#define DEBUG_UART USART2
#define DEBUG_UART_CLK RCC_APB1Periph_USART2
#define DEBUG_UART_TX_GPIO_CLK RCC_AHB1Periph_GPIOA
#define DEBUG_UART_TX_PIN GPIO_Pin_2
#define DEBUG_UART_TX_GPIO_PORT GPIOA
#define DEBUG_UART_RX_GPIO_CLK RCC_AHB1Periph_GPIOA
#define DEBUG_UART_RX_PIN GPIO_Pin_3
#define DEBUG_UART_RX_GPIO_PORT GPIOA
#define DEBUG_UART_BaudRate 115200
static void USARTConfig(){
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
RCC_AHB1PeriphClockCmd(DEBUG_UART_TX_GPIO_CLK | DEBUG_UART_RX_GPIO_CLK , ENABLE);
RCC_APB1PeriphClockCmd(DEBUG_UART_CLK, ENABLE);
GPIO_InitStructure.GPIO_Pin = DEBUG_UART_TX_PIN;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_Init(DEBUG_UART_TX_GPIO_PORT, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = DEBUG_UART_RX_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_Init(DEBUG_UART_RX_GPIO_PORT, &GPIO_InitStructure);
USART_InitStructure.USART_BaudRate = DEBUG_UART_BaudRate;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No ;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init(DEBUG_UART, &USART_InitStructure);
USART_ClearFlag(DEBUG_UART, USART_FLAG_RXNE | USART_FLAG_TC);
USART_Cmd(DEBUG_UART, ENABLE);
}
int fputc(int ch, FILE *f){
while(USART_GetFlagStatus(USART2, USART_FLAG_TXE)==RESET);
USART_SendData(USART2,(uint8_t) ch);
while(USART_GetFlagStatus(USART2, USART_FLAG_TC)==RESET);
return ch;
}
For some reasons, I have to learn to use std library and I have tried to fix the problem but failed. When debugging, the fputc function is called properly but no output is received by my PC while I can do that with another version with HAL Library.
The project is rewrited from ST official std library template for stm32f446xx.
