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start/stop bit

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This commit is contained in:
Wolfgang Hottgenroth
2016-09-28 10:13:08 +02:00
parent c4ef53ac6b
commit cd937ea4d1
2 changed files with 24 additions and 22 deletions
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28
src/inverter.c
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@ -71,13 +71,32 @@ ISR(TIMER0_A1, TA0_ISR_Comp) {
__enable_interrupt();
}
ISR(PORT1, PORT1_ISR) {
uint16_t p1Ifg = P1IFG;
if (p1Ifg & BIT3) {
// start
pulseWidthIdx = 0;
TA0CTL = MC_1 | ID_0 | TASSEL_0 | TACLR;
} else if (p1Ifg & BIT4) {
// stop
TA0CTL = MC_0;
}
}
void inverterInit() {
// start, stop
// BIT3: start, BIT4: stop
P1OUT &= (BIT3 | BIT4);
P1DIR &= (BIT3 | BIT4);
P1IES = BIT3;
P1IE |= BIT3 | BIT4;
// bridge direction
P1OUT &= ~BIT2;
P1OUT |= BIT1;
P1DIR |= BIT1 | BIT2;
// bridge enable (PWM)
P2OUT &= ~BIT1;
P2DIR |= BIT1;
@ -91,11 +110,7 @@ void inverterInit() {
P1DIR &= ~BIT0;
P1SEL |= BIT0;
// SMCLK out
P1DIR |= BIT4;
P1SEL |= BIT4;
TA0CTL = MC_1 | ID_0 | TASSEL_0 | TACLR;
TA0CTL = MC_0;
TA0CCTL0 = CCIE | OUTMOD_4;
TA0CCTL1 = CCIE;
TA0CCTL2 = CCIE;
@ -104,6 +119,7 @@ void inverterInit() {
TA0CCR2 = 1;
}
void inverterSetFrequency(uint16_t f) {
float ff = (float)f;
float slotLength = 2 / (ff * 400e-9 * NUM_OF_SINE_VALUES);