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uVision printf debugging using STM32F7xx

Hello,

I am having trouble finding a good source to help me set up printf debugging on my project. I am currently using the STM32F7xx series board with uVision and MXCUBE to initialize the project. Most of the sources I find are fairly old and do not seem to work. Is there an updated page I could look at to help me set it up? Thank you for your assistance!

Parents

0 Clive Unspecified over 7 years ago

Pretty sure the usual fputc() code works, you might need to enable access to the ITM registers.

community.st.com/.../147118-stm32f769i-disco-printf-using-itmswo

volatile uint32_t *ITM_LAR = (volatile uint32_t *)0xE0000FB0; // ITM->LAR
*ITM_LAR = 0xC5ACCE55; // Enable Access

//****************************************************************************
// Hosting of stdio functionality through SWV - Serial Wire Viewer
//****************************************************************************

#include <rt_misc.h>

#pragma import(__use_no_semihosting_swi)

struct __FILE { int handle; /* Add whatever you need here */ };
FILE __stdout;
FILE __stdin;

int fputc(int ch, FILE *f)
{
  ITM_SendChar(ch);

  return(ch);
}

int fgetc(FILE *f)
{
  char ch;

  ch = '?';

  return((int)ch);
}

int ferror(FILE *f)
{
  /* Your implementation of ferror */
  return EOF;
}

void _ttywrch(int ch)
{
  ITM_SendChar(ch);
}

void _sys_exit(int return_code)
{
label:  goto label;  /* endless loop */
}

//****************************************************************************

Reply

0 Clive Unspecified over 7 years ago

Pretty sure the usual fputc() code works, you might need to enable access to the ITM registers.

community.st.com/.../147118-stm32f769i-disco-printf-using-itmswo

volatile uint32_t *ITM_LAR = (volatile uint32_t *)0xE0000FB0; // ITM->LAR
*ITM_LAR = 0xC5ACCE55; // Enable Access

//****************************************************************************
// Hosting of stdio functionality through SWV - Serial Wire Viewer
//****************************************************************************

#include <rt_misc.h>

#pragma import(__use_no_semihosting_swi)

struct __FILE { int handle; /* Add whatever you need here */ };
FILE __stdout;
FILE __stdin;

int fputc(int ch, FILE *f)
{
  ITM_SendChar(ch);

  return(ch);
}

int fgetc(FILE *f)
{
  char ch;

  ch = '?';

  return((int)ch);
}

int ferror(FILE *f)
{
  /* Your implementation of ferror */
  return EOF;
}

void _ttywrch(int ch)
{
  ITM_SendChar(ch);
}

void _sys_exit(int return_code)
{
label:  goto label;  /* endless loop */
}

//****************************************************************************

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