I used I2C bus in STM32F429II for getting data from I2C sensors. As I can get data a few hours, suddenly, i2c bus communication is not success. The time is changed, not fixed period.
So I debugged native source with ST-Link. Target file (STM32F4_i2c_functions.cpp) is in
There are two interrupts for getting event or error interrupt. And I could find the interrupt working like below:
CASE1) Success on I2C communication
-> Only STM32F4_I2C_ER_Interrupt is called when I send command
CASE2) Sensor is not connected or Sensor cannot get data from first data request command
-> STM32F4_I2C_ER_Interrupt and STM32F4_I2C_EV_Interrupt are called in turn
CASE3) While data communication works, suddenly it is not
-> Never called the interrupt
What I want to figure out is case3, and it is from which side in hw or sw. I guess it’s on sw and looking for error in related registers.
Is there anyone who find same issue?