_EnableTXLink();
SYSTEM_DelayMs(50);
BK4819_ExitTxMute();
}
void BK4819_disable_sub_audible(void)
{
BK4819_WriteRegister(0x51, 0);
}
void BK4819_config_sub_audible(void)
{
// #ifdef ENABLE_CTCSS_TAIL_PHASE_SHIFT
// BK4819_gen_tail(2); // 180 deg
// #else
// BK4819_gen_tail(4);
BK4819_WriteRegister(0x52, (0u << 15) | (0u << 13) | (0u << 12) | (10u << 6) | (15u << 0)); // 0x028F); // 0 00 0 001010 001111
// #endif
}
// freq_10Hz is CTCSS Hz * 10
void BK4819_set_tail_detection(const uint32_t freq_10Hz)
{
// REG_07 <15:0>
//
// <15) ???
//
// <14:13> 0 = CTC-1, 1 = CTC-2 (tail detection), 2 = CDCSS 134.4Hz
//
// if <14:13> == 0
// <12:0> CTC1 frequency control word =
// freq(Hz) * 20.64888 for XTAL 13M/26M or
// freq(Hz) * 20.97152 for XTAL 12.8M/19.2M/25.6M/38.4M
//
// if <14:13> == 1
// <12:0> CTC2 (should below 100Hz) frequency control word =
// 25391 / freq(Hz) for XTAL 13M/26M or
// 25000 / freq(Hz) for XTAL 12.8M/19.2M/25.6M/38.4M
//
// if <14:13> == 2
// <12:0> CDCSS baud rate frequency (134.4Hz) control word =
// freq(Hz) * 20.64888 for XTAL 13M/26M or
// freq(Hz) * 20.97152 for XTAL 12.8M/19.2M/25.6M/38.4M
//
#ifdef ENABLE_CTCSS_TAIL_PHASE_SHIFT
BK4819_WriteRegister(0x07, (0u << 13) | (((freq_10Hz * 206488u) + 50000u) / 100000u));
#else
BK4819_WriteRegister(0x07, (1u << 13) | ((253910 + (freq_10Hz / 2)) / freq_10Hz)); // with rounding
#endif
}
void BK4819_gen_tail(const unsigned int tail)
{
// REG_52
//
// <15> degree shift CTCSS or 134.4Hz tail CDCSS
// 0 = normal
// 1 = enable
//
// <14:13> CTCSS tail mode selection (only valid when <15> == 1)
// 0 = for 134.4Hz CTCSS Tail when CDCSS mode
// 1 = CTCSS0 120° phase shift
// 2 = CTCSS0 180° phase shift
// 3 = CTCSS0 240° phase shift
//
// <12> CTCSS Detection Threshold Mode
// 1 = ~0.1%
// 0 = 0.1Hz
//
// <11:6> 10 CTCSS found detect threshold 0 ~ 63
//
// <5:0> 15 CTCSS lost detect threshold 0 ~ 63
uint16_t tail_phase_shift = 1;
uint16_t ctcss_tail_mode_selection = 0;
uint16_t ctcss_detect_threshold_mode = 0;
#if 0
// original QS setting
uint16_t ctcss_found_threshold = 10;
uint16_t ctcss_lost_threshold = 15;
#else
// increase it to help reduce false detections when doing CTCSS/CDCSS searching
uint16_t ctcss_found_threshold = 15;
uint16_t ctcss_lost_threshold = 23;
#endif
switch (tail)
{
case 0: // 134.4Hz CTCSS Tail
// ctcss_tail_mode_selection = 0;
break;
case 1: // 120° phase shift
ctcss_tail_mode_selection = 1;
break;
case 2: // 180° phase shift 1 10 0 001010 001111
ctcss_tail_mode_selection = 2;
break;
case 3: // 240° phase shift
ctcss_tail_mode_selection = 3;
break;
default:
case 4: // 55Hz tone freq
tail_phase_shift = 0;
ctcss_found_threshold = 17;
ctcss_lost_threshold = 47;
break;
}
BK4819_WriteRegister(0x52,
(tail_phase_shift << 15) |
(ctcss_tail_mode_selection << 13) |
(ctcss_detect_threshold_mode << 12) |
(ctcss_found_threshold << 6) |
(ctcss_lost_threshold << 0));
}
void BK4819_set_CDCSS_code(const uint32_t control_word)
{
BK4819_WriteRegister(0x51,
( 1u << 15) | // TX CTCSS/CDCSS 1 = enable 0 = disable
( 0u << 14) | // GPIO input for CDCSS 0 = normal (for BK4819v3)
( 0u << 13) | // TX CDCSS code 1 = negative 0 = positive
( 0u << 12) | // CTCSS/CDCSS mode selection 1 = CTCSS 0 = CDCSS
( 0u << 11) | // CDCSS 24/23bit selection 1 = 24bit 0 = 23bit
( 0u << 10) | // 1050Hz detection mode 1 = enable, CTC1 should be set to 1050/4 Hz
( 1u << 9) | // Auto CDCSS BW Mode 1 = disable 0 = enable
( 1u << 8) | // Auto CTCSS BW Mode 1 = disable 0 = enable
( 0u << 7) | // ???
(51u << 0)); // CTCSS/CDCSS TX gain 1 0 ~ 127
// REG_07 <15:0>
//
// <15) ???
