AM2434: UART DMA Configuration Error

Hello Hideaki,

Hi Anil,

Thank you for your suggestion. Based on the URL of the E2E thread which you provided, the customer were able to assign up to two DMAs to the UART, and confirmed that it could send and receive at half duplex.

However, assigning more than two DMAs to the UART resulted in the same error as before. They need 6 DMA transfers with the UARTs.

The same fixes were applied to the UART_echo_DMA project in the SDK, but it resulted in the same error as before.

UART/v0/LLD/DMA/UDMA/UART_DMA_UDMA.c:UART_udmaInitRxCh:96: UDMA_SOK == retVal failed ! ! !

In addition to the E2E threads you provided, what are the causes and workarounds needed to enable the UART to use six DMA transfers?

Could you helpt to provide any other solution ?

Thanks and regards,

Hideaki

Hello Hideaki,

In the above e2e, we have fixed the DMA channel config for two channels and the same procedure needs to apply for 6 channels.

The steps below need done for the 6 channels. For example, check the generated file for DMA ch config and copy it and do the like as below init.

gUartUdmaChConfig[1].drvHandle = &gUdmaDrvObj[0];

gUartUdmaChConfig[2].drvHandle = &gUdmaDrvObj[0];

gUartUdmaChConfig[3].drvHandle = &gUdmaDrvObj[0];

gUartUdmaChConfig[4].drvHandle = &gUdmaDrvObj[0];

gUartUdmaChConfig[5].drvHandle = &gUdmaDrvObj[0];

Regards,

Anil.

Hi Anil,

Thanks for your reply. The customer has already tried to apply the same procedure to 6 channels also, but the same error occurred.

Were you able to confirm that 6 channels worked correctly with the above configurations ?

Could you help to solve this issue, please.

Thanks and regards,

Hideaki

Hello Hideaki,

Please confirm on the customer side that the DMA is throwing an error at which DMA channel init ?

Like the DMA init is occurring on the 4th or 5th channel or any other channel number ?

Regards,

Anil.

Hi Anil,

The error occurs on 2ch, 3ch, 4ch and 5ch, not occurs on 0ch and 1ch.

Please help them to solve this issue as soon as possible.

Were you able to confirm that 6 channels work correctly ?

Thanks and regards,

Hideaki

Hello Hideaki,

I can check at my side and let you know the status on Tuesday next week.

Regards,

Anil.

Thanks, Anil.

I'm looking forward to your feedback by the next Tuesday.

Thanks and regards,

Hideaki

Hello Hideaki,

I am on leave today and will reproduce the above issue on Monday ..

Regards,

Anil

Anil,

How's progress ? PLEASE share the solution.

Regards,

Hideaki

Hello Hideaki,

Please find the analysis report below .

Root Cause:

The customer has enabled 6 UARTs, which require 6 TX and 6 RX DMA channels (total 12 channels).
However, in the current MCU+ SDK configuration, only 3 TX and 3 RX Packet DMA channels are allocated to the R5F0_0 core.
As a result, when the customer attempts to configure the 4th UART, a debug assertion is triggered due to unavailability of additional DMA channels.

Proposed Fix:

Allocate 6 TX and 6 RX Packet DMA channels to the R5F0_0 core to support all 6 UARTs.

Implementation Steps:

1. Open the RM SysCfg File:
• Navigate to the Resource Management (RM) .syscfg file in the project.

2. Update DMA Channel Allocation:
• Modify the configuration to allocate 6 TX and 6 RX Packet DMA channels to R5F0_0.

3. Recompile RM Configuration:
• Rebuild the rm_cfg.c file to apply the updated channel configuration.

4. Rebuild the SBL :
• If the customer is using SBL OSPI, compile it in release mode.

5. Flash the Updated SBL:
• Flash the newly built SBL binary to the board.

6. Test with UART Example:
• Load a UART example from CCS and verify if the issue persists.

Impact of This Change:
• Allocating all 6 TX and 6 RX Packet DMA channels to R5F0_0 may restrict other cores from using Packet DMA for generic peripherals, as no channels remain available for their use.

Example codes and Files : 

SBL : 

/cfs-file/__key/communityserver-discussions-components-files/908/sbl_5F00_null_5F00_am64x_2D00_evm_5F00_r5fss0_2D00_0_5F00_nortos_5F00_ti_2D00_arm_2D00_clang.zip

Application Example : 

/cfs-file/__key/communityserver-discussions-components-files/908/gpio_5F00_led_5F00_blink_5F00_am64x_2D00_evm_5F00_r5fss0_2D00_0_5F00_nortos_5F00_ti_2D00_arm_2D00_clang.zip

rm_cfg.c : 

/cfs-file/__key/communityserver-discussions-components-files/908/3652.sciclient_5F00_defaultBoardcfg_5F00_rm.c

rm_cfg file :

/cfs-file/__key/communityserver-discussions-components-files/908/am64x_2D00_evm.syscfg

Links to Modifying Resource allocation :

https://software-dl.ti.com/mcu-plus-sdk/esd/AM64X/11_00_00_15/exports/docs/api_guide_am64x/RESOURCE_ALLOCATION_GUIDE.html

Notes :

I have not verified functionally wise and just verified whether the debug assertion is throwing or not.

Please let me know if you face any errors during functionality.

Regards,

Anil.

Hi Anil,

Thank you for sharing the solution. They tried this solution, but ...

