/*
 * ads1210.cpp
 *
 *  Created on: Nov 2, 2014
 *      Author: wn
 */

// #include <Arduino.h>
#include <SPI.h>
#include <Streaming.h>
#include "ads1210.h"

ADS1210::ADS1210() {
}

void ADS1210::enableCS() const {
	digitalWrite(m_csPin, LOW);
}
void ADS1210::disableCS() const {
	digitalWrite(m_csPin, HIGH);
}

void ADS1210::writeCMR () const {
	uint8_t instr = INSR_MB1 | INSR_MB0 | ADDR_CMR3;
	enableCS();
	SPI.transfer(instr);
	SPI.transfer(m_cmrShadow[3]);
	SPI.transfer(m_cmrShadow[2]);
	SPI.transfer(m_cmrShadow[1]);
	SPI.transfer(m_cmrShadow[0]);
	disableCS();
}

void ADS1210::readCMR () {
	uint8_t instr = INSR_MB1 | INSR_MB0 | ADDR_CMR3 | INSR_RW;
	enableCS();
	SPI.transfer(instr);
	m_cmrShadow[3] = SPI.transfer(0);
	m_cmrShadow[2] = SPI.transfer(0);
	m_cmrShadow[1] = SPI.transfer(0);
	m_cmrShadow[0] = SPI.transfer(0);
	disableCS();
}



void ADS1210::begin(uint8_t csPin) {
  m_csPin = csPin;
  
	// initialization of SPI
	pinMode(m_csPin, OUTPUT);
	digitalWrite(m_csPin, HIGH);
	SPI.begin();
	SPI.setBitOrder(MSBFIRST);
	SPI.setClockDivider(SPI_CLOCK_DIV2);
	SPI.setDataMode(SPI_MODE0);

	// initialization of the ADS1210
  readCMR();
  
  Serial << "CMR3: " << _HEX(m_cmrShadow[3]) << ", CMR2: " << _HEX(m_cmrShadow[2]) << ", CMR1: " << _HEX(m_cmrShadow[1]) << ", CMR0: " << _HEX(m_cmrShadow[0]) << endl;
}