system tick timer - my program freezes

[mehmet.karakaya]

Posted on September 27, 2010 at 09:35

system tick timer - my program freezes

[kashif]

Posted on May 17, 2011 at 14:09

your function 

SysTick_Config () is not working properly

use this for sysTick initialization

int main(void)

{

  /* SysTick end of count event each 10ms with input clock equal to 9MHz (HCLK/8, default) */

  SysTick_SetReload(90000);

  /* Enable SysTick interrupt */

  SysTick_ITConfig(ENABLE);

  /* Enable the SysTick Counter */

  SysTick_CounterCmd(SysTick_Counter_Enable);

}

in stm32f10x_it.c-----------------------------void SysTick_Handler(void){TIMERJOB=1;}

regards.

[kashif]

Posted on May 17, 2011 at 14:09

for 100ms

 SysTick_SetReload(900000);

[mehmet.karakaya]

Posted on May 17, 2011 at 14:09

hello thank you

which include file shall I include for the functions you mentioned ?

[mehmet.karakaya]

Posted on May 17, 2011 at 14:09

nobody knows anything about system_tick ?

[trevor23]

Posted on May 17, 2011 at 14:09

To find what header to include get your IDE (or windows) to search for the function name in you project ( filter = *.h). This is something we all do all the time. This function is in the ST library.

[mehmet.karakaya]

Posted on May 17, 2011 at 14:09

can anybody comment why my first message example doesnot work ?

[mehmet.karakaya]

Posted on May 17, 2011 at 14:09

the source code of systick_config is not written by me

it is a function from ST library all I do is to call systick_config function to set the tick to 100 milisecond and making a variable ''1'' in the systick_handler ISR please look my first message ( kashif ' s code is giving error becouse his functions not available in the ST library )

[trevor23]

Posted on May 17, 2011 at 14:09

As kashif87 already said it must be your systick_config function that is wrong. But since you have not provided your function there is no way for us to help you. Please provide the source and I will try to help.

Trevor

[Tesla DeLorean]

Posted on May 17, 2011 at 14:09

They are functions from the V2.x library, the current one inlines Systick_Config()

But for goodness sake, how hard is it to code a simple Systick example, and post the complete source? The problem is probably in code you aren't showing, because this works just fine on the VL discovery board with Keil. /******************************************************************************/ #include ''stm32F10x.h'' #include ''STM32vldiscovery.h'' /******************************************************************************/ volatile int TIMERJOB = 0; // needs to be volatile void SysTick_Handler(void) {   TIMERJOB = 1; } /******************************************************************************/ int main(void) {   int led;   /* Initialise LEDs LD3&LD4, both off */   STM32vldiscovery_LEDInit(LED3);   STM32vldiscovery_LEDInit(LED4);   STM32vldiscovery_LEDOff(LED3);   STM32vldiscovery_LEDOff(LED4);   /* Setup SysTick Timer for 100 msec interrupts  */   if (SysTick_Config(SystemCoreClock / 10))   {     /* Capture error */     while (1);   }   TIMERJOB = 0;   led = 0;   /* main while */   while(1)   {     if (TIMERJOB == 1)     {       TIMERJOB = 0;       led ^= 1;       if (led)         STM32vldiscovery_LEDOff(LED3);       else         STM32vldiscovery_LEDOn(LED3);     }   }   /* does not exit - kind of important */ } /******************************************************************************/ #ifdef  USE_FULL_ASSERT 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 /******************************************************************************/