thermocouple/firmware/slavechip/muxer.c

#include "muxer.h"
#include <avr/io.h>

void muxer_init(){
	DDRC |= (_BV(0)|_BV(1)|_BV(2)|_BV(3)); // conf as outputs
	PORTC |= _BV(3); // inhibit
}

void muxer_set(uint8_t channel){
	PORTC |= _BV(3); // engage inhibit
	PORTC &= ~(0x07); //mask
	PORTC |= channel & 0x07; //set 
	PORTC &= ~(_BV(3)); // disengage inhibit
	//TODO: delays, check everything, mask in register
}


void offset_measure_init(){
	DDRD |= 0x0f; // first 4 pins as output
	PORTD = 0x00; // turn everything off
}

void offset_measure_start(uint8_t channel){
	if(channel >3){
		return;
	}
	PORTD = (1<<channel);
}

void offset_measure_stop(){
	PORTD = 0;
}