marisa/tcd1304-driver
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STM32: fix timers

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- Correctly synchronize TIM2 & TIM5 for correct ICG and SH clocks
This commit is contained in:
𝑀𝒶𝓇𝒾𝓈𝒶
2023-10-29 20:55:36 -03:00
parent 8acd6a736e
commit bb3b2bd4e2
3 changed files with 21 additions and 15 deletions
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29
Core/Src/TCD1304.c
View File

@@ -26,10 +26,11 @@ extern void init_icg_sh();
extern void init_adc_tim();
#define CCDBufSz 3694
#define CommTxBufSz CCDBufSz * 2 + sizeof(CCDCmd_t)
#define CommTxBufSz sizeof(CCDCmd_t) + CCDBufSz * 2
#define CommRxBufSz 16
uint8_t CommRxBuf[CommRxBufSz] = { 0 };
uint8_t CommTxBuf[CommTxBufSz] = { 0 };
uint16_t CCDBuf[CCDBufSz] = { 0 };
int curr_reading = 0;
int flushed = 0;
@@ -57,7 +58,9 @@ void tcd1304_setup() {
ccd_config.icg_period = 630000;
HAL_TIM_PWM_Start(&htim3, TIM_CHANNEL_1); //PA6 - fM
HAL_TIM_PWM_Start(&htim4, TIM_CHANNEL_4); //ADC
HAL_UART_Receive_DMA(&huart1, CommRxBuf, CommRxBufSz);
HAL_TIM_Base_Start_IT(&htim2);
}
void tcd1304_loop() {
@@ -87,15 +90,13 @@ void tcd1304_config_icg_sh() {
HAL_TIM_PWM_Start(&htim2, TIM_CHANNEL_1); //PA0 - ICG
__HAL_TIM_SET_COUNTER(&htim2, 66); //600 ns delay
HAL_TIM_PWM_Start(&htim5, TIM_CHANNEL_3); //PA2 - SH
HAL_TIM_Base_Start_IT(&htim2);
__HAL_TIM_SET_COUNTER(&htim5, 0); //600 ns delay
}
void tcd1304_stop_timers() {
HAL_ADC_Stop_DMA(&hadc1);
HAL_TIM_PWM_Stop(&htim4, TIM_CHANNEL_4); //ADC
HAL_TIM_Base_Stop(&htim2);
HAL_TIM_Base_Stop(&htim4);
HAL_TIM_Base_Stop(&htim5);
HAL_TIM_PWM_Stop(&htim2, TIM_CHANNEL_1);
HAL_TIM_PWM_Stop(&htim5, TIM_CHANNEL_3);
}
void tcd1304_transmit_cmd(CCDCmd_t *cmd) {
@@ -110,11 +111,8 @@ void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim) {
if (curr_reading == 3)
flushed = 1;
if (curr_reading == 6) {
init_adc_tim();
HAL_ADC_Start_DMA(&hadc1, (uint32_t*) (CommTxBuf + sizeof(CCDCmd_t)),
CCDBufSz);
HAL_TIM_PWM_Start(&htim4, TIM_CHANNEL_4); //ADC
if (curr_reading >= 6) {
HAL_ADC_Start_DMA(&hadc1, (uint32_t*) CCDBuf, CCDBufSz);
}
curr_reading++;
@@ -161,6 +159,11 @@ void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart) {
}
void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef *hadc) {
if (hadc != &hadc1)
return;
HAL_ADC_Stop_DMA(&hadc1);
// __asm__("nop");
HAL_GPIO_WritePin(GPIOC, GPIO_PIN_13, GPIO_PIN_SET);
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_4, GPIO_PIN_SET);
@@ -173,8 +176,10 @@ void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef *hadc) {
cmd->magic = MAGIC;
cmd->type = CCDMSG_READ;
cmd->len = CCDBufSz * 2;
memcpy(cmd->data, CCDBuf, CCDBufSz * 2);
// tcd1304_stop_timers();
tcd1304_stop_timers();
tcd1304_transmit_cmd(cmd);
}

2
Core/Src/main.c
View File

@@ -198,7 +198,7 @@ static void MX_ADC1_Init(void)
hadc1.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV4;
hadc1.Init.Resolution = ADC_RESOLUTION_12B;
hadc1.Init.ScanConvMode = DISABLE;
hadc1.Init.ContinuousConvMode = ENABLE;
hadc1.Init.ContinuousConvMode = DISABLE;
hadc1.Init.DiscontinuousConvMode = DISABLE;
hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_RISING;
hadc1.Init.ExternalTrigConv = ADC_EXTERNALTRIGCONV_T4_CC4;