mirror of
https://github.com/fairwaves/UHD-Fairwaves.git
synced 2025-10-23 16:13:50 +00:00
121 lines
3.0 KiB
C++
121 lines
3.0 KiB
C++
//
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// Copyright 2014 Fairwaves LLC
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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//
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#include "tmp102_ctrl.hpp"
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#include <boost/assign/list_of.hpp>
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#include <iostream>
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using namespace uhd;
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tmp102_ctrl::tmp102_ctrl()
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: _addr(TMP102_NONE)
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, _config(0)
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{
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}
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bool tmp102_ctrl::check(const uhd::i2c_iface::sptr& iface, tmp102_addr addr)
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{
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byte_vector_t cmd = boost::assign::list_of(REG_CONF);
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iface->write_i2c(addr, cmd);
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byte_vector_t vec = iface->read_i2c(addr, 2);
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uint16_t res = (((uint16_t)vec.at(0)) << 8) | vec.at(1);
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// Resolution bits are always set
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if (((res & CONF_R_MASK) != CONF_R_MASK) || ((res & 0xF) != 0)) {
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return false;
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}
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return true;
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}
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void tmp102_ctrl::init(i2c_iface::sptr iface, tmp102_addr addr)
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{
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_iface = iface;
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_addr = addr;
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_config = get_reg(REG_CONF);
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}
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double tmp102_ctrl::get_temp()
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{
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if (!_iface)
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return nan("");
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if (_config & CONF_SD) {
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// Start conversion in shutdown mode
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set_reg(REG_CONF, _config | CONF_OS);
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// Wait for conversion ready
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unsigned i;
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for (i = 0; i < TMP102_POLL_RDY_WATCHDOG; i++) {
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if (get_reg(REG_CONF) & CONF_OS)
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break;
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}
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if (i == TMP102_POLL_RDY_WATCHDOG)
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return nan("");
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}
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int16_t tmp = (int16_t)get_reg(REG_TEMP);
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if (tmp & 0x001) {
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tmp >>= 3;
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} else {
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tmp >>= 4;
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}
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return 0.0625 * (double)tmp;
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}
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void tmp102_ctrl::set_update_rate(conversion_rate rate)
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{
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_config &= ~CONF_CR_MASK;
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_config |= (rate << CONF_CR_OFFS) & CONF_CR_MASK;
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set_reg(REG_CONF, _config);
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}
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void tmp102_ctrl::set_ex_mode(bool ex_mode)
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{
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if (ex_mode)
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_config |= CONF_EM;
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else
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_config &= ~CONF_EM;
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set_reg(REG_CONF, _config);
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}
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void tmp102_ctrl::set_shutdown_mode(bool shutdown_mode)
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{
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if (shutdown_mode)
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_config |= CONF_SD;
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else
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_config &= ~CONF_SD;
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set_reg(REG_CONF, _config);
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}
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uint16_t tmp102_ctrl::get_reg(tmp102_regs reg)
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{
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byte_vector_t cmd = boost::assign::list_of(reg);
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_iface->write_i2c(_addr, cmd);
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byte_vector_t vec = _iface->read_i2c(_addr, 2);
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uint16_t res = ((uint16_t)vec.at(0) << 8) | vec.at(1);
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return res;
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}
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void tmp102_ctrl::set_reg(tmp102_regs reg, uint16_t value)
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{
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byte_vector_t cmd = boost::assign::list_of((uint8_t)reg)((uint8_t)(value >> 8))((uint8_t)(value & 0xFF));
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_iface->write_i2c(_addr, cmd);
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}
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