/*
 * adc-test.c
 *
 * Unit tests for the lambda project.
 *
 *  Created on: 15.05.2015
 *      Author: dode@luniks.net
 *
 */

#include "avrjunit.h"
#include "interrupts.h"
#include "adc.h"
#include "pins.h"

/* Module adc */

bool testSetupADC(void) {
	setupADC();

	// AVCC is set as AREF
	assertTrue(bit_is_set(ADMUX, REFS0));
	// digital inputs are disabled
	uint8_t adcPorts = (1 << ADC_TEMPI) | (1 << ADC_TEMPO) | (1 << ADC_LAMBDA);
	assertTrue((DIDR0 & adcPorts) == adcPorts);
	// ADC clock prescaler/8
	uint8_t prescalerBy8 = (1 << ADPS1) | (1 << ADPS0);
	assertTrue((ADCSRA & prescalerBy8) == prescalerBy8);
	// ADC enabled
	assertTrue(bit_is_set(ADCSRA, ADEN));

	return true;
}

bool testGetVoltage(void) {
	initInterrupts();
	setupADC();
	setupSleepMode();

	// enable pull-up resistor so the measured voltage
	// should be close to AREF
	PORTC |= (1 << PC1);

	uint16_t mV = getVoltage(PC1);

	return mV > 4900;
}

/* Test "class" */
const char adc_P[] PROGMEM = "adc";

/* Test names */
const char testSetupADC_P[] PROGMEM = "testSetupADC";
const char testGetVoltage_P[] PROGMEM = "testGetVoltage";

/* Tests */
TestCase const adcTests[] = {
		{adc_P, testSetupADC_P, testSetupADC},
		{adc_P, testGetVoltage_P, testGetVoltage}
};