nrf52840 cc310 is not working

[skxo]

Hello,

I use nRF5SDK160098a08e2 SDK version, on ubuntu 16.04.

I use pca10056 (nrf52840 dev-kit).

I want to run cc310 example located at ./examples/crypto/nrf_cc310/

for example, I compile and load successfully aes binary into the device but nothing is printed over UART (TX pin is PA06, I verified in sdk_config).

I tried the sha example and The device is also not running.

If I compile and load a binary from nrf_crypto folder, everything is OK ( have tried rng, sha....) I can see my part debug printf.

So could you test on your side please?

What could be wrong here?

regards

sk

[Jørgen Holmefjord]

Hi,

The CC310 crypto examples do not do any logging over UART, it only provides logging over RTT. You can use J-Link RTT Viewer to see the output from the examples. 

That said, I highly recommend using the nrf_crypto examples with the CC310 backend, and not use the CC310 API directly.

Best regards,
Jørgen

[skxo]

Hi,

thank you for this fast answer. I will download RTT viewer. Could you elaborate on your recommendation about CC310 backend please? regards

[Jørgen Holmefjord]

You can read about the available backend in the SDK documentation: Cryptography library - nrf_crypto

When using the examples in examples\crypto\nrf_crypto\, check that NRF_CRYPTO_BACKEND_CC310_ENABLED is set in the sdk_config.h file (only supported in nRF52840/pca10056 projects).

[skxo]

OK cool, thanks.

I confirm I can see the debug output in RTT Viewer.

Regards

[skxo]

Hi,

in sdk_config.h, I can see

#ifndef NRF_CRYPTO_BACKEND_CC310_ENABLED
#define NRF_CRYPTO_BACKEND_CC310_ENABLED 1
#endif

Can you confirm the CC310 will be used as crypto-processor to compute crypto computations in that case?

regards