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unleashed-firmware/firmware/targets/f7/furi_hal/furi_hal_subghz.c
MX 53e60cc8e8
subghz frequency range updates
2022-08-03 00:32:55 +03:00

713 lines
26 KiB
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#include "furi_hal_subghz.h"
#include "furi_hal_subghz_configs.h"
#include <furi_hal_version.h>
#include <furi_hal_rtc.h>
#include <furi_hal_gpio.h>
#include <furi_hal_spi.h>
#include <furi_hal_interrupt.h>
#include <furi_hal_resources.h>
#include <stm32wbxx_ll_dma.h>
#include <lib/flipper_format/flipper_format.h>
#include <furi.h>
#include <cc1101.h>
#include <stdio.h>
#define TAG "FuriHalSubGhz"
typedef struct {
volatile SubGhzState state;
volatile SubGhzRegulation regulation;
volatile FuriHalSubGhzPreset preset;
} FuriHalSubGhz;
volatile FuriHalSubGhz furi_hal_subghz = {
.state = SubGhzStateInit,
.regulation = SubGhzRegulationTxRx,
.preset = FuriHalSubGhzPresetIDLE,
};
void furi_hal_subghz_init() {
furi_assert(furi_hal_subghz.state == SubGhzStateInit);
furi_hal_subghz.state = SubGhzStateIdle;
furi_hal_subghz.preset = FuriHalSubGhzPresetIDLE;
furi_hal_spi_acquire(&furi_hal_spi_bus_handle_subghz);
#ifdef FURI_HAL_SUBGHZ_TX_GPIO
furi_hal_gpio_init(&FURI_HAL_SUBGHZ_TX_GPIO, GpioModeOutputPushPull, GpioPullNo, GpioSpeedLow);
#endif
// Reset
furi_hal_gpio_init(&gpio_cc1101_g0, GpioModeAnalog, GpioPullNo, GpioSpeedLow);
cc1101_reset(&furi_hal_spi_bus_handle_subghz);
cc1101_write_reg(&furi_hal_spi_bus_handle_subghz, CC1101_IOCFG0, CC1101IocfgHighImpedance);
// Prepare GD0 for power on self test
furi_hal_gpio_init(&gpio_cc1101_g0, GpioModeInput, GpioPullNo, GpioSpeedLow);
// GD0 low
cc1101_write_reg(&furi_hal_spi_bus_handle_subghz, CC1101_IOCFG0, CC1101IocfgHW);
while(furi_hal_gpio_read(&gpio_cc1101_g0) != false)
;
// GD0 high
cc1101_write_reg(
&furi_hal_spi_bus_handle_subghz, CC1101_IOCFG0, CC1101IocfgHW | CC1101_IOCFG_INV);
while(furi_hal_gpio_read(&gpio_cc1101_g0) != true)
;
// Reset GD0 to floating state
cc1101_write_reg(&furi_hal_spi_bus_handle_subghz, CC1101_IOCFG0, CC1101IocfgHighImpedance);
furi_hal_gpio_init(&gpio_cc1101_g0, GpioModeAnalog, GpioPullNo, GpioSpeedLow);
// RF switches
furi_hal_gpio_init(&gpio_rf_sw_0, GpioModeOutputPushPull, GpioPullNo, GpioSpeedLow);
cc1101_write_reg(&furi_hal_spi_bus_handle_subghz, CC1101_IOCFG2, CC1101IocfgHW);
// Go to sleep
cc1101_shutdown(&furi_hal_spi_bus_handle_subghz);
furi_hal_spi_release(&furi_hal_spi_bus_handle_subghz);
FURI_LOG_I(TAG, "Init OK");
}
void furi_hal_subghz_sleep() {
furi_assert(furi_hal_subghz.state == SubGhzStateIdle);
furi_hal_spi_acquire(&furi_hal_spi_bus_handle_subghz);
cc1101_switch_to_idle(&furi_hal_spi_bus_handle_subghz);
cc1101_write_reg(&furi_hal_spi_bus_handle_subghz, CC1101_IOCFG0, CC1101IocfgHighImpedance);
furi_hal_gpio_init(&gpio_cc1101_g0, GpioModeAnalog, GpioPullNo, GpioSpeedLow);
cc1101_shutdown(&furi_hal_spi_bus_handle_subghz);
furi_hal_spi_release(&furi_hal_spi_bus_handle_subghz);
furi_hal_subghz.preset = FuriHalSubGhzPresetIDLE;
}
void furi_hal_subghz_dump_state() {
furi_hal_spi_acquire(&furi_hal_spi_bus_handle_subghz);
printf(
"[furi_hal_subghz] cc1101 chip %d, version %d\r\n",
cc1101_get_partnumber(&furi_hal_spi_bus_handle_subghz),
cc1101_get_version(&furi_hal_spi_bus_handle_subghz));
furi_hal_spi_release(&furi_hal_spi_bus_handle_subghz);
