TMS570LS3137

huichun xing

I can configure the SCI/LIN for UART working well for TX multi buffer mode. However in RX, due the buffer sized, it can only trigger interrupt after the buffer size bytes are received. If the stream size is not exact certain number times the buffer bytes(for eample, buffer size =8 bytes, stream size=12 bytes), there is no interrupt for the last 4 bytes since it is full buffer frame yet. If there any way to handle it? or we can only use single buffer mode.

over 12 years ago

0 Zhaohong Zhang over 12 years ago

TI__Mastermind 22715 points

Huichuan,

If the message size (number of bytes for TX/RX) is dynamically changing, you can only single buffer mode. If the message size in kown before TX/RX, I would suggest you to use DMA with SCI/LIN.

Thanks and regards,

Zhaohong

0 huichun xing over 12 years ago in reply to Zhaohong Zhang

Intellectual 425 points

I can use manual timer out to decide if it is last frame. However, for muti buffer, is LINRD cleared after read which I can use to manually decide the last frame character not hte left characters from previous frame?

0 Zhaohong Zhang over 12 years ago in reply to huichun xing

TI__Mastermind 22715 points

Huichuan,

Use time out in a normal communication operation will make it too complicated. I would avoid it.

Thanks and regards,

Zhaohong

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TMS570LS3137