__interrupt void Timer0_A0(void) {
switch (__even_in_range(TA0IV, 6)) {
case TA0IV_NONE: { // TA0CCR0
P1OUT &= ~(CONTROL); // relais on bis
if (i++ == 0) { // start reading
onewire_reset(&ow);
onewire_write_byte(&ow, 0xcc); // skip ROM command
onewire_write_byte(&ow, 0x44); // convert T command
onewire_line_high(&ow);
}
if (i >= 14) { // read values 16
onewire_reset(&ow);
onewire_write_byte(&ow, 0xcc); // skip ROM command
onewire_write_byte(&ow, 0xbe); // read scratchpad command
for (i = 0; i < 9; i++)
scratchpad[i] = onewire_read_byte(&ow);
temp = ((scratchpad[1] << 8) + scratchpad[0]) * 0.0625;
// temp control
if (temp < 32 & TA0CCR1 < 48000) { // increase pwm
//TA0CCR1 = TA0CCR1 +1000;
}
if (temp > 32 & TA0CCR1 > 1000) { // decrease pwm
//TA0CCR1 = TA0CCR1 -1000;
}
i = 0;
}
break;
}
case TA0IV_TACCR1: { // TA0CCR1
P1OUT |= CONTROL; // relais off
break;
}
case TA0IV_TACCR2: // TA0CCR2
{
break;
}
case 6:
break; // TA0CCR3
default:
break;
}
}
int main()
{
onewire_t ow;
int i;
uint8_t scratchpad[9];
uint8_t id[8];
WDTCTL = WDTPW + WDTHOLD; //Stop watchdog timer
BCSCTL1 = CALBC1_8MHZ;
DCOCTL = CALDCO_8MHZ;
uart_setup();
ow.port_out = &P1OUT;
ow.port_in = &P1IN;
ow.port_ren = &P1REN;
ow.port_dir = &P1DIR;
ow.pin = BIT7;
printf("start\n");
search(&ow, id, 0, 1);
printf("done\n");
onewire_reset(&ow);
onewire_write_byte(&ow, 0xcc); // skip ROM command
onewire_write_byte(&ow, 0x44); // convert T command
onewire_line_high(&ow);
// DELAY_MS(850); // at least 750 ms for the default 12-bit resolution
// while __delay_cycles(>100000) give the __delay_cycles max value error:
for (i = 0; i < 65; i++) __delay_cycles(100000);
onewire_reset(&ow);
onewire_write_byte(&ow, 0xcc); // skip ROM command
onewire_write_byte(&ow, 0xbe); // read scratchpad command
for (i = 0; i < 9; i++) scratchpad[i] = onewire_read_byte(&ow);
for (i = 0; i < 9; i++) printf("%02x", scratchpad[i]);
//meas = scratchpad[0]; // LSB
//meas |= ( (uint16_t)scratchpad[1] ) << 8; // MSB
int j=0;
uint16_t temp = 0;
for(j = 16; j > 0; i--){
temp >>= 1;
if (onewire_read_bit(&ow)) {
temp |= 0x8000;
}
}
if(temp<0x8000){
return(temp*0.0625);
}
else
{
temp=(~temp)+1;
return(temp*0.0625);
}
printf("%02x\n", temp);
printf("%02x\n", scratchpad[2]);
printf("%02x°C\n");
_BIS_SR(LPM0_bits + GIE);
return 0;
}
