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cpu/sam3: fix hwrng peripheral register access

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Signed-off-by: Dylan Laduranty <dylan.laduranty@mesotic.com>
This commit is contained in:
Dylan Laduranty 2025-01-30 20:59:09 +01:00
parent 529a1e4d73
commit 6d641ffcf5
1 changed files with 4 additions and 4 deletions
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8
cpu/sam3/periph/hwrng.c
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@ -39,9 +39,9 @@ void hwrng_read(void *buf, unsigned int num)
uint8_t *b = (uint8_t *)buf;
/* enable clock signal for TRNG module */
PMC->PMC_PCER1 |= PMC_PCER1_PID41;
PMC->PMC_PCER1 = PMC_PCER1_PID41;
/* enable the generation of random numbers */
TRNG->TRNG_CR |= (KEY | TRNG_CR_ENABLE);
TRNG->TRNG_CR = (KEY | TRNG_CR_ENABLE);
while (count < num) {
/* wait until new value is generated -> takes up to 84 cycles */
@ -56,7 +56,7 @@ void hwrng_read(void *buf, unsigned int num)
}
/* disable the generation of random numbers */
TRNG->TRNG_CR &= ~(KEY | TRNG_CR_ENABLE);
TRNG->TRNG_CR = KEY;
/* disable clock signal for TRNG module */
PMC->PMC_PCER1 &= ~(PMC_PCER1_PID41);
PMC->PMC_PCDR1 = PMC_PCER1_PID41;
}