Posted by dautrevaux on 2016-07-13 12:22

Hi,
Just a few questions:

1. When generating under CubeMX, do you keep “generate in root directory” checked?
2. Where is located the service.h file you want to include?
3. How is it included (with quotes or angle brackets)?
4. When importing your source code, do you copy the files in your project or link to them?

Bernard (Ac6)

Posted by fedex03 on 2016-07-13 18:19

Hi Bernard,

I need your help once again!

Now my problem regards the redirection of printf to UART2.

My MCU is a STM32F103VDT and I use UART2 to print debug on serial console.

On Keil I used this code to redirect the printf trough UART2:

int fputc(int ch, FILE *f)
{
/* Place your implementation of fputc here */
/* e.g. write a character to the USART */

if ((char)ch == ‘\n’) /* Add a LF before \n — LF -> CR LF */
{
HAL_UART_Transmit(&huart2,(uint8_t*)”\r”,1,1);
}

HAL_UART_Transmit(&huart2,(uint8_t*)&ch,1,1); // 1 tick waiting (1ms) enough for 87us/byte at 115200

return ch;
}

But now this code not works when I compile with System WorkBench AC6.

Exploring the forum I found a hint regarding the redirection of UART.

It’s suggest to use this code to redirect the printf (I add my code into the function):

void __io_putchar(uint8_t ch)
{
/* Place your implementation of fputc here */
/* e.g. write a character to the USART */

if ((char)ch == ‘\n’) /* Add a LF before \n — LF -> CR LF */
{
HAL_UART_Transmit(&huart2,(uint8_t*)”\r”,1,1);
}

HAL_UART_Transmit(&huart2,(uint8_t*)&ch,1,1); // 1 tick waiting (1ms) enough for 87us/byte at 115200

//return ch;
}

But this code not works.

Any suggestion?

Thanks