139 lines
2.7 KiB
C++
139 lines
2.7 KiB
C++
/*
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* ads1210.cpp
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*
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* Created on: Nov 2, 2014
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* Author: wn
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*/
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// #include <Arduino.h>
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#include <SPI.h>
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#include "Streaming.h"
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#include "ads1210.h"
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#include "fatal.h"
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void ADS1210::enableCS() const {
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digitalWrite(m_csPin, LOW);
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}
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void ADS1210::disableCS() const {
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digitalWrite(m_csPin, HIGH);
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}
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void ADS1210::waitForDRdy() const {
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uint32_t timeOut = 100000;
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while ((0 != digitalRead(m_drdyPin)) && timeOut) {
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timeOut--;
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}
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if (0 == timeOut) {
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fatal(1);
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}
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}
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void ADS1210::writeRegister(const uint8_t regAddr, const uint8_t value) const {
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//waitForDRdy();
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enableCS();
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SPI.transfer(regAddr);
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SPI.transfer(value);
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disableCS();
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}
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uint8_t ADS1210::readRegister(const uint8_t regAddr) const {
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uint8_t res;
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//waitForDRdy();
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enableCS();
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SPI.transfer(regAddr | INSR_RW);
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res = SPI.transfer(0);
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disableCS();
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return res;
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}
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void ADS1210::exec() {
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if (0 == digitalRead(m_drdyPin)) {
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union {
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uint8_t in[4];
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uint32_t out;
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} res;
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enableCS();
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SPI.transfer(ADDR_DOR2 | INSR_MB1 | INSR_RW);
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res.in[2] = SPI.transfer(0);
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res.in[1] = SPI.transfer(0);
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res.in[0] = SPI.transfer(0);
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res.in[3] = 0;
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disableCS();
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Serial << "DOR4x8: " << _HEX(res.in[3]) << " " << _HEX(res.in[2]) << " " << _HEX(res.in[1]) << " " << _HEX(res.in[0]) << endl;
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Serial << "DOR1x32: " << _HEX(res.out) << endl;
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value = res.out;
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}
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}
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void ADS1210::disableRefO() const {
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uint8_t cmr = readRegister(ADDR_CMR3);
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cmr &= ~CMR_REFO;
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writeRegister(ADDR_CMR3, cmr);
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}
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void ADS1210::enableRefO() const {
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uint8_t cmr = readRegister(ADDR_CMR3);
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cmr |= CMR_REFO;
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writeRegister(ADDR_CMR3, cmr);
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}
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void ADS1210::setMode(uint8_t mode) const {
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uint8_t cmr = readRegister(ADDR_CMR2);
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cmr &= ~CMR_MD_Mask;
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cmr |= mode;
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writeRegister(ADDR_CMR2, cmr);
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}
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void ADS1210::setGain(uint8_t gain) const {
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uint8_t cmr = readRegister(ADDR_CMR2);
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cmr &= ~CMR_Gain_Mask;
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cmr |= gain;
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writeRegister(ADDR_CMR2, cmr);
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}
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void ADS1210::begin(uint8_t csPin, uint8_t drdyPin) {
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static bool onlyOnce = false;
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m_csPin = csPin;
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m_drdyPin = drdyPin;
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// initialization of SPI
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Serial << "Start SPI initialization ... ";
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pinMode(m_csPin, OUTPUT);
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digitalWrite(m_csPin, HIGH);
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SPI.begin();
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SPI.setBitOrder(MSBFIRST);
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SPI.setClockDivider(SPI_CLOCK_DIV16);
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SPI.setDataMode(SPI_MODE1);
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Serial << "done." << endl;
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// initialization of ADS1210
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Serial << "Start ADS1210 initialization ... ";
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pinMode(m_drdyPin, INPUT);
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writeRegister(ADDR_CMR3, CMR_SDL | CMR_UB | CMR_REFO);
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Serial << "done." << endl;
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Serial << "Set gain ... ";
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setGain(CMR_Gain_2);
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Serial << "done." << endl;
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Serial << "SelfCalibration ... ";
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setMode(CMR_MD_SelfCalibration);
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waitForDRdy();
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Serial << "done." << endl;
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}
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