//
// <14:13> 0 = CTC-1, 1 = CTC-2 (tail detection), 2 = CDCSS 134.4Hz
//
// <14:13> == 0
// <12:0> CTC1 frequency control word =
// freq(Hz) * 20.64888 for XTAL 13M/26M or
// freq(Hz) * 20.97152 for XTAL 12.8M/19.2M/25.6M/38.4M
//
// <14:13> == 1
// <12:0> CTC2 (should below 100Hz) frequency control word =
// 25391 / freq(Hz) for XTAL 13M/26M or
// 25000 / freq(Hz) for XTAL 12.8M/19.2M/25.6M/38.4M
//
// <14:13> == 2
// <12:0> CDCSS baud rate frequency (134.4Hz) control word =
// freq(Hz) * 20.64888 for XTAL 13M/26M or
// freq(Hz) * 20.97152 for XTAL 12.8M/19.2M/25.6M/38.4M
//
BK4819_WriteRegister(0x07, (0u << 13) | 2775u);
// REG_08 <15:0> <15> = 1 for CDCSS high 12bit
// <15> = 0 for CDCSS low 12bit
// <11:0> = CDCSShigh/low 12bit code
//
BK4819_WriteRegister(0x08, (0u << 15) | ((control_word >> 0) & 0x0FFF)); // LS 12-bits
BK4819_WriteRegister(0x08, (1u << 15) | ((control_word >> 12) & 0x0FFF)); // MS 12-bits
}
void BK4819_set_CTCSS_freq(const uint32_t control_word)
{
if (control_word == 0)
{ // NOAA 1050Hz tone stuff
BK4819_WriteRegister(0x51,
( 1u << 15) | // TX CTCSS/CDCSS 1 = enable 0 = disable
( 0u << 14) | // GPIO input for CDCSS 0 = normal (for BK4819v3)
( 0u << 13) | // TX CDCSS code 1 = negative 0 = positive
( 1u << 12) | // CTCSS/CDCSS mode selection 1 = CTCSS 0 = CDCSS
( 0u << 11) | // CDCSS 24/23bit selection 1 = 24bit 0 = 23bit
( 1u << 10) | // 1050Hz detection mode 1 = enable, CTC1 should be set to 1050/4 Hz
( 0u << 9) | // Auto CDCSS BW Mode 1 = disable 0 = enable
( 0u << 8) | // Auto CTCSS BW Mode 1 = disable 0 = enable
( 0u << 7) | // ???
(74u << 0)); // CTCSS/CDCSS TX gain 1 0 ~ 127
}
else
{ // normal CTCSS
BK4819_WriteRegister(0x51,
( 1u << 15) | // TX CTCSS/CDCSS 1 = enable 0 = disable
( 0u << 14) | // GPIO input for CDCSS 0 = normal (for BK4819v3)
( 0u << 13) | // TX CDCSS code 1 = negative 0 = positive
( 1u << 12) | // CTCSS/CDCSS mode selection 1 = CTCSS 0 = CDCSS
( 0u << 11) | // CDCSS 24/23bit selection 1 = 24bit 0 = 23bit
( 0u << 10) | // 1050Hz detection mode 1 = enable, CTC1 should be set to 1050/4 Hz
( 0u << 9) | // Auto CDCSS BW Mode 1 = disable 0 = enable
( 0u << 8) | // Auto CTCSS BW Mode 1 = disable 0 = enable
( 0u << 7) | // ???
(74u << 0)); // CTCSS/CDCSS TX gain 1 0 ~ 127
}
// REG_07 <15:0>
//
// <15) 0
//
// <14:13> 0 = CTC-1, 1 = CTC-2 (tail detection), 2 = CDCSS 134.4Hz
//
// if <14:13> == 0
// <12:0> CTC1 frequency control word =
// freq(Hz) * 20.64888 for XTAL 13M/26M or
// freq(Hz) * 20.97152 for XTAL 12.8M/19.2M/25.6M/38.4M
//
// if <14:13> == 1
// <12:0> CTC2 (should be below 100Hz) frequency control word =
// 25391 / freq(Hz) for XTAL 13M/26M or
// 25000 / freq(Hz) for XTAL 12.8M/19.2M/25.6M/38.4M
//
// if <14:13> == 2
// <12:0> CDCSS baud rate frequency (134.4Hz) control word =
// freq(Hz) * 20.64888 for XTAL 13M/26M or
// freq(Hz) * 20.97152 for XTAL 12.8M/19.2M/25.6M/38.4M
//
#ifdef ENABLE_CTCSS_TAIL_PHASE_SHIFT
BK4819_WriteRegister(0x07, (0u << 13) | (((control_word * 206488u) + 50000u) / 100000u));
#else
BK4819_WriteRegister(0x07, (1u << 13) | ((253910 + (control_word / 2)) / control_word));
#endif
}
void BK4819_enable_CDCSS_tail(void)
{
BK4819_gen_tail(0); // CTC134
BK4819_WriteRegister(0x51, // 0x804A); // 1 0 0 0 0 0 0 0 0 1001010
( 1u << 15) | // TX CTCSS/CDCSS 1 = enable 0 = disable
( 0u << 14) | // GPIO0 input for CDCSS 0 = normal (for BK4819v3)
( 0u << 13) | // TX CDCSS code 1 = negative 0 = positive
( 0u << 12) | // CTCSS/CDCSS mode selection 1 = CTCSS 0 = CDCSS
( 0u << 11) | // CDCSS 24/23bit selection 1 = 24bit 0 = 23bit
( 0u << 10) | // 1050Hz detection mode 1 = enable, CTC1 should be set to 1050/4 Hz
( 0u << 9) | // Auto CDCSS BW Mode 1 = disable 0 = enable
( 0u << 8) | // Auto CTCSS BW Mode 1 = disable 0 = enable
( 0u << 7) | // ???
