2020-07-31 07:25 AM
1) I have configured PG8 gpio as external interrupt mode.
2) When i am writing data using I2C3 , EXTI9_5_IRQ Handler is getting trigger,but their is no activity in PG8 pin.
What is the reason for this problem.
I2C3 GPIOs.
PC9 -> SDA
PA8 -> SCL
2020-07-31 07:32 AM
Observe the EXTI_PR register to find out, which line caused the interrupt.
JW
2020-07-31 07:44 AM
Checking for crosstalk and monitoring EXTI on oscillosope probe could help.
Activating internal pull-up resistor on EXTI might also help?