mirror of
https://github.com/OneOfEleven/uv-k5-firmware-custom.git
synced 2025-04-28 22:31:25 +03:00
Moved to lookup table based AM fix
This commit is contained in:
OneOfEleven
parent
d874893a50
commit
2cbaeb7431
241
app/app.c
241
app/app.c
@ -71,12 +71,124 @@ static const uint8_t orig_pga = 6; // -3dB
|
||||
#ifdef ENABLE_AM_FIX
|
||||
// stuff to overcome the AM demodulator saturation problem
|
||||
|
||||
int16_t rssi_db_gain_diff = 0; // holds the compensation value to correct the RSSI reading
|
||||
// REG_10 AGC gain table
|
||||
//
|
||||
// <15:10> ???
|
||||
//
|
||||
// <9:8> = LNA Gain Short
|
||||
// 3 = 0dB < original value
|
||||
// 2 = -11dB
|
||||
// 1 = -16dB
|
||||
// 0 = -19dB
|
||||
//
|
||||
// <7:5> = LNA Gain
|
||||
// 7 = 0dB
|
||||
// 6 = -2dB
|
||||
// 5 = -4dB
|
||||
// 4 = -6dB
|
||||
// 3 = -9dB
|
||||
// 2 = -14dB < original value
|
||||
// 1 = -19dB
|
||||
// 0 = -24dB
|
||||
//
|
||||
// <4:3> = MIXER Gain
|
||||
// 3 = 0dB < original value
|
||||
// 2 = -3dB
|
||||
// 1 = -6dB
|
||||
// 0 = -8dB
|
||||
//
|
||||
// <2:0> = PGA Gain
|
||||
// 7 = 0dB
|
||||
// 6 = -3dB < original value
|
||||
// 5 = -6dB
|
||||
// 4 = -9dB
|
||||
// 3 = -15dB
|
||||
// 2 = -21dB
|
||||
// 1 = -27dB
|
||||
// 0 = -33dB
|
||||
|
||||
static uint8_t am_lna_short = orig_lna_short;
|
||||
static uint8_t am_lna = orig_lna;
|
||||
static uint8_t am_mixer = orig_mixer;
|
||||
static uint8_t am_pga = orig_pga;
|
||||
// front end register dB values
|
||||
static const int8_t lna_short_dB[] = {-19, -16, -11, 0};
|
||||
static const int8_t lna_dB[] = {-24, -19, -14, -9, -6, -4, -2, 0};
|
||||
static const int8_t mixer_dB[] = { -8, -6, -3, 0};
|
||||
static const int8_t pga_dB[] = {-33, -27, -21, -15, -9, -6, -3, 0};
|
||||
|
||||
typedef struct
|
||||
{
|
||||
uint8_t lna_short:2;
|
||||
uint8_t lna:3;
|
||||
uint8_t mixer:2;
|
||||
uint8_t pga:3;
|
||||
// } __attribute__((packed)) t_am_fix_gain_table;
|
||||
} t_am_fix_gain_table;
|
||||
|
||||
static const t_am_fix_gain_table am_fix_gain_table[] =
|
||||
{
|
||||
{.lna_short = 3, .lna = 2, .mixer = 3, .pga = 6}, // 0 0dB -14dB 0dB -3dB .. -17dB original
|
||||
|
||||
{3, 0, 0, 0}, // 1 0dB -24dB -8dB -33dB .. -65dB
|
||||
{3, 0, 1, 0}, // 2 0dB -24dB -6dB -33dB .. -63dB
|
||||
{3, 0, 2, 0}, // 3 0dB -24dB -3dB -33dB .. -60dB
|
||||
{3, 0, 0, 1}, // 4 0dB -24dB -8dB -27dB .. -59dB
|
||||
{3, 1, 1, 0}, // 5 0dB -19dB -6dB -33dB .. -58dB
|
||||
{3, 0, 1, 1}, // 6 0dB -24dB -6dB -27dB .. -57dB
|
||||
{3, 1, 2, 0}, // 7 0dB -19dB -3dB -33dB .. -55dB
|
||||
{3, 1, 0, 1}, // 8 0dB -19dB -8dB -27dB .. -54dB
|
||||
{3, 0, 0, 2}, // 9 0dB -24dB -8dB -21dB .. -53dB
|
||||
{3, 1, 1, 1}, // 10 0dB -19dB -6dB -27dB .. -52dB
|
||||
{3, 0, 1, 2}, // 11 0dB -24dB -6dB -21dB .. -51dB
|
||||
{3, 2, 2, 0}, // 12 0dB -14dB -3dB -33dB .. -50dB
|
||||
{3, 2, 0, 1}, // 13 0dB -14dB -8dB -27dB .. -49dB
|
||||
{3, 0, 2, 2}, // 14 0dB -24dB -3dB -21dB .. -48dB
|
||||
{3, 2, 3, 0}, // 15 0dB -14dB 0dB -33dB .. -47dB
|
||||