(74u << 0)); // CTCSS/CDCSS TX gain 1 0 ~ 127
}
void BK4819_enable_CTCSS_tail(void)
{
#ifdef ENABLE_CTCSS_TAIL_PHASE_SHIFT
//BK4819_gen_tail(1); // 120° phase shift
BK4819_gen_tail(2); // 180° phase shift
//BK4819_gen_tail(3); // 240° phase shift
#else
BK4819_gen_tail(4); // 55Hz tone freq
#endif
BK4819_WriteRegister(0x51, // 0x804A); // 1 0 0 0 0 0 0 0 0 1001010
( 1u << 15) | // TX CTCSS/CDCSS 1 = enable 0 = disable
( 0u << 14) | // GPIO0 input for CDCSS 0 = normal (for BK4819v3)
( 0u << 13) | // TX CDCSS code 1 = negative 0 = positive
( 1u << 12) | // CTCSS/CDCSS mode selection 1 = CTCSS 0 = CDCSS
( 0u << 11) | // CDCSS 24/23bit selection 1 = 24bit 0 = 23bit
( 0u << 10) | // 1050Hz detection mode 1 = enable, CTC1 should be set to 1050/4 Hz
( 0u << 9) | // Auto CDCSS BW Mode 1 = disable 0 = enable
( 0u << 8) | // Auto CTCSS BW Mode 1 = disable 0 = enable
( 0u << 7) | // ???
(74u << 0)); // CTCSS/CDCSS TX gain 1 0 ~ 127
}
uint16_t BK4819_GetRSSI(void)
{
return BK4819_ReadRegister(0x67) & 0x01FF;
}
uint8_t BK4819_GetGlitchIndicator(void)
{
return BK4819_ReadRegister(0x63) & 0x00FF;
}
uint8_t BK4819_GetExNoiceIndicator(void)
{
return BK4819_ReadRegister(0x65) & 0x007F;
}
uint16_t BK4819_GetVoiceAmplitudeOut(void)
{
return BK4819_ReadRegister(0x64);
}
uint8_t BK4819_GetAfTxRx(void)
{
return BK4819_ReadRegister(0x6F) & 0x003F;
}
bool BK4819_GetFrequencyScanResult(uint32_t *pFrequency)
{
// **********
// REG_0D read only
//
// <15> frequency scan indicator
// 1 = busy
// 0 = finished
//
// <14:11> ???
//
// <10:0> frequency scan high 16 bits
//
// **********
// REG_0E read only
//
// <15:0> frequency scan low 16 bits
//
// **********
// (REG_0D <10:0> << 16) | (REG_0E <15:0>) .. unit is 10Hz
//
const uint16_t high = BK4819_ReadRegister(0x0D);
const uint16_t low = BK4819_ReadRegister(0x0E);
const bool finished = ((high >> 15) & 1u) == 0;
*pFrequency = ((uint32_t)(high & 0x07FF) << 16) | low;
return finished;
}
BK4819_CSS_scan_result_t BK4819_GetCxCSSScanResult(uint32_t *pCdcssFreq, uint16_t *pCtcssFreq)
{
// **********
// REG_68 read only
//
// <15> CTCSS scan indicator
// 1 = busy
// 0 = found
//
// <12:0> CTCSS frequency (Hz)
// div by 20.64888 ... 13M / 26M XTAL
// div by 20.97152 ... 12.8M / 19.2M / 25.6M / 38.4M XTAL
//
// **********
// REG_69 read only
//
// <15> CDCSS scan indicator
// 1 = busy
// 0 = found
//
// <14> 23 or 24 bit CDCSS Indicator (BK4819v3)
// 1 = 24 bit
// 0 = 23 bit
//
// <11:0> CDCSS High 12 bits
//
// **********
// REG_6A read only
//
// <11:0> CDCSS Low 12 bits
//
//
const uint16_t High = BK4819_ReadRegister(0x69);
uint16_t Low;
if (((High >> 15) & 1u) == 0)
{ // CDCSS
Low = BK4819_ReadRegister(0x6A);
*pCdcssFreq = ((uint32_t)(High & 0xFFF) << 12) | (Low & 0xFFF);
return BK4819_CSS_RESULT_CDCSS;
}
Low = BK4819_ReadRegister(0x68);
if (((Low >> 15) & 1u) == 0)
{ // CTCSS
*pCtcssFreq = ((uint32_t)(Low & 0x1FFF) * 4843) / 10000;
return BK4819_CSS_RESULT_CTCSS;
}
return BK4819_CSS_RESULT_NOT_FOUND;
}
void BK4819_DisableFrequencyScan(void)
{
// REG_32
//
// <15:14> 0 frequency scan time
// 0 = 0.2 sec
// 1 = 0.4 sec
// 2 = 0.8 sec
// 3 = 1.6 sec
//
// <13:1> ???
//
// <0> 0 frequency scan enable
// 1 = enable
// 0 = disable
//
BK4819_WriteRegister(0x32, // 0x0244); // 00 0000100100010 0
( 0u << 14) | // 0 frequency scan Time
(290u << 1) | // ???
( 0u << 0)); // 0 frequency scan enable
}
void BK4819_EnableFrequencyScan(void)
{
// REG_32
//
// <15:14> 0 frequency scan time
// 0 = 0.2 sec
// 1 = 0.4 sec
// 2 = 0.8 sec
// 3 = 1.6 sec
//
// <13:1> ???
//
// <0> 0 frequency scan enable
// 1 = enable
// 0 = disable
//
BK4819_WriteRegister(0x32, // 0x0245); // 00 0000100100010 1
( 0u << 14) | // 0 frequency scan time
(290u << 1) | // ???
( 1u << 0)); // 1 frequency scan enable
}
void BK4819_set_scan_frequency(uint32_t Frequency)
{
BK4819_set_rf_frequency(Frequency, false);
BK4819_WriteRegister(0x51,
(0u << 15) | // TX CTCSS/CDCSS 1 = enable 0 = disable
(0u << 14) | // GPIO input for CDCSS 0 = normal (for BK4819v3)
(0u << 13) | // TX CDCSS code 1 = negative 0 = positive
(0u << 12) | // CTCSS/CDCSS mode selection 1 = CTCSS 0 = CDCSS
(0u << 11) | // CDCSS 24/23bit selection 1 = 24bit 0 = 23bit
(0u << 10) | // 1050Hz detection mode 1 = enable, CTC1 should be set to 1050/4 Hz
(1u << 9) | // Auto CDCSS BW Mode 1 = disable 0 = enable
(1u << 8) | // Auto CTCSS BW Mode 1 = disable 0 = enable
(0u << 7) | // ???
