AES Module Unable to get request through DMA Module in CC2530

Ashank Panwar

Other Parts Discussed in Thread: CC2530

We are using the CC2530 chip. We are trying to use the AES co-processor for encoding/decoding in conjuction with DMA. Now, AES encryption/decryption module requires a key and initialization vector to be loaded into the AES module. We are trying to load the same through DMA. However the DMA module is not getting DMA request from the AES module. We are using the sample code provided by TI (which is for some other family of RF chips). Please respond on the same ASAP.

over 15 years ago

0 Ashank Panwar over 15 years ago

Prodigy 60 points

These files are attached for the above problem.2234.31-DEC-2010 AES IMPLEMENTATION.rar

0 Thomas F. over 15 years ago in reply to Ashank Panwar

Prodigy 120 points

Hi,

I found a post by "Kjetil":

> Found a weakness (bug) in the DN.Ordering of bitfield members in structs is compiler specific. By default, IAR and most others places bitfield members from the least significant bit to the most significant bit. The code in the DN does it the other way around and thus it will not work. You will either have to rearrange this or do the following:

    #pragma bitfields=reversed
    typedef struct {
      unsigned char SRCADDRH; // High byte of the source address
      unsigned char SRCADDRL; // Low byte of the source address
      ........

The code seems to depend on the memory model used for the DMA configuration structure.

It did the trick for me.

0 Ashank Panwar over 15 years ago in reply to Thomas F.

Prodigy 60 points

Thanks..

It worked for me also...

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AES Module Unable to get request through DMA Module in CC2530