STM32F401RE-Nucleo Uart Problem

[HoYa Kim]

Posted on January 12, 2018 at 06:09

I'm using a stm32f401re-nucleo board and I build a project on ubuntu through arm-none-eabi-gcc compiler.

Here is my code for uart.

This code initializes uart.

void UartInit(void) { 
 hUart2.Instance = USARTx;
 hUart2.Init.BaudRate = 115200;
 hUart2.Init.WordLength = UART_WORDLENGTH_8B;
 hUart2.Init.StopBits = UART_STOPBITS_1;
 hUart2.Init.Parity = UART_PARITY_NONE;
 hUart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
 hUart2.Init.Mode = UART_MODE_TX_RX;
 hUart2.Init.OverSampling = UART_OVERSAMPLING_16;
 HAL_UART_Init(&hUart2);
 setvbuf(stdout, NULL, _IONBF, 0);
}
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void HAL_UART_MspInit(UART_HandleTypeDef* huart) {
 (void)huart;
 GPIO_InitTypeDef GPIO_InitStruct;
 USARTx_TX_GPIO_CLK_ENABLE();
 USARTx_RX_GPIO_CLK_ENABLE();
 USARTx_CLK_ENABLE();
 GPIO_InitStruct.Pin = USARTx_TX_PIN;
 GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
 GPIO_InitStruct.Pull = GPIO_PULLUP;
 GPIO_InitStruct.Speed = GPIO_SPEED_FAST;
 GPIO_InitStruct.Alternate = USARTx_TX_AF;
 HAL_GPIO_Init(USARTx_TX_GPIO_PORT, &GPIO_InitStruct);
 GPIO_InitStruct.Pin = USARTx_RX_PIN;
 GPIO_InitStruct.Alternate = USARTx_RX_AF;
 HAL_GPIO_Init(USARTx_RX_GPIO_PORT, &GPIO_InitStruct);
 HAL_NVIC_SetPriority(USARTx_IRQn, 0, 1);
 HAL_NVIC_EnableIRQ(USARTx_IRQn);
}
void HAL_UART_MspDeInit(UART_HandleTypeDef* huart) {
 (void)huart;
 USARTx_FORCE_RESET();
 USARTx_RELEASE_RESET();
 HAL_GPIO_DeInit(USARTx_TX_GPIO_PORT, USARTx_TX_PIN);
 HAL_GPIO_DeInit(USARTx_RX_GPIO_PORT, USARTx_RX_PIN);
 HAL_NVIC_DisableIRQ(USARTx_IRQn);
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This code is for retargetting printf.

#ifdef __GNUC__
 #define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
 #define GETCHAR_PROTOTYPE int __io_getchar(void)
#else
 #define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
 #define GETCHAR_PROTOTYPE int fgetc(FILE* f)
#endif
PUTCHAR_PROTOTYPE {
 HAL_UART_Transmit(&hUart2, (uint8_t*)&ch, 1, 0xffff);
 return ch;
}
GETCHAR_PROTOTYPE {
 int ch;
 HAL_UART_Receive(&hUart2, (uint8_t*)&ch, 1, 0xffff);
 return ch;
}
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This code is for interrupt handler.

void USARTx_IRQHandler(void)
{
 HAL_UART_IRQHandler(&hUart2);
}
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Now, I can use puts, putchar, printf, getchar, HAL_UART_Transmit. However I can't use gets, HAL_UART_Transmit_IT.

But, I build a same code on IAR compiler, it works well except gets.

Only on gcc, after call a HAL_UART_Transmit_IT function, my board has stucked.

How can I use these two function gets, HAL_UART_Transmit_IT on gcc.

Help me, plz.

#uart #arm-none-eabi-gcc #stm32f401re #nucleo