The device I am using is F303K8T6.
I am trying to learn. I have no problem with transmitting.
But when it comes to receive data it don't works. Interrupt not rises.
But when I connect tx pin to rx pin it works well. Interrput rised.
The code and concerning images is as following.
void _baslat_(void);
void USART2_IRQHandler(void);
void _yaz_(uint8_t yaz);
char USART_Read(void);
char AAA = 0;
volatile int tetiklendim = 0;
void print_console(char *A){
int i;
for(i=0;A[i]!='\0';i++){
_yaz_(A[i]);
}
}
////////////////////////////////////// inside while loop
while (1)
{
/* USER CODE END WHILE */
if(tetiklendim){
print_console("Data Deteceted\n");
tetiklendim = 0;
}
else{
print_console("Failed to take\n");
}
HAL_Delay(1000);
/* USER CODE
* BEGIN 3 */
}
///////////////////////////////////////
void _baslat_(void){
//Activating Clocks
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_USART2_CLK_ENABLE();
//GPIO
GPIO_InitTypeDef decoy = {0};
decoy.Pin = GPIO_PIN_2|GPIO_PIN_3;
decoy.Alternate = GPIO_AF7_USART2;
decoy.Mode = GPIO_MODE_AF_PP;
decoy.Pull = GPIO_PULLUP;
decoy.Speed = GPIO_SPEED_FREQ_HIGH;
HAL_GPIO_Init(GPIOA,&decoy);
//USART2 settings
USART2->CR1 = 0;
USART2->BRR = (SystemCoreClock)/(9600);
USART2->CR1 |= (1<<5)|(1<<3)|(1<<2);
USART2->CR3 |= (1<<6);
USART2->CR1 |= 1;
//USART2 interrupts
NVIC_EnableIRQ(USART2_IRQn);
NVIC_SetPriority(USART2_IRQn,0);
}
volatile int trig = 0;
void USART2_IRQHandler(void){
trig ^= 1;
tetiklendim = 1;
AAA = USART_Read();
}
void _yaz_(uint8_t yaz){
//while (!(USART2->ISR & USART_ISR_TXE)); // Check to see if transmit data register is empty
USART2->TDR = (yaz & 0xFF); // Load TX data register with ch
int x = GPIOA->AFR;
while (!(USART2->ISR & (1<<6))); // Check to see if transmit data register is empty
}
char USART_Read(void)
{
//while (!(USART2->ISR & (1 << 5))){} // Check to see if recieve data register is empty
return USART2->RDR; // Load TX data register with ch
}
Any idea why I can't receive data through my computer ?
The full code and clock scheme is as follows.
/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file : main.c
* @brief : Main program body
******************************************************************************
* @attention
*
* Copyright (c) 2023 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
void _baslat_(void);
void USART2_IRQHandler(void);
void _yaz_(uint8_t yaz);
char USART_Read(void);
char AAA = 0;
volatile int tetiklendim = 0;
void print_console(char *A){
int i;
for(i=0;A[i]!='\0';i++){
_yaz_(A[i]);
}
}
/* 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 ---------------------------------------------------------*/
/* USER CODE BEGIN PV */
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(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();
_baslat_();
/* 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 */
/* USER CODE BEGIN 2 */
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
if(tetiklendim){
print_console("Data Deteceted\n");
tetiklendim = 0;
}
else{
print_console("Failed to take\n");
}
HAL_Delay(1000);
/* 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};
/** 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_NONE;
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_HSI;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
{
Error_Handler();
}
}
/* USER CODE BEGIN 4 */
void _baslat_(void){
//Activating Clocks
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_USART2_CLK_ENABLE();
//GPIO
GPIO_InitTypeDef decoy = {0};
decoy.Pin = GPIO_PIN_2|GPIO_PIN_3;
decoy.Alternate = GPIO_AF7_USART2;
decoy.Mode = GPIO_MODE_AF_PP;
decoy.Pull = GPIO_PULLUP;
decoy.Speed = GPIO_SPEED_FREQ_HIGH;
HAL_GPIO_Init(GPIOA,&decoy);
//USART2 settings
USART2->CR1 = 0;
USART2->BRR = (SystemCoreClock)/(9600);
USART2->CR1 |= (1<<5)|(1<<3)|(1<<2);
USART2->CR3 |= (1<<6);
USART2->CR1 |= 1;
//USART2 interrupts
NVIC_EnableIRQ(USART2_IRQn);
NVIC_SetPriority(USART2_IRQn,0);
}
volatile int trig = 0;
void USART2_IRQHandler(void){
trig ^= 1;
tetiklendim = 1;
AAA = USART_Read();
}
void _yaz_(uint8_t yaz){
//while (!(USART2->ISR & USART_ISR_TXE)); // Check to see if transmit data register is empty
USART2->TDR = (yaz & 0xFF); // Load TX data register with ch
int x = GPIOA->AFR;
while (!(USART2->ISR & (1<<6))); // Check to see if transmit data register is empty
}
char USART_Read(void)
{
//while (!(USART2->ISR & (1 << 5))){} // Check to see if recieve data register is empty
return USART2->RDR; // Load TX data register with ch
}
/* 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 */
