#include <stm32f10x_lib.h>              /* STM32F10x Library Definitions      */

unsigned char Clock1s;

/* SysTick interrupt happens every 10 ms                                      */
void SysTick_Handler (void)
 {
  static unsigned long ticks;
  if (ticks++ >= 99)
   {                  /* Set Clock1s to 1 every 1 second    */
    ticks   = 0;
    Clock1s = 1;
   }	
  			
 }