I working on a project, that uses UART transmission, So as I am using stm32 MCU, And I am using receive call back function successfully by interrupt method, But i want to know, Can we use user-defined receive call-back function with an interrupt method?

[KnarfB]

Yes, that's the way to do. If you work with HAL, you define your own HAL_UART_RxCpltCallback which overrides the weak "do nothing" callback in HAL. Alternatively, you find the native interrupt handlers like USART2_IRQHandler in a generated *_it.c file.

hth

KnarfB

[Tesla DeLorean]

You have ALL the source, you can implement it any way you want.

Most STM32 interrupt on every received character.

You don't need to call into the HAL call-back mechanics.