(0u << 0)); // CTCSS/CDCSS TX gain 1 0 ~ 127
BK4819_RX_TurnOn();
}
void BK4819_StopScan(void)
{
BK4819_DisableFrequencyScan();
BK4819_WriteRegister(0x30, 0);
}
uint8_t BK4819_GetDTMF_5TONE_Code(void)
{
return (BK4819_ReadRegister(0x0B) >> 8) & 0x0F;
}
uint8_t BK4819_get_CDCSS_code_type(void)
{
return (BK4819_ReadRegister(0x0C) >> 14) & 3u;
}
uint8_t BK4819_GetCTCShift(void)
{
return (BK4819_ReadRegister(0x0C) >> 12) & 3u;
}
uint8_t BK4819_GetCTCType(void)
{
return (BK4819_ReadRegister(0x0C) >> 10) & 3u;
}
void BK4819_reset_fsk(void)
{
const uint16_t fsk_reg59 =
(0u << 15) | // 0 or 1 1 = clear TX FIFO
(0u << 14) | // 0 or 1 1 = clear RX FIFO
(0u << 13) | // 0 or 1 1 = scramble
(0u << 12) | // 0 or 1 1 = enable RX
(0u << 11) | // 0 or 1 1 = enable TX
(0u << 10) | // 0 or 1 1 = invert data when RX
(0u << 9) | // 0 or 1 1 = invert data when TX
(0u << 8) | // 0 or 1 ???
(6u << 4) | // 0 ~ 15 preamble Length Selection
(1u << 3) | // 0 or 1 sync length selection
(0u << 0); // 0 ~ 7 ???
BK4819_WriteRegister(0x3F, 0); // disable interrupts
BK4819_WriteRegister(0x59, (1u << 15) | (1u << 14) | fsk_reg59); // clear FIFO's
BK4819_WriteRegister(0x59, fsk_reg59);
BK4819_WriteRegister(0x30, 0);
}
#ifdef ENABLE_AIRCOPY
void BK4819_SetupAircopy(const unsigned int packet_size)
{
if (packet_size == 0)
return;
// REG_70
//
// <15> 0 TONE-1
// 1 = enable
// 0 = disable
//
// <14:8> 0 TONE-1 gain
//
// <7> 0 TONE-2
// 1 = enable
// 0 = disable
//
// <6:0> 0 TONE-2 / FSK gain
// 0 ~ 127
//
// enable tone-2, set gain
//
BK4819_WriteRegister(0x70, // 0 0000000 1 1100000
( 0u << 15) |
( 0u << 8) |
( 1u << 7) |
// (96u << 0));
(127u << 0)); // best waveform
// REG_72
//
// <15:0> 0x2854 TONE2/FSK frequency control word
// = freq(Hz) * 10.32444 for XTAL 13M / 26M or
// = freq(Hz) * 10.48576 for XTAL 12.8M / 19.2M / 25.6M / 38.4M
//
// tone-2 = 1200Hz
//
BK4819_WriteRegister(0x72, ((1200u * 103244) + 5000) / 10000); // with rounding
// aircopy is done in direct FM mode
//
BK4819_WriteRegister(0x58, // 0x00C1); // 000 000 00 11 00 000 1
(0u << 13) | // 1 FSK TX mode selection
// 0 = FSK 1.2K and FSK 2.4K TX .. no tones, direct FM
// 1 = FFSK 1200 / 1800 TX
// 2 = ???
// 3 = FFSK 1200 / 2400 TX
// 4 = ???
// 5 = NOAA SAME TX
// 6 = ???
// 7 = ???
//
(0u << 10) | // 0 FSK RX mode selection
// 0 = FSK 1.2K, FSK 2.4K RX and NOAA SAME RX .. no tones, direct FM
// 1 = ???
// 2 = ???
// 3 = ???
// 4 = FFSK 1200 / 2400 RX
// 5 = ???
// 6 = ???
// 7 = FFSK 1200 / 1800 RX
//
(0u << 8) | // 0 FSK RX gain
// 0 ~ 3
//
(3u << 6) | // 0 ???
// 0 ~ 3
//
(0u << 4) | // 0 FSK preamble type selection
// 0 = 0xAA or 0x55 due to the MSB of FSK sync byte 0
// 1 = ???
// 2 = 0x55
// 3 = 0xAA
//
(0u << 1) | // 1 FSK RX bandwidth setting
// 0 = FSK 1.2K .. no tones, direct FM
// 1 = FFSK 1200 / 1800
// 2 = NOAA SAME RX
// 3 = ???
// 4 = FSK 2.4K and FFSK 1200 / 2400
// 5 = ???
// 6 = ???
// 7 = ???
//
(1u << 0)); // 1 FSK enable
// 0 = disable
// 1 = enable
// REG_5C
//
// <15:7> ???
//
// <6> 1 CRC option enable
// 0 = disable
// 1 = enable
//
// <5:0> ???
//
// Enable CRC among other things we don't know yet
//
BK4819_WriteRegister(0x5C, 0x5665); // 010101100 1 100101
// REG_5D
//
// <15:8> 15 FSK data length (byte) Low 8 bits (total 11 bits for BK4819v3)
// 15 means 16 bytes in length
//
// <7:5> 0 FSK data
//
// <4:0> 0 ???
