Need help setting up DMA on STM32F1 & F4

[Ubus99]

Hi, I am trying to set up an input capture with DMA on a F1 and a F4 chip.

The documentation is confusing, and most tutorials don't work for my specific scenario. For a start, when setting up DMA using cubeMX, I can't configure source, destination and data length.

Reading the Documentation I should use HAL_DMA_START(); and put those values in there, but when called, it just tells me that the DMA controller is busy. I can't find any resources about what that means, what do I need to change?

And getting the hdma is tedious as well. I got it working using

htim1.hdma[TIM_DMA_ID_CC1]

But there got to be a better way.

[waclawek.jan]

> Hi, I am trying to set up an input capture with DMA on a F1 and a F4 chip.

What exactly is the problem?

Describe, what' you've done, in terms of TIM and DMA registers content, one chip at a time.

JW

[Ubus99]

I did most of the configuration in MX:

TIM1:

• Channel 1 input capture on PA8
• pull-down
• DMA2 Stream 1

DMA:

• Same as above,
• Circular
• low priority
• Half Word.

My Main.c:

/* USER CODE BEGIN Header */
/**
 ******************************************************************************
 * @file : main.c
 * @brief : Main program body
 ******************************************************************************
 * @attention
 *
 * <h2><center>&copy; Copyright (c) 2020 STMicroelectronics.
 * All rights reserved.</center></h2>
 *
 * This software component is licensed by ST under BSD 3-Clause license,
 * the "License"; You may not use this file except in compliance with the
 * License. You may obtain a copy of the License at:
 * opensource.org/licenses/BSD-3-Clause
 *
 ******************************************************************************
 */
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
 
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
 
/* USER CODE END Includes */
 
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
 
/* USER CODE END PTD */
 
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */
 
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
 
/* USER CODE END PM */
 
/* Private variables ---------------------------------------------------------*/
TIM_HandleTypeDef htim1;
DMA_HandleTypeDef hdma_tim1_ch1;
 
UART_HandleTypeDef huart2;
 
/* USER CODE BEGIN PV */
uint8_t test[6];
uint16_t timer;
/* USER CODE END PV */
 
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_DMA_Init(void);
static void MX_USART2_UART_Init(void);
static void MX_TIM1_Init(void);
/* USER CODE BEGIN PFP */
 
/* USER CODE END PFP */
 
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
 
/* USER CODE END 0 */
 
/**
 * @brief The application entry point.
 * @retval int
 */
int main(void) {
	/* USER CODE BEGIN 1 */
 
	/* USER CODE END 1 */
 
	/* MCU Configuration--------------------------------------------------------*/
 
	/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
	HAL_Init();
 
	/* USER CODE BEGIN Init */
 
	/* USER CODE END Init */
 
	/* Configure the system clock */
	SystemClock_Config();
 
	/* USER CODE BEGIN SysInit */
 
	/* USER CODE END SysInit */
 
	/* Initialize all configured peripherals */
	MX_GPIO_Init();
	MX_DMA_Init();
	MX_USART2_UART_Init();
	MX_TIM1_Init();
	/* USER CODE BEGIN 2 */
 
	HAL_TIM_Base_Start(&htim1);
	HAL_DMA_Start(htim1.hdma[TIM_DMA_ID_CC1], (uint32_t) &TIM1->CCR1,
			(uint32_t) &test, 0x06); //god i hope this works
	/* USER CODE END 2 */
 
	/* Infinite loop */
	/* USER CODE BEGIN WHILE */
	while (1) {
		/* USER CODE END WHILE */
 
		/* USER CODE BEGIN 3 */
	}
	/* USER CODE END 3 */
}
 
/**
 * @brief System Clock Configuration
 * @retval None
 */
void SystemClock_Config(void) {
	RCC_OscInitTypeDef RCC_OscInitStruct = { 0 };
	RCC_ClkInitTypeDef RCC_ClkInitStruct = { 0 };
 
