mirror of
https://github.com/peter-tanner/neptunium-firmware.git
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59 lines
2.3 KiB
Markdown
59 lines
2.3 KiB
Markdown
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# 1 - Introduction
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Sensor driver for LPS22HB sensor written in C programming language. This repository contains the sensor driver files (.h and .c) to be included, or linked directly as a git submodule, in your project. The driver is MISRA compliant and the documentation can be generated using the [Doxygen](http://www.doxygen.org/) tool.
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In order to `clone` the complete content of the repository folder, use the command:
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```
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git clone https://github.com/STMicroelectronics/LPS22HB-PID/
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```
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Some examples of driver usage can be found [here](https://github.com/STMicroelectronics/STMems_Standard_C_drivers).
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------
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# 2 - Integration details
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The driver is platform-independent, you only need to define two functions for read and write transactions from the sensor hardware bus (ie. SPI or I²C). **A few devices integrate an extra bit in the communication protocol in order to enable multi read/write access, this bit must be managed in the read and write functions defined by the user.** Please refer to the read and write implementation in the [reference examples](https://github.com/STMicroelectronics/STMems_Standard_C_drivers/tree/master/lps22hb_STdC/examples).
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### 2.a Source code integration
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- Include in your project the driver files of the sensor (.h and .c)
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- Define in your code the read and write functions that use the I²C or SPI platform driver like the following:
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```
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/** Please note that is MANDATORY: return 0 -> no Error.**/
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int32_t platform_write(void *handle, uint8_t Reg, const uint8_t *Bufp, uint16_t len)
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int32_t platform_read(void *handle, uint8_t Reg, uint8_t *Bufp, uint16_t len)
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```
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- Declare and initialize the structure of the device interface:
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```
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xxxxxxx_ctx_t dev_ctx; /** xxxxxxx is the used part number **/
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dev_ctx.write_reg = platform_write;
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dev_ctx.read_reg = platform_read;
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```
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- If needed by the platform read and write functions, initialize the handle parameter:
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```
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dev_ctx.handle = &platform_handle;
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```
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Some integration examples can be found [here](https://github.com/STMicroelectronics/STMems_Standard_C_drivers/tree/master/lps22hb_STdC/examples).
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### 2.b Required properties
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> - A standard C language compiler for the target MCU
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> - A C library for the target MCU and the desired interface (ie. SPI, I²C)
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------
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**More Information: [http://www.st.com](http://st.com/MEMS)**
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**Copyright (C) 2021 STMicroelectronics**
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