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/************************************************************************************
* arch/arm/src/stm32/stm32_spi.h
*
* Copyright (C) 2009 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
************************************************************************************/
#ifndef __ARCH_ARM_STC_STM32_STM32_SPI_H
#define __ARCH_ARM_STC_STM32_STM32_SPI_H
/************************************************************************************
* Included Files
************************************************************************************/
#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
************************************************************************************/
/************************************************************************************
* Public Data
************************************************************************************/
#ifndef __ASSEMBLY__
#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C" {
#else
#define EXTERN extern
#endif
/************************************************************************************
* Public Functions
************************************************************************************/
#undef EXTERN
#if defined(__cplusplus)
}
#endif
#endif /* __ASSEMBLY__ */
#endif /* __ARCH_ARM_STC_STM32_STM32_SPI_H */
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