}
void furi_hal_subghz_load_preset(FuriHalSubGhzPreset preset) {
if(preset == FuriHalSubGhzPresetOok650Async) {
furi_hal_subghz_load_registers((uint8_t*)furi_hal_subghz_preset_ook_650khz_async_regs);
furi_hal_subghz_load_patable(furi_hal_subghz_preset_ook_async_patable);
} else if(preset == FuriHalSubGhzPresetOok270Async) {
furi_hal_subghz_load_registers((uint8_t*)furi_hal_subghz_preset_ook_270khz_async_regs);
furi_hal_subghz_load_patable(furi_hal_subghz_preset_ook_async_patable);
} else if(preset == FuriHalSubGhzPreset2FSKDev238Async) {
furi_hal_subghz_load_registers(
(uint8_t*)furi_hal_subghz_preset_2fsk_dev2_38khz_async_regs);
furi_hal_subghz_load_patable(furi_hal_subghz_preset_2fsk_async_patable);
} else if(preset == FuriHalSubGhzPreset2FSKDev476Async) {
furi_hal_subghz_load_registers(
(uint8_t*)furi_hal_subghz_preset_2fsk_dev47_6khz_async_regs);
furi_hal_subghz_load_patable(furi_hal_subghz_preset_2fsk_async_patable);
} else if(preset == FuriHalSubGhzPresetMSK99_97KbAsync) {
furi_hal_subghz_load_registers((uint8_t*)furi_hal_subghz_preset_msk_99_97kb_async_regs);
furi_hal_subghz_load_patable(furi_hal_subghz_preset_msk_async_patable);
} else if(preset == FuriHalSubGhzPresetGFSK9_99KbAsync) {
furi_hal_subghz_load_registers((uint8_t*)furi_hal_subghz_preset_gfsk_9_99kb_async_regs);
furi_hal_subghz_load_patable(furi_hal_subghz_preset_gfsk_async_patable);
} else {
furi_crash("SubGhz: Missing config.");
}
furi_hal_subghz.preset = preset;
}
void furi_hal_subghz_load_custom_preset(uint8_t* preset_data) {
//load config
furi_hal_spi_acquire(&furi_hal_spi_bus_handle_subghz);
cc1101_reset(&furi_hal_spi_bus_handle_subghz);
uint32_t i = 0;
uint8_t pa[8] = {0};
while(preset_data[i]) {
cc1101_write_reg(&furi_hal_spi_bus_handle_subghz, preset_data[i], preset_data[i + 1]);
i += 2;
}
furi_hal_spi_release(&furi_hal_spi_bus_handle_subghz);
//load pa table
memcpy(&pa[0], &preset_data[i + 2], 8);
furi_hal_subghz_load_patable(pa);
furi_hal_subghz.preset = FuriHalSubGhzPresetCustom;
//show debug
if(furi_hal_rtc_is_flag_set(FuriHalRtcFlagDebug)) {
i = 0;
FURI_LOG_D(TAG, "Loading custom preset");
while(preset_data[i]) {
FURI_LOG_D(TAG, "Reg[%lu]: %02X=%02X", i, preset_data[i], preset_data[i + 1]);
i += 2;
}
for(uint8_t y = i; y < i + 10; y++) {
FURI_LOG_D(TAG, "PA[%lu]: %02X", y, preset_data[y]);
}
}
}
void furi_hal_subghz_load_registers(uint8_t* data) {
furi_hal_spi_acquire(&furi_hal_spi_bus_handle_subghz);
cc1101_reset(&furi_hal_spi_bus_handle_subghz);
uint32_t i = 0;
while(data[i]) {
cc1101_write_reg(&furi_hal_spi_bus_handle_subghz, data[i], data[i + 1]);
i += 2;
}
furi_hal_spi_release(&furi_hal_spi_bus_handle_subghz);
}
void furi_hal_subghz_load_patable(const uint8_t data[8]) {
furi_hal_spi_acquire(&furi_hal_spi_bus_handle_subghz);
cc1101_set_pa_table(&furi_hal_spi_bus_handle_subghz, data);
furi_hal_spi_release(&furi_hal_spi_bus_handle_subghz);
}
void furi_hal_subghz_write_packet(const uint8_t* data, uint8_t size) {
furi_hal_spi_acquire(&furi_hal_spi_bus_handle_subghz);
cc1101_flush_tx(&furi_hal_spi_bus_handle_subghz);
cc1101_write_reg(&furi_hal_spi_bus_handle_subghz, CC1101_FIFO, size);
cc1101_write_fifo(&furi_hal_spi_bus_handle_subghz, data, size);
furi_hal_spi_release(&furi_hal_spi_bus_handle_subghz);
}
void furi_hal_subghz_flush_rx() {
furi_hal_spi_acquire(&furi_hal_spi_bus_handle_subghz);
