MSP432P401R: UART Read / write buffer flush

Black

Part Number: MSP432P401R

Hi,

How to flush the read and write buffer of UART?

I'm interfacing MSP432P401R with Uart to another micro, while sending/receiving if some data is lost means, i want to flush the uart buffer before reading / writing new data. I couldn't find any API to flush the buffer, is there any mechanism / API available to flush the UART buffer.

Regards,

Black

over 6 years ago

0 Seong Kim over 6 years ago

TI__Mastermind 47436 points

Hey Black,

I'll look into this and get back to you shortly.

BR,

Seong

0 Black over 6 years ago in reply to Seong Kim

Intellectual 260 points

Hi Seong,

Any update?

BR,

Black

0 Keith Barkley over 6 years ago in reply to Black

Guru 42215 points

It does not buffer in the sense of waiting for a certain number of characters and then sending them, it is just a FIFO that starts to send as soon as you give it data. What drivers are you using for the UART? if it blocks, it does not return until all the characters are sent.

0 Black over 6 years ago in reply to Keith Barkley

Intellectual 260 points

Hi Keith,

Thanks for your response.

I understand it is FIFO, my intention here is i'm trying to read 6 bytes payload of data 1 byte at a time. In the 1st byte if i not received the expected value means i want flush the rest of available data in buffer without processing. Is there any APIavailable for that?

BR,

Black

0 Seong Kim over 6 years ago in reply to Black

TI__Mastermind 47436 points

Black,

The MSP432's API Reference page is here.

Reading through the UART.h File Reference, I see that you can use UART_control() and pass the command code, UART_CMD_RXDISABLE, to disable the data received by the UART. Have you tried using this command?

BR,

Seong

**Attention** This is a public forum

MSP low-power microcontrollers

MSP low-power microcontroller forum

MSP432P401R: UART Read / write buffer flush