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https://github.com/OneOfEleven/uv-k5-firmware-custom.git
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OneOfEleven
231
app/aircopy.c
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231
app/aircopy.c
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/* Copyright 2023 Dual Tachyon
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* https://github.com/DualTachyon
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef DISABLE_AIRCOPY
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#include "app/aircopy.h"
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#include "audio.h"
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#include "driver/bk4819.h"
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#include "driver/crc.h"
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#include "driver/eeprom.h"
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#include "frequencies.h"
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#include "misc.h"
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#include "radio.h"
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#include "ui/helper.h"
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#include "ui/inputbox.h"
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#include "ui/ui.h"
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static const uint16_t Obfuscation[8] = {0x6C16, 0xE614, 0x912E, 0x400D, 0x3521, 0x40D5, 0x0313, 0x80E9};
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AIRCOPY_State_t gAircopyState;
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uint16_t gAirCopyBlockNumber;
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uint16_t gErrorsDuringAirCopy;
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uint8_t gAirCopyIsSendMode;
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uint16_t g_FSK_Buffer[36];
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void AIRCOPY_SendMessage(void)
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{
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unsigned int i;
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g_FSK_Buffer[1] = (gAirCopyBlockNumber & 0x3FF) << 6;
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EEPROM_ReadBuffer(g_FSK_Buffer[1], &g_FSK_Buffer[2], 64);
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g_FSK_Buffer[34] = CRC_Calculate(&g_FSK_Buffer[1], 2 + 64);
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for (i = 0; i < 34; i++)
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g_FSK_Buffer[i + 1] ^= Obfuscation[i % 8];
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if (++gAirCopyBlockNumber >= 0x78)
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gAircopyState = AIRCOPY_COMPLETE;
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RADIO_SetTxParameters();
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BK4819_SendFSKData(g_FSK_Buffer);
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BK4819_SetupPowerAmplifier(0, 0);
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BK4819_ToggleGpioOut(BK4819_GPIO5_PIN1, false);
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gAircopySendCountdown = 30;
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}
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void AIRCOPY_StorePacket(void)
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{
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uint16_t Status;
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if (gFSKWriteIndex < 36)
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return;
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gFSKWriteIndex = 0;
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gUpdateDisplay = true;
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Status = BK4819_ReadRegister(BK4819_REG_0B);
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BK4819_PrepareFSKReceive();
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// Doc says bit 4 should be 1 = CRC OK, 0 = CRC FAIL, but original firmware checks for FAIL.
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if ((Status & 0x0010U) == 0 && g_FSK_Buffer[0] == 0xABCD && g_FSK_Buffer[35] == 0xDCBA)
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{
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uint16_t CRC;
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unsigned int i;
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for (i = 0; i < 34; i++)
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g_FSK_Buffer[i + 1] ^= Obfuscation[i % 8];
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CRC = CRC_Calculate(&g_FSK_Buffer[1], 2 + 64);
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if (g_FSK_Buffer[34] == CRC)
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{
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const uint16_t *pData;
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uint16_t Offset;
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Offset = g_FSK_Buffer[1];
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if (Offset < 0x1E00)
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{
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pData = &g_FSK_Buffer[2];
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for (i = 0; i < 8; i++)
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{
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EEPROM_WriteBuffer(Offset, pData);
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pData += 4;
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Offset += 8;
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}
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if (Offset == 0x1E00)
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gAircopyState = AIRCOPY_COMPLETE;
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gAirCopyBlockNumber++;
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return;
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}
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}
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}
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gErrorsDuringAirCopy++;
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}
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static void AIRCOPY_Key_DIGITS(KEY_Code_t Key, bool bKeyPressed, bool bKeyHeld)
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{
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if (!bKeyHeld && bKeyPressed)
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{
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uint32_t Frequency;
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unsigned int i;
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INPUTBOX_Append(Key);
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gRequestDisplayScreen = DISPLAY_AIRCOPY;
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if (gInputBoxIndex < 6)
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{
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#ifndef DISABLE_VOICE
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gAnotherVoiceID = (VOICE_ID_t)Key;
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#endif
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return;
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}
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gInputBoxIndex = 0;
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NUMBER_Get(gInputBox, &Frequency);
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for (i = 0; i < 7; i++)
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{
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if (Frequency >= gLowerLimitFrequencyBandTable[i] && Frequency <= gUpperLimitFrequencyBandTable[i])
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{
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#ifndef DISABLE_VOICE
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gAnotherVoiceID = (VOICE_ID_t)Key;
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#endif
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gRxVfo->Band = i;
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Frequency += 75;
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Frequency = FREQUENCY_FloorToStep(Frequency, gRxVfo->StepFrequency, 0);
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gRxVfo->ConfigRX.Frequency = Frequency;
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gRxVfo->ConfigTX.Frequency = Frequency;
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RADIO_ConfigureSquelchAndOutputPower(gRxVfo);
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gCurrentVfo = gRxVfo;
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RADIO_SetupRegisters(true);
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BK4819_SetupAircopy();
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BK4819_ResetFSK();
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return;
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}
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}
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gRequestDisplayScreen = DISPLAY_AIRCOPY;
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}
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}
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static void AIRCOPY_Key_EXIT(bool bKeyPressed, bool bKeyHeld)
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{
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if (!bKeyHeld && bKeyPressed)
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{
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if (gInputBoxIndex == 0)
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{
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gFSKWriteIndex = 0;
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gAirCopyBlockNumber = 0;
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gErrorsDuringAirCopy = 0;
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gInputBoxIndex = 0;
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gAirCopyIsSendMode = 0;
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BK4819_PrepareFSKReceive();
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gAircopyState = AIRCOPY_TRANSFER;
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}
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else
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gInputBox[--gInputBoxIndex] = 10;
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gRequestDisplayScreen = DISPLAY_AIRCOPY;
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}
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}
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static void AIRCOPY_Key_MENU(bool bKeyPressed, bool bKeyHeld)
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{
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if (!bKeyHeld && bKeyPressed)
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{
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gFSKWriteIndex = 0;
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gAirCopyBlockNumber = 0;
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gInputBoxIndex = 0;
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gAirCopyIsSendMode = 1;
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g_FSK_Buffer[0] = 0xABCD;
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g_FSK_Buffer[1] = 0;
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g_FSK_Buffer[35] = 0xDCBA;
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AIRCOPY_SendMessage();
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GUI_DisplayScreen();
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gAircopyState = AIRCOPY_TRANSFER;
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}
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}
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void AIRCOPY_ProcessKeys(KEY_Code_t Key, bool bKeyPressed, bool bKeyHeld)
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{
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switch (Key)
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{
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case KEY_0:
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case KEY_1:
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case KEY_2:
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case KEY_3:
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case KEY_4:
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case KEY_5:
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case KEY_6:
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case KEY_7:
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case KEY_8:
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case KEY_9:
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AIRCOPY_Key_DIGITS(Key, bKeyPressed, bKeyHeld);
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break;
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case KEY_MENU:
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AIRCOPY_Key_MENU(bKeyPressed, bKeyHeld);
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break;
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case KEY_EXIT:
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AIRCOPY_Key_EXIT(bKeyPressed, bKeyHeld);
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break;
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default:
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break;
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}
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}
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#endif
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