.......STM8L......TIM4不能预装载什么问题求各位大哥指教

KFC · 发表于 2012-11-21 12:34:50

#include <iostm8l152c6.h>

void IO_init()
{
PE_DDR |= MASK_PE_DDR_DDR7;
PE_CR1 |= MASK_PE_CR1_C17;
//Push-pull output PE7(LED)
}
void TIM4_init()
{
CLK_CKDIVR = 0X00;                      //f(sysclk) = 16MHZ
CLK_PCKENR1 |= 0X04;                    //Open TIM4's peripheral clk gating
// TIM4_EGR |= MASK_TIM4_EGR_UG;
TIM4_PSCR |= 0X0F;                      //Prescaler value 2;
TIM4_IER |= MASK_TIM4_IER_UIE;           //Update interrupt enabled
//TIM4_CNTR = 0XF0;                      // Setting from 0XF0 to start counting
TIM4_ARR = 0XF0;                         //Auto-reload value 0XF0;
TIM4_CR1 |= MASK_TIM4_CR1_ARPE | MASK_TIM4_CR1_OPM;
//Buffered through a preload register ; CEN=0 as soon as generation update event
}
int main( void )
{
IO_init();
TIM4_init();
asm("rim");                            //Open global interrupt
TIM4_CR1 |= MASK_TIM4_CR1_CEN;         //Start count
while(1);
}
#pragma vector = TIM4_UIF_vector
__interrupt void TIM4_UIF_ISR(void)
{

   TIM4_SR1 &= ~MASK_TIM4_SR1_UIF;
   PE_ODR =~PE_ODR;
   TIM4_CR1 |= MASK_TIM4_CR1_CEN;         //Start count
}