title: Unable to trigger Systick Interrupt Handler even after enabling TICKINT. Why?
body: <pre><code>    #include "stm32f10x.h"
      #define PIN_PC13     0x2000
      #define ON_BOARD_LED  PIN_PC13
      void LED_Init(void);
  
      int main()
      {
  </code></pre>
  
  <p>Function for Initialising on board LED of STM32F103C8T6</p>
  
  <pre><code>    LED_Init();  
      while(1)
  
      {
  
      }
  
      return 0;
  
      }
  
      void LED_Init()
      {
  </code></pre>
  
  <p>APB bus-2 clock enable ---> Enabled in order to use the peripheral</p>
  
  <pre><code>    RCC-&gt;APB2ENR |= RCC_APB2ENR_IOPCEN; 
  
      GPIOC-&gt;CRH |=GPIO_CRH_MODE13;   
  
      GPIOC-&gt;CRH &amp;= ~(GPIO_CRH_CNF13);
  
      SysTick_Config(800000-1);   
  
      //SysTick-&gt;CTRL |=0x07;
  
     //SysTick-&gt;LOAD =8000000/10 -1;
  
      }
  </code></pre>
  
  <p>Interrupt handler not running why?</p>
  
  <pre><code>    void SysTick_Handler(void)
  
      {
          GPIOC-&gt;ODR ^=ON_BOARD_LED;  // Toggling the on board LED
      }
  </code></pre>