int init_trng() {
PRINTF("- initializing random number generator\r\n");
trng_config_t trngConfig;
TRNG_GetDefaultConfig(&trngConfig);
trngConfig.sampleMode = kTRNG_SampleModeVonNeumann;
int r = TRNG_Init(TRNG0, &trngConfig);
return r == kStatus_Success ? wc_InitRng(&rng) : r;
}
void trng_init(trng_t *obj)
{
trng_config_t trngConfig;
TRNG_GetDefaultConfig(&trngConfig);
/* Set sample mode of the TRNG ring oscillator to Von Neumann, for better random data.*/
trngConfig.sampleMode = kTRNG_SampleModeVonNeumann;
/* Initialize TRNG */
TRNG_Init(TRNG0, &trngConfig);
}
bool uc_init() {
if (initialized) return true;
trng_config_t trngConfig;
TRNG_GetDefaultConfig(&trngConfig);
trngConfig.sampleMode = kTRNG_SampleModeVonNeumann;
if (TRNG_Init(TRNG0, &trngConfig) != kStatus_Success) return false;
if (wc_InitRng(&uc_random)) return false;
#if !FSL_FEATURE_SOC_LTC_COUNT
PRINTF("- no LTC available\r\n");
#else
LTC_Init(LTC0);
#endif
initialized = true;
return true;
}
static void hw_rand_init(void)
{
#ifdef FREESCALE_KSDK_BM
trng_config_t trngConfig;
TRNG_GetDefaultConfig(&trngConfig);
/* Set sample mode of the TRNG ring oscillator to Von Neumann, for better random data.*/
trngConfig.sampleMode = kTRNG_SampleModeVonNeumann;
/* Initialize TRNG */
TRNG_Init(TRNG0, &trngConfig);
#else
/* Enable RNG clocks */
SIM->SCGC6 |= SIM_SCGC6_RNGA_MASK;
SIM->SCGC3 |= SIM_SCGC3_RNGA_MASK;
/* Wake up RNG to normal mode (take out of sleep) */
RNG->CR &= ~RNG_CR_SLP_MASK;
/* Enable High Assurance mode (Enables notification of security violations via SR[SECV]) */
RNG->CR |= RNG_CR_HA_MASK;
/* Enable RNG generation to RANDOUT FIFO */
RNG->CR |= RNG_CR_GO_MASK;
#endif
}