{3, 1, 3, 1}, // 16 0dB -19dB 0dB -27dB .. -46dB
|
||||
{3, 0, 3, 2}, // 17 0dB -24dB 0dB -21dB .. -45dB
|
||||
{3, 3, 0, 1}, // 18 0dB -9dB -8dB -27dB .. -44dB
|
||||
{3, 1, 2, 2}, // 19 0dB -19dB -3dB -21dB .. -43dB
|
||||
{3, 0, 2, 3}, // 20 0dB -24dB -3dB -15dB .. -42dB
|
||||
{3, 0, 0, 4}, // 21 0dB -24dB -8dB -9dB .. -41dB
|
||||
{3, 1, 1, 3}, // 22 0dB -19dB -6dB -15dB .. -40dB
|
||||
{3, 0, 1, 4}, // 23 0dB -24dB -6dB -9dB .. -39dB
|
||||
{3, 0, 0, 5}, // 24 0dB -24dB -8dB -6dB .. -38dB
|
||||
{3, 1, 2, 3}, // 25 0dB -19dB -3dB -15dB .. -37dB
|
||||
{3, 0, 2, 4}, // 26 0dB -24dB -3dB -9dB .. -36dB
|
||||
{3, 4, 0, 2}, // 27 0dB -6dB -8dB -21dB .. -35dB
|
||||
{3, 1, 1, 4}, // 28 0dB -19dB -6dB -9dB .. -34dB
|
||||
{3, 1, 0, 5}, // 29 0dB -19dB -8dB -6dB .. -33dB
|
||||
{3, 3, 0, 3}, // 30 0dB -9dB -8dB -15dB .. -32dB
|
||||
{3, 5, 1, 2}, // 31 0dB -4dB -6dB -21dB .. -31dB
|
||||
{3, 1, 0, 6}, // 32 0dB -19dB -8dB -3dB .. -30dB
|
||||
{3, 2, 3, 3}, // 33 0dB -14dB 0dB -15dB .. -29dB
|
||||
{3, 1, 1, 6}, // 34 0dB -19dB -6dB -3dB .. -28dB
|
||||
{3, 4, 1, 3}, // 35 0dB -6dB -6dB -15dB .. -27dB
|
||||
{3, 2, 2, 4}, // 36 0dB -14dB -3dB -9dB .. -26dB
|
||||
{3, 1, 2, 6}, // 37 0dB -19dB -3dB -3dB .. -25dB
|
||||
{3, 3, 1, 4}, // 38 0dB -9dB -6dB -9dB .. -24dB
|
||||
{3, 2, 1, 6}, // 39 0dB -14dB -6dB -3dB .. -23dB
|
||||
{3, 5, 2, 3}, // 40 0dB -4dB -3dB -15dB .. -22dB
|
||||
{3, 4, 1, 4}, // 41 0dB -6dB -6dB -9dB .. -21dB
|
||||
{3, 4, 0, 5}, // 42 0dB -6dB -8dB -6dB .. -20dB
|
||||
{3, 5, 1, 4}, // 43 0dB -4dB -6dB -9dB .. -19dB
|
||||
{3, 3, 3, 4}, // 44 0dB -9dB 0dB -9dB .. -18dB
|
||||
{3, 3, 0, 7}, // 45 0dB -9dB -8dB 0dB .. -17dB
|
||||
{3, 2, 3, 6}, // 46 0dB -14dB 0dB -3dB .. -17dB original
|
||||
{3, 2, 2, 7}, // 47 0dB -14dB -3dB 0dB .. -17dB
|
||||
{3, 5, 1, 5}, // 48 0dB -4dB -6dB -6dB .. -16dB
|
||||
{3, 3, 3, 5}, // 49 0dB -9dB 0dB -6dB .. -15dB
|
||||
{3, 2, 3, 7}, // 50 0dB -14dB 0dB 0dB .. -14dB
|
||||
{3, 5, 1, 6}, // 51 0dB -4dB -6dB -3dB .. -13dB
|
||||
{3, 4, 2, 6}, // 52 0dB -6dB -3dB -3dB .. -12dB
|
||||
{3, 5, 2, 6}, // 53 0dB -4dB -3dB -3dB .. -10dB
|
||||
{3, 4, 3, 6}, // 54 0dB -6dB 0dB -3dB .. -9dB
|
||||
{3, 5, 2, 7}, // 55 0dB -4dB -3dB 0dB .. -7dB
|
||||
{3, 4, 3, 7}, // 56 0dB -6dB 0dB 0dB .. -6dB
|
||||
{3, 5, 3, 7}, // 57 0dB -4dB 0dB 0dB .. -4dB
|
||||
};
|
||||
|
||||
unsigned int am_fix_gain_table_index = 46; // original
|
||||
unsigned int am_fix_gain_table_index_prev = 0;
|
||||
|
||||
int16_t rssi_db_gain_diff = 0; // holds the compensation value to correct the RSSI reading
|
||||
|
||||
// moving average RSSI buffer
|
||||
struct {
|
||||
@ -96,6 +208,9 @@ static const uint8_t orig_pga = 6; // -3dB
|
||||
am_gain_hold_counter = 0;
|
||||
|
||||
rssi_db_gain_diff = 0;
|
||||
|
||||
am_fix_gain_table_index = 46; // original
|
||||
am_fix_gain_table_index_prev = 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
@ -1353,12 +1468,6 @@ void APP_CheckKeys(void)
|
||||
|
||||
#ifdef ENABLE_AM_FIX
|
||||
|
||||