	/** Configure the main internal regulator output voltage
	 */
	__HAL_RCC_PWR_CLK_ENABLE();
	__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE2);
	/** Initializes the RCC Oscillators according to the specified parameters
	 * in the RCC_OscInitTypeDef structure.
	 */
	RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
	RCC_OscInitStruct.HSIState = RCC_HSI_ON;
	RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
	RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
	RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
	RCC_OscInitStruct.PLL.PLLM = 16;
	RCC_OscInitStruct.PLL.PLLN = 336;
	RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV4;
	RCC_OscInitStruct.PLL.PLLQ = 7;
	if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
		Error_Handler();
	}
	/** Initializes the CPU, AHB and APB buses clocks
	 */
	RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK
			| RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2;
	RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
	RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
	RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
	RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
 
	if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK) {
		Error_Handler();
	}
}
 
/**
 * @brief TIM1 Initialization Function
 * @param None
 * @retval None
 */
static void MX_TIM1_Init(void) {
 
	/* USER CODE BEGIN TIM1_Init 0 */
 
	/* USER CODE END TIM1_Init 0 */
 
	TIM_ClockConfigTypeDef sClockSourceConfig = { 0 };
	TIM_MasterConfigTypeDef sMasterConfig = { 0 };
	TIM_IC_InitTypeDef sConfigIC = { 0 };
 
	/* USER CODE BEGIN TIM1_Init 1 */
 
	/* USER CODE END TIM1_Init 1 */
	htim1.Instance = TIM1;
	htim1.Init.Prescaler = 4;
	htim1.Init.CounterMode = TIM_COUNTERMODE_UP;
	htim1.Init.Period = 65535;
	htim1.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
	htim1.Init.RepetitionCounter = 0;
	htim1.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
	if (HAL_TIM_Base_Init(&htim1) != HAL_OK) {
		Error_Handler();
	}
	sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
	if (HAL_TIM_ConfigClockSource(&htim1, &sClockSourceConfig) != HAL_OK) {
		Error_Handler();
	}
	if (HAL_TIM_IC_Init(&htim1) != HAL_OK) {
		Error_Handler();
	}
	sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
	sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
	if (HAL_TIMEx_MasterConfigSynchronization(&htim1, &sMasterConfig)
			!= HAL_OK) {
		Error_Handler();
	}
	sConfigIC.ICPolarity = TIM_INPUTCHANNELPOLARITY_RISING;
	sConfigIC.ICSelection = TIM_ICSELECTION_DIRECTTI;
	sConfigIC.ICPrescaler = TIM_ICPSC_DIV1;
	sConfigIC.ICFilter = 0;
	if (HAL_TIM_IC_ConfigChannel(&htim1, &sConfigIC, TIM_CHANNEL_1) != HAL_OK) {
		Error_Handler();
	}
	/* USER CODE BEGIN TIM1_Init 2 */
 
	/* USER CODE END TIM1_Init 2 */
 
}
 
/**
 * @brief USART2 Initialization Function
 * @param None
 * @retval None
 */
static void MX_USART2_UART_Init(void) {
 
	/* USER CODE BEGIN USART2_Init 0 */
 
	/* USER CODE END USART2_Init 0 */
 
	/* USER CODE BEGIN USART2_Init 1 */
 
	/* USER CODE END USART2_Init 1 */
	huart2.Instance = USART2;
	huart2.Init.BaudRate = 115200;
	huart2.Init.WordLength = UART_WORDLENGTH_8B;
	huart2.Init.StopBits = UART_STOPBITS_1;
	huart2.Init.Parity = UART_PARITY_NONE;
	huart2.Init.Mode = UART_MODE_TX_RX;
	huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
	huart2.Init.OverSampling = UART_OVERSAMPLING_16;
	if (HAL_UART_Init(&huart2) != HAL_OK) {
		Error_Handler();
	}
	/* USER CODE BEGIN USART2_Init 2 */
 
	/* USER CODE END USART2_Init 2 */
 
}
 
/**
 * Enable DMA controller clock
 */
static void MX_DMA_Init(void) {
 
	/* DMA controller clock enable */
	__HAL_RCC_DMA2_CLK_ENABLE();
 
	/* DMA interrupt init */
	/* DMA2_Stream1_IRQn interrupt configuration */
	HAL_NVIC_SetPriority(DMA2_Stream1_IRQn, 0, 0);
	HAL_NVIC_EnableIRQ(DMA2_Stream1_IRQn);
 
}
 
/**
 * @brief GPIO Initialization Function
 * @param None
 * @retval None
 */
static void MX_GPIO_Init(void) {
	GPIO_InitTypeDef GPIO_InitStruct = { 0 };
 