cc1101_flush_rx(&furi_hal_spi_bus_handle_subghz);
furi_hal_spi_release(&furi_hal_spi_bus_handle_subghz);
}
void furi_hal_subghz_flush_tx() {
furi_hal_spi_acquire(&furi_hal_spi_bus_handle_subghz);
cc1101_flush_tx(&furi_hal_spi_bus_handle_subghz);
furi_hal_spi_release(&furi_hal_spi_bus_handle_subghz);
}
bool furi_hal_subghz_rx_pipe_not_empty() {
CC1101RxBytes status[1];
furi_hal_spi_acquire(&furi_hal_spi_bus_handle_subghz);
cc1101_read_reg(
&furi_hal_spi_bus_handle_subghz, (CC1101_STATUS_RXBYTES) | CC1101_BURST, (uint8_t*)status);
furi_hal_spi_release(&furi_hal_spi_bus_handle_subghz);
// TODO: you can add a buffer overflow flag if needed
if(status->NUM_RXBYTES > 0) {
return true;
} else {
return false;
}
}
bool furi_hal_subghz_is_rx_data_crc_valid() {
furi_hal_spi_acquire(&furi_hal_spi_bus_handle_subghz);
uint8_t data[1];
cc1101_read_reg(&furi_hal_spi_bus_handle_subghz, CC1101_STATUS_LQI | CC1101_BURST, data);
furi_hal_spi_release(&furi_hal_spi_bus_handle_subghz);
if(((data[0] >> 7) & 0x01)) {
return true;
} else {
return false;
}
}
void furi_hal_subghz_read_packet(uint8_t* data, uint8_t* size) {
furi_hal_spi_acquire(&furi_hal_spi_bus_handle_subghz);
cc1101_read_fifo(&furi_hal_spi_bus_handle_subghz, data, size);
furi_hal_spi_release(&furi_hal_spi_bus_handle_subghz);
}
void furi_hal_subghz_shutdown() {
furi_hal_spi_acquire(&furi_hal_spi_bus_handle_subghz);
// Reset and shutdown
cc1101_shutdown(&furi_hal_spi_bus_handle_subghz);
furi_hal_spi_release(&furi_hal_spi_bus_handle_subghz);
}
void furi_hal_subghz_reset() {
furi_hal_spi_acquire(&furi_hal_spi_bus_handle_subghz);
furi_hal_gpio_init(&gpio_cc1101_g0, GpioModeAnalog, GpioPullNo, GpioSpeedLow);
cc1101_switch_to_idle(&furi_hal_spi_bus_handle_subghz);
cc1101_reset(&furi_hal_spi_bus_handle_subghz);
cc1101_write_reg(&furi_hal_spi_bus_handle_subghz, CC1101_IOCFG0, CC1101IocfgHighImpedance);
furi_hal_spi_release(&furi_hal_spi_bus_handle_subghz);
}
void furi_hal_subghz_idle() {
furi_hal_spi_acquire(&furi_hal_spi_bus_handle_subghz);
cc1101_switch_to_idle(&furi_hal_spi_bus_handle_subghz);
furi_hal_spi_release(&furi_hal_spi_bus_handle_subghz);
}
void furi_hal_subghz_rx() {
furi_hal_spi_acquire(&furi_hal_spi_bus_handle_subghz);
cc1101_switch_to_rx(&furi_hal_spi_bus_handle_subghz);
furi_hal_spi_release(&furi_hal_spi_bus_handle_subghz);
}
bool furi_hal_subghz_tx() {
if(furi_hal_subghz.regulation != SubGhzRegulationTxRx) return false;
furi_hal_spi_acquire(&furi_hal_spi_bus_handle_subghz);
cc1101_switch_to_tx(&furi_hal_spi_bus_handle_subghz);
furi_hal_spi_release(&furi_hal_spi_bus_handle_subghz);
return true;
}
float furi_hal_subghz_get_rssi() {
furi_hal_spi_acquire(&furi_hal_spi_bus_handle_subghz);
int32_t rssi_dec = cc1101_get_rssi(&furi_hal_spi_bus_handle_subghz);
furi_hal_spi_release(&furi_hal_spi_bus_handle_subghz);
float rssi = rssi_dec;
if(rssi_dec >= 128) {
rssi = ((rssi - 256.0f) / 2.0f) - 74.0f;
} else {
rssi = (rssi / 2.0f) - 74.0f;
}
return rssi;
}
uint8_t furi_hal_subghz_get_lqi() {
furi_hal_spi_acquire(&furi_hal_spi_bus_handle_subghz);
uint8_t data[1];
cc1101_read_reg(&furi_hal_spi_bus_handle_subghz, CC1101_STATUS_LQI | CC1101_BURST, data);
furi_hal_spi_release(&furi_hal_spi_bus_handle_subghz);
return data[0] & 0x7F;
}
/*
Modified by @tkerby & MX to the full YARD Stick One extended range of 281-361 MHz, 378-481 MHz, and 749-962 MHz.