// front end register dB values
|
||||
static const int8_t lna_short_dB[] = {-19, -16, -11, 0};
|
||||
static const int8_t lna_dB[] = {-24, -19, -14, -9, -6, -4, -2, 0};
|
||||
static const int8_t mixer_dB[] = { -8, -6, -3, 0};
|
||||
static const int8_t pga_dB[] = {-33, -27, -21, -15, -9, -6, -3, 0};
|
||||
|
||||
void adjust_AM_frontEnd_10ms(void)
|
||||
{
|
||||
// we don't play with the front end gains if in FM mode
|
||||
@ -1382,49 +1491,9 @@ void APP_CheckKeys(void)
|
||||
break;
|
||||
}
|
||||
|
||||
// REG_10 <15:0> 0x0038 Rx AGC Gain Table
|
||||
//
|
||||
// <9:8> = LNA Gain Short
|
||||
// 3 = 0dB < original value
|
||||
// 2 = -11dB
|
||||
// 1 = -16dB
|
||||
// 0 = -19dB
|
||||
//
|
||||
// <7:5> = LNA Gain
|
||||
// 7 = 0dB
|
||||
// 6 = -2dB
|
||||
// 5 = -4dB
|
||||
// 4 = -6dB
|
||||
// 3 = -9dB
|
||||
// 2 = -14dB < original value
|
||||
// 1 = -19dB
|
||||
// 0 = -24dB
|
||||
//
|
||||
// <4:3> = MIXER Gain
|
||||
// 3 = 0dB < original value
|
||||
// 2 = -3dB
|
||||
// 1 = -6dB
|
||||
// 0 = -8dB
|
||||
//
|
||||
// <2:0> = PGA Gain
|
||||
// 7 = 0dB
|
||||
// 6 = -3dB < original value
|
||||
// 5 = -6dB
|
||||
// 4 = -9dB
|
||||
// 3 = -15dB
|
||||
// 2 = -21dB
|
||||
// 1 = -27dB
|
||||
// 0 = -33dB
|
||||
|
||||
// -87dBm, any higher and the AM demodulator starts to saturate/clip (distort)
|
||||
const uint16_t desired_rssi = (-87 + 160) * 2; // dBm to ADC sample
|
||||
|
||||
// start with the current gain settings
|
||||
uint8_t new_lna_short = am_lna_short;
|
||||
uint8_t new_lna = am_lna;
|
||||
uint8_t new_mixer = am_mixer;
|
||||
uint8_t new_pga = am_pga;
|
||||
|
||||
/*
|
||||
// current RX frequency
|
||||
const uint32_t rx_frequency = gRxVfo->pRX->Frequency;
|
||||
|
||||
@ -1444,7 +1513,7 @@ void APP_CheckKeys(void)
|
||||
max_lna = 7;
|
||||
max_pga = 7;
|
||||
}
|
||||
|
||||
*/
|
||||
// sample the current RSSI level
|
||||
uint16_t rssi = BK4819_GetRSSI(); // 9-bit value (0 .. 511)
|
||||
//gCurrentRSSI = rssi - (rssi_db_gain_diff * 2);
|
||||
@ -1459,32 +1528,11 @@ void APP_CheckKeys(void)
|
||||
moving_avg_rssi.index = 0; //
|
||||
rssi = moving_avg_rssi.sum / moving_avg_rssi.count; // compute the average of the past 'n' samples
|
||||
|
||||
// the register adjustments below need to be a bit more intelligent
|
||||
// in order to maintain a good stable setting
|
||||
|
||||
if (rssi > desired_rssi)
|
||||
{ // decrease gain
|
||||
|
||||
if (new_lna > orig_lna)
|
||||
new_lna--;
|
||||
else
|
||||
if (new_pga > orig_pga)
|
||||
new_pga--;
|
||||
else
|
||||
if (new_mixer > orig_mixer)
|
||||
new_mixer--;
|
||||
else
|
||||
if (new_lna > 0)
|
||||
new_lna--;
|
||||
else
|
||||
if (new_pga > 0)
|
||||
new_pga--;
|
||||
else
|
||||
if (new_mixer > 0)
|
||||
new_mixer--;
|
||||
// else
|
||||
// if (new_lna_short > 0)
|
||||
// new_lna_short--;
|
||||
if (am_fix_gain_table_index > 1)
|
||||
am_fix_gain_table_index--;
|
||||
|
||||
am_gain_hold_counter = 50; // 500ms
|
||||
}
|
||||
@ -1498,51 +1546,32 @@ void APP_CheckKeys(void)
|