Swargam Anil said:

1. Open the RM SysCfg File:
• Navigate to the Resource Management (RM) .syscfg file in the project.

command : 

game -s -C tools/sysfw/boardcfg configure SOC=am64x

gmake -s -C tools/sysfw/boardcfg configure-gen SOC=am64x

2. Update DMA Channel Allocation:

They think the above "game" should be "gmake", correct ?

They executed two gmake commands, but the errors occurred like below.

Swargam Anil said:

game -s -C tools/sysfw/boardcfg configure SOC=am64x

When the above gmake command executed, the following error occurred.

Swargam Anil said:

gmake -s -C tools/sysfw/boardcfg configure-gen SOC=am64x

Also, the following error occurred when the above gmake command executed.

There is only C:\ti\motor_control_sdk_am243x_09_02_00_11\mcu_plus_sdk\tools\sysfw\boardcfg\respart\am243x, no am64x.

Could you help them to go ahead ?

Thanks and regards,

Hideaki

Hello Hideaki,

Please try the SOC command is am243x instead of am64x and see if this works or not.

gamke is the correct command.

Regards,

Anil.

Hi Anil, 

I have also tried this with the am243x input. Also tried changing SOC to device but no success. (Although it says make it is the equivalent of gmake that I am using)

Was this successful on your side?

Best regards,

Mari Tsunoda

Hello Mari,

I am able to open the syscfg with the command below 

Regards,

Anil.

Hi Anil,

Thank you for supporting this thread. Is it possible to verify the same procedures with MCU+ SDK 9.2 ?

It seems that you're using 10.01, but the latest Motor Control SDK supports MCU+ SDK 9.2.

Thanks and regards,

Hideaki

Hi Anil,

So we actually got the recommendation on E2E to use CCS theia so the customer has been developing with this.

They are also using Motor Control SDK v9.2 as Matsumoto-san has mentioned and are using the gmake command on the MCU+SDK folder within the Motor Control SDK. 

I have tried making changes to the imports.mak file to match ccstheia, but it results in errors. I have also tried with CCS eclipse and it seems to work better, but I am running into an error after the sysconfig menu pops up. 

Do you know if this works with the combination below? Could you check in your environment?

CCS Theia: v1.5.1

MCU+SDK folder within Motor Control SDK v9.2 

Best regards,

Mari Tsunoda

Hello Mari,

We provide support only for the MCU+ SDK and not with  the Motor Control SDK.

However, I will discuss the above issue with the internal Industrial SDK team and get back to you with an update.

Regards,

Anil.

Hi Anil,

While you are confirming with the industrial SDK team, could you also check whether there is a significant difference in using CCS Theia vs. CCS Eclipse to use this gmake command? When I compared the two on the Motor Control SDK, there was a difference. Could you confirm if it is the same for you when you use CCS theia on MCU+SDK v9.2?

Best regards,

Mari

Hi Anil, 

Could you tell me the difference between the two commands to open the rmcfg file?

I was actually able to run the first configure command and opened the rmcfg file using MCU+SDK 10.1, but the second command resulted in an error.

So my question is: Is it necessary to run both of these commands or whichever one works is ok?

Best regards,

Mari

Hello Mari,

I have checked the industrial SDK as well and there is no problem with the commands and they are running properly.

If you still face the issue, then you can go with the MCU+SDK recommended tools for both CCS and syscfg .

I am using the eclipse based.

This command opens the file.

Mari Tsunoda said:

game -s -C tools/sysfw/boardcfg configure SOC=am64x243x

This command is for after making changes to the file and copying the same file into the folder below. 

C:\ti\mcu_plus_sdk_am243x_10_01_00_32\source\drivers\sciclient\sciclient_default_boardcfg\am243x

Mari Tsunoda said:

gmake -s -C tools/sysfw/boardcfg configure-gen SOC=am64x243x

This command is for compiling the code.

Please look at the documentation.

https://software-dl.ti.com/mcu-plus-sdk/esd/AM243X/11_00_00_15/exports/docs/api_guide_am243x/RESOURCE_ALLOCATION_GUIDE.html

Regards,

Anil.

Hi Anil,

Thanks for the chat. As discussed, I will ask them to download the correct versions of SysConfig and CCS Eclipse that is referenced in the import file and ask them to try. (Also with changing to SOC=am243x) The remaining steps, they should be able to do if the gmake commands compile.

Best regards,

Mari Tsunoda

Hi Anil,

We checked with the customer yesterday, but they asked us if it is 100% not possible to use CCS Theia to recompile these files and libraries. 

They decided to use CCS Theia based on recommendation as was asked on E2E, so I believe we need to do the due diligence to adapt the library building for CCS theia. 

Is using CCS theia possible at all for this or is CCS Eclipse absolutely necessary?

Best regards,

Mari 

Mari Tsunoda said:

They decided to use CCS Theia based on recommendation as was asked on E2E, so I believe we need to do the due diligence to adapt the library building for CCS theia. 

Hello Mari,

Can you please share the E2e recommendation for the CCS Theia ?

Regards,

Anil.

Hi Anil,

This is the E2E thread where we received the recommendation to use CCS Theia at the beginning of their development cycle.

AM2434: CCS Theia for AM243x - Arm-based microcontrollers forum - Arm-based microcontrollers - TI E2E support forums

Best regards,

Mari