UART receive multi byte.

Huy Phuc Bui10

I want to receive more than 16 byte via UART0 on TM4C1294 launch pad. But FIFO have lest than 16 byte and when I send more than 14 byte from my PC to the launch pad, launch pad can't receive frame correctly.

Are any body have some idea to solve that?

over 9 years ago

0 Robert Adsett over 9 years ago

Guru 27665 points

Have you read the manual?
Have you tried the Tivaware examples?

Robert

0 cb1 over 9 years ago in reply to Robert Adsett

Guru 47900 points

(Mean) Robert sighting... (but a justifiable one)

0 Huy Phuc Bui10 over 9 years ago in reply to Robert Adsett

Prodigy 20 points

Yes I have. Easily to transmit and receive frame lest than 14 byte (FIFO level 7/8). I have transmit multi byte via uart with udma, but I can't receive more than 14 byte. I have try to udma_demo but problem still unsolved.

In the udma_demo, funcition InitUART1Transfer.

I see:

uDMAChannelAttributeEnable(UDMA_CHANNEL_UART1TX, UDMA_ATTR_USEBURST);

I trying to:

uDMAChannelAttributeEnable(UDMA_CHANNEL_UART1TX | UDMA_CHANNEL_UART1RX, UDMA_ATTR_USEBURST);

0 Robert Adsett72 over 9 years ago in reply to Huy Phuc Bui10

Guru 10570 points

Use interrupts or polling. DMA adds unnecessary complications.

Robert

0 Amit Ashara over 9 years ago in reply to Huy Phuc Bui10

TI__Guru**** 244400 points

Hello Huy,

Can you enable the timeout interrupt so that if there are residual bytes in the FIFO, then they can be read by means of a timeout interrupt status.

Regards
Amit

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UART receive multi byte.