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cpu: pic32_common: Fix void pointer arithmetic in hw rng

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Signed-off-by: Francois Berder <fberder@outlook.fr>
This commit is contained in:
Francois Berder 2017-07-20 19:54:46 +01:00
parent 6a29140ae6
commit d8984a6aef
1 changed files with 7 additions and 6 deletions
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13
cpu/mips_pic32_common/periph/hwrng.c
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@ -46,6 +46,7 @@ void hwrng_init(void)
void hwrng_read(void *buf, unsigned int num)
{
unsigned int i = 0;
uint8_t *buffer = (uint8_t *)buf;
RNGCON |= _RNGCON_PRNGEN_MASK;
@ -55,9 +56,9 @@ void hwrng_read(void *buf, unsigned int num)
wait_plen_cycles();
rng1 = RNGNUMGEN1;
rng2 = RNGNUMGEN2;
memcpy(buf, &rng1, sizeof(rng1));
memcpy(buf + 4, &rng2, sizeof(rng2));
buf += 8;
memcpy(buffer, &rng1, sizeof(rng1));
memcpy(buffer + 4, &rng2, sizeof(rng2));
buffer += 8;
}
num &= 0x7;
@ -66,13 +67,13 @@ void hwrng_read(void *buf, unsigned int num)
wait_plen_cycles();
rng1 = RNGNUMGEN1;
memcpy(buf, &rng1, n);
memcpy(buffer, &rng1, n);
num -= n;
buf += n;
buffer += n;
if (num) {
uint32_t rng2 = RNGNUMGEN2;
memcpy(buf, &rng2, num);
memcpy(buffer, &rng2, num);
}
}