	/* GPIO Ports Clock Enable */
	__HAL_RCC_GPIOC_CLK_ENABLE();
	__HAL_RCC_GPIOH_CLK_ENABLE();
	__HAL_RCC_GPIOA_CLK_ENABLE();
	__HAL_RCC_GPIOB_CLK_ENABLE();
 
	/*Configure GPIO pin Output Level */
	HAL_GPIO_WritePin(LD2_GPIO_Port, LD2_Pin, GPIO_PIN_RESET);
 
	/*Configure GPIO pin : B1_Pin */
	GPIO_InitStruct.Pin = B1_Pin;
	GPIO_InitStruct.Mode = GPIO_MODE_IT_FALLING;
	GPIO_InitStruct.Pull = GPIO_NOPULL;
	HAL_GPIO_Init(B1_GPIO_Port, &GPIO_InitStruct);
 
	/*Configure GPIO pin : LD2_Pin */
	GPIO_InitStruct.Pin = LD2_Pin;
	GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
	GPIO_InitStruct.Pull = GPIO_NOPULL;
	GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
	HAL_GPIO_Init(LD2_GPIO_Port, &GPIO_InitStruct);
 
}
 
/* USER CODE BEGIN 4 */
 
/* USER CODE END 4 */
 
/**
 * @brief This function is executed in case of error occurrence.
 * @retval None
 */
void Error_Handler(void) {
	/* USER CODE BEGIN Error_Handler_Debug */
	/* User can add his own implementation to report the HAL error return state */
 
	/* USER CODE END Error_Handler_Debug */
}
 
#ifdef USE_FULL_ASSERT
/**
 * @brief Reports the name of the source file and the source line number
 * where the assert_param error has occurred.
 * @param file: pointer to the source file name
 * @param line: assert_param error line source number
 * @retval None
 */
void assert_failed(uint8_t *file, uint32_t line)
{
 /* USER CODE BEGIN 6 */
 /* User can add his own implementation to report the file name and line number,
 tex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
 /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */
 
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

The Code runs, but the DMA doesn't, i suspect its because the HAL_DMA_START function fails, breakpoints show it's because the DMA is busy

--------------------------------------------------------

I am using

 htim1.hdma[TIM_DMA_ID_CC1]

because when writing for F1, the hdma is declared in the TIM.c file and isn't in the scope of main.c, I could change that, but am unsure if this is the intended way of doing it.

[MM..1]

Try swap tim base start with dma start

[Ubus99]

did that before, this is the second version. Neither work.

[waclawek.jan]

This is which STM32 exactly? Let's discuss only one of them for now.

Did you verify that the capture works?

Read out and check/post the TIM, DMA and relevant GPIO registers' content.

I don't Cube/CubeMX.

JW

[Ubus99]

Hi Waclawek, I am currently working on a nucleoF401RE for development purposes, but in production we use F1RCTs on custom boards (I know, I know...)

I went through the code step by step and checked against the documentation, and I found that I used the wrong start function.

/* USER CODE BEGIN Header */
/**
 ******************************************************************************
 * @file : main.c
 * @brief : Main program body
 ******************************************************************************
 * @attention
 *
 * <h2><center>&copy; Copyright (c) 2020 STMicroelectronics.
 * All rights reserved.</center></h2>
 *
 * This software component is licensed by ST under BSD 3-Clause license,
 * the "License"; You may not use this file except in compliance with the
 * License. You may obtain a copy of the License at:
 * opensource.org/licenses/BSD-3-Clause
 *
 ******************************************************************************
 */
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
 
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
 
/* USER CODE END Includes */
 
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
 
/* USER CODE END PTD */
 
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */
 
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
 
/* USER CODE END PM */
 
/* Private variables ---------------------------------------------------------*/
TIM_HandleTypeDef htim1;
DMA_HandleTypeDef hdma_tim1_ch1;
 
UART_HandleTypeDef huart2;
 
/* USER CODE BEGIN PV */
uint32_t test[6];
uint32_t timer;
/* USER CODE END PV */
 
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_DMA_Init(void);
static void MX_USART2_UART_Init(void);
static void MX_TIM1_Init(void);
/* USER CODE BEGIN PFP */
 
