How can I enable TDR register and Five bytes data transmit in UART_DMA?

[mrsmile]

Hi, I am using STM32G030K6T6 Microcontroller. I need a help for how can i Enable TDR Register and handle the interrupt handler. interrupt handler does not run and I need is Five Bytes data transmit in Uart_DMA. But registers does not wrk properly. I made a mistake anywhere please guide me. I include my code.

#include "main.h"
 
/* USER CODE BEGIN PV */
uint32_t data[5]={0x00,0x01,0x03,0x05,0x02}; uint16_t tim=0;
/* USER CODE END PV */
 
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
/* USER CODE BEGIN PFP */
 
void Tim3_Init(void)
{
	RCC->APBENR1 |= RCC_APBENR1_TIM3EN;  // TIM3 timer clock enable
	
	TIM3->PSC = 2;
	TIM3->ARR = 22999;
	TIM3->CNT = 0;
	
	TIM3->DIER |= TIM_DIER_UIE;  //Update interrupt enable
	NVIC_EnableIRQ(TIM3_IRQn);  //Interrupt enable
	
	TIM3->CR1 |=TIM_CR1_CEN;  //COUNTER ENABLE
	TIM3->EGR |= TIM_EGR_UG;  //Update generation
}
 
void UART2_Init(void)
{
	RCC->APBENR1 |= RCC_APBENR1_USART2EN;  // USART2 clock enable
	RCC->IOPENR |= RCC_IOPENR_GPIOAEN;  // I/O port A clock enable
	
	GPIOA->MODER &= ~(GPIO_MODER_MODE2);  // clear 2th pin
	GPIOA->MODER |= (GPIO_MODER_MODE2_1);  // 10: Alternate function mode
	
	GPIOA->MODER &= ~(GPIO_MODER_MODE3);  // clear 3th pin
	GPIOA->MODER |= (GPIO_MODER_MODE3_1);  // 10: Alternate function mode
	
	GPIOA->AFR[0];
	GPIOA->OTYPER |= (0<<2);             // output_pushpull
	USART2->CR1 |= USART_CR1_TE;
  USART2->CR3 |= USART_CR3_DMAT;      // DMA TX_ENABLE FOR USART2
	USART2->BRR |= 0X1D4B;             // BAUDRATE
	USART2->CR1 |= USART_CR1_UE;        //USART_ENABLE
}
void DMA_Init(void)
{
	RCC->AHBENR |= RCC_AHBENR_DMA1EN;  //DMA1_MUX_CLK_Enable
	
//	SYSCFG->IT_LINE_SR = SYSCFG_ITLINE9_SR_DMA1_CH1;
	
	DMA1_Channel1->CCR |= DMA_CCR_MINC | DMA_CCR_TCIE | DMA_CCR_DIR | DMA_CCR_CIRC | DMA_CCR_TEIE | DMA_CCR_HTIE ;  // MEMORY_INC, TX_COMP_INT, DATA_TX_DIR, CIRCULAR_MODE
	
	DMA1_Channel1->CPAR = (uint32_t)&USART2->TDR;
	
	DMA1_Channel1->CNDTR=5;
	
	DMA1_Channel1->CCR|= DMA_CCR_EN;
	
	NVIC_EnableIRQ(DMA1_Channel1_IRQn);
 
}
void tx(char tx_data)
{
  USART1->TDR= tx_data;
  while(!(USART2->ISR & (1<<6)));
}
void DMA_transmit(char data, uint8_t size)
{
		DMA1->IFCR |= DMA_IFCR_CTCIF1;     // channel tx complete clear
 
	  DMA1_Channel1->CMAR =(uint32_t)data;
}
/* 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();
  /* USER CODE BEGIN 2 */
	
	Tim3_Init();
  UART2_Init();DMA_Init();
  /* USER CODE END 2 */
 
  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
    /* USER CODE END WHILE */
 
    /* USER CODE BEGIN 3 */
  }
  /* USER CODE END 3 */
}
void DMA1_Channel1_IRQHandler(void)
{
	while((DMA1->ISR & DMA_ISR_TCIF1)==0);
	
	DMA1_Channel1->CMAR =(uint32_t)data;
	
	DMA1->IFCR =DMA_IFCR_CTCIF1;    // channel tx complete clear
 
}
 
/**
  * @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_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1);
 
  /** 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.HSIDiv = RCC_HSI_DIV1;
  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
  RCC_OscInitStruct.PLL.PLLM = RCC_PLLM_DIV1;
  RCC_OscInitStruct.PLL.PLLN = 8;
  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
  RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;
  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_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
 
  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
  {
    Error_Handler();
  }
}
 
/**
  * @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_GPIOA_CLK_ENABLE();
 
  /*Configure GPIO pin : PC15 */
  GPIO_InitStruct.Pin = GPIO_PIN_15;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  GPIO_InitStruct.Alternate = GPIO_AF1_OSC;
  HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
 
}
 
/* USER CODE BEGIN 4 */
 
void TIM3_IRQHandler(void)
{
	TIM3->SR &= ~TIM_SR_UIF;	
	        tim++;
}
 
/* 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 */
  __disable_irq();
  while (1)
  {
  }
  /* 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,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */