diff options
Diffstat (limited to 'libmaple/spi.h')
| -rw-r--r-- | libmaple/spi.h | 63 |
1 files changed, 32 insertions, 31 deletions
diff --git a/libmaple/spi.h b/libmaple/spi.h index 742c1d0..d1973c5 100644 --- a/libmaple/spi.h +++ b/libmaple/spi.h @@ -1,4 +1,4 @@ -/* ***************************************************************************** +/****************************************************************************** * The MIT License * * Copyright (c) 2010 Perry Hung. @@ -20,10 +20,11 @@ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. - * ****************************************************************************/ + *****************************************************************************/ /** - * @brief libmaple serial peripheral interface (SPI) prototypes and declarations + * @brief libmaple serial peripheral interface (SPI) prototypes and + * declarations */ #ifndef _SPI_H_ @@ -61,36 +62,36 @@ extern "C" { #define SR_BSY BIT(7) // busy flag typedef struct SPI { - __io uint16 CR1; - uint16 pad0; - __io uint8 CR2; - uint8 pad1[3]; - __io uint8 SR; - uint8 pad2[3]; - __io uint16 DR; - uint16 pad3; - __io uint16 CRCPR; - uint16 pad4; - __io uint16 RXCRCR; - uint16 pad5; - __io uint16 TXCRCR; - uint16 pad6; + __io uint16 CR1; + uint16 pad0; + __io uint8 CR2; + uint8 pad1[3]; + __io uint8 SR; + uint8 pad2[3]; + __io uint16 DR; + uint16 pad3; + __io uint16 CRCPR; + uint16 pad4; + __io uint16 RXCRCR; + uint16 pad5; + __io uint16 TXCRCR; + uint16 pad6; } SPI; enum { - SPI_MSBFIRST = 0, - SPI_LSBFIRST = BIT(7), + SPI_MSBFIRST = 0, + SPI_LSBFIRST = BIT(7), }; enum { - SPI_PRESCALE_2 = (0x0 << 3), - SPI_PRESCALE_4 = (0x1 << 3), - SPI_PRESCALE_8 = (0x2 << 3), - SPI_PRESCALE_16 = (0x3 << 3), - SPI_PRESCALE_32 = (0x4 << 3), - SPI_PRESCALE_64 = (0x5 << 3), - SPI_PRESCALE_128 = (0x6 << 3), - SPI_PRESCALE_256 = (0x7 << 3) + SPI_PRESCALE_2 = (0x0 << 3), + SPI_PRESCALE_4 = (0x1 << 3), + SPI_PRESCALE_8 = (0x2 << 3), + SPI_PRESCALE_16 = (0x3 << 3), + SPI_PRESCALE_32 = (0x4 << 3), + SPI_PRESCALE_64 = (0x5 << 3), + SPI_PRESCALE_128 = (0x6 << 3), + SPI_PRESCALE_256 = (0x7 << 3) }; void spi_init(uint32 spi_num, @@ -101,12 +102,12 @@ uint8 spi_tx_byte(uint32 spi_num, uint8 data); uint8 spi_tx(uint32 spi_num, uint8 *buf, uint32 len); static inline uint8 spi_rx(uint32 spi_num) { - SPI *spi; + SPI *spi; - ASSERT(spi_num == 1 || spi_num == 2); - spi = (spi_num == 1) ? (SPI*)SPI1_BASE : (SPI*)SPI2_BASE; + ASSERT(spi_num == 1 || spi_num == 2); + spi = (spi_num == 1) ? (SPI*)SPI1_BASE : (SPI*)SPI2_BASE; - return spi->DR; + return spi->DR; } #ifdef __cplusplus |