49 lines
873 B
C
49 lines
873 B
C
#include <msp430.h>
|
|
#include <stdint.h>
|
|
|
|
const uint8_t digits[] = {
|
|
0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7d, 0x07, 0x7f, 0x6f,
|
|
0x77, 0x7c, 0x39, 0x5e, 0x79, 0x71
|
|
};
|
|
|
|
// seconds/60
|
|
volatile uint16_t jiffies = 0;
|
|
unsigned int i = 0;
|
|
|
|
int
|
|
main(void)
|
|
{
|
|
WDTCTL = WDTPW + WDTHOLD; // Disable Watchdog Timer
|
|
P1DIR |= BIT0 + BIT6; // P1.0 output
|
|
P1OUT = (P1OUT & ~BIT6) | BIT0;
|
|
|
|
#if 1
|
|
CCTL0 |= CCIE; // Trigger interrup on Timer A checkpoint
|
|
TACTL = TASSEL_2 + MC_1; // Set timer A to SMCLCK, up mode
|
|
TACCR0 = 0x4444;
|
|
|
|
__enable_interrupt();
|
|
#endif
|
|
|
|
for (;;) {
|
|
i = (i + 1) % 1000;
|
|
if ((jiffies / 60) % 2) {
|
|
P1OUT &= ~BIT0;
|
|
} else {
|
|
P1OUT |= BIT0;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Timer A0 interrupt service routine
|
|
__attribute__((interrupt(TIMER0_A0_VECTOR)))
|
|
void timer_a(void)
|
|
{
|
|
jiffies += 1;
|
|
if ((jiffies / 60) % 2) {
|
|
P1OUT |= BIT6;
|
|
} else {
|
|
P1OUT &= ~BIT6;
|
|
}
|
|
}
|