Need help in reading data from a pressure sensor

PReba.1 · ‎2022-12-13

Hi!

I'm new to embedded programming and I'm trying to write a minimal program using I2C to read data from a pressure sensor.

I'm using the STM32F429 board and the Sen-16476 Sparkfun pressure sensor.

I'm unsure about which pins I need to connect between the sensor and the board, and how I should read the data in my cpp program. I've tried all combinations of connections and read addresses and nothing seems to work.

I'd appreciate any help/code snippets to just get the basic reading of the sensor. Thank you!

Tesla DeLorean · ‎2022-12-13

What STM32F429 board? The DISCO?

Wire 3V3, GND, SCL, SDA

Find available I2C interface pins on the STM32, check the manual/schematic

Address in STM32 space likely (0x18 << 1)

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Foued_KH · ‎2022-12-16

Hello @PReba.1,

First of all you need to set the configuration of the I2C for the communication based on STM32CubeMX :

You can choose the Standard mode 100 KHz or the Fast mode 400 KHz.

Set the GPIO at the PULL-UP :

Then generate The code.

The I2C address of the sensor : 0x18

Supply voltage : 1.6V - 3V6

Connect the 3V3, GND, SCL, SDA.

Foued.

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