diff options
Diffstat (limited to 'nuttx/arch/arm/src/stm32/stm32_spi.h')
| -rwxr-xr-x | nuttx/arch/arm/src/stm32/stm32_spi.h | 145 |
1 files changed, 46 insertions, 99 deletions
diff --git a/nuttx/arch/arm/src/stm32/stm32_spi.h b/nuttx/arch/arm/src/stm32/stm32_spi.h index 4ff4f1c42..7a58dd83e 100755 --- a/nuttx/arch/arm/src/stm32/stm32_spi.h +++ b/nuttx/arch/arm/src/stm32/stm32_spi.h @@ -43,104 +43,7 @@ #include <nuttx/config.h> #include "chip.h" - -/************************************************************************************ - * Pre-processor Definitions - ************************************************************************************/ - -#define STM32_SPI_CLK_MAX 18000000UL /* Maximum allowed speed as per specifications for all SPIs */ - -/* Register Offsets *****************************************************************/ - -#define STM32_SPI_CR1_OFFSET 0x0000 /* SPI Control Register 1 (16-bit) */ -#define STM32_SPI_CR2_OFFSET 0x0004 /* SPI control register 2 (16-bit) */ -#define STM32_SPI_SR_OFFSET 0x0008 /* SPI status register (16-bit) */ -#define STM32_SPI_DR_OFFSET 0x000c /* SPI data register (16-bit) */ -#define STM32_SPI_CRCPR_OFFSET 0x0010 /* SPI CRC polynomial register (16-bit) */ -#define STM32_SPI_RXCRCR_OFFSET 0x0014 /* SPI Rx CRC register (16-bit) */ -#define STM32_SPI_TXCRCR_OFFSET 0x0018 /* SPI Tx CRC register (16-bit) */ - -/* Register Addresses ***************************************************************/ - -#if STM32_NSPI > 0 -# define STM32_SPI1_CR1 (STM32_SPI1_BASE+STM32_SPI_CR1_OFFSET) -# define STM32_SPI1_CR2 (STM32_SPI1_BASE+STM32_SPI_CR2_OFFSET) -# define STM32_SPI1_SR (STM32_SPI1_BASE+STM32_SPI_SR_OFFSET) -# define STM32_SPI1_DR (STM32_SPI1_BASE+STM32_SPI_DR_OFFSET) -# define STM32_SPI1_CRCPR (STM32_SPI1_BASE+STM32_SPI_CRCPR_OFFSET) -# define STM32_SPI1_RXCRCR (STM32_SPI1_BASE+STM32_SPI_RXCRCR_OFFSET) -# define STM32_SPI1_TXCRCR (STM32_SPI1_BASE+STM32_SPI_TXCRCR_OFFSET) -#endif - -#if STM32_NSPI > 1 -# define STM32_SPI2_CR1 (STM32_SPI2_BASE+STM32_SPI_CR1_OFFSET) -# define STM32_SPI2_CR2 (STM32_SPI2_BASE+STM32_SPI_CR2_OFFSET) -# define STM32_SPI2_SR (STM32_SPI2_BASE+STM32_SPI_SR_OFFSET) -# define STM32_SPI2_DR (STM32_SPI2_BASE+STM32_SPI_DR_OFFSET) -# define STM32_SPI2_CRCPR (STM32_SPI2_BASE+STM32_SPI_CRCPR_OFFSET) -# define STM32_SPI2_RXCRCR (STM32_SPI2_BASE+STM32_SPI_RXCRCR_OFFSET) -# define STM32_SPI2_TXCRCR (STM32_SPI2_BASE+STM32_SPI_TXCRCR_OFFSET) -#endif - -#if STM32_NSPI > 2 -# define STM32_SPI3_CR1 (STM32_SPI3_BASE+STM32_SPI_CR1_OFFSET) -# define STM32_SPI3_CR2 (STM32_SPI3_BASE+STM32_SPI_CR2_OFFSET) -# define STM32_SPI3_SR (STM32_SPI3_BASE+STM32_SPI_SR_OFFSET) -# define STM32_SPI3_DR (STM32_SPI3_BASE+STM32_SPI_DR_OFFSET) -# define STM32_SPI3_CRCPR (STM32_SPI3_BASE+STM32_SPI_CRCPR_OFFSET) -# define STM32_SPI3_RXCRCR (STM32_SPI3_BASE+STM32_SPI_RXCRCR_OFFSET) -# define STM32_SPI3_TXCRCR (STM32_SPI3_BASE+STM32_SPI_TXCRCR_OFFSET) -#endif - -/* Register Bitfield Definitions ****************************************************/ - -/* SPI Control Register 1 */ - -#define SPI_CR1_CPHA (1 << 0) /* Bit 0: Clock Phase */ -#define SPI_CR1_CPOL (1 << 1) /* Bit 1: Clock Polarity */ -#define SPI_CR1_MSTR (1 << 2) /* Bit 2: Master Selection */ -#define SPI_CR1_BR_SHIFT (3) /* Bits 5:3 Baud Rate Control */ -#define SPI_CR1_BR_MASK (7 << SPI_CR1_BR_SHIFT) -# define SPI_CR1_FPCLCKd2 (0 << SPI_CR1_BR_SHIFT) /* 000: fPCLK/2 */ -# define SPI_CR1_FPCLCKd4 (1 << SPI_CR1_BR_SHIFT) /* 001: fPCLK/4 */ -# define SPI_CR1_FPCLCKd8 (2 << SPI_CR1_BR_SHIFT) /* 010: fPCLK/8 */ -# define SPI_CR1_FPCLCKd16 (3 << SPI_CR1_BR_SHIFT) /* 011: fPCLK/16 */ -# define SPI_CR1_FPCLCKd32 (4 << SPI_CR1_BR_SHIFT) /* 100: fPCLK/32 */ -# define SPI_CR1_FPCLCKd64 (5 << SPI_CR1_BR_SHIFT) /* 101: fPCLK/64 */ -# define SPI_CR1_FPCLCKd128 (6 << SPI_CR1_BR_SHIFT) /* 110: fPCLK/128 */ -# define SPI_CR1_FPCLCKd256 (7 << SPI_CR1_BR_SHIFT) /* 111: fPCLK/256 */ -#define SPI_CR1_SPE (1 << 6) /* Bit 6: SPI Enable */ -#define SPI_CR1_LSBFIRST (1 << 7) /* Bit 7: Frame Format */ -#define SPI_CR1_SSI (1 << 8) /* Bit 8: Internal slave select */ -#define