Posted on August 29, 2012 at 15:03Hi forum,
I'm having trouble getting the CRYP unit working on a ST32F407. First I've tried manually (failed) and -- thinking that I did something wrong -- tried with the ST provided libraries (which also don't work). I'm doing something wrong, I'm very sure, but I can't figure out what. First off: Yes, I have the device properly enabled:
[code]
RCC_AHB2PeriphClockCmd(RCC_AHB2Periph_CRYP, ENABLE);
[/code]
then, I use this:
[code]
CRYP_InitTypeDef x;
memset(&x, 0, sizeof(x));
x.CRYP_AlgoDir = CRYP_AlgoDir_Encrypt;
x.CRYP_AlgoMode = CRYP_AlgoMode_AES_ECB;
x.CRYP_DataType = CRYP_DataType_32b;
x.CRYP_KeySize = CRYP_KeySize_128b;
CRYP_Init(&x);
}
{
CRYP_KeyInitTypeDef x;
memset(&x, 0, sizeof(x));
CRYP_KeyInit(&x);
}
CRYP_FIFOFlush();
CRYP_Cmd(ENABLE);
/* Write input data */
for (int i = 0; i < 4; i++) {
CRYP_DataIn(((uint32_t*)aSource)[i]);
}
printf(''Waiting...\r\n'');
/* Wait until finished */
while (!CRYP_GetFlagStatus(CRYP_FLAG_OFNE));
[/code]
(this never finishes, i.e. it's not yielding any data). Then I tried the ''high level'' function, which should do everything for me
[code]
printf(''Result: %d\r\n'', CRYP_AES_ECB(MODE_ENCRYPT, (unsigned char*)aKey, 128, (unsigned char*)aSource, 16, aDestination));
[/code]
...which fails with error 1.
Any ideas?
Best regards,
Joe
#stm32f407-cryp-aes128
