Estou usando o LPC2148 pra fazer uns testes. No manual diz que é possÃvel gerar um interrupção no match0 do PWM, então fiz o código abaixo:
- Código: Selecionar todos
#include <LPC21XX.H>
void pwmISR(void) __irq;
int count=0;
int main(void)
{
count = 0;
PINSEL0 |= 0x00028000; //Enable pin 0.7 as PWM2
PWMPR = 0x00000000; //Load prescaler
PWMPCR = 0x0000400; //PWM channel 2 single edge control, output enabled
PWMMCR = 0x00000003; //On match with timer reset the counter, generates interrupts
PWMMR0 = 0x00000960; //set cycle rate to 2400 ticks
PWMMR1 = 0x00000000; //set rising edge of PWM2 to 0 ticks
PWMMR2 = 0x00000480; //set falling edge of PWM2 to 1200 ticks
PWMLER = 0x00000007; //enable shadow latch for match 0 - 2
PWMTCR = 0x00000002; //Reset counter and prescaler
PWMTCR = 0x00000009; //enable counter and PWM, release counter from reset
VICVectCntl0 = 0x0000002F; //select a priority slot for a given interrupt
VICVectAddr0 = (unsigned)pwmISR; //pass the address of the IRQ into the VIC slot
VICIntEnable = 0x00000100; //enable interrupt
while(1) ;
}
void pwmISR(void) __irq {
count++;
PWMIR = 0x0001;
}
Na tela peripherals do uVision4.0 o PWM está funcionando, a int está sendo gerada mas não desvia para a minha rotina de tratamento. Onde estou errando?
All_bs.
