Posted on May 22, 2007 at 15:21Hello everybody,
I'm trying to create a 1ms timer with a STR750 microcontroller.
void TB_Configuration(void)
{
/* TB configuration in Timing mode */
TB_InitStructure.TB_Mode = TB_Mode_Timing;
TB_InitStructure.TB_ClockSource = TB_ClockSource_CKTIM;
TB_InitStructure.TB_Prescaler = 29; /* TB clock = 60MHz / (29 +1) = 2 MHz*/
TB_InitStructure.TB_CounterMode = TB_CounterMode_Up;
TB_InitStructure.TB_AutoReload = 19; /* update each: 2 MHz/(19+1)= 100 KHZ ---> 10 us */
TB_Init(&TB_InitStructure);
TB_ITConfig(TB_IT_Update, ENABLE);/* Enable TB update interrupt */
TB_Cmd(ENABLE); /* Enable TB counter */
}
/* ******************************************* */
.... //EIC ENABLE
/* ******************************************* */
void TB_IRQHandler(void)
{
INC_10us++;
TB_ClearITPendingBit(TB_IT_Update);
}
Works/* ******************************************* */
void WaitClock(u16 time)
{
while (INC_10us < time)
{
Here is the problem print('' INC_10us: %d \r'',INC_10us);[/B] // Raisonance print
}
INC_10us = 0; //Reset counter
}
/* ******************************************* */
main
{
... // INIT
while(1)
{
WaitClock(100); // Wait 10 * 100us = 1ms
}
}
ProblemIn the function WaitClock, when I don't use the function print, i'm stuck in the while of the function.
When I use the function print, it works, but the timer is a 20 ms timer instead of a 1 ms timer.
Of course, I'd prefer not to use the function print.
Is there an obvious mistake ?
Did anyone have the same problem ?
Thank you again.
-Xavier
