Question
How to configure GPDMA in STM32H563ZI for USART
I am using Nucleo-H563ZI in this. I was configuring USART6 in DMA mode, but for this controller instead of DMA, there was GPDMA1/2. Currently, I have configured it in GPDMA1. The module is EC200. I am transmitting AT but am not getting the response that it is OK. Therefore, I am not sure whether the USART is correctly configured or not
/* Includes ------------------------------------------------------------------*/
#include "main.h"
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include <string.h>
#include <stdio.h>
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
/* USER CODE END PTD */
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
#define EC200_RX_SIZE 16
/* USER CODE END PD */
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
/* USER CODE END PM */
/* Private variables ---------------------------------------------------------*/
COM_InitTypeDef BspCOMInit;
UART_HandleTypeDef huart4;
UART_HandleTypeDef huart6;
DMA_HandleTypeDef handle_GPDMA1_Channel1;
DMA_HandleTypeDef handle_GPDMA1_Channel0;
/* USER CODE BEGIN PV */
uint8_t EC200_TX[] = "AT\r\n";
uint8_t EC200_RX[16] = {0};
volatile uint8_t TxComplete = 0; // Separate flag for TX
volatile uint8_t RxComplete = 0; // Flag for RX
int isSent = 1;
int countloop =0;
int countinterrupt = 0;
//uint8_t RxComplete = 0;
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_GPDMA1_Init(void);
static void MX_UART4_Init(void);
static void MX_ICACHE_Init(void);
static void MX_USART6_UART_Init(void);
/* USER CODE BEGIN PFP */
/* USER CODE END PFP */
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
//void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart)
//{
//// isSent = 1;
// countinterrupt++;
// HAL_UART_Receive_DMA(&huart6, EC200_RX, 4);
//}
//
//void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
//{
// // Set flag to indicate reception complete
// RxComplete = 1;
// // Ready to send next command
// isSent = 1;
//}
// 3. In your TX callback, use the consistent buffer size:
void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart)
{
if(huart == &huart6)
{
TxComplete = 1;
countinterrupt++;
// Start receiving with consistent buffer size
HAL_UART_Receive_DMA(&huart6, EC200_RX, EC200_RX_SIZE);
}
}
// 4. Add debug output in your RX callback
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
if(huart == &huart6)
{
RxComplete = 1;
// Toggle LED for visual confirmation
BSP_LED_Toggle(LED_YELLOW);
// Set flag to send next command after a delay
isSent = 1;
}
}
// Add error callback to catch DMA errors
void HAL_UART_ErrorCallback(UART_HandleTypeDef *huart)
{
if(huart == &huart6)
{
// Toggle RED LED rapidly to indicate error
for(int i=0; i<10; i++) {
BSP_LED_Toggle(LED_RED);
HAL_Delay(100);
}
// Reset flags
isSent = 1;
}
}
/* 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_GPDMA1_Init();
MX_UART4_Init();
MX_ICACHE_Init();
MX_USART6_UART_Init();
/* USER CODE BEGIN 2 */
HAL_UART_Receive_DMA(&huart6, EC200_RX, 10);
/* USER CODE END 2 */
/* Initialize leds */
BSP_LED_Init(LED_GREEN);
BSP_LED_Init(LED_YELLOW);
BSP_LED_Init(LED_RED);
/* Initialize USER push-button, will be used to trigger an interrupt each time it's pressed.*/
BSP_PB_Init(BUTTON_USER, BUTTON_MODE_EXTI);
/* Initialize COM1 port (115200, 8 bits (7-bit data + 1 stop bit), no parity */
BspCOMInit.BaudRate = 115200;
BspCOMInit.WordLength = COM_WORDLENGTH_8B;
BspCOMInit.StopBits = COM_STOPBITS_1;
BspCOMInit.Parity = COM_PARITY_NONE;
BspCOMInit.HwFlowCtl = COM_HWCONTROL_NONE;
if (BSP_COM_Init(COM1, &BspCOMInit) != BSP_ERROR_NONE)
{
Error_Handler();
}
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
// if(isSent == 1)
// {
// HAL_UART_Transmit_DMA(&huart6, EC200_TX, strlen((char*)EC200_TX));
// isSent = 0;
// }
if(isSent == 1)
{
TxComplete = 0;
RxComplete = 0;
memset(EC200_RX, 0, sizeof(EC200_RX));
// Send AT command
if (HAL_UART_Transmit_DMA(&huart6, EC200_TX, strlen((char*)EC200_TX)) == HAL_OK)
{
isSent = 0;
}
else
{
// If DMA transmission fails, show error
for(int i=0; i<5; i++) {
BSP_LED_Toggle(LED_YELLOW);
HAL_Delay(200);
}
}
}
// if(RxComplete == 1)
// {
// // Process received data - should be "OK\r\n"
// // Ensure null termination for string functions
// EC200_RX[4] = '\0';
//
// // Forward to debug port
//// BSP_COM_Write(COM1, EC200_RX, 4);
//
// // Reset flag after processing
// RxComplete = 0;
// }
BSP_LED_Toggle(LED_RED);
HAL_Delay(500);
countloop++;
}
}