/* USER CODE END PFP */
 
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
 
/* USER CODE END 0 */
 
/**
 * @brief The application entry point.
 * @retval int
 */
int main(void) {
	/* USER CODE BEGIN 1 */
 
	/* USER CODE END 1 */
 
	/* MCU Configuration--------------------------------------------------------*/
 
	/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
	HAL_Init();
 
	/* USER CODE BEGIN Init */
 
	/* USER CODE END Init */
 
	/* Configure the system clock */
	SystemClock_Config();
 
	/* USER CODE BEGIN SysInit */
 
	/* USER CODE END SysInit */
 
	/* Initialize all configured peripherals */
	MX_GPIO_Init();
	MX_DMA_Init();
	MX_USART2_UART_Init();
	MX_TIM1_Init();
	/* USER CODE BEGIN 2 */
 
	//HAL_TIM_Base_Start_DMA(&htim1, test, 6);
	HAL_TIM_IC_Start_DMA(&htim1, TIM_CHANNEL_1, test, sizeof test);
 
	/* USER CODE END 2 */
 
	/* Infinite loop */
	/* USER CODE BEGIN WHILE */
	while (1) {
		timer = __HAL_TIM_GET_COUNTER(&htim1);
		/* USER CODE END WHILE */
 
		/* USER CODE BEGIN 3 */
	}
	/* USER CODE END 3 */
}
 
/**
 * @brief System Clock Configuration
 * @retval None
 */
void SystemClock_Config(void) {
	RCC_OscInitTypeDef RCC_OscInitStruct = { 0 };
	RCC_ClkInitTypeDef RCC_ClkInitStruct = { 0 };
 
	/** Configure the main internal regulator output voltage
	 */
	__HAL_RCC_PWR_CLK_ENABLE();
	__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE2);
	/** Initializes the RCC Oscillators according to the specified parameters
	 * in the RCC_OscInitTypeDef structure.
	 */
	RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
	RCC_OscInitStruct.HSIState = RCC_HSI_ON;
	RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
	RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
	RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
	RCC_OscInitStruct.PLL.PLLM = 16;
	RCC_OscInitStruct.PLL.PLLN = 336;
	RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV4;
	RCC_OscInitStruct.PLL.PLLQ = 7;
	if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
		Error_Handler();
	}
	/** Initializes the CPU, AHB and APB buses clocks
	 */
	RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK
			| RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2;
	RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
	RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
	RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
	RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
 
	if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK) {
		Error_Handler();
	}
}
 
/**
 * @brief TIM1 Initialization Function
 * @param None
 * @retval None
 */
static void MX_TIM1_Init(void) {
 
	/* USER CODE BEGIN TIM1_Init 0 */
 
	/* USER CODE END TIM1_Init 0 */
 
	TIM_ClockConfigTypeDef sClockSourceConfig = { 0 };
	TIM_MasterConfigTypeDef sMasterConfig = { 0 };
	TIM_IC_InitTypeDef sConfigIC = { 0 };
 
	/* USER CODE BEGIN TIM1_Init 1 */
 
	/* USER CODE END TIM1_Init 1 */
	htim1.Instance = TIM1;
	htim1.Init.Prescaler = 4;
	htim1.Init.CounterMode = TIM_COUNTERMODE_UP;
	htim1.Init.Period = 65535;
	htim1.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
	htim1.Init.RepetitionCounter = 0;
	htim1.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
	if (HAL_TIM_Base_Init(&htim1) != HAL_OK) {
		Error_Handler();
	}
	sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
	if (HAL_TIM_ConfigClockSource(&htim1, &sClockSourceConfig) != HAL_OK) {
		Error_Handler();
	}
	if (HAL_TIM_IC_Init(&htim1) != HAL_OK) {
		Error_Handler();
	}
	sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
	sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
	if (HAL_TIMEx_MasterConfigSynchronization(&htim1, &sMasterConfig)
			!= HAL_OK) {
		Error_Handler();
	}
	sConfigIC.ICPolarity = TIM_INPUTCHANNELPOLARITY_RISING;
	sConfigIC.ICSelection = TIM_ICSELECTION_DIRECTTI;
	sConfigIC.ICPrescaler = TIM_ICPSC_DIV1;
	sConfigIC.ICFilter = 0;
	if (HAL_TIM_IC_ConfigChannel(&htim1, &sConfigIC, TIM_CHANNEL_1) != HAL_OK) {
		Error_Handler();
	}
	/* USER CODE BEGIN TIM1_Init 2 */
 