//
BK4819_WriteRegister(0x5D, ((packet_size - 1) << 8));
}
void BK4819_start_aircopy_fsk_rx(const unsigned int packet_size)
{
uint16_t fsk_reg59;
BK4819_reset_fsk();
BK4819_WriteRegister(0x02, 0); // clear interrupt flags
// set the almost full threshold
BK4819_WriteRegister(0x5E, (64u << 3) | (1u << 0)); // 0 ~ 127, 0 ~ 7
// set the packet size
BK4819_WriteRegister(0x5D, ((packet_size - 1) << 8));
BK4819_RX_TurnOn();
// BK4819_WriteRegister(0x3F, BK4819_REG_3F_FSK_RX_FINISHED | BK4819_REG_3F_FSK_FIFO_ALMOST_FULL);
BK4819_WriteRegister(0x3F, BK4819_REG_3F_FSK_RX_SYNC | BK4819_REG_3F_FSK_RX_FINISHED | BK4819_REG_3F_FSK_FIFO_ALMOST_FULL);
// REG_59
//
// <15> 0 TX FIFO
// 1 = clear
//
// <14> 0 RX FIFO
// 1 = clear
//
// <13> 0 FSK Scramble
// 1 = Enable
//
// <12> 0 FSK RX
// 1 = Enable
//
// <11> 0 FSK TX
// 1 = Enable
//
// <10> 0 FSK data when RX
// 1 = Invert
//
// <9> 0 FSK data when TX
// 1 = Invert
//
// <8> 0 ???
//
// <7:4> 0 FSK preamble length selection
// 0 = 1 byte
// 1 = 2 bytes
// 2 = 3 bytes
// 15 = 16 bytes
//
// <3> 0 FSK sync length selection
// 0 = 2 bytes (FSK Sync Byte 0, 1)
// 1 = 4 bytes (FSK Sync Byte 0, 1, 2, 3)
//
// <2:0> 0 ???
//
fsk_reg59 = (0u << 15) | // 0 or 1 1 = clear TX FIFO
(0u << 14) | // 0 or 1 1 = clear RX FIFO
(0u << 13) | // 0 or 1 1 = scramble
(0u << 12) | // 0 or 1 1 = enable RX
(0u << 11) | // 0 or 1 1 = enable TX
(0u << 10) | // 0 or 1 1 = invert data when RX
(0u << 9) | // 0 or 1 1 = invert data when TX
(0u << 8) | // 0 or 1 ???
// (6u << 4) | // 0 ~ 15 preamble Length Selection
(4u << 4) | // 0 ~ 15 preamble Length Selection .. 1of11 .. a little shorter than the TX length
(1u << 3) | // 0 or 1 sync length selection
(0u << 0); // 0 ~ 7 ???
BK4819_WriteRegister(0x59, (1u << 15) | (1u << 14) | fsk_reg59); // clear FIFO's
BK4819_WriteRegister(0x59, (1u << 13) | (1u << 12) | fsk_reg59); // enable scrambler, enable RX
}
#endif
#ifdef ENABLE_MDC1200
void BK4819_enable_mdc1200_rx(const bool enable)
{
// REG_70
//
// <15> 0 TONE-1
// 1 = enable
// 0 = disable
//
// <14:8> 0 TONE-1 gain
//
// <7> 0 TONE-2
// 1 = enable
// 0 = disable
//
// <6:0> 0 TONE-2 / FSK gain
// 0 ~ 127
//
// enable tone-2, set gain
// REG_72
//
// <15:0> 0x2854 TONE-2 / FSK frequency control word
// = freq(Hz) * 10.32444 for XTAL 13M / 26M or
// = freq(Hz) * 10.48576 for XTAL 12.8M / 19.2M / 25.6M / 38.4M
//
// tone-2 = 1200Hz
// REG_58
//
// <15:13> 1 FSK TX mode selection
// 0 = FSK 1.2K and FSK 2.4K TX .. no tones, direct FM
// 1 = FFSK 1200 / 1800 TX
// 2 = ???
// 3 = FFSK 1200 / 2400 TX
// 4 = ???
// 5 = NOAA SAME TX
// 6 = ???
// 7 = ???
//
// <12:10> 0 FSK RX mode selection
// 0 = FSK 1.2K, FSK 2.4K RX and NOAA SAME RX .. no tones, direct FM
// 1 = ???
// 2 = ???
// 3 = ???
// 4 = FFSK 1200 / 2400 RX
// 5 = ???
// 6 = ???
// 7 = FFSK 1200 / 1800 RX
//
// <9:8> 0 FSK RX gain
// 0 ~ 3
//
// <7:6> 0 ???
// 0 ~ 3
//
// <5:4> 0 FSK preamble type selection
// 0 = 0xAA or 0x55 due to the MSB of FSK sync byte 0
// 1 = ???
// 2 = 0x55
// 3 = 0xAA
//
// <3:1> 1 FSK RX bandwidth setting
// 0 = FSK 1.2K .. no tones, direct FM
// 1 = FFSK 1200 / 1800
// 2 = NOAA SAME RX
// 3 = ???
// 4 = FSK 2.4K and FFSK 1200 / 2400
// 5 = ???
// 6 = ???
// 7 = ???
//
// <0> 1 FSK enable
// 0 = disable
// 1 = enable
// REG_5C
//
// <15:7> ???
//
// <6> 1 CRC option enable
// 0 = disable
// 1 = enable
//
// <5:0> ???
//
// disable CRC
// REG_5D
//
// set the packet size
if (enable)
{
const uint16_t fsk_reg59 =
(0u << 15) | // 1 = clear TX FIFO
(0u << 14) | // 1 = clear RX FIFO
(0u << 13) | // 1 = scramble
(0u << 12) | // 1 = enable RX
(0u << 11) | // 1 = enable TX
(0u << 10) | // 1 = invert data when RX
(0u << 9) | // 1 = invert data when TX
(0u << 8) | // ???
(0u << 4) | // 0 ~ 15 preamble length selection .. mdc1200 does not send bit reversals :(
(1u << 3) | // 0/1 sync length selection
(0u << 0); // 0 ~ 7 ???
BK4819_WriteRegister(0x70,
( 0u << 15) | // 0
( 0u << 8) | // 0
( 1u << 7) | // 1
(96u << 0)); // 96
BK4819_WriteRegister(0x72, ((1200u * 103244) + 5000) / 10000); // with rounding
BK4819_WriteRegister(0x58,
(1u << 13) | // 1 FSK TX mode selection
// 0 = FSK 1.2K and FSK 2.4K TX .. no tones, direct FM
// 1 = FFSK 1200 / 1800 TX
// 2 = ???
