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spi: attempt to fix spi lsb mode

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Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
This commit is contained in:
Brendan Le Foll
2014-10-23 18:05:36 +01:00
parent 535d92ab79
commit 418c198999
1 changed files with 5 additions and 4 deletions
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9
src/spi/spi.c
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@@ -131,14 +131,15 @@ mraa_spi_frequency(mraa_spi_context dev, int hz)
mraa_result_t mraa_result_t
mraa_spi_lsbmode(mraa_spi_context dev, mraa_boolean_t lsb) mraa_spi_lsbmode(mraa_spi_context dev, mraa_boolean_t lsb)
{ {
uint8_t lsb_mode = 0; uint8_t lsb_mode = (uint8_t) lsb;
if (lsb == 1) {
lsb_mode = 1;
}
if (ioctl (dev->devfd, SPI_IOC_WR_LSB_FIRST, &lsb_mode) < 0) { if (ioctl (dev->devfd, SPI_IOC_WR_LSB_FIRST, &lsb_mode) < 0) {
syslog(LOG_ERR, "spi: Failed to set bit order"); syslog(LOG_ERR, "spi: Failed to set bit order");
return MRAA_ERROR_INVALID_RESOURCE; return MRAA_ERROR_INVALID_RESOURCE;
} }
if (ioctl (dev->devfd, SPI_IOC_RD_LSB_FIRST, &lsb_mode) < 0) {
syslog(LOG_ERR, "spi: Failed to set bit order");
return MRAA_ERROR_INVALID_RESOURCE;
}
dev->lsb = lsb; dev->lsb = lsb;
return MRAA_SUCCESS; return MRAA_SUCCESS;
} }