I am using UART 3 on imx6 and I want to know when my first byte is being sent.
At the moment, I'm polling the TXDC flag to know it but I want to do it with an interrupt.
The TCEN bit in UCR4, allows the interrupt to be asserted (interrupt_uart) but I don't know how to catch it !
I've configure many register to generate this interrupt but I don't know how to catch it ...
I you have any answers or tips to help me, it would be nice !
Thank you already ,