/*

 * sensors.c

 *

 * Created: 11/19/2012 9:25:01 PM

 *  Author: kripperger

 */ 

#include <inttypes.h>

#include <avr/io.h>

#include <avr/interrupt.h>

#include "../config.h"

#include <util/delay.h>

#include "sensors.h"

#include "spi.h"

#include "i2c.h"

int16_t	spiTemp;	// Thermocouple Temperature (from spi)

int8_t	boardTemp;	// Board Temperature (from i2c)

uint16_t pressure;	// Pressure (from i2c)

//int humid;		// Humidity (from i2c)

uint8_t light;		// Lux reading (from i2c)

void sensors_readSpiTemp()

{

	// Select TEMP wait 100 microseconds then read four bytes

	SELECT_TEMP;

	_delay_us(100);

	uint8_t one = send_spi(0xFF);

	_delay_us(100);

	uint8_t two = send_spi(0xFF);

	_delay_us(100);

	uint8_t three = send_spi(0xFF);

	_delay_us(100);

	uint8_t four = send_spi(0xFF);

	DESELECT_TEMP;

	int16_t temperature = ((one<<4)|(two>>4));	// Shift and place into larger int. (Cuts off Decimal)

	temperature = (temperature & (0x0800)) ? (temperature & 0xF000) : temperature;	// Sign extend

	//int16_t temperature = ((one<<6)|(two>>2));	// Shift and place into larger int. (Includes Decimal)

	//temperature = (temperature & (0x2000)) ? (temperature & 0xC000) : temperature;	// Sign extend

	temperature = (two & 0x01) ? 0x00DE : temperature;	// Error Condition. If error is detected output is set to 222 degrees (0x00DE)

	// Note: Temperature still needs to be scaled in order to be accurate (eg. boil water). Do this before implementing.

	spiTemp = temperature;

}

void sensors_readBoardTemp()

{

	boardTemp = i2c_read(BOARDTEMP_ADDR, 0x00);		// Read only the first byte of data (we don't need the resolution here)

	boardTemp = ((boardTemp*18)/10) + (32);			// Converting Celsius to Fahrenheit

	boardTemp = boardTemp - 3;						// Linear offset

}

void sensors_readPressure()

{//needs editing

	pressure = i2c_read(PRESSURE_ADDR, 0xF6);

	pressure = pressure << 8;

	pressure = pressure | i2c_read(PRESSURE_ADDR, 0xF7);

}

void sensors_readHumid()

{

	//humid = i2c_read(HUMID_ADDR, 0xXX);

}

void sensors_readLight()

{

	light = i2c_read(LIGHT_ADDR, 0x03);

	// light = light << 4;

	// light = light | (0x0F & i2c_read(LIGHT_ADDR, 0x04));  //  This can be used to read in the 4 LSBs from the second register

	// FOR FIRST BYTE:

	// Lux = 2^(exponent)*mantissa*0.72

	// exponent = 8xE3 + 4xE2 + 2xE1 + E0

	// mantissa = 8xM7 + 4xM6 + 2xM5 + M4

	// FOR BOTH BYTES:

	// Lux = 2^(exponent)*mantissa*0.045

	// exponent = 8xE3 + 4xE2 + 2xE1 + E0

	// mantissa = 128xM7 + 64xM6 + 32xM5 + 16xM4 + 8xM3 + 4xM2 + 2xM1 + M0

}

int16_t sensors_getSpiTemp(void)	// Gets spi temperature from variable

{

	return spiTemp;

}

int8_t sensors_getBoardTemp(void)	// Gets board temperature from variable

{

	return boardTemp;

}

uint16_t sensors_getPressure(void)

{

	return pressure;

}

//int sensors_getHumid(void)

//{

	//return humid;

//}

uint8_t sensors_getLight(void)

{

	return light;

}

/*

 * modules.c

 *

 * Created: 11/9/2012 11:44:22 AM

 *  Author: kripperger

 */ 

 #include <inttypes.h>

 #include <avr/io.h>

 #include <avr/interrupt.h>

 #include "config.h"

 #include <util/delay.h>

 #include "modules.h"

 #include "lib/spi.h"

 void modules_setup(uint8_t id)

 {

	switch(id)

	{

		case 0:

			modules_generic_setup();

			break;

		case 1:

			modules_sensors_setup();

			break;

		case 2:

			modules_geiger_setup();

			break;

		case 3:

			modules_cameras_setup();

			break;

		default:

			modules_generic_setup();

			break;

	}

 }

 void modules_run(uint8_t id)

 {

	switch(id)

	{

		case 0:

			modules_generic();

			break;

		case 1:

			modules_sensors();

			break;

		case 2:

			modules_geiger();

			break;

		case 3:

			modules_cameras();

			break;

		default:

			modules_generic();

			break;

	}

 }

 void modules_generic_setup()

 {

 }

 void modules_sensors_setup()

 {

	 DESELECT_TEMP;

	 setup_spi();

 }

 void modules_geiger_setup()

 {

	// Pin setup

	DDRA &= ~(1 << DDA0);	// PA0 is an input

	// Setup for interrupt input on PA0 (PCINT0)

	PCMSK0 |= (1 << PCINT0);	// Enable interrupt for PA0

	PCICR |= (1 << PCIE0);		// Enable ioc section PCIF0

	// Setup for interrupt from Timer2

	ASSR &= ~(1 << EXCLK);	// Disable external clock input (enabling crystal use)

	ASSR |= (1 << AS2);		// Enable timer2 async mode with an external crystal	

	_delay_ms(250);			// Let external 32KHz crystal stabilize

	TCCR2B = 0x05;			// Set the prescaler to 128: 32.768kHz / 128 = 1Hz overflow

	TIFR2 = 0x01;			// Reset timer2 overflow interrupt flag

	TIMSK2 = 0x01;			// Enable interrupt on overflow

	sei();					// Enable all interrupts

 }

 void modules_cameras_setup()

 {

 }

 void modules_generic()

 {

	// Gathers data and performs functions for generic daughter board

 }

 void modules_sensors()

 {

	// Gathers data and performs functions for sensor daughter board

	sensors_readBoardTemp();		//Data Read

	sensors_readSpiTemp();			//Data Read

 }

 void modules_geiger()

 {

	// No data gatering function needed for geiger daughter board

		// This is taken care of in interrupt (See geiger.c)

 }

 void modules_cameras()

 {

	// Gathers data and performs functions for cameras daughter board

 }