UART RECEIVE PROBLEM / STM32G061C6

thegentdev · ‎2021-09-09

Hi all,

I am using a STM32G061C6T6 MCU. I'm trying to contact Nextion HMI. My data sending is successful, but I can't get any data. I couldn't run any of the Pooling and interrupt methods when receiving data. When I follow the RX pin with the oscilloscope, the data comes, but I can't read it with MCU.

I tried the display on the Nucleo-F103RB card with a simple HAL code. I can read the data from the screen. Do I need to do a special operation on this MCU(STM32G061C6) to be able to read with UART? I'd appreciate it if you could help me.

#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 ---------------------------------------------------------*/
UART_HandleTypeDef huart1;
 
/* USER CODE BEGIN PV */
uint8_t nextion_rx[10];
/* USER CODE END PV */
 
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_USART1_UART_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_USART1_UART_Init();
  /* USER CODE BEGIN 2 */
  HAL_GPIO_WritePin(GPIOB, GPIO_PIN_5, GPIO_PIN_SET);
  /* USER CODE END 2 */
 
  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
 
  HAL_UART_Receive(&huart1, (uint8_t *)nextion_rx, 10, 1000);
 
    /* USER CODE END WHILE */
 
    /* USER CODE BEGIN 3 */
  }
  /* USER CODE END 3 */
}

Bruno_ST · ‎2021-09-09

Hello @Fatih Erdoğan

Do you have the floowing line of code in bold in stm32g0xx_hal_msp.c ?

/**USART1 GPIO Configuration

PA9 ------> USART1_TX

PA10 ------> USART1_RX

*/

GPIO_InitStruct.Pin = GPIO_PIN_9|GPIO_PIN_10;

GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;

GPIO_InitStruct.Pull = GPIO_NOPULL;

GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;

GPIO_InitStruct.Alternate = GPIO_AF1_USART1;

HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

If not, please add it.

BR,

Bruno

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Bruno_ST · ‎2021-09-09