# Atmospheric pressure sensor BMP280_spi

<span style="font-size:16px;">Reference tutorial</span>

<span style="font-size:16px;">
[SCM BMP280 (GY-BM E/P 280 module) atmospheric pressure and temperature sensor use detailed explanation](https://blog.csdn.net/sunshinebooming/article/details/79637822 "SCM BMP280 (GY-BM E/P 280 module) atmospheric pressure and temperature sensor use detailed explanation")
[STM32 driver BMP280 module](https://blog.csdn.net/bdjsm_hh/article/details/107623788 "STM32 driver BMP280 module")
</span>
**<span style="font-size:16px;">Note: When writing, the highest position is 0, and when reading, the highest position is 1. Please refer to the data sheet below for details</span>**

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![](././../../images_dir/1625021847/1.png)
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<span style="font-size:16px;">Bmp280 module installation diagram</span>

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![](././../../images_dir/1625021989/2.png)
![](././../../images_dir/1625022026/3.png)
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Source Code Path:
driver_210519mp280_spi1

Powering code： bmp280_drv.c
Compiler：
1、Copy "driver_210519 mp280_spi1" to the "lichee" directory in tina-d1 sdk
2、Enter bmp280_spi1 and execute the "make" command to generate the bmp280_drv.ko file
3、Copy to the development board, execute insmod bmp280_drv.ko, load the driver module and view the device "/dev/bmp280", as shown below
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![](././../../images_dir/1625022099/4.png)
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Device tree file and adding nodes:
driver_210519sunxi-dts board.dts
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rvboards_bmp280:bmp280@0{
	        device_type = "spibmp280";
	        compatible = "tina-d1,rvboards-bmp280";
	        spi-max-frequency = <500000>;
	        reg = <0>;
	        status = "okay";
	        cs_gpio = <&pio PD 10 GPIO_ACTIVE_HIGH>;
	    };

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User layer test program: bmp280_user.c
Compile and execute:
1、Copy bmp280_user.c to the development board
2、Execute gcc -o bmp280_user bmp280_user.c to compile and generate bmp280_user execution program
3、Test command: ./bmp280_user /dev/bmp280
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![](././../../images_dir/1625031254/5.png)
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![](././../../images_dir/1703141148/4.png)
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