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attempt uart printf

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Ajit Ananthadevan 2025-08-24 10:01:32 +10:00
parent 63bef1cd68
commit 84d00d8178
1 changed files with 19 additions and 9 deletions
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28
myapps/practice/00-uart-tx/src/main.c
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@ -1,25 +1,34 @@
// Tx/Rx: PA09[PA11]/PA10[PA12] // Tx/Rx: PA09[PA11]/PA10[PA12]
//#include <string.h> //#include <string.h>
//#include <stdio.h>
#include "stm32g0xx_hal_msp.h" #include "stm32g0xx_hal_msp.h"
UART_HandleTypeDef huart1; UART_HandleTypeDef huart1;
char buffer[] = "Hello World\r\n"; char buffer[] = "Hello World\r\n";
#define TXBUFFERSIZE 14 //strlen(buffer) #define TXBUFFERSIZE 14 //strlen(buffer)
#define TIMEOUT 1000 //right val? #define TIMEOUT 0xFFFF
/*
int __io_putchar(int ch)
{
HAL_UART_Transmit(&huart1, (uint8_t *)&ch, 1, TIMEOUT);
return ch;
}
*/
/*
setvbuf(stout, NULL, _IOLBF, 0);
int _write (int file, const void * ptr, size_t len)
{
HAL_UART_Transmit(&huart1, ptr, len, TIMEOUT);
return len;
}
*/
static void uart_init(void) static void uart_init(void)
{ {
/* USER CODE BEGIN USART1_Init 0 */ huart1.Instance = USART1; // Defined in CMSIS header as peripheral address
/* USER CODE END USART1_Init 0 */
/* USER CODE BEGIN USART1_Init 1 */
/* USER CODE END USART1_Init 1 */
huart1.Instance = USART1;
huart1.Init.BaudRate = 115200; huart1.Init.BaudRate = 115200;
huart1.Init.WordLength = UART_WORDLENGTH_8B; huart1.Init.WordLength = UART_WORDLENGTH_8B;
huart1.Init.StopBits = UART_STOPBITS_1; huart1.Init.StopBits = UART_STOPBITS_1;
@ -44,6 +53,7 @@ int main(void)
while(1) while(1)
{ {
HAL_UART_Transmit(&huart1, (uint8_t *)buffer, TXBUFFERSIZE, TIMEOUT); HAL_UART_Transmit(&huart1, (uint8_t *)buffer, TXBUFFERSIZE, TIMEOUT);
//printf("Hello World\r\n");
HAL_Delay(100); HAL_Delay(100);
} }
} }