mirror of
https://github.com/eclipse/upm.git
synced 2025-03-16 05:27:28 +03:00
179 lines
4.1 KiB
C++
179 lines
4.1 KiB
C++
/*
|
|
* Author: Jon Trulson <jtrulson@ics.com>
|
|
* Copyright (c) 2016 Intel Corporation.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining
|
|
* a copy of this software and associated documentation files (the
|
|
* "Software"), to deal in the Software without restriction, including
|
|
* without limitation the rights to use, copy, modify, merge, publish,
|
|
* distribute, sublicense, and/or sell copies of the Software, and to
|
|
* permit persons to whom the Software is furnished to do so, subject to
|
|
* the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be
|
|
* included in all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
|
|
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
|
|
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
|
|
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
*/
|
|
|
|
#include <unistd.h>
|
|
#include <stdlib.h>
|
|
#include <iostream>
|
|
#include <stdexcept>
|
|
#include <string>
|
|
|
|
#include "rhusb.hpp"
|
|
|
|
using namespace upm;
|
|
using namespace std;
|
|
|
|
static const int maxBuffer = 1024;
|
|
// baud rate is always 9600
|
|
static const int baudRate = 9600;
|
|
|
|
// conversion from celsius to fahrenheit
|
|
|
|
static float c2f(float c)
|
|
{
|
|
return (c * (9.0 / 5.0) + 32.0);
|
|
}
|
|
|
|
RHUSB::RHUSB(std::string device) :
|
|
m_uart(device)
|
|
{
|
|
m_uart.setBaudRate(baudRate);
|
|
|
|
m_temperature = 0.0;
|
|
m_humidity = 0.0;
|
|
}
|
|
|
|
RHUSB::~RHUSB()
|
|
{
|
|
}
|
|
|
|
void RHUSB::update()
|
|
{
|
|
char *endptr;
|
|
float value;
|
|
|
|
// first get the temp in C
|
|
string resp = sendCommand("C");
|
|
|
|
// convert
|
|
value = strtof(resp.c_str(), &endptr);
|
|
|
|
// check for conversion failure
|
|
if (value == 0.0 && resp.c_str() == endptr)
|
|
{
|
|
throw std::runtime_error(std::string(__FUNCTION__) +
|
|
": strtof() temperature conversion failed");
|
|
}
|
|
m_temperature = value;
|
|
|
|
// now humidity
|
|
resp = sendCommand("H");
|
|
|
|
// convert
|
|
value = strtof(resp.c_str(), &endptr);
|
|
|
|
// check for conversion failure
|
|
if (value == 0.0 && resp.c_str() == endptr)
|
|
{
|
|
throw std::runtime_error(std::string(__FUNCTION__) +
|
|
": strtof() humidity conversion failed");
|
|
}
|
|
m_humidity = value;
|
|
}
|
|
|
|
float RHUSB::getTemperature(bool fahrenheit)
|
|
{
|
|
if (fahrenheit)
|
|
return c2f(m_temperature);
|
|
else
|
|
return m_temperature;
|
|
}
|
|
|
|
float RHUSB::getTemperature()
|
|
{
|
|
return getTemperature(false);
|
|
}
|
|
|
|
float RHUSB::getHumidity()
|
|
{
|
|
return m_humidity;
|
|
}
|
|
|
|
bool RHUSB::dataAvailable(unsigned int millis)
|
|
{
|
|
return m_uart.dataAvailable(millis);
|
|
}
|
|
|
|
string RHUSB::readStr(int len)
|
|
{
|
|
return m_uart.readStr(len);
|
|
}
|
|
|
|
int RHUSB::writeStr(string data)
|
|
{
|
|
m_uart.flush();
|
|
return m_uart.writeStr(data);
|
|
}
|
|
|
|
string RHUSB::sendCommand(string cmd)
|
|
{
|
|
// make sure we got a command
|
|
if (cmd.empty())
|
|
{
|
|
throw std::invalid_argument(std::string(__FUNCTION__) +
|
|
": cmd is empty!");
|
|
}
|
|
|
|
// Terminate the command with a carriage return
|
|
writeStr(cmd + "\r");
|
|
|
|
string resp;
|
|
// I see random timeouts with wait values below 250ms
|
|
while (dataAvailable(250) && (resp.size() < maxBuffer) )
|
|
{
|
|
resp += readStr(maxBuffer);
|
|
}
|
|
|
|
if (resp.empty())
|
|
{
|
|
throw std::runtime_error(std::string(__FUNCTION__) +
|
|
": " + cmd + " response timed out");
|
|
}
|
|
|
|
// check that the last character is the prompt
|
|
if (resp.at(resp.size() - 1) != '>')
|
|
{
|
|
throw std::runtime_error(std::string(__FUNCTION__) +
|
|
": " + cmd + " response corrupt");
|
|
}
|
|
|
|
// delete the last 3 characters, which should be '\r\n>'
|
|
resp.erase(resp.size() - 3, 3);
|
|
|
|
return resp;
|
|
}
|
|
|
|
string RHUSB::getFirmwareID()
|
|
{
|
|
string resp = sendCommand("ENQ");
|
|
|
|
// For readability, replace the intermediate \r\n with a space if found.
|
|
|
|
size_t pos = resp.find("\r\n");
|
|
|
|
if (pos != string::npos)
|
|
resp.replace(pos, 2, " ");
|
|
|
|
return resp;
|
|
}
|