Posted on October 17, 2010 at 11:32hi i am trying to activate the Tim2 Interrupt but for some reason it does not work here is the program i wrote:
#include ''stm32F10x.h''
void setsystemclock(void);
void TIM2_IRQHandler(void);
int main(void)
{
setsystemclock(); //set system clock to 24Mhz
//rcc configuration
RCC->APB1ENR=RCC_APB1RSTR_TIM2RST;//tim2 enable
RCC->APB2ENR=RCC_APB2ENR_IOPCEN;//portc Clock enable
//nvic configuration
NVIC_EnableIRQ(TIM2_IRQn);
//GPIO configuration
GPIOC->CRL=0x33000000;//ports 6,7 as fast output
GPIOC->CRH=0x33;//ports 8,9 as fast output
//tim Configuration
TIM2->ARR=65535;
TIM2->EGR=TIM_EGR_UG;/*!<Update Generation */
TIM2->CCMR1=0;
TIM2->CCR1=40961;
TIM2->CCER=TIM_CCER_CC1E; /*!<Capture/Compare 1 output enable */
TIM2->CCMR1=0;
TIM2->DIER=TIM_DIER_CC1IE ;/*!<Capture/Compare 1 interrupt enable */
TIM2->CR1=TIM_CR1_CEN;/*!<Counter enable */
while(1)
{
}
}
void TIM2_IRQHandler(void)
{
TIM2->SR=~TIM_SR_CC1IF; //Clears the TIMx's interrupt pending bits.
GPIOC->ODR^=0xC0;
}
void setsystemclock(void)
{
RCC->CR |= RCC_CR_HSEON;
// Wait until it's ready
while ((RCC->CR & RCC_CR_HSERDY) == 0)
;
// Select PREDIV1 as PLL source and sett PLL mul to 3 (set bit 0)
// for 8*3 = 24 MHz
RCC->CFGR |= RCC_CFGR_PLLSRC | RCC_CFGR_PLLMULL_0;
// Start PLL
RCC->CR |= RCC_CR_PLLON;
// Wait until it's ready
while ((RCC->CR & RCC_CR_PLLRDY) == 0)
;
// Select PLL as system clock
RCC->CFGR |= RCC_CFGR_SW_PLL;
// Here we can check if PLL is used, and maybe disable HSI
// Disable HSI
RCC->CR &= ~RCC_CR_HSION;
RCC->CFGR|=RCC_CFGR_MCO_2; //sys clock output
}
what did i do wrong?
thanks for your help.
i get the following error:
BusFault_Handler:
DebugMon_Handler:
HardFault_Handler:
MemManage_Handler:
NMI_Handler<26731 (failed: LoadStrW)>:
0x800018c: 0xe7fe B.N BusFault_Handler ; 0x800018c
0x800018e: 0xffff DC16 65535 ; '..'
0x8000190: 0xffffffff MRC2 p15, #7, pc, c15, c15, #7
0x8000194: 0xffffffff MRC2 p15, #7, pc, c15, c15, #7
0x8000198: 0xffffffff MRC2 p15, #7, pc, c15, c15, #7
0x800019c: 0xffffffff MRC2 p15, #7, pc, c15, c15, #7
0x80001a0: 0xffffffff MRC2 p15, #7, pc, c15, c15, #7
0x80001a4: 0xffffffff MRC2 p15, #7, pc, c15, c15, #7
