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drivers/sht2x: release I2C bus during sleep

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This commit is contained in:
Gunar Schorcht 2022-12-13 00:58:03 +01:00
parent 43819464f7
commit ff3cbd13ea
1 changed files with 13 additions and 5 deletions
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18
drivers/sht2x/sht2x.c
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@ -1,7 +1,8 @@
/*
* Copyright (C) 2016,2017,2018 Kees Bakker, SODAQ
* Copyright (C) 2017 George Psimenos
* Copyright (C) 2018 Steffen Robertz
* 2017 George Psimenos
* 2018 Steffen Robertz
* 2022 Gunar Schorcht
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
@ -13,8 +14,8 @@
* @{
*
* @file
* @brief Device driver implementation for the SHT2x temperature and
* humidity sensor.
* @brief Device driver implementation for the SHT2x humidity and
* temperature humidity sensor.
*
* @author Kees Bakker <kees@sodaq.com>
* @author George Psimenos <gp7g14@soton.ac.uk>
@ -358,17 +359,24 @@ static int read_sensor_poll(const sht2x_t* dev, cmd_t command, uint16_t *val)
uint8_t buffer[3];
int i2c_result;
/* Acquire exclusive access */
/* acquire the bus for exclusive access */
i2c_acquire(_BUS);
DEBUG("[SHT2x] write command: addr=%02x cmd=%02x\n", _ADDR, (uint8_t)command);
(void)i2c_write_byte(_BUS, _ADDR, (uint8_t)command, 0);
/* release the bus for measurement duration */
i2c_release(_BUS);
/* sleep for measurement duration */
if (command == temp_no_hold_cmd) {
sleep_during_temp_measurement(dev->params.resolution);
} else {
sleep_during_hum_measurement(dev->params.resolution);
}
/* reacquire the bus for exclusive access */
i2c_acquire(_BUS);
uint8_t ix = 0;
for (; ix < MAX_RETRIES; ix++) {
i2c_result = i2c_read_bytes(_BUS, _ADDR, buffer, sizeof(buffer), 0);