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sht4x support,, typo fix (#2843)

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Totoo 2025-10-28 03:14:11 +01:00 • committed by GitHub
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5 changed files with 126 additions and 2 deletions
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firmware/common/i2cdev_sht4x.cpp Normal file
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/*
* Copyright (C) 2024 HTotoo.
*
* This file is part of PortaPack.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#include "i2cdev_sht4x.hpp"
namespace i2cdev {
bool I2cDev_SHT4x::init(uint8_t addr_) {
if (addr_ != I2CDEV_SHT4X_ADDR_1 && addr_ != I2CDEV_SHT4X_ADDR_2) return false;
addr = addr_; // store the addr
model = I2C_DEVMDL::I2CDEVMDL_SHT4X; // set the device model!!!!!!!!!!!!!!!!!!
query_interval = 10; // set update interval in sec
chThdSleepMilliseconds(50);
uint8_t tmp[1]; // command buffer
uint8_t rx[6]; // response buffer
tmp[0] = SHT4X_SERIAL_NUMBER_CMD_ID;
if (!i2c_write(nullptr, 0, tmp, 1)) return false; // get serial number
chThdSleepMilliseconds(10);
if (!i2c_read(nullptr, 0, rx, 6)) return false; // read serial number
return true;
}
void I2cDev_SHT4x::update() {
float temp = 0;
float hum = 0;
uint8_t cmd[1];
cmd[0] = SHT4X_MEASURE_MEDIUM_PRECISION_TICKS_CMD_ID;
uint8_t res[6];
if (!i2c_write(nullptr, 0, cmd, 1)) return;
chThdSleepMilliseconds(5); // wait for measurement, 10 for high precision, 5 for medium, 2 for low
if (!i2c_read(nullptr, 0, res, 6)) return;
uint16_t temptick = (uint16_t)res[0] << 8 | (uint16_t)res[1];
uint16_t humtick = (uint16_t)res[3] << 8 | (uint16_t)res[4];
temp = -45 + (((float)temptick * 175.0) / 65535.0);
hum = -6 + 125.0 * (float)humtick / 65535.0;
if (hum < 0) hum = 0;
if (hum > 100) hum = 100;
EnvironmentDataMessage msg{temp, hum}; // create the system message
EventDispatcher::send_message(msg); // and send it
}
} // namespace i2cdev