diff options
| author | Bent Bisballe Nyeng <deva@aasimon.org> | 2013-11-18 19:53:22 +0100 |
|---|---|---|
| committer | Bent Bisballe Nyeng <deva@aasimon.org> | 2013-11-18 19:53:22 +0100 |
| commit | 1b6d3f9ee7fad554f23b05d7e4a09c3ec9635636 (patch) | |
| tree | 1e86e5e746de06738ee86d8186443b4c408ff9ca | |
| parent | 8843200ce12701862ab7c1a54bcba539214efad5 (diff) | |
Add IRQ blinky (timer interrupt based).
| -rw-r--r-- | firmware/src/p2m.c | 47 |
1 files changed, 45 insertions, 2 deletions
diff --git a/firmware/src/p2m.c b/firmware/src/p2m.c index 3f4f2f2..11fe393 100644 --- a/firmware/src/p2m.c +++ b/firmware/src/p2m.c @@ -6,7 +6,9 @@ #include <LPC17xx.h>
-#define SPI
+//#define SPI
+#define IRQ_BLINKY
+//#define BLINKY
#ifdef DMA
@@ -19,7 +21,7 @@ int main (void) // int i = 0;
while(1) {
- // fiprintf(stderr, "Play #%d: %d samples\n\r", i++, sizeof(samples) / sizeof(short));
+ //fiprintf(stderr, "Play #%d: %d samples\n\r", i++, sizeof(samples) / sizeof(short));
dac_play_samples(samples, sizeof(samples) / sizeof(short));
}
return 0;
@@ -30,6 +32,47 @@ volatile uint32_t temp; void _delay(uint32_t del);
+#ifdef IRQ_BLINKY
+
+volatile int resume = 0;
+
+void TIMER0_IRQHandler (void)
+{
+ LPC_TIM0->IR = 1; /* clear interrupt flag */
+ resume = 1 - resume;
+ //timer0_counter++;
+ return;
+}
+
+int main (void)
+{
+ LPC_SC->PCONP |= ( 1 << 15 ); // power up GPIO
+ LPC_GPIO1->FIODIR |= 1 << 29; // puts P1.29 into output mode.
+
+ int delayInMs = 1000;
+
+ // Enable timer interrupts
+ LPC_TIM0->MR0 = delayInMs * (9000000 / 1000-1); // interval
+ LPC_TIM0->MCR = 3; // Interrupt and Reset on MR0
+ NVIC_EnableIRQ(TIMER0_IRQn);
+ LPC_TIM0->TCR = 1;
+
+ while(1) {
+ LPC_GPIO1->FIOPIN |= 1 << 29; // make P1.29 high
+
+ while(resume == 0) __WFI();
+
+ LPC_GPIO1->FIOPIN &= ~( 1 << 29 ); // make P1.29 low
+
+ while(resume == 1) __WFI();
+ }
+
+ return 0;
+
+}
+
+#endif
+
#ifdef BLINKY
int main (void)
|