I am trying to configure the STS4x temperature sensor by Sensirion on I2C on a nRF5340DK, I have setup my the coding exactly how sensirion suggested except few changes such as I2C address. Here is the github link : https://github.com/Sensirion/embedded-i2c-sts4x.git
In the github it is suggested that to only edit the sensirion_i2c_hal.c file and sensirion already gave an example of it in the github. However, i have changed the header files that suits current zephyr. Below is the sensirion_i2c_hal.c , in here i used I2C_1 instead of I2C_0 already given.
#include <zephyr/drivers/i2c.h>
#include <zephyr/kernel.h> // For k_usleep and other kernel functions
#include <zephyr/device.h>
#include <zephyr/devicetree.h>
#include "sensirion_common.h"
#include "sensirion_config.h"
#include "sensirion_i2c_hal.h"
/* I2C device. */
static const struct device *i2c_dev;
/**
* Select the current i2c bus by index.
* All following i2c operations will be directed at that bus.
*
* @param bus_idx Bus index to select
* @returns 0 on success, an error code otherwise
*/
int16_t sensirion_i2c_hal_select_bus(uint8_t bus_idx) {
char bus_name[6] = "I2C_1";
if (bus_idx > 9) {
/* Invalid bus index */
return -1;
}
bus_name[4] = bus_idx + '0';
i2c_dev = device_get_binding(bus_name);
if (i2c_dev == NULL) {
/* No valid device found */
return -1;
}
return 0;
}
/**
* Initialize all hard- and software components that are needed for the I2C
* communication.
*/
void sensirion_i2c_hal_init(void) {
/* Device (specified by sps30_i2c_dev) is already initialized by the Zephyr
* boot-up process. Nothing to be done here. */
}
/**
* Release all resources initialized by sensirion_i2c_hal_init().
*/
void sensirion_i2c_hal_free(void) {
i2c_dev = NULL;
}
/**
* Execute one read transaction on the I2C bus, reading a given number of bytes.
* If the device does not acknowledge the read command, an error shall be
* returned.
*
* @param address 7-bit I2C address to read from
* @param data pointer to the buffer where the data is to be stored
* @param count number of bytes to read from I2C and store in the buffer
* @returns 0 on success, error code otherwise
*/
int8_t sensirion_i2c_hal_read(uint8_t address, uint8_t* data, uint16_t count) {
return i2c_read(i2c_dev, data, count, address);
}
/**
* Execute one write transaction on the I2C bus, sending a given number of
* bytes. The bytes in the supplied buffer must be sent to the given address. If
* the slave device does not acknowledge any of the bytes, an error shall be
* returned.
*
* @param address 7-bit I2C address to write to
* @param data pointer to the buffer containing the data to write
* @param count number of bytes to read from the buffer and send over I2C
* @returns 0 on success, error code otherwise
*/
int8_t sensirion_i2c_hal_write(uint8_t address, const uint8_t* data,
uint16_t count) {
return i2c_write(i2c_dev, data, count, address);
}
/**
* Sleep for a given number of microseconds. The function should delay the
* execution for at least the given time, but may also sleep longer.
*
* Despite the unit, a <10 millisecond precision is sufficient.
*
* @param useconds the sleep time in microseconds
*/
void sensirion_i2c_hal_sleep_usec(uint32_t useconds) {
int32_t remaining = useconds;
while (remaining > 0) {
remaining = k_usleep(remaining);
}
}
Here is my overlay file
&pinctrl {
i2c1_default_alt: i2c1_default_alt {
group2 {
psels = <NRF_PSEL(TWIM_SDA, 1, 02)>, <NRF_PSEL(TWIM_SCL, 1, 03)>;
bias-pull-up;
};
};
i2c1_default_sleep: i2c1_default_sleep {
group3 {
psels = <NRF_PSEL(TWIM_SDA, 1, 02)>, <NRF_PSEL(TWIM_SCL, 1, 03)>;
low-power-enable;
};
};
};
&i2c1 {
status = "okay";
compatible = "nordic,nrf-twim";
pinctrl-0 = <&i2c1_default_alt>;
pinctrl-1 = <&i2c1_default_sleep>;
pinctrl-names = "default", "sleep";
clock-frequency = < I2C_BITRATE_STANDARD >;
};
// sts4x: sts4x@44 {
// compatible = "i2c-device";
// reg = <0x44>;
// label = "STS4X";
// status = "okay";
// };
my prj.conf file
CONFIG_STDOUT_CONSOLE=y CONFIG_I2C=y CONFIG_SENSOR=y CONFIG_CBPRINTF_FP_SUPPORT=y # I2C CONFIG_NRFX_TWIM1=y # Rebooot CONFIG_REBOOT=n CONFIG_RESET_ON_FATAL_ERROR=n
And main file
#include <stdio.h> // printf
#include "sensirion_common.h"
#include "sensirion_i2c_hal.h"
#include "sts4x_i2c.h"
/*
* TO USE CONSOLE OUTPUT (PRINTF) YOU MAY NEED TO ADAPT THE INCLUDE ABOVE OR
* DEFINE IT ACCORDING TO YOUR PLATFORM:
* #define printf(...)
*/
int main(void) {
int16_t error = 0;
/**
* select the proper i2c address for your sensor (defaults to 0x46)
*
* STS40-CD1B: ADDR_STS4X (I2C address: 0x46)
* STS40-AD1B: ADDR_STS4X_ALT (I2C address: 0x44)
* STS40-BD1B: ADDR_STS4X_ALT2 (I2C address: 0x45)
*/
init_driver(ADDR_STS4X_ALT);
uint32_t serial_number;
error = sts4x_serial_number(&serial_number);
if (error) {
printf("Error executing sts4x_serial_number(): %i\n", error);
} else {
printf("Serial number: %u\n", serial_number);
}
// Start Measurement
for (;;) {
int32_t temperature;
// Read Measurement
error = sts4x_measure_high_precision(&temperature);
if (error) {
printf("Error executing sts4x_measure_high_precision(): %i\n",
error);
} else {
printf("Temperature: %.1f °C\n", temperature / 1000.0f);
}
sensirion_i2c_hal_sleep_usec(1000000);
}
return 0;
}
I do not get an output only the booting screen,
*** Booting nRF Connect SDK v3.5.99-ncs1-1 ***
My question is how can i setup my sensor and is there any obvious mistakes i have done in the setting up i2c device? because the code could not setup the i2c device properly.
This is the project file folder : 2084.sts4x.zip
