35 lines
604 B
C
35 lines
604 B
C
#include <stdbool.h>
|
|
#include <stdint.h>
|
|
#include "ti.h"
|
|
|
|
extern volatile bool tick;
|
|
extern volatile uint32_t jiffies;
|
|
|
|
// Count microseconds
|
|
volatile uint32_t micros = 0;
|
|
|
|
// Interrupt called every 1024 µs
|
|
__attribute__((interrupt(TIMER0_A0_VECTOR)))
|
|
void
|
|
timer_a(void)
|
|
{
|
|
tick = true;
|
|
jiffies += 1;
|
|
}
|
|
|
|
|
|
|
|
void
|
|
init()
|
|
{
|
|
WDTCTL = WDTPW + WDTHOLD; // Disable Watchdog Timer
|
|
P1DIR = ~(_BV(NESOUT));
|
|
P1OUT = 0;
|
|
|
|
CCTL0 |= CCIE; // Trigger interrupt on A checkpoint
|
|
TACTL = TASSEL_2 + MC_1; // Set timer A to SMCLCK, up mode
|
|
TACCR0 = 0x4444; // Interrupt 60 times per second
|
|
|
|
__enable_interrupt();
|
|
}
|