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