oo: oo:
void tim0_isr (void) __irq
{
if ((led ^=1) == 0)
AT91F_PIO_ClearOutput(AT91C_BASE_PIOC, HEARTBT_OUTPUT); /* LED OFF */
else
AT91F_PIO_SetOutput (AT91C_BASE_PIOC, HEARTBT_OUTPUT); /* LED ON */
AT91C_BASE_AIC->AIC_EOICR = AT91C_BASE_TC0->TC_SR; /* Interrupt Ack*/
AT91C_BASE_AIC->AIC_ICCR = (1 << AT91C_ID_TC0); /* Interrupt Ack*/
*AT91C_AIC_EOICR = 0; /* End of Interrupt*/
}
void timer_init()
{
AT91F_PMC_EnablePeriphClock(AT91C_BASE_PMC, 1 << AT91C_ID_TC0); /* Enable Clock for TIM0*/
AT91C_BASE_TC0->TC_CCR = AT91C_TC_CLKEN | AT91C_TC_SWTRG;
AT91C_BASE_TC0->TC_CMR = 4 | AT91C_TC_CPCTRG;
AT91C_BASE_TC0->TC_RC = 46875; /* period is 1 Sec*/
AT91C_BASE_TC0->TC_IER = AT91C_TC_CPCS;
/* TIM0 Interrupt: Mode and Vector with Lowest Priority and Enable */
AT91C_BASE_AIC->AIC_SMR[AT91C_ID_TC0] = AT91C_AIC_SRCTYPE_INT_POSITIVE_EDGE | 5;
AT91C_BASE_AIC->AIC_SVR[AT91C_ID_TC0] = (unsigned long) tim0_isr;
AT91C_BASE_AIC->AIC_IECR = (1 << AT91C_ID_TC0);
}
// PIOA ISR
void isr_pioa(void)
{
static unsigned int nCntr = 0;
nCntr++;
}
// Main
int main()
{
// Setup PIO
AT91F_PMC_EnablePeriphClock(AT91C_BASE_PMC, 1 << AT91C_ID_PIOA); // Enable clock
AT91F_PIO_CfgInput(AT91C_BASE_PIOA, AT91C_PIO_PA15); // Input on PA15
AT91F_PIO_InterruptEnable(AT91C_BASE_PIOA, AT91C_PIO_PA15); // Interrupt on PA15
// Setup interrupts
AT91F_AIC_ConfigureIt(AT91C_BASE_AIC, AT91C_ID_PIOA, AT91C_AIC_PRIOR_LOWEST, 0, isr_pioa);
AT91F_AIC_EnableIt(AT91C_BASE_AIC, AT91C_ID_PIOA);
while(1);
}
void tim0_isr (void) __irq
{
if ((led ^=1) == 0)
AT91F_PIO_ClearOutput(AT91C_BASE_PIOC, HEARTBT_OUTPUT); /* LED OFF */
else
AT91F_PIO_SetOutput (AT91C_BASE_PIOC, HEARTBT_OUTPUT); /* LED ON */
AT91C_BASE_AIC->AIC_EOICR = AT91C_BASE_TC0->TC_SR; /* Interrupt Ack*/
AT91C_BASE_AIC->AIC_ICCR = (1 << AT91C_ID_TC0); /* Interrupt Ack*/
*AT91C_AIC_EOICR = 0; /* End of Interrupt*/
}
void timer_init()
{
AT91F_PMC_EnablePeriphClock(AT91C_BASE_PMC, 1 << AT91C_ID_TC0); /* Enable Clock for TIM0*/
AT91C_BASE_TC0->TC_CCR = AT91C_TC_CLKEN | AT91C_TC_SWTRG;
AT91C_BASE_TC0->TC_CMR = 4 | AT91C_TC_CPCTRG;
AT91C_BASE_TC0->TC_RC = 46875; /* period is 1 Sec*/
AT91C_BASE_TC0->TC_IER = AT91C_TC_CPCS;
/* TIM0 Interrupt: Mode and Vector with Lowest Priority and Enable */
AT91C_BASE_AIC->AIC_SMR[AT91C_ID_TC0] = AT91C_AIC_SRCTYPE_INT_POSITIVE_EDGE | 5;
AT91C_BASE_AIC->AIC_SVR[AT91C_ID_TC0] = (unsigned long) tim0_isr;
AT91C_BASE_AIC->AIC_IECR = (1 << AT91C_ID_TC0);
}
#include "AT91SAM7X256.h"
#include "lib_AT91SAM7X256.h"
#include "delay.h"
#include "lcd4bit.h"
//********************
char buf[35];
int count=3;
//*************************interrupt rutine********************
void isr_pi_ob(void)
{
count++;
}
//****************************************8
main(void){
// Setup PIO
AT91F_PMC_EnablePeriphClock(AT91C_BASE_PMC, 1 << AT91C_ID_PIOB); // Enable clock
AT91F_PIO_CfgInput(AT91C_BASE_PIOB, AT91C_PIO_PB12); // Input on PA15
AT91F_PIO_InterruptEnable(AT91C_BASE_PIOB, AT91C_PIO_PB12); // Interrupt on PA15
// Setup interrupts
AT91F_AIC_ConfigureIt(AT91C_BASE_AIC, AT91C_ID_PIOB, AT91C_AIC_PRIOR_LOWEST, 0, isr_pi_ob);
AT91F_AIC_EnableIt(AT91C_BASE_AIC, AT91C_ID_PIOB);
//*********lcd_initial*************
lcd_pin(2,0,1,2,3,4,5);
//**********************************
while(1){
//lcd_clear();
//sprintf(buf,"counter is=%d",count);
//lcd_putsf(buf);
//delay_ms(100);
}//end of while(1)
}
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