riot-ci/RIOT
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

cpu/samd21: fixed broken spi_transfer_byte function

Browse Source
This commit is contained in:
Hauke Petersen 2015-05-19 18:05:36 +02:00
parent 29552fba44
commit f0d9574de1
1 changed files with 7 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
cpu/samd21/periph/spi.c
View File

@ -217,7 +217,7 @@ int spi_release(spi_t dev)
int spi_transfer_byte(spi_t dev, char out, char *in) int spi_transfer_byte(spi_t dev, char out, char *in)
{ {
SercomSpi* spi_dev = 0; SercomSpi* spi_dev = 0;
int transfered = 0; char tmp;
switch(dev) switch(dev)
{ {
@ -235,18 +235,15 @@ int spi_transfer_byte(spi_t dev, char out, char *in)
while (!spi_dev->INTFLAG.bit.DRE); /* while data register is not empty*/ while (!spi_dev->INTFLAG.bit.DRE); /* while data register is not empty*/
spi_dev->DATA.bit.DATA = out; spi_dev->DATA.bit.DATA = out;
transfered++;
while (!spi_dev->INTFLAG.bit.RXC); /* while receive is not complete*/
tmp = (char)spi_dev->DATA.bit.DATA;
if (in != NULL) if (in != NULL)
{ {
while (!spi_dev->INTFLAG.bit.RXC); /* while receive is not complete*/ in[0] = tmp;
*in = spi_dev->DATA.bit.DATA;
transfered++;
} }
else return 1;
{
spi_dev->DATA.reg;
}
return transfered;
} }
int spi_transfer_bytes(spi_t dev, char *out, char *in, unsigned int length) int spi_transfer_bytes(spi_t dev, char *out, char *in, unsigned int length)