debug STM32F103

Hi Clive,
Thank you for your help
I tried several things but without success

here is my blinky code:

#include "stm32f10x.h"
#include "stm32f10x_rcc.h"
#include "stm32f10x_gpio.h"
#include <stdio.h>

void delay(unsigned int nCount);

GPIO_InitTypeDef GPIO_InitStruct;

void ITM_SendString(char *s)
{
  while(*s)
    ITM_SendChar(*s++);
}
int main (void)
{
        // Enable clock for GPIOA
        RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);

        // Configure PA0 as push-pull output
        GPIO_InitStruct.GPIO_Pin = GPIO_Pin_13;
        GPIO_InitStruct.GPIO_Speed = GPIO_Speed_2MHz;
        GPIO_InitStruct.GPIO_Mode = GPIO_Mode_Out_PP;
        GPIO_Init(GPIOC, &GPIO_InitStruct);
         int i;
  volatile int j;

  ITM_SendString("SWD Testing\r\n");

  printf("Hello World!\r\n");

  i = 0;
        printf("test");
        while (1)
        {
                /* Toggle LED on PA0 */
                // Reset bit will turn on LED (because the logic is interved)
                GPIO_ResetBits(GPIOC, GPIO_Pin_13);
                delay(100);
                // Set bit will turn off LED (because the logic is interved)
                GPIO_SetBits(GPIOC, GPIO_Pin_13);
                delay(100);
                ITM_SendString("0123456789 ");

    if ((i++ & 0x07) == 0x07)
      ITM_SendString("\r\n");

    for(j=0; j<10000000; j++);
                printf("test2");
        }
}

// Delay function
void delay(unsigned int nCount)
{
        unsigned int i, j;

        for (i = 0; i < nCount; i++)
                for (j = 0; j < 0x2AFF; j++);
}

//******************************************************************************
// 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 */
}

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

#ifdef  USE_FULL_ASSERT
/**
  * @brief  Reports the name of the source file and the source line number
  *   where the assert_param error has occurred.
  * @param  file: pointer to the source file name
  * @param  line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t* file, uint32_t line)
{
  /* User can add his own implementation to report the file name and line number,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */

  /* Infinite loop */
  while (1)
  {
  }
}
#endif

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