SW4STM32C datasheet(60/99 Pages) STMICROELECTRONICS

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SW4STM32C Datasheet(PDF) 60 Page - STMicroelectronics

Part #	SW4STM32C

Description	STM32 microcontroller debug toolbox

PDF	99 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

Logo

60 / 99 page

Printf debugging

AN4989

60/99

DocID030181 Rev 2

Figure 41. USART2 setting with STM32CubeMX

Retargeting printf to UART depends on the toolchain.

For IAR™ EWARM and Keil® MDK-ARM µVISION this is done by overriding the stdio fputc

function

#include "stdio.h"

int fputc(int ch, FILE *f)

{

HAL_UART_Transmit(&UartHandle, (uint8_t *)&ch, 1, 0xFFFF);

return ch;

}

For GCC based toolset like SW4STM32, two cases can be met.

With syscall.c integrated to the project:

#include "stdio.h"

int __io_putchar(int ch)

{

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