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preliminary interrupts. looks like it is entering the isr but isn't

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leaving correctly.
This commit is contained in:
Mariano Alvira 2009-04-20 18:31:13 -04:00
parent 28c1ed2105
commit 09b15558a1
15 changed files with 89 additions and 26 deletions
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52
tests/tmr-ints.c
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@ -47,12 +47,40 @@
#define reg16(x) (*(volatile uint16_t *)(x))
#include "embedded_types.h"
#include "sys-interrupt.h"
#include "isr.h"
volatile uint8_t led;
#define LED_VAL 0x00000300
#define led_init() do { reg32(GPIO_PAD_DIR0) = LED_VAL; } while(0);
#define led_on() do { led = 1; reg32(GPIO_DATA0) = LED_VAL; } while(0);
#define led_off() do { led = 0; reg32(GPIO_DATA0) = 0x00000000; } while(0);
void toggle_led(void) {
if(0 == led) {
led_on();
led = 1;
} else {
led_off();
}
}
void tmr_isr(void) {
toggle_led();
reg16(TMR0_SCTRL) = 0;
reg16(TMR0_CSCTRL) = 0x0040; /* clear compare flag */
}
__attribute__ ((section ("startup")))
void main(void) {
/* pin direction */
reg32(GPIO_PAD_DIR0) = 0x00000400;
led_init();
/* timer setup */
/* CTRL */
@ -66,7 +94,8 @@ void main(void) {
#define OUT_MODE 0 /* OFLAG is asserted while counter is active */
reg16(TMR_ENBL) = 0; /* tmrs reset to enabled */
reg16(TMR0_SCTRL) = 0;
reg16(TMR0_SCTRL) = 0;
reg16(TMR0_CSCTRL) =0x0040;
reg16(TMR0_LOAD) = 0; /* reload to zero */
reg16(TMR0_COMP_UP) = 18750; /* trigger a reload at the end */
reg16(TMR0_CMPLD1) = 18750; /* compare 1 triggered reload level, 10HZ maybe? */
@ -74,19 +103,12 @@ void main(void) {
reg16(TMR0_CTRL) = (COUNT_MODE<<13) | (PRIME_SRC<<9) | (SEC_SRC<<7) | (ONCE<<6) | (LEN<<5) | (DIR<<4) | (CO_INIT<<3) | (OUT_MODE);
reg16(TMR_ENBL) = 0xf; /* enable all the timers --- why not? */
led_on();
enable_tmr_irq();
enableIRQ();
while(1) {
/* blink on */
reg32(GPIO_DATA0) = 0x00000400;
while((reg16(TMR0_SCTRL)>>15) == 0) { continue; }
reg16(TMR0_SCTRL) = 0; /*clear bit 15, and all the others --- should be ok, but clearly not "the right thing to do" */
/* blink off */
reg32(GPIO_DATA0) = 0x00000000;
while((reg16(TMR0_SCTRL)>>15) == 0) { continue; }
reg16(TMR0_SCTRL) = 0; /*clear bit 15, and all the others --- should be ok, but clearly not "the right thing to do" */
/* sit here and let the interrupts do the work */
};
}