SPI_CR1_SSM (1 << 9) /* Bit 9: Software slave management */ -#define SPI_CR1_RXONLY (1 << 10) /* Bit 10: Receive only */ -#define SPI_CR1_DFF (1 << 11) /* Bit 11: Data Frame Format */ -#define SPI_CR1_CRCNEXT (1 << 12) /* Bit 12: Transmit CRC next */ -#define SPI_CR1_CRCEN (1 << 13) /* Bit 13: Hardware CRC calculation enable */ -#define SPI_CR1_BIDIOE (1 << 14) /* Bit 14: Output enable in bidirectional mode */ -#define SPI_CR1_BIDIMODE (1 << 15) /* Bit 15: Bidirectional data mode enable */ - -/* SPI Control Register 2 */ - -#define SPI_CR2_RXDMAEN (1 << 0) /* Bit 0: Rx Buffer DMA Enable */ -#define SPI_CR2_TXDMAEN (1 << 1) /* Bit 1: Tx Buffer DMA Enable */ -#define SPI_CR2_SSOE (1 << 2) /* Bit 2: SS Output Enable */ -#define SPI_CR2_ERRIE (1 << 5) /* Bit 5: Error interrupt enable */ -#define SPI_CR2_RXNEIE (1 << 6) /* Bit 6: RX buffer not empty interrupt enable */ -#define SPI_CR2_TXEIE (1 << 7) /* Bit 7: Tx buffer empty interrupt enable */ - -/* SPI status register */ - -#define SPI_SR_RXNE (1 << 0) /* Bit 0: Receive buffer not empty */ -#define SPI_SR_TXE (1 << 1) /* Bit 1: Transmit buffer empty */ -#define SPI_SR_CRCERR (1 << 4) /* Bit 4: CRC error flag */ -#define SPI_SR_MODF (1 << 5) /* Bit 5: Mode fault */ -#define SPI_SR_OVR (1 << 6) /* Bit 6: Overrun flag */ -#define SPI_SR_BSY (1 << 7) /* Bit 7: Busy flag */ - -/************************************************************************************ - * Public Types - ************************************************************************************/ +#include "chip/stm32_spi.h" /************************************************************************************ * Public Data @@ -156,15 +59,59 @@ extern "C" { #define EXTERN extern #endif +struct spi_dev_s; +enum spi_dev_e; + /************************************************************************************ * Public Functions ************************************************************************************/ +/************************************************************************************ + * Name: stm32_spi1/2/3select and stm32_spi1/2/3status + * + * Description: + * The external functions, stm32_spi1/2/3select, stm32_spi1/2/3status, and + * stm32_spi1/2/3cmddata must be provided by board-specific logic. These are + * implementations of the select, status, and cmddata 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 STM32 logic. To use this + * common SPI logic on your board: + * + * 1. Provide logic in stm32_boardinitialize() to configure SPI chip select + * pins. + * 2. Provide stm32_spi1/2/3select() and stm32_spi1/2/3status() 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. If CONFIG_SPI_CMDDATA is defined in your NuttX configuration file, then + * provide stm32_spi1/2/3cmddata() functions in your board-specific logic. + * These functions will perform cmd/data selection operations using GPIOs in the + * way your board is configured. + * 4. Add a calls to up_spiinitialize() in your low level application + * initialization logic + * 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). + * + ************************************************************************************/ + +EXTERN void stm32_spi1select(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool selected); +EXTERN uint8_t stm32_spi1status(FAR struct spi_dev_s *dev, enum spi_dev_e devid); +EXTERN int stm32_spi1cmddata(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool cmd); + +EXTERN void stm32_spi2select(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool selected); +EXTERN uint8_t stm32_spi2status(FAR struct spi_dev_s *dev, enum spi_dev_e devid); +EXTERN int stm32_spi2cmddata(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool cmd); + +EXTERN void stm32_spi3select(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool selected); +EXTERN uint8_t stm32_spi3status(FAR struct spi_dev_s *dev, enum spi_dev_e devid); +EXTERN int stm32_spi3cmddata(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool cmd); + #undef EXTERN #if defined(__cplusplus) } #endif #endif /* __ASSEMBLY__ */ - #endif /* __ARCH_ARM_STC_STM32_STM32_SPI_H */ + |