uint8_t distance_sense()
{
/*Assumes to be called every 8ms. To reduce wear on infrared LED, measure
*only every DIST_TIMER_MAX calls. On all the other calls, return old
*value.
*/
static uint16_t dist_timer = 0;
static uint8_t current_distance = 0;
if(dist_timer == 0)
{
distance_supply_on();
_delay_us(400); //Rise time for infrared LED
//select channel 2 for ADC
clearbit(ADMUX, MUX0);
setbit(ADMUX, MUX1);
clearbit(ADMUX, MUX2);
clearbit(ADMUX, MUX3);
current_distance = 255-adc_conversion();
distance_supply_off();
dist_timer = DIST_TIMER_MAX;
}
dist_timer--;
return(current_distance);
}
uint8_t current_sense()
{
//select channel 1 for ADC
setbit(ADMUX, MUX0);
clearbit(ADMUX, MUX1);
clearbit(ADMUX, MUX2);
clearbit(ADMUX, MUX3);
return(adc_conversion());
}
int main(){
lcd_init();
adc_port_config();
adc_init();
while(1){
//11 is the channel number
lcd_print(1, 6, adc_conversion(11), 3);
_delay_ms(500);
}
}
