Bug with Hashcrypt on LPC55S06

s_hdl — Fri, 25 Sep 2026 15:45:09 GMT

Hello,
I encounter an infinite loop in my attempt to use Hashcrypt HW acceleration.
The Hashcrypt driver version is 2.2.17. The microcontroller get stuck at the line 679 in hashcrypt_sha_one_block() :

while (0U == (base->STATUS & HASHCRYPT_STATUS_WAITING_MASK))

{

//stuck here

}

Surprisingly, it appears to be stuck after 90 executions (our microcontroller manages to perform 89 times hashcrypt_sha_one_block without being stuck).

The main call is done by embedTLS ssl_tls.c file (see err.png).

Here is my current implementation of mbedtls_sha256_finish() (that I needed to implement by defining the SHA256_ALT when building mbedTLS v3.6.7

int mbedtls_sha256_finish(mbedtls_sha256_context *ctx,unsigned char *output)

{

status_t status;

status = HASHCRYPT_SHA_Finish(

HASHCRYPT,

(hashcrypt_hash_ctx_t *)ctx->hash,

output,

NULL);

return status;

}

Our code is bare metal, we don't have different processes.

Thank you very much for your help.

Regards,

Harold

topic Bug with Hashcrypt on LPC55S06 in LPC Microcontrollers

Bug with Hashcrypt on LPC55S06