PowerQUICC Processors中的主题 mpc8306 DMA for UART and CAN BUS

mpc8306 DMA for UART and CAN BUS

00lirui — Fri, 10 Apr 2015 13:19:06 GMT

Hello.

Can I take advantage of DMA for UART receive and transfer data? Is there some code example for it ?

thanks!

Re: mpc8306 DMA for UART and CAN BUS

alexander_yakov — Fri, 10 Apr 2015 14:15:47 GMT

Which UART you are using - DUART or QE UART?

Re: mpc8306 DMA for UART and CAN BUS

00lirui — Sat, 11 Apr 2015 05:50:35 GMT

DUART, But can it work on QE UART?

Re: Re: mpc8306 DMA for UART and CAN BUS

Pavel — Mon, 13 Apr 2015 09:26:20 GMT

The main advantage of the DMA is that DMA and Core can access the SDRAM simultaneously. The DMA has the advantage that it can execute bursts on the bus.

It reduces utilization of the core.

See attached file. It is simple program example for DUART FIFO using on the MPC8349.

Similar code can be used on the MPC8306.

Re: mpc8306 DMA for UART and CAN BUS

00lirui — Mon, 13 Apr 2015 14:29:36 GMT

Thank you,

But the code I can see is something about DUART FIFO,not take adantage of DMA.

Am I right?