||||
if (rssi < (desired_rssi - 10)) // 5dB hysterisis (helps prevent gain hunting)
|
||||
{ // increase gain
|
||||
|
||||
if (new_pga < max_pga)
|
||||
{
|
||||
new_pga++;
|
||||
am_gain_hold_counter = 10; // 100ms
|
||||
}
|
||||
else
|
||||
if (new_mixer < max_mixer)
|
||||
{
|
||||
new_mixer++;
|
||||
am_gain_hold_counter = 10; // 100ms
|
||||
}
|
||||
else
|
||||
if (new_lna < max_lna)
|
||||
{
|
||||
new_lna++;
|
||||
am_gain_hold_counter = 10; // 100ms
|
||||
}
|
||||
// else
|
||||
// if (new_lna_short < max_lna_short)
|
||||
// {
|
||||
// new_lna_short++;
|
||||
// am_gain_hold_counter = 10; // 100ms
|
||||
// }
|
||||
if (am_fix_gain_table_index < (ARRAY_SIZE(am_fix_gain_table) - 1))
|
||||
am_fix_gain_table_index++;
|
||||
}
|
||||
}
|
||||
|
||||
if (am_lna_short == new_lna_short && am_lna == new_lna && am_mixer == new_mixer && am_pga == new_pga)
|
||||
if (am_fix_gain_table_index == am_fix_gain_table_index_prev)
|
||||
return; // no gain changes
|
||||
|
||||
// apply the new gain settings to the front end
|
||||
|
||||
// remember the new gain settings - for the next time this function is called
|
||||
am_lna_short = new_lna_short;
|
||||
am_lna = new_lna;
|
||||
am_mixer = new_mixer;
|
||||
am_pga = new_pga;
|
||||
const uint16_t lna_short = am_fix_gain_table[am_fix_gain_table_index].lna_short;
|
||||
const uint16_t lna = am_fix_gain_table[am_fix_gain_table_index].lna;
|
||||
const uint16_t mixer = am_fix_gain_table[am_fix_gain_table_index].mixer;
|
||||
const uint16_t pga = am_fix_gain_table[am_fix_gain_table_index].pga;
|
||||
|
||||
BK4819_WriteRegister(BK4819_REG_13, ((uint16_t)am_lna_short << 8) | ((uint16_t)am_lna << 5) | ((uint16_t)am_mixer << 3) | ((uint16_t)am_pga << 0));
|
||||
BK4819_WriteRegister(BK4819_REG_13, (lna_short << 8) | (lna << 5) | (mixer << 3) | (pga << 0));
|
||||
|
||||
{ // offset the RSSI reading to the rest of the firmware to cancel out the gain adjustments we've made here
|
||||
static const int16_t orig_dB_gain = lna_short_dB[orig_lna_short & 3u] + lna_dB[orig_lna & 7u] + mixer_dB[orig_mixer & 3u] + pga_dB[orig_pga & 7u];
|
||||
const int16_t am_dB_gain = lna_short_dB[am_lna_short & 3u] + lna_dB[am_lna & 7u] + mixer_dB[am_mixer & 3u] + pga_dB[am_pga & 7u];
|
||||
const int16_t am_dB_gain = lna_short_dB[lna_short & 3u] + lna_dB[lna & 7u] + mixer_dB[mixer & 3u] + pga_dB[pga & 7u];
|
||||
|
||||
rssi_db_gain_diff = am_dB_gain - orig_dB_gain;
|
||||
}
|
||||
|
||||
am_fix_gain_table_index_prev = am_fix_gain_table_index;
|
||||
}
|
||||
#endif
|
||||
|
||||
|
||||
@ -985,7 +985,38 @@ void BK4819_Idle(void)
|
||||
void BK4819_ExitBypass(void)
|
||||
{
|
||||
BK4819_SetAF(BK4819_AF_MUTE);
|
||||
BK4819_WriteRegister(BK4819_REG_7E, 0x302E);
|
||||
|
||||
// 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(BK4819_REG_7E, // 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)
|
||||
|
||||
BIN
firmware.bin
BIN
firmware.bin
Binary file not shown.
Binary file not shown.
Loading…
x
Reference in New Issue
Block a user