This repository contains the embedded i2c driver sources for Sensirion's SPS product line.
If you just want to use the driver, it is recommended to download the release zip from https://github.com/Sensirion/embedded-sps/releases
The UART driver of the SPS is available in the embedded-uart-sps repository.
Arduino (i2c): https://github.com/Sensirion/arduino-sps
git clone --recursive https://github.com/Sensirion/embedded-sps.git
embedded-common
submodule repository for common HALsps30-i2c
SPS30 i2c driverMake sure that the SPS30's Pin 4 ("Interface select") is connected to GND, on power-up of the sensor, otherwise the sensor works in UART instead of i2c mode. Note that the interface-select configuration is read on every start of the sensor including after a soft-reset.
The i2c wires need appropriate pull-up resistors if they're not included or enabled in your microprocessor.
make release
This will create a release folder with the necessary driver files in it, including a Makefile. That way, you have just ONE folder with all the sources ready to build your driver for your platform.
To adapt the driver to your platform, you only need to touch the following
sensirion_arch_config.h
(architecture specifics, you need to specify
the integer sizes if your compiler toolchain does not provide stdint.h
)and depending on your i2c implementation either of the following:
embedded-common/hw_i2c/sensirion_hw_i2c_implementation.c
functions for hardware i2c communication if your platform has a dedicated I2C
controller.embedded-common/sw_i2c/sensirion_sw_i2c_implementation.c
functions for software i2c communication if your platform does not have a
dedicated I2C controller and communication happens with GPIOs. In this case
you need to make sure that appropriate I2C pull-up resistors are used.Adjust sensirion_arch_config.h
if you don't have the <stdint.h>
header
file available.
Either use one of the provided sample implementations implement necessary
functions in one of the *_implementation.c
files described above (either in
the hw_i2c
or sw_i2c
folder).
To reuse a provided sample implementation you can specify it in a custom
build configuration. For this adapt the file user_config.inc
in the
driver:
user_config.inc
for hardware i2c with dedicated i2c controller:
CONFIG_I2C_TYPE=hw_i2c
hw_i2c_impl_src = ${embedded-common}/hw_i2c/sample-implementations/linux_user_space/sensirion_hw_i2c_implementation.c
user_config.inc
for software i2c with bit-banging on GPIOs:
CONFIG_I2C_TYPE=sw_i2c
sw_i2c_impl_src = ${embedded-common}/sw_i2c/sample-implementations/linux_user_space/sensirion_sw_i2c_implementation.c
Run make
Run the compiled example usage with ./sps30_example_usage
. Note that
hardware access permissions (e.g. sudo
) might be needed.
Please check the embedded-common repository for further information and sample implementations.