These changes are at your own risk. The PLL may not lock and FZ devs have warned of possible damage!
*/
bool furi_hal_subghz_is_frequency_valid(uint32_t value) {
if(!(value >= 281000000 && value <= 361000000) &&
!(value >= 378000000 && value <= 481000000) &&
!(value >= 749000000 && value <= 962000000)) {
return false;
}
return true;
}
uint32_t furi_hal_subghz_set_frequency_and_path(uint32_t value) {
// Set these values to the extended frequency range only. They dont define if you can transmit but do select the correct RF path
value = furi_hal_subghz_set_frequency(value);
if(value >= 281000000 && value <= 361000000) {
furi_hal_subghz_set_path(FuriHalSubGhzPath315);
} else if(value >= 378000000 && value <= 481000000) {
furi_hal_subghz_set_path(FuriHalSubGhzPath433);
} else if(value >= 749000000 && value <= 962000000) {
furi_hal_subghz_set_path(FuriHalSubGhzPath868);
} else {
furi_crash("SubGhz: Incorrect frequency during set.");
}
return value;
}
bool furi_hal_subghz_is_tx_allowed(uint32_t value) {
bool is_extended = false;
// TODO: !!! Move file check to another place
Storage* storage = furi_record_open("storage");
FlipperFormat* fff_data_file = flipper_format_file_alloc(storage);
if(flipper_format_file_open_existing(fff_data_file, "/ext/subghz/assets/dangerous_settings")) {
flipper_format_read_bool(
fff_data_file, "yes_i_want_to_destroy_my_flipper", &is_extended, 1);
}
flipper_format_free(fff_data_file);
furi_record_close("storage");
if(!(value >= 299999755 && value <= 348000335) &&
!(value >= 386999938 && value <= 464000000) &&
!(value >= 778999847 && value <= 928000000) && !(is_extended)) {
FURI_LOG_I(TAG, "Frequency blocked - outside default range");
return false;
} else if(
!(value >= 281000000 && value <= 361000000) &&
!(value >= 378000000 && value <= 481000000) &&
!(value >= 749000000 && value <= 962000000) && is_extended) {
FURI_LOG_I(TAG, "Frequency blocked - outside dangerous range");
return false;
}
return true;
}
uint32_t furi_hal_subghz_set_frequency(uint32_t value) {
furi_hal_subghz.regulation = SubGhzRegulationTxRx;
furi_hal_spi_acquire(&furi_hal_spi_bus_handle_subghz);
uint32_t real_frequency = cc1101_set_frequency(&furi_hal_spi_bus_handle_subghz, value);
cc1101_calibrate(&furi_hal_spi_bus_handle_subghz);
while(true) {
CC1101Status status = cc1101_get_status(&furi_hal_spi_bus_handle_subghz);
if(status.STATE == CC1101StateIDLE) break;
}
furi_hal_spi_release(&furi_hal_spi_bus_handle_subghz);
return real_frequency;
}
void furi_hal_subghz_set_path(FuriHalSubGhzPath path) {
furi_hal_spi_acquire(&furi_hal_spi_bus_handle_subghz);
if(path == FuriHalSubGhzPath433) {
furi_hal_gpio_write(&gpio_rf_sw_0, 0);
cc1101_write_reg(
