TDA2EG-17: some problems with UART driver in edma mode

user4238397

Part Number: TDA2EG-17

Hi, TI experts
SOC, TDA2EG-17; SDK, ti-processor-sdk-rtos-automotive-dra7xx-evm-04.03.00.05; A15 run linux, DSP run sys/bios.

UART not worked , when I used UART driver in EDMA mode on DSP core. I have some problems below. notes, I used DSP_EDMA(0x01d10000).
1. PDK UART driver example do not use EDMA mode in fact, because I found .cfg file not use "UART.Settings.useDma = "true";", so can't invoke "ti.drv.uart.dma.ae66"

2. EDMA Default Request Mapping not worked on DSP's EDMA? I found DSP's EDMA have own Request Mapping. below

3. So I do Requset Mapping as below, and change soc UART_HwAttrs.

4. UART do not work, I debug in uart driver code, code have pend on "semStatus = UART_osalPendLock(object->writeSem,transaction->timeout);", in other word, "UART_txIsrHandler" function don't be invoked.

over 6 years ago

0 user4238397 over 6 years ago

Prodigy 160 points

no body?

0 Prasad Konnur over 5 years ago in reply to user4238397

TI__Expert 6065 points

Hi,

Sorry this thread got lost.

Let me know if you are still stuck at this issue.

Regards,
Prasad

0 user4238397 over 5 years ago in reply to Prasad Konnur

Prodigy 160 points

Yes， it stuck at me now, I need help.

thanks

0 Prasad Konnur over 5 years ago in reply to user4238397

TI__Expert 6065 points

Hi,

You are referring the uart echo example right?
This is built and verified to run from the IPU1_0 core.

How are you building the example? This is built using the make files.
Also for the uart edma there is no seperate library. the uart lib supports all modes including the edma mode.
This is a parameter passed during the GIO add device, check the uartSample_main.c file.

There are 2 instances of the EDMA one is system edma which is used in the example.
You can use this instance of edma as well from DSP core.
There is another instance of DSP EDMA.
If you want to switch to this instance you need to do the crossbar setting as you are doing.
But you need to update the instance number passed to the edma3init API call to get the EDMA driver handle for the DSP EDMA instance.

Regards,
Prasad

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TDA2EG-17: some problems with UART driver in edma mode