AMIC110: Conflict between UART DMA and NDK in TI-RTOS

Kevincw Wang

Part Number: AMIC110
Other Parts Discussed in Thread: SYSBIOS

Hi Sirs,

I have a project using both uart and NDK for tcp server, and I need to enable uart dma for receiving large amount of consecutive data.

https://e2e.ti.com/support/processors-group/processors/f/processors-forum/865499/compiler-processor-sdk-am437x-nimu-example-with-uart-dma

I am facing same issue as the post above, when I set UART.Settings.useDma = "true"; in cfg file, can't even ping IP address,

but it will turn fine after remove UART.Settings.useDma = "true";

The post have discussion about UART and NDK/NIMU may conflict but still don't have any solution

These are the version of library I've used

Looking forward for some advice, thanks very much.

over 1 year ago

0 Kevincw Wang over 1 year ago

Prodigy 30 points

Hi Sirs,

As I keep debugging, I found these two instruction conflict

UART.Settings.useDma = "true";

emac_open(0U, &open_cfg); (which in cpsw_nimu_eth.c)

setting UART.Settings.useDma = "true"; will cause emac_open() behaviour turns very weird, even it won't return( maybe jump to strange place )

First I wonder why configuring UART dma will cause emac functoin abnornal

It seems like a bug that will cause crashes

May any experts can help to reproduce this issue and give us solution?

Thank you

0 Jianzhong Xu over 1 year ago in reply to Kevincw Wang

TI__Mastermind 40225 points

Hello Kevincw,

I'm sorry, but TI has stopped supporting TI-RTOS (SYSBIOS) based and bare-metal SW development for AMIC110. Please refer to the announcement and find consolidated resources there.

Regards,

Jianzhong

0 Kevincw Wang over 1 year ago in reply to Jianzhong Xu

Prodigy 30 points

Hi Jianzhong,

My project will fail if not using DMA to transfer uart :( ,sad to hear that TI-RTOS had stop support.

At least may I know what was happened when I config UART.Settings.useDma = "true" in cfg files?

So I can check that there is still chance I can modify myself

+1 Jianzhong Xu over 1 year ago in reply to Kevincw Wang

TI__Mastermind 40225 points

Hi Kevincw,

When you have useDma = "true", you'll be using the UART lib with DMA. The UART lib folder in the PDK has two flavors of libs, one without using DMA and one using DMA. Please see picture below:

Regards,

Jianzhong

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AMIC110: Conflict between UART DMA and NDK in TI-RTOS