&furi_hal_spi_bus_handle_subghz, CC1101_IOCFG2, CC1101IocfgHW | CC1101_IOCFG_INV);
} else if(path == FuriHalSubGhzPath315) {
furi_hal_gpio_write(&gpio_rf_sw_0, 1);
cc1101_write_reg(&furi_hal_spi_bus_handle_subghz, CC1101_IOCFG2, CC1101IocfgHW);
} else if(path == FuriHalSubGhzPath868) {
furi_hal_gpio_write(&gpio_rf_sw_0, 1);
cc1101_write_reg(
&furi_hal_spi_bus_handle_subghz, CC1101_IOCFG2, CC1101IocfgHW | CC1101_IOCFG_INV);
} else if(path == FuriHalSubGhzPathIsolate) {
furi_hal_gpio_write(&gpio_rf_sw_0, 0);
cc1101_write_reg(&furi_hal_spi_bus_handle_subghz, CC1101_IOCFG2, CC1101IocfgHW);
} else {
furi_crash("SubGhz: Incorrect path during set.");
}
furi_hal_spi_release(&furi_hal_spi_bus_handle_subghz);
}
volatile uint32_t furi_hal_subghz_capture_delta_duration = 0;
volatile FuriHalSubGhzCaptureCallback furi_hal_subghz_capture_callback = NULL;
volatile void* furi_hal_subghz_capture_callback_context = NULL;
static void furi_hal_subghz_capture_ISR() {
// Channel 1
if(LL_TIM_IsActiveFlag_CC1(TIM2)) {
LL_TIM_ClearFlag_CC1(TIM2);
furi_hal_subghz_capture_delta_duration = LL_TIM_IC_GetCaptureCH1(TIM2);
if(furi_hal_subghz_capture_callback) {
furi_hal_subghz_capture_callback(
true,
furi_hal_subghz_capture_delta_duration,
(void*)furi_hal_subghz_capture_callback_context);
}
}
// Channel 2
if(LL_TIM_IsActiveFlag_CC2(TIM2)) {
LL_TIM_ClearFlag_CC2(TIM2);
if(furi_hal_subghz_capture_callback) {
furi_hal_subghz_capture_callback(
false,
LL_TIM_IC_GetCaptureCH2(TIM2) - furi_hal_subghz_capture_delta_duration,
(void*)furi_hal_subghz_capture_callback_context);
}
}
}
void furi_hal_subghz_start_async_rx(FuriHalSubGhzCaptureCallback callback, void* context) {
furi_assert(furi_hal_subghz.state == SubGhzStateIdle);
furi_hal_subghz.state = SubGhzStateAsyncRx;
furi_hal_subghz_capture_callback = callback;
furi_hal_subghz_capture_callback_context = context;
furi_hal_gpio_init_ex(
&gpio_cc1101_g0, GpioModeAltFunctionPushPull, GpioPullNo, GpioSpeedLow, GpioAltFn1TIM2);
// Timer: base
LL_TIM_InitTypeDef TIM_InitStruct = {0};
TIM_InitStruct.Prescaler = 64 - 1;
TIM_InitStruct.CounterMode = LL_TIM_COUNTERMODE_UP;
TIM_InitStruct.Autoreload = 0x7FFFFFFE;
TIM_InitStruct.ClockDivision = LL_TIM_CLOCKDIVISION_DIV4;
LL_TIM_Init(TIM2, &TIM_InitStruct);
// Timer: advanced
LL_TIM_SetClockSource(TIM2, LL_TIM_CLOCKSOURCE_INTERNAL);
LL_TIM_DisableARRPreload(TIM2);
LL_TIM_SetTriggerInput(TIM2, LL_TIM_TS_TI2FP2);
LL_TIM_SetSlaveMode(TIM2, LL_TIM_SLAVEMODE_RESET);
LL_TIM_SetTriggerOutput(TIM2, LL_TIM_TRGO_RESET);
LL_TIM_EnableMasterSlaveMode(TIM2);
LL_TIM_DisableDMAReq_TRIG(TIM2);
LL_TIM_DisableIT_TRIG(TIM2);
// Timer: channel 1 indirect
LL_TIM_IC_SetActiveInput(TIM2, LL_TIM_CHANNEL_CH1, LL_TIM_ACTIVEINPUT_INDIRECTTI);