// 3 = FFSK 1200 / 2400 TX
// 4 = ???
// 5 = NOAA SAME TX
// 6 = ???
// 7 = ???
//
(7u << 10) | // 0 FSK RX mode selection
// 0 = FSK 1.2K, FSK 2.4K RX and NOAA SAME RX .. no tones, direct FM
// 1 = ???
// 2 = ???
// 3 = ???
// 4 = FFSK 1200 / 2400 RX
// 5 = ???
// 6 = ???
// 7 = FFSK 1200 / 1800 RX
//
(3u << 8) | // 0 FSK RX gain
// 0 ~ 3
//
(0u << 6) | // 0 ???
// 0 ~ 3
//
(0u << 4) | // 0 FSK preamble type selection
// 0 = 0xAA or 0x55 due to the MSB of FSK sync byte 0
// 1 = ???
// 2 = 0x55
// 3 = 0xAA
//
(1u << 1) | // 1 FSK RX bandwidth setting
// 0 = FSK 1.2K .. no tones, direct FM
// 1 = FFSK 1200 / 1800
// 2 = NOAA SAME RX
// 3 = ???
// 4 = FSK 2.4K and FFSK 1200 / 2400
// 5 = ???
// 6 = ???
// 7 = ???
//
(1u << 0)); // 1 FSK enable
// 0 = disable
// 1 = enable
// REG_5A .. bytes 0 & 1 sync pattern
//
// <15:8> sync byte 0
// < 7:0> sync byte 1
// BK4819_WriteRegister(0x5A, ((uint16_t)mdc1200_sync_suc_xor[0] << 8) | (mdc1200_sync_suc_xor[1] << 0));
BK4819_WriteRegister(0x5A, ((uint16_t)mdc1200_sync_suc_xor[1] << 8) | (mdc1200_sync_suc_xor[2] << 0));
// REG_5B .. bytes 2 & 3 sync pattern
//
// <15:8> sync byte 2
// < 7:0> sync byte 3
// BK4819_WriteRegister(0x5B, ((uint16_t)mdc1200_sync_suc_xor[2] << 8) | (mdc1200_sync_suc_xor[3] << 0));
BK4819_WriteRegister(0x5B, ((uint16_t)mdc1200_sync_suc_xor[3] << 8) | (mdc1200_sync_suc_xor[4] << 0));
// disable CRC
BK4819_WriteRegister(0x5C, 0x5625); // 01010110 0 0 100101
// BK4819_WriteRegister(0x5C, 0xAA30); // 10101010 0 0 110000
// set the almost full threshold
BK4819_WriteRegister(0x5E, (64u << 3) | (1u << 0)); // 0 ~ 127, 0 ~ 7
{ // packet size .. sync + 14 bytes - size of a single mdc1200 packet
// uint16_t size = 1 + (MDC1200_FEC_K * 2);
uint16_t size = 0 + (MDC1200_FEC_K * 2);
// size -= (fsk_reg59 & (1u << 3)) ? 4 : 2;
size = ((size + 1) / 2) * 2; // round up to even, else FSK RX doesn't work
BK4819_WriteRegister(0x5D, ((size - 1) << 8));
}
// clear FIFO's then enable RX
BK4819_WriteRegister(0x59, (1u << 15) | (1u << 14) | fsk_reg59);
BK4819_WriteRegister(0x59, (1u << 12) | fsk_reg59);
// clear interrupt flags
BK4819_WriteRegister(0x02, 0);
// BK4819_RX_TurnOn();
// enable interrupts
// BK4819_WriteRegister(0x3F, BK4819_ReadRegister(0x3F) | BK4819_REG_3F_FSK_RX_SYNC | BK4819_REG_3F_FSK_RX_FINISHED | BK4819_REG_3F_FSK_FIFO_ALMOST_FULL);
}
else
{
BK4819_WriteRegister(0x70, 0);
BK4819_WriteRegister(0x58, 0);
}
}
void BK4819_send_MDC1200(const uint8_t op, const uint8_t arg, const uint16_t id)
{
uint16_t fsk_reg59;
uint8_t packet[42];
// create the MDC1200 packet
const unsigned int size = MDC1200_encode_single_packet(packet, op, arg, id);
//BK4819_ExitTxMute();
BK4819_WriteRegister(0x50, 0x3B20); // 0011 1011 0010 0000
BK4819_WriteRegister(0x30,
BK4819_REG_30_ENABLE_VCO_CALIB |
BK4819_REG_30_ENABLE_UNKNOWN |
// BK4819_REG_30_ENABLE_RX_LINK |
BK4819_REG_30_ENABLE_AF_DAC |
BK4819_REG_30_ENABLE_DISC_MODE |
BK4819_REG_30_ENABLE_PLL_VCO |
BK4819_REG_30_ENABLE_PA_GAIN |
// BK4819_REG_30_ENABLE_MIC_ADC |
BK4819_REG_30_ENABLE_TX_DSP |
// BK4819_REG_30_ENABLE_RX_DSP |
0);
#if 1
GPIO_ClearBit(&GPIOC->DATA, GPIOC_PIN_SPEAKER);
BK4819_SetAF(BK4819_AF_MUTE);
#else
// let the user hear the FSK being sent
BK4819_SetAF(BK4819_AF_BEEP);
GPIO_SetBit(&GPIOC->DATA, GPIOC_PIN_SPEAKER);
#endif
// SYSTEM_DelayMs(2);
// REG_51
//
// <15> TxCTCSS/CDCSS 0 = disable 1 = Enable
//
// turn off CTCSS/CDCSS during FFSK
const uint16_t css_val = BK4819_ReadRegister(0x51);
BK4819_WriteRegister(0x51, 0);
// set the FM deviation level
const uint16_t dev_val = BK4819_ReadRegister(0x40);
#if defined(ENABLE_UART) && defined(ENABLE_UART_DEBUG)
