LPC Microcontrollers中的主题 Re: protocol usart problem

protocol usart problem

Nadia — Thu, 18 Mar 2021 10:55:06 GMT

Good afternoon, everyone. I am using a LPC54616 microcontroller. I am trying to communicate with the EMIC2 text-to-speek board, using a USART protocol. I have to send characters and the board answers me with characters, for sending and receiving I am using these functions: USART_ReadByte USART_WriteBlocking I'm having problems, I don't know if someone could tell me how to do it correctly. Thank you very much, best regards

Re: protocol usart problem

frank_m — Thu, 18 Mar 2021 11:07:13 GMT

You might want to be a bit more specific, especially about the problems.

No reception, garbled messages, hardfault ?

Blocking function might cause problems. The transmission of a byte via takes a relatively long time, compared the the MCU's instruction speed.

Re: protocol usart problem

diego_charles — Fri, 19 Mar 2021 17:25:21 GMT

Hi Nadia,

I hope you are doing well

Could you detail us your issues?

By the way ,are you using the USART SDK examples? Some of them implement UART blocking and others the UART non blocking functions (see ring buffer examples )

Diego