LL_TIM_IC_SetPrescaler(TIM2, LL_TIM_CHANNEL_CH1, LL_TIM_ICPSC_DIV1);
LL_TIM_IC_SetPolarity(TIM2, LL_TIM_CHANNEL_CH1, LL_TIM_IC_POLARITY_FALLING);
LL_TIM_IC_SetFilter(TIM2, LL_TIM_CHANNEL_CH1, LL_TIM_IC_FILTER_FDIV1);
// Timer: channel 2 direct
LL_TIM_IC_SetActiveInput(TIM2, LL_TIM_CHANNEL_CH2, LL_TIM_ACTIVEINPUT_DIRECTTI);
LL_TIM_IC_SetPrescaler(TIM2, LL_TIM_CHANNEL_CH2, LL_TIM_ICPSC_DIV1);
LL_TIM_IC_SetPolarity(TIM2, LL_TIM_CHANNEL_CH2, LL_TIM_IC_POLARITY_RISING);
LL_TIM_IC_SetFilter(TIM2, LL_TIM_CHANNEL_CH2, LL_TIM_IC_FILTER_FDIV32_N8);
// ISR setup
furi_hal_interrupt_set_isr(FuriHalInterruptIdTIM2, furi_hal_subghz_capture_ISR, NULL);
// Interrupts and channels
LL_TIM_EnableIT_CC1(TIM2);
LL_TIM_EnableIT_CC2(TIM2);
LL_TIM_CC_EnableChannel(TIM2, LL_TIM_CHANNEL_CH1);
LL_TIM_CC_EnableChannel(TIM2, LL_TIM_CHANNEL_CH2);
// Start timer
LL_TIM_SetCounter(TIM2, 0);
LL_TIM_EnableCounter(TIM2);
// Switch to RX
furi_hal_subghz_rx();
}
void furi_hal_subghz_stop_async_rx() {
furi_assert(furi_hal_subghz.state == SubGhzStateAsyncRx);
furi_hal_subghz.state = SubGhzStateIdle;
// Shutdown radio
furi_hal_subghz_idle();
FURI_CRITICAL_ENTER();
LL_TIM_DeInit(TIM2);
FURI_CRITICAL_EXIT();
furi_hal_interrupt_set_isr(FuriHalInterruptIdTIM2, NULL, NULL);
furi_hal_gpio_init(&gpio_cc1101_g0, GpioModeAnalog, GpioPullNo, GpioSpeedLow);
}
#define API_HAL_SUBGHZ_ASYNC_TX_BUFFER_FULL (256)
#define API_HAL_SUBGHZ_ASYNC_TX_BUFFER_HALF (API_HAL_SUBGHZ_ASYNC_TX_BUFFER_FULL / 2)
#define API_HAL_SUBGHZ_ASYNC_TX_GUARD_TIME 333
typedef struct {
uint32_t* buffer;
bool flip_flop;
FuriHalSubGhzAsyncTxCallback callback;
void* callback_context;
uint64_t duty_high;
uint64_t duty_low;
} FuriHalSubGhzAsyncTx;
static FuriHalSubGhzAsyncTx furi_hal_subghz_async_tx = {0};
static void furi_hal_subghz_async_tx_refill(uint32_t* buffer, size_t samples) {
while(samples > 0) {
bool is_odd = samples % 2;
LevelDuration ld =
furi_hal_subghz_async_tx.callback(furi_hal_subghz_async_tx.callback_context);
if(level_duration_is_wait(ld)) {
return;
} else if(level_duration_is_reset(ld)) {
// One more even sample required to end at low level
if(is_odd) {
*buffer = API_HAL_SUBGHZ_ASYNC_TX_GUARD_TIME;
buffer++;
samples--;
furi_hal_subghz_async_tx.duty_low += API_HAL_SUBGHZ_ASYNC_TX_GUARD_TIME;
}
break;
} else {
// Inject guard time if level is incorrect
bool level = level_duration_get_level(ld);
if(is_odd == level) {
*buffer = API_HAL_SUBGHZ_ASYNC_TX_GUARD_TIME;
buffer++;
samples--;
if(!level) {
furi_hal_subghz_async_tx.duty_high += API_HAL_SUBGHZ_ASYNC_TX_GUARD_TIME;
} else {
furi_hal_subghz_async_tx.duty_low += API_HAL_SUBGHZ_ASYNC_TX_GUARD_TIME;
}
// This code must be invoked only once: when encoder starts with low level.
