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cpu/nrf51822: fixed spi_transfer_bytes

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This commit is contained in:
Hauke Petersen 2015-04-28 15:55:41 +02:00
parent 3876823c21
commit 6bf31c6e01
1 changed files with 6 additions and 2 deletions
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8
cpu/nrf51822/periph/spi.c
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@ -185,16 +185,20 @@ int spi_release(spi_t dev)
int spi_transfer_bytes(spi_t dev, char *out, char *in, unsigned int length)
{
char tmp;
if (dev >= SPI_NUMOF) {
return -1;
}
for (int i = 0; i < length; i++) {
tmp = (out) ? out[i] : 0;
spi[dev]->EVENTS_READY = 0;
spi[dev]->TXD = (uint8_t)out[i];
spi[dev]->TXD = (uint8_t)tmp;
while (spi[dev]->EVENTS_READY != 1);
tmp = (char)spi[dev]->RXD;
if (in) {
in[i] = (char)spi[dev]->RXD;
in[i] = tmp;
}
}