// UART_printf("tx dev %04X\r\n", dev_val);
#endif
{
uint16_t deviation = 850;
switch (m_bandwidth)
{
case BK4819_FILTER_BW_WIDE: deviation = 1050; break;
case BK4819_FILTER_BW_NARROW: deviation = 850; break;
case BK4819_FILTER_BW_NARROWER: deviation = 750; break;
}
//BK4819_WriteRegister(0x40, (3u << 12) | (deviation & 0xfff));
BK4819_WriteRegister(0x40, (dev_val & 0xf000) | (deviation & 0xfff));
}
// REG_2B 0
//
// <10> 0 AF RX HPF 300Hz filter 0 = enable 1 = disable
// <9> 0 AF RX LPF 3kHz filter 0 = enable 1 = disable
// <8> 0 AF RX de-emphasis filter 0 = enable 1 = disable
// <2> 0 AF TX HPF 300Hz filter 0 = enable 1 = disable
// <1> 0 AF TX LPF filter 0 = enable 1 = disable
// <0> 0 AF TX pre-emphasis filter 0 = enable 1 = disable
//
// disable the 300Hz HPF and FM pre-emphasis filter
//
const uint16_t filt_val = BK4819_ReadRegister(0x2B);
BK4819_WriteRegister(0x2B, (1u << 2) | (1u << 0));
// *******************************************
// setup the FFSK modem as best we can for MDC1200
// MDC1200 uses 1200/1800 Hz FSK tone frequencies 1200 bits/s
//
BK4819_WriteRegister(0x58, // 0x37C3); // 001 101 11 11 00 001 1
(1u << 13) | // 1 FSK TX mode selection
// 0 = FSK 1.2K and FSK 2.4K TX .. no tones, direct FM
// 1 = FFSK 1200/1800 TX
// 2 = ???
// 3 = FFSK 1200/2400 TX
// 4 = ???
// 5 = NOAA SAME TX
// 6 = ???
// 7 = ???
//
(7u << 10) | // 0 FSK RX mode selection
// 0 = FSK 1.2K, FSK 2.4K RX and NOAA SAME RX .. no tones, direct FM
// 1 = ???
// 2 = ???
// 3 = ???
// 4 = FFSK 1200/2400 RX
// 5 = ???
// 6 = ???
// 7 = FFSK 1200/1800 RX
//
(0u << 8) | // 0 FSK RX gain
// 0 ~ 3
//
(0u << 6) | // 0 ???
// 0 ~ 3
//
(0u << 4) | // 0 FSK preamble type selection
// 0 = 0xAA or 0x55 due to the MSB of FSK sync byte 0
// 1 = ???
// 2 = 0x55
// 3 = 0xAA
//
(1u << 1) | // 1 FSK RX bandwidth setting
// 0 = FSK 1.2K .. no tones, direct FM
// 1 = FFSK 1200/1800
// 2 = NOAA SAME RX
// 3 = ???
// 4 = FSK 2.4K and FFSK 1200/2400
// 5 = ???
// 6 = ???
// 7 = ???
//
(1u << 0)); // 1 FSK enable
// 0 = disable
// 1 = enable
// REG_72
//
// <15:0> 0x2854 TONE-2 / FSK frequency control word
// = freq(Hz) * 10.32444 for XTAL 13M / 26M or
// = freq(Hz) * 10.48576 for XTAL 12.8M / 19.2M / 25.6M / 38.4M
//
// tone-2 = 1200Hz
//
BK4819_WriteRegister(0x72, ((1200u * 103244) + 5000) / 10000); // with rounding
// REG_70
//
// <15> 0 TONE-1
// 1 = enable
// 0 = disable
//
// <14:8> 0 TONE-1 tuning
//
// <7> 0 TONE-2
// 1 = enable
// 0 = disable
//
// <6:0> 0 TONE-2 / FSK tuning
// 0 ~ 127
//
// enable tone-2, set gain
//
BK4819_WriteRegister(0x70, // 0 0000000 1 1100000
( 0u << 15) | // 0
( 0u << 8) | // 0
( 1u << 7) | // 1
(96u << 0)); // 96
// (127u << 0));
// REG_59
//
// <15> 0 TX FIFO 1 = clear
// <14> 0 RX FIFO 1 = clear
// <13> 0 FSK Scramble 1 = Enable
// <12> 0 FSK RX 1 = Enable
// <11> 0 FSK TX 1 = Enable
// <10> 0 FSK data when RX 1 = Invert
// <9> 0 FSK data when TX 1 = Invert
// <8> 0 ???
//
// <7:4> 0 FSK preamble length selection
// 0 = 1 byte
// 1 = 2 bytes
// 2 = 3 bytes
// 15 = 16 bytes
//
// <3> 0 FSK sync length selection
// 0 = 2 bytes (FSK Sync Byte 0, 1)
// 1 = 4 bytes (FSK Sync Byte 0, 1, 2, 3)
//
// <2:0> 0 ???
//
fsk_reg59 = (0u << 15) | // 0/1 1 = clear TX FIFO
(0u << 14) | // 0/1 1 = clear RX FIFO
(0u << 13) | // 0/1 1 = scramble
(0u << 12) | // 0/1 1 = enable RX
(0u << 11) | // 0/1 1 = enable TX
(0u << 10) | // 0/1 1 = invert data when RX
(0u << 9) | // 0/1 1 = invert data when TX
(0u << 8) | // 0/1 ???
(3u << 4) | // 0 ~ 15 preamble length .. bit toggling
(1u << 3) | // 0/1 sync length
(0u << 0); // 0 ~ 7 ???
