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temporary DMA based timer capturing

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This commit is contained in:
g3gg0
2022-11-19 00:22:41 +01:00
parent d6903a4a06
commit 24f8db3c27
1 changed files with 27 additions and 16 deletions
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lib/nfc/protocols/nfcv.c
+27 -16
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@@ -568,6 +568,13 @@ void nfcv_emu_handle_packet(FuriHalNfcDevData* nfc_data, NfcVData* nfcv_data, ui
#define COUNT(x) ((sizeof(x))/(sizeof(x[0])))
uint32_t nfcv_timer_buffer_src[32];
uint32_t nfcv_timer_buffer[1024];
volatile uint32_t nfcv_gpio_calls = 0;
void nfcv_gpio_cb(void* ctx) {
UNUSED(ctx);
nfcv_gpio_calls++;
}
void nfcv_emu_init(FuriHalNfcDevData* nfc_data, NfcVData* nfcv_data) {
nfcv_emu_alloc();
@@ -589,7 +596,6 @@ void nfcv_emu_init(FuriHalNfcDevData* nfc_data, NfcVData* nfcv_data) {
FURI_LOG_D(TAG, " Privacy pass: 0x%08lX", nfcv_read_be(nfcv_data->sub_data.slix_l.key_privacy, 4));
FURI_LOG_D(TAG, " Privacy mode: %s", nfcv_data->sub_data.slix_l.privacy ? "ON" : "OFF");
#if 0
memset(nfcv_timer_buffer_src, 0xEE, sizeof(nfcv_timer_buffer_src));
memset(nfcv_timer_buffer, 0xFA, sizeof(nfcv_timer_buffer));
@@ -602,8 +608,8 @@ void nfcv_emu_init(FuriHalNfcDevData* nfc_data, NfcVData* nfcv_data) {
dma_config.MemoryOrM2MDstAddress = (uint32_t) nfcv_timer_buffer;
dma_config.MemoryOrM2MDstIncMode = LL_DMA_MEMORY_INCREMENT;
dma_config.MemoryOrM2MDstDataSize = LL_DMA_MDATAALIGN_WORD;
dma_config.Mode = LL_DMA_MODE_NORMAL;
dma_config.NbData = 32; /* executes LL_DMA_SetDataLength */
dma_config.Mode = LL_DMA_MODE_CIRCULAR;
dma_config.NbData = COUNT(nfcv_timer_buffer); /* executes LL_DMA_SetDataLength */
dma_config.PeriphRequest = LL_DMAMUX_REQ_GENERATOR0; /* executes LL_DMA_SetPeriphRequest */
dma_config.Priority = LL_DMA_PRIORITY_VERYHIGH;
@@ -617,7 +623,7 @@ void nfcv_emu_init(FuriHalNfcDevData* nfc_data, NfcVData* nfcv_data) {
LL_TIM_SetCounterMode(TIM2, LL_TIM_COUNTERMODE_UP);
LL_TIM_SetClockDivision(TIM2, LL_TIM_CLOCKDIVISION_DIV1);
LL_TIM_SetPrescaler(TIM2, 0);
LL_TIM_SetAutoReload(TIM2, 0xFFF);
LL_TIM_SetAutoReload(TIM2, 0xFFFFFFFF);
LL_TIM_SetCounter(TIM2, 0);
LL_TIM_EnableCounter(TIM2);
@@ -625,15 +631,13 @@ void nfcv_emu_init(FuriHalNfcDevData* nfc_data, NfcVData* nfcv_data) {
LL_DMAMUX_DisableRequestGen(NULL, LL_DMAMUX_REQ_GEN_0);
/* generator 0 gets fed by EXTI_LINE4 */
LL_DMAMUX_SetRequestSignalID(NULL, LL_DMAMUX_REQ_GEN_0, LL_DMAMUX_REQ_GEN_EXTI_LINE4);
/* trigger on any edge - for now. should be only one? */
/* trigger on any edge */
LL_DMAMUX_SetRequestGenPolarity(NULL, LL_DMAMUX_REQ_GEN_0, LL_DMAMUX_REQ_GEN_POL_RISING);
/* now enable request generation again */
LL_DMAMUX_EnableRequestGen(NULL, LL_DMAMUX_REQ_GEN_0);
/* configure PB4 as source for EXTI_LINE4. shall it rain. */
LL_SYSCFG_SetEXTISource(LL_SYSCFG_EXTI_PORTB, LL_GPIO_PIN_4);
#endif
/* we need the EXTI to be configured as interrupt generating line, but no ISR registered */
furi_hal_gpio_init_ex(&gpio_spi_r_miso, GpioModeInterruptRiseFall, GpioPullNo, GpioSpeedVeryHigh, GpioAltFnUnused);
}
@@ -679,7 +683,7 @@ bool nfcv_emu_loop(FuriHalNfcDevData* nfc_data, NfcVData* nfcv_data, uint32_t ti
next_sleep = cur_time + (timeout_ms * clocks_in_ms);
/* start edge counting on first rising edge */
if(state || edges_received) {
if(0 && (state || edges_received)) {
edges_received++;
/* ignore periods which are too long, might happen on field start */
@@ -693,8 +697,8 @@ bool nfcv_emu_loop(FuriHalNfcDevData* nfc_data, NfcVData* nfcv_data, uint32_t ti
if(state) {
if(periods == 1) {
FURI_CRITICAL_ENTER_ADV();
timeout = cur_time + bit_time * 16;
in_critical = true;
timeout = cur_time + bit_time * 16;
frame_state = NFCV_FRAME_STATE_SOF2;
} else {
snprintf(reset_reason, sizeof(reset_reason), "SOF: Expected 1 period, got %lu", periods);
@@ -856,16 +860,23 @@ bool nfcv_emu_loop(FuriHalNfcDevData* nfc_data, NfcVData* nfcv_data, uint32_t ti
nfcv_emu_handle_packet(nfc_data, nfcv_data, frame_payload, frame_pos);
ret = true;
}
/*
printf("edges_received: %lu\r\n", edges_received);
printf("nfcv_gpio_calls: %lu\r\n", nfcv_gpio_calls);
printf("nfcv_timer_buffer: %ld", LL_DMA_GetDataLength(DMA1, LL_DMA_CHANNEL_4));
for(uint32_t pos = 0; pos < 64; pos++) {
uint32_t prev_timer = 0;
for(uint32_t pos = 0; pos < COUNT(nfcv_timer_buffer) - LL_DMA_GetDataLength(DMA1, LL_DMA_CHANNEL_4); pos++) {
if((pos % 4) == 0) {
printf("\r\n");
}
printf(" 0x%08lX ", nfcv_timer_buffer[pos]);
printf(" 0x%08lX ", (nfcv_timer_buffer[pos] - prev_timer));
prev_timer = nfcv_timer_buffer[pos];
}
furi_delay_ms(100);
*/
printf("\r\n");
//furi_delay_ms(100);
return ret;
}