	/* USER CODE END TIM1_Init 2 */
 
}
 
/**
 * @brief USART2 Initialization Function
 * @param None
 * @retval None
 */
static void MX_USART2_UART_Init(void) {
 
	/* USER CODE BEGIN USART2_Init 0 */
 
	/* USER CODE END USART2_Init 0 */
 
	/* USER CODE BEGIN USART2_Init 1 */
 
	/* USER CODE END USART2_Init 1 */
	huart2.Instance = USART2;
	huart2.Init.BaudRate = 115200;
	huart2.Init.WordLength = UART_WORDLENGTH_8B;
	huart2.Init.StopBits = UART_STOPBITS_1;
	huart2.Init.Parity = UART_PARITY_NONE;
	huart2.Init.Mode = UART_MODE_TX_RX;
	huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
	huart2.Init.OverSampling = UART_OVERSAMPLING_16;
	if (HAL_UART_Init(&huart2) != HAL_OK) {
		Error_Handler();
	}
	/* USER CODE BEGIN USART2_Init 2 */
 
	/* USER CODE END USART2_Init 2 */
 
}
 
/**
 * Enable DMA controller clock
 */
static void MX_DMA_Init(void) {
 
	/* DMA controller clock enable */
	__HAL_RCC_DMA2_CLK_ENABLE();
 
	/* DMA interrupt init */
	/* DMA2_Stream1_IRQn interrupt configuration */
	HAL_NVIC_SetPriority(DMA2_Stream1_IRQn, 0, 0);
	HAL_NVIC_EnableIRQ(DMA2_Stream1_IRQn);
 
}
 
/**
 * @brief GPIO Initialization Function
 * @param None
 * @retval None
 */
static void MX_GPIO_Init(void) {
	GPIO_InitTypeDef GPIO_InitStruct = { 0 };
 
	/* GPIO Ports Clock Enable */
	__HAL_RCC_GPIOC_CLK_ENABLE();
	__HAL_RCC_GPIOH_CLK_ENABLE();
	__HAL_RCC_GPIOA_CLK_ENABLE();
	__HAL_RCC_GPIOB_CLK_ENABLE();
 
	/*Configure GPIO pin Output Level */
	HAL_GPIO_WritePin(LD2_GPIO_Port, LD2_Pin, GPIO_PIN_RESET);
 
	/*Configure GPIO pin : B1_Pin */
	GPIO_InitStruct.Pin = B1_Pin;
	GPIO_InitStruct.Mode = GPIO_MODE_IT_FALLING;
	GPIO_InitStruct.Pull = GPIO_NOPULL;
	HAL_GPIO_Init(B1_GPIO_Port, &GPIO_InitStruct);
 
	/*Configure GPIO pin : LD2_Pin */
	GPIO_InitStruct.Pin = LD2_Pin;
	GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
	GPIO_InitStruct.Pull = GPIO_NOPULL;
	GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
	HAL_GPIO_Init(LD2_GPIO_Port, &GPIO_InitStruct);
 
}
 
/* USER CODE BEGIN 4 */
 
/* USER CODE END 4 */
 
/**
 * @brief This function is executed in case of error occurrence.
 * @retval None
 */
void Error_Handler(void) {
	/* USER CODE BEGIN Error_Handler_Debug */
	/* User can add his own implementation to report the HAL error return state */
 
	/* USER CODE END Error_Handler_Debug */
}
 
#ifdef USE_FULL_ASSERT
/**
 * @brief Reports the name of the source file and the source line number
 * where the assert_param error has occurred.
 * @param file: pointer to the source file name
 * @param line: assert_param error line source number
 * @retval None
 */
void assert_failed(uint8_t *file, uint32_t line)
{
 /* USER CODE BEGIN 6 */
 /* User can add his own implementation to report the file name and line number,
 tex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
 /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */
 
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

Now it starts the timer, captures the signal and transfers it.

Thing is, the data that I get out is weird, probably because the input capture is faster than I can remove the signal, then again, I told it only to capture on a rising edge.

My circular buffer is getting overwritten completely when connecting the debug-wires.