// Set packet length (not including pre-amble and sync bytes that we can't seem to disable)
BK4819_WriteRegister(0x5D, ((size - 1) << 8));
// REG_5A
//
// <15:8> 0x55 FSK Sync Byte 0 (Sync Byte 0 first, then 1,2,3)
// <7:0> 0x55 FSK Sync Byte 1
//
BK4819_WriteRegister(0x5A, 0x0000); // bytes 1 & 2
// REG_5B
//
// <15:8> 0x55 FSK Sync Byte 2 (Sync Byte 0 first, then 1,2,3)
// <7:0> 0xAA FSK Sync Byte 3
//
BK4819_WriteRegister(0x5B, 0x0000); // bytes 2 & 3
// CRC setting (plus other stuff we don't know what)
//
// REG_5C
//
// <15:7> ???
//
// <6> 1 CRC option enable 0 = disable 1 = enable
//
// <5:0> ???
//
// disable CRC
//
// NB, this also affects TX pre-amble in some way
//
BK4819_WriteRegister(0x5C, 0x5625); // 010101100 0 100101
// BK4819_WriteRegister(0x5C, 0xAA30); // 101010100 0 110000
// BK4819_WriteRegister(0x5C, 0x0030); // 000000000 0 110000
BK4819_WriteRegister(0x59, (1u << 15) | (1u << 14) | fsk_reg59); // clear FIFO's
BK4819_WriteRegister(0x59, fsk_reg59); // release the FIFO reset
{ // load the entire packet data into the TX FIFO buffer
unsigned int i;
const uint16_t *p = (const uint16_t *)packet;
for (i = 0; i < (size / sizeof(p[0])); i++)
BK4819_WriteRegister(0x5F, p[i]); // load 16-bits at a time
}
// enable tx interrupt
BK4819_WriteRegister(0x3F, BK4819_REG_3F_FSK_TX_FINISHED);
// enable FSK TX
BK4819_WriteRegister(0x59, (1u << 11) | fsk_reg59);
{ // packet time is ..
// 173ms for PTT ID, acks, emergency
// 266ms for call alert and sel-calls
// allow up to 310ms for the TX to complete
// if it takes any longer then somethings gone wrong, we shut the TX down
unsigned int timeout = 300 / 4;
while (timeout-- > 0)
{
SYSTEM_DelayMs(4);
if (BK4819_ReadRegister(0x0C) & (1u << 0))
{ // we have interrupt flags
BK4819_WriteRegister(0x02, 0);
if (BK4819_ReadRegister(0x02) & BK4819_REG_02_FSK_TX_FINISHED)
timeout = 0; // TX is complete
}
}
}
GPIO_ClearBit(&GPIOC->DATA, GPIOC_PIN_SPEAKER);
// disable FSK
BK4819_WriteRegister(0x59, fsk_reg59);
BK4819_WriteRegister(0x3F, 0); // disable interrupts
BK4819_WriteRegister(0x70, 0);
BK4819_WriteRegister(0x58, 0);
// restore FM deviation level
BK4819_WriteRegister(0x40, dev_val);
// restore TX/RX filtering
BK4819_WriteRegister(0x2B, filt_val);
// restore the CTCSS/CDCSS setting
BK4819_WriteRegister(0x51, css_val);
//BK4819_EnterTxMute();
BK4819_WriteRegister(0x50, 0xBB20); // 1011 1011 0010 0000
//BK4819_SetAF(BK4819_AF_MUTE);
BK4819_WriteRegister(0x47, (1u << 14) | (1u << 13) | (BK4819_AF_MUTE << 8) | (1u << 6));
BK4819_WriteRegister(0x30,
BK4819_REG_30_ENABLE_VCO_CALIB |
BK4819_REG_30_ENABLE_UNKNOWN |
// BK4819_REG_30_ENABLE_RX_LINK |
// BK4819_REG_30_ENABLE_AF_DAC |
BK4819_REG_30_ENABLE_DISC_MODE |
BK4819_REG_30_ENABLE_PLL_VCO |
BK4819_REG_30_ENABLE_PA_GAIN |
BK4819_REG_30_ENABLE_MIC_ADC |
BK4819_REG_30_ENABLE_TX_DSP |
// BK4819_REG_30_ENABLE_RX_DSP |
0);
//BK4819_ExitTxMute();
BK4819_WriteRegister(0x50, 0x3B20); // 0011 1011 0010 0000
}
#endif
void BK4819_Enable_AfDac_DiscMode_TxDsp(void)
{
BK4819_WriteRegister(0x30, 0);
BK4819_WriteRegister(0x30,
// BK4819_REG_30_ENABLE_VCO_CALIB |
// BK4819_REG_30_ENABLE_UNKNOWN |
// BK4819_REG_30_ENABLE_RX_LINK |
BK4819_REG_30_ENABLE_AF_DAC |
BK4819_REG_30_ENABLE_DISC_MODE |
// BK4819_REG_30_ENABLE_PLL_VCO |
// BK4819_REG_30_ENABLE_PA_GAIN |
// BK4819_REG_30_ENABLE_MIC_ADC |
BK4819_REG_30_ENABLE_TX_DSP |
// BK4819_REG_30_ENABLE_RX_DSP |
0);
}
void BK4819_GetVoxAmp(uint16_t *pResult)
{
*pResult = BK4819_ReadRegister(0x64) & 0x7FFF;
}
void BK4819_SetScrambleFrequencyControlWord(uint32_t Frequency)
{
BK4819_WriteRegister(0x71, scale_freq(Frequency));
}
void BK4819_PlayDTMFEx(bool bLocalLoopback, char Code)
{
BK4819_EnableDTMF();
BK4819_EnterTxMute();
BK4819_SetAF(bLocalLoopback ? BK4819_AF_BEEP : BK4819_AF_MUTE);
BK4819_WriteRegister(0x70, 0xD3D3); // 1101 0011 1101 0011
BK4819_EnableTXLink();
SYSTEM_DelayMs(50);
BK4819_PlayDTMF(Code);
BK4819_ExitTxMute();
}
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