TDA4VM: custom layer bug

user6442695

Part Number: TDA4VM

Hi, engineers:

I created a Sigmoid Custom Layer using LUT.Everything was fine. But when I used C7X instructions,the following error occurred on the development board:

It looks like the C7X is not running.I just added the following code:

This code runs fine in PC emulation mode.

ps:This mistake comes up a lot.For example, if I add printf("[%d %d]", I,pInChannel[I],pOutChannel[I]), I will get an error.If I change the pInChannel[I] to a fixed value of 2, it will work.

Because C7X is not running, I have no way of knowing what went wrong.Is there any detail that I missed?

Thanks！

over 5 years ago

0 Anshu Jain over 5 years ago

TI__Guru 56820 points

Hi,

Sigmoid layer is natively supported by TIDL. Any reason you are not using it

Regards,

Anshu

0 user6442695 over 5 years ago in reply to Anshu Jain

Prodigy 20 points

Hi Anshu,

I have exported three models using the official Sigmoid Layer. However, I checked the output data of Sigmoid Layer and found that its calculation result was wrong. So I masked the official method and implemented Sigmoid Layer by writing Custom Layer.The SDK version I'm using is 07.02.

Regards,

0 Anshu Jain over 5 years ago in reply to user6442695

TI__Guru 56820 points

Hi Li,
We have made few fixes to sigmoid layer as part of SDK 7.3. Can you give a try with it? If the issue is already fixed then it might be faster solution then implementing it as custom layer.

Regards,

Anshu

+1 user6442695 over 5 years ago in reply to Anshu Jain

Prodigy 20 points

Hi Anshu,

Our product version is set at 07.02，and we have no plans to upgrade. Can you give me a patch for version 0702 to fix Sigmoid layer？

However, I still have questions about the LUT using and C7X firmware running failure mentioned above. Can you help me to explain these two questions?

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TDA4VM: custom layer bug