Systick not working???

[pritz1]

Posted on October 11, 2011 at 19:55

Hello,

I am trying to integrate the SysTick example into some code that I am developing and I can't seem to get it to work.  I even tried just pulling the code from the example and loading it onto the microcontroller and it still doesn't seem to work.  I am missing something very basic, I am sure.  I believe that the TimingDelay_Decrement function is not being associated with the interrupts.  Below is the code I am trying to run.  It seems to hang on the first Delay call./**  ******************************************************************************  * @file    SysTick/main.c  * @author  MCD Application Team  * @version V1.0.0  * @date    09/13/2010  * @brief   Main program body.  ******************************************************************************  * @copy  *  * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS  * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE  * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY  * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING  * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE  * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.  *  * <h2><center>&copy; COPYRIGHT 2010 STMicroelectronics</center></h2>  *//* Includes ------------------------------------------------------------------*/#include ''stm32f10x.h''#include ''STM32vldiscovery.h''/** @addtogroup Examples  * @{  *//* Private typedef -----------------------------------------------------------*//* Private define ------------------------------------------------------------*//* Private macro -------------------------------------------------------------*//* Private variables ---------------------------------------------------------*/static __IO uint32_t TimingDelay;void TimingDelay_Decrement(void);/* Private function prototypes -----------------------------------------------*/void Delay(__IO uint32_t nTime);/* Private functions ---------------------------------------------------------*//**  * @brief  Main program.  * @param  None  * @retval None  */int main(void){  /*!< At this stage the microcontroller clock setting is already configured,       this is done through SystemInit() function which is called from startup       file (startup_stm32f10x_xx.s) before to branch to application main.       To reconfigure the default setting of SystemInit() function, refer to       system_stm32f10x.c file     */  /* Initialize Leds LD3 and LD4 mounted on STM32VLDISCOVERY board */  STM32vldiscovery_LEDInit(LED3);  STM32vldiscovery_LEDInit(LED4);  /* Turn on LD3 and LD4 */  STM32vldiscovery_LEDOn(LED3);  STM32vldiscovery_LEDOn(LED4);  /* Setup SysTick Timer for 1 msec interrupts  */  if (SysTick_Config(SystemCoreClock / 1000))  {    /* Capture error */    while (1)    {    STM32vldiscovery_LEDOff(LED3);    STM32vldiscovery_LEDOff(LED4);    }  }  while (1)  {    /* Toggle LD3 */    STM32vldiscovery_LEDToggle(LED3);    /* Insert 50 ms delay */    Delay(50);    /* Toggle LD4 */   STM32vldiscovery_LEDToggle(LED4);    /* Insert 100 ms delay */    Delay(100);  }}/**  * @brief  Inserts a delay time.  * @param  nTime: specifies the delay time length, in milliseconds.  * @retval None  */void Delay(__IO uint32_t nTime){  TimingDelay = nTime;  while(TimingDelay != 0);}/**  * @brief  Decrements the TimingDelay variable.  * @param  None  * @retval None  */void TimingDelay_Decrement(void){  if (TimingDelay != 0x00)  {    TimingDelay--;  }}#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/**  * @}  *//******************* (C) COPYRIGHT 2010 STMicroelectronics *****END OF FILE****/

[pritz1]

Posted on October 12, 2011 at 00:28

Nevermind - I figured it out.  I had to put:

TimingDelay_Decrement(void);in the Systick handler:void SysTick_Handler(void)in the file stm32f10x_it.cHope this helps other people.