topic Re: USART interrupt in LPC Microcontrollers

USART interrupt

rudomanenko — Thu, 01 Nov 2018 08:51:34 GMT

Hi everyone! I am trying to implement connection between Smart Card and LPC11Uxx via USART using interrupt. Current level - get ATR. Without interrupt everything works well, but with them - everything is crashing. Here is screenshots of my code below. Maybe I don't undestand how to work with interrups?
P.S. I already saw NXP emaples and even with them it is not so clear for me

Re: USART interrupt

jeremyzhou — Fri, 02 Nov 2018 03:32:30 GMT

Hi Anton Rudomanenko,

Thank you for your interest in NXP Semiconductor products and for the opportunity to serve you.
Actually, I don't find some clues after reviewing the screenshots and I'd like to get more information, so I was wondering if you can introduce the issue in details.
Have a great day,
TIC

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Re: USART interrupt

rudomanenko — Fri, 02 Nov 2018 06:22:03 GMT

thank again, dear jeremyzhou. But the problem was in startup file)

Re: USART interrupt

jeremyzhou — Mon, 05 Nov 2018 02:49:01 GMT

Hi Anton Rudomanenko,

Thanks for your reply.
Maybe I can send you an updated startup file if you can tell me which IDE you use.
Have a great day,
TIC

Re: USART interrupt

rudomanenko — Tue, 06 Nov 2018 06:57:37 GMT

I think that the reason is that this project was inherited by me from the other programmer, who commented line with necessary interrupt

Re: USART interrupt

michalisantonio — Mon, 04 Feb 2019 15:03:19 GMT

How to configure CTS pin, flexomm1, of QN9080DK to communicate to RTS pin of USART to RS485 converter?

I use usart_interrupt SDK example but can only send when connect RTS pin of USART to RS485 converter to QN9080DK ground. QN9080DK can only receive when connect RTS pin of USART to RS485 converter to QN9080 3.3V.

I use following set up in pin_mux.c but doesn't work when use CTS