diff options
Diffstat (limited to 'nuttx/arch/arm/src/lm3s/lm3s_internal.h')
| -rw-r--r-- | nuttx/arch/arm/src/lm3s/lm3s_internal.h | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/nuttx/arch/arm/src/lm3s/lm3s_internal.h b/nuttx/arch/arm/src/lm3s/lm3s_internal.h index 38a079743..43bcf2d6f 100644 --- a/nuttx/arch/arm/src/lm3s/lm3s_internal.h +++ b/nuttx/arch/arm/src/lm3s/lm3s_internal.h @@ -474,9 +474,10 @@ EXTERN int lm3s_ethinitialize(int intf); #endif /**************************************************************************** - * The external functions, lm3s_spiselect and lm3s_spistatus must be provided - * by board-specific logic. The are implementations of the select and status - * methods SPI interface defined by struct spi_ops_s (see include/nuttx/spi.h). + * The external functions, lm3s_spiselect, lm3s_spistatus, and + * lm3s_spicmddata must be provided by board-specific logic. These are + * implementations of the select, status, and cmddaa methods of the SPI + * interface defined by struct spi_ops_s (see include/nuttx/spi.h). * All other methods (including up_spiinitialize()) are provided by common * logic. To use this common SPI logic on your board: * @@ -485,9 +486,13 @@ EXTERN int lm3s_ethinitialize(int intf); * 2. Provide lm3s_spiselect() and lm3s_spistatus() functions in your * board-specific logic. These functions will perform chip selection and * status operations using GPIOs in the way your board is configured. - * 3. Add a call to up_spiinitialize() in your low level application + * 3. If CONFIG_SPI_CMDDATA is defined in your NuttX configuration, provide + * the lm3s_spicmddata() function in your board-specific logic. This + * functions will perform cmd/data selection operations using GPIOs in + * the way your board is configured. + * 4. Add a call to up_spiinitialize() in your low level application * initialization logic - * 4. The handle returned by up_spiinitialize() may then be used to bind the + * 5. The handle returned by up_spiinitialize() may then be used to bind the * SPI driver to higher level logic (e.g., calling * mmcsd_spislotinitialize(), for example, will bind the SPI driver to * the SPI MMC/SD driver). @@ -498,6 +503,9 @@ struct spi_dev_s; enum spi_dev_e; EXTERN void lm3s_spiselect(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool selected); EXTERN uint8_t lm3s_spistatus(FAR struct spi_dev_s *dev, enum spi_dev_e devid); +#ifdef CONFIG_SPI_CMDDATA +EXTERN int lm3s_spicmddata(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool cmd); +#endif #undef EXTERN #if defined(__cplusplus) |