HAL I2C Communication Problem

Posted on July 14, 2017 at 11:52

Dear Sir/Madam,

I am working on STM32F405 mcu.

I developed my code on cubemx and HAL drivers.

I want to interface microchip adc 'MCP3428' via HAL I2C drivers but unfortunately i was failed.

Anybody of you please help me to resolved this issue.

Thank you.

This topic has been closed for replies.

Best answer by john doe

Posted on July 14, 2017 at 19:45

status = HAL_I2C_Mem_Write(&hi2c1, // i2c handle

(uint16_t)(dev_addr<<1), // i2c address, left aligned

(uint8_t)reg_addr, // register address

I2C_MEMADD_SIZE_8BIT, // 8bit register addresses

(uint8_t*)(&reg_data), // write returned data to variable named reg_data

cnt, // write how many bytes

100); // timeout

you'll have to read your data sheet for addresses and sizes, but the above code is how to read a register

john doeBest answer

Senior III

Posted on July 14, 2017 at 19:45

status = HAL_I2C_Mem_Write(&hi2c1, // i2c handle

(uint16_t)(dev_addr<<1), // i2c address, left aligned

(uint8_t)reg_addr, // register address

I2C_MEMADD_SIZE_8BIT, // 8bit register addresses

(uint8_t*)(&reg_data), // write returned data to variable named reg_data

cnt, // write how many bytes

100); // timeout

you'll have to read your data sheet for addresses and sizes, but the above code is how to read a register

Associate III

Posted on July 17, 2017 at 11:39

Thank you so much.

My problem is solved.

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