// Otherwise whole thing will crash.
furi_check(samples > 0);
}
uint32_t duration = level_duration_get_duration(ld);
furi_assert(duration > 0);
*buffer = duration;
buffer++;
samples--;
if(level) {
furi_hal_subghz_async_tx.duty_high += duration;
} else {
furi_hal_subghz_async_tx.duty_low += duration;
}
}
}
memset(buffer, 0, samples * sizeof(uint32_t));
}
static void furi_hal_subghz_async_tx_dma_isr() {
furi_assert(
furi_hal_subghz.state == SubGhzStateAsyncTx ||
furi_hal_subghz.state == SubGhzStateAsyncTxEnd ||
furi_hal_subghz.state == SubGhzStateAsyncTxLast);
if(LL_DMA_IsActiveFlag_HT1(DMA1)) {
LL_DMA_ClearFlag_HT1(DMA1);
furi_hal_subghz_async_tx_refill(
furi_hal_subghz_async_tx.buffer, API_HAL_SUBGHZ_ASYNC_TX_BUFFER_HALF);
}
if(LL_DMA_IsActiveFlag_TC1(DMA1)) {
LL_DMA_ClearFlag_TC1(DMA1);
furi_hal_subghz_async_tx_refill(
furi_hal_subghz_async_tx.buffer + API_HAL_SUBGHZ_ASYNC_TX_BUFFER_HALF,
API_HAL_SUBGHZ_ASYNC_TX_BUFFER_HALF);
}
}
static void furi_hal_subghz_async_tx_timer_isr() {
if(LL_TIM_IsActiveFlag_UPDATE(TIM2)) {
LL_TIM_ClearFlag_UPDATE(TIM2);
if(LL_TIM_GetAutoReload(TIM2) == 0) {
if(furi_hal_subghz.state == SubGhzStateAsyncTx) {
furi_hal_subghz.state = SubGhzStateAsyncTxLast;
//forcibly pulls the pin to the ground so that there is no carrier
furi_hal_gpio_init(&gpio_cc1101_g0, GpioModeInput, GpioPullDown, GpioSpeedLow);
} else {
furi_hal_subghz.state = SubGhzStateAsyncTxEnd;
LL_TIM_DisableCounter(TIM2);
}
}
}
}
bool furi_hal_subghz_start_async_tx(FuriHalSubGhzAsyncTxCallback callback, void* context) {
furi_assert(furi_hal_subghz.state == SubGhzStateIdle);
furi_assert(callback);
//If transmission is prohibited by regional settings
if(furi_hal_subghz.regulation != SubGhzRegulationTxRx) return false;
furi_hal_subghz_async_tx.callback = callback;
furi_hal_subghz_async_tx.callback_context = context;
furi_hal_subghz.state = SubGhzStateAsyncTx;
furi_hal_subghz_async_tx.duty_low = 0;
furi_hal_subghz_async_tx.duty_high = 0;
furi_hal_subghz_async_tx.buffer =
malloc(API_HAL_SUBGHZ_ASYNC_TX_BUFFER_FULL * sizeof(uint32_t));
furi_hal_subghz_async_tx_refill(
furi_hal_subghz_async_tx.buffer, API_HAL_SUBGHZ_ASYNC_TX_BUFFER_FULL);
// Connect CC1101_GD0 to TIM2 as output
furi_hal_gpio_init_ex(
&gpio_cc1101_g0, GpioModeAltFunctionPushPull, GpioPullDown, GpioSpeedLow, GpioAltFn1TIM2);
// Configure DMA
LL_DMA_InitTypeDef dma_config = {0};
dma_config.PeriphOrM2MSrcAddress = (uint32_t) & (TIM2->ARR);
dma_config.MemoryOrM2MDstAddress = (uint32_t)furi_hal_subghz_async_tx.buffer;
dma_config.Direction = LL_DMA_DIRECTION_MEMORY_TO_PERIPH;
dma_config.Mode = LL_DMA_MODE_CIRCULAR;
dma_config.PeriphOrM2MSrcIncMode = LL_DMA_PERIPH_NOINCREMENT;
dma_config.MemoryOrM2MDstIncMode = LL_DMA_MEMORY_INCREMENT;
dma_config.PeriphOrM2MSrcDataSize = LL_DMA_PDATAALIGN_WORD;
dma_config.MemoryOrM2MDstDataSize = LL_DMA_MDATAALIGN_WORD;
dma_config.NbData = API_HAL_SUBGHZ_ASYNC_TX_BUFFER_FULL;
