diff options
Diffstat (limited to 'libmaple/spi.c')
| -rw-r--r-- | libmaple/spi.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/libmaple/spi.c b/libmaple/spi.c index 4f34d1a..aa75c5f 100644 --- a/libmaple/spi.c +++ b/libmaple/spi.c @@ -130,7 +130,8 @@ uint8 spi_tx_byte(uint32 spi_num, uint8 data) { uint8 spi_tx(uint32 spi_num, uint8 *buf, uint32 len) { SPI *spi; - uint32 i; + uint32 i = 0; + uint8 rc; ASSERT(spi_num == 1 || spi_num == 2); spi = (spi_num == 1) ? (SPI*)SPI1_BASE : (SPI*)SPI2_BASE; @@ -140,13 +141,15 @@ uint8 spi_tx(uint32 spi_num, uint8 *buf, uint32 len) { } while (i < len) { - spi->DR = buf[len]; + spi->DR = buf[i]; while (!(spi->SR & SR_TXE) || - (spi->SR & SR_BSY)) + (spi->SR & SR_BSY) || + !(spi->SR & SR_RXNE)) ; + rc = spi->DR; i++; } - return spi->DR; + return rc; } static void spi_gpio_cfg(const spi_dev *dev) { |