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3d8b732158
Removed some unneeded calls in update function. Changed call in micsv89.js sample file to use update instead of start. Tested with UPM. 4.0. The micsv89 is sensitive to other devices pulling the I2c bus up, so it is not likely to work on the Arduino breakout. I2c 1 on mini breakout works fine. —Signed-off-by Marc Graham <marc@m2ag.net> Signed-off-by: Abhishek Malik <abhishek.malik@intel.com>
80 lines
2.5 KiB
C++
80 lines
2.5 KiB
C++
/*
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* Author: Marc Graham <marc@m2ag.net>
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* Copyright (c) 2015 Intel Corporation.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "micsv89.h"
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using namespace upm;
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MICSV89::MICSV89 (int bus, uint8_t address) {
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m_name = "micsv89";
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m_valid = false;
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m_address = address;
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i2c = new mraa::I2c(bus);
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if(i2c->address(m_address) != mraa::SUCCESS){
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throw std::invalid_argument(std::string(__FUNCTION__) + ": I2c.address() failed");
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return;
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}
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if(i2c->frequency(mraa::I2C_STD) != mraa::SUCCESS){
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throw std::invalid_argument(std::string(__FUNCTION__) + ": I2c.frequency(I2C_STD) failed");
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return;
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}
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tx_buf[0] = 0x09;
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tx_buf[1] = 0x00;
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tx_buf[2] = 0x00;
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}
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void MICSV89::update() {
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m_valid = false;
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if(i2c->write(tx_buf, 3) != mraa::SUCCESS){
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throw std::invalid_argument(std::string(__FUNCTION__) + ": I2c.write() failed");
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return;
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}
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sleep(1); //Give the device time to make the measurement.
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if(i2c->read(rx_buf, 6) != 6){
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throw std::invalid_argument(std::string(__FUNCTION__) + ": I2c.read() failed");
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return;
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}
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m_valid = true;
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}
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float MICSV89::co2equ() {
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return ((rx_buf[0] - 13) * (1600/229) + 400);
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}
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int MICSV89::vocshort() {
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return rx_buf[1];
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}
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float MICSV89::tvoc() {
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return rx_buf[2] * (1000/229);
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}
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float MICSV89::resistor() {
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return 10 * (rx_buf[3] + (256 * rx_buf[4]) + (65536 * rx_buf[5]));
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}
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MICSV89::~MICSV89() {
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delete i2c;
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}
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