dma_config.PeriphRequest = LL_DMAMUX_REQ_TIM2_UP;
dma_config.Priority = LL_DMA_MODE_NORMAL;
LL_DMA_Init(DMA1, LL_DMA_CHANNEL_1, &dma_config);
furi_hal_interrupt_set_isr(FuriHalInterruptIdDma1Ch1, furi_hal_subghz_async_tx_dma_isr, NULL);
LL_DMA_EnableIT_TC(DMA1, LL_DMA_CHANNEL_1);
LL_DMA_EnableIT_HT(DMA1, LL_DMA_CHANNEL_1);
LL_DMA_EnableChannel(DMA1, LL_DMA_CHANNEL_1);
// Configure TIM2
LL_TIM_InitTypeDef TIM_InitStruct = {0};
TIM_InitStruct.Prescaler = 64 - 1;
TIM_InitStruct.CounterMode = LL_TIM_COUNTERMODE_UP;
TIM_InitStruct.Autoreload = 1000;
TIM_InitStruct.ClockDivision = LL_TIM_CLOCKDIVISION_DIV1;
LL_TIM_Init(TIM2, &TIM_InitStruct);
LL_TIM_SetClockSource(TIM2, LL_TIM_CLOCKSOURCE_INTERNAL);
LL_TIM_EnableARRPreload(TIM2);
// Configure TIM2 CH2
LL_TIM_OC_InitTypeDef TIM_OC_InitStruct = {0};
TIM_OC_InitStruct.OCMode = LL_TIM_OCMODE_TOGGLE;
TIM_OC_InitStruct.OCState = LL_TIM_OCSTATE_DISABLE;
TIM_OC_InitStruct.OCNState = LL_TIM_OCSTATE_DISABLE;
TIM_OC_InitStruct.CompareValue = 0;
TIM_OC_InitStruct.OCPolarity = LL_TIM_OCPOLARITY_HIGH;
LL_TIM_OC_Init(TIM2, LL_TIM_CHANNEL_CH2, &TIM_OC_InitStruct);
LL_TIM_OC_DisableFast(TIM2, LL_TIM_CHANNEL_CH2);
LL_TIM_DisableMasterSlaveMode(TIM2);
furi_hal_interrupt_set_isr(FuriHalInterruptIdTIM2, furi_hal_subghz_async_tx_timer_isr, NULL);
LL_TIM_EnableIT_UPDATE(TIM2);
LL_TIM_EnableDMAReq_UPDATE(TIM2);
LL_TIM_CC_EnableChannel(TIM2, LL_TIM_CHANNEL_CH2);
// Start counter
LL_TIM_GenerateEvent_UPDATE(TIM2);
#ifdef FURI_HAL_SUBGHZ_TX_GPIO
furi_hal_gpio_write(&FURI_HAL_SUBGHZ_TX_GPIO, true);
#endif
furi_hal_subghz_tx();
LL_TIM_SetCounter(TIM2, 0);
LL_TIM_EnableCounter(TIM2);
return true;
}
bool furi_hal_subghz_is_async_tx_complete() {
return furi_hal_subghz.state == SubGhzStateAsyncTxEnd;
}
void furi_hal_subghz_stop_async_tx() {
furi_assert(
furi_hal_subghz.state == SubGhzStateAsyncTx ||
furi_hal_subghz.state == SubGhzStateAsyncTxLast ||
furi_hal_subghz.state == SubGhzStateAsyncTxEnd);
// Shutdown radio
furi_hal_subghz_idle();
#ifdef FURI_HAL_SUBGHZ_TX_GPIO
furi_hal_gpio_write(&FURI_HAL_SUBGHZ_TX_GPIO, false);
#endif
// Deinitialize Timer
FURI_CRITICAL_ENTER();
LL_TIM_DeInit(TIM2);
furi_hal_interrupt_set_isr(FuriHalInterruptIdTIM2, NULL, NULL);
// Deinitialize DMA
LL_DMA_DeInit(DMA1, LL_DMA_CHANNEL_1);
furi_hal_interrupt_set_isr(FuriHalInterruptIdDma1Ch1, NULL, NULL);
// Deinitialize GPIO
furi_hal_gpio_init(&gpio_cc1101_g0, GpioModeAnalog, GpioPullNo, GpioSpeedLow);
FURI_CRITICAL_EXIT();
free(furi_hal_subghz_async_tx.buffer);
float duty_cycle =
100.0f * (float)furi_hal_subghz_async_tx.duty_high /
((float)furi_hal_subghz_async_tx.duty_low + (float)furi_hal_subghz_async_tx.duty_high);
FURI_LOG_D(
TAG,
"Async TX Radio stats: on %0.0fus, off %0.0fus, DutyCycle: %0.0f%%",
(double)furi_hal_subghz_async_tx.duty_high,
(double)furi_hal_subghz_async_tx.duty_low,
(double)duty_cycle);
furi_hal_subghz.state = SubGhzStateIdle;
}
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