/************************************************************************************ * arch/arm/src/kinetis/kinetis_crc.h * * Copyright (C) 2011 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * 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_SRC_KINETIS_KINETIS_CRC_H #define __ARCH_ARM_SRC_KINETIS_KINETIS_CRC_H /************************************************************************************ * Included Files ************************************************************************************/ #include #include "chip.h" #if defined(KINETIS_NCRC) && KINETIS_NCRC > 0 /************************************************************************************ * Pre-processor Definitions ************************************************************************************/ /* Register Offsets *****************************************************************/ #define KINETIS_CRC_CRC_OFFSET 0x0000 /* CRC Data Register */ #define KINETIS_CRC_GPOLY_OFFSET 0x0004 /* CRC Polynomial Register */ #define KINETIS_CRC_CTRL_OFFSET 0x0008 /* CRC Control Register */ /* Register Addresses ***************************************************************/ #define KINETIS_CRC_CRC (KINETIS_CRC_BASE+KINETIS_CRC_CRC_OFFSET) #define KINETIS_CRC_GPOLY (KINETIS_CRC_BASE+KINETIS_CRC_GPOLY_OFFSET) #define KINETIS_CRC_CTRL (KINETIS_CRC_BASE+KINETIS_CRC_CTRL_OFFSET) /* Register Bit Definitions *********************************************************/ /* CRC Data Register (32-bit) */ #define CRC_CRC_LL_SHIFT (0) /* Bits 0-7: CRC Low Lower Byte */ #define CRC_CRC_LL_MASK (0xff << CRC_CRC_LL_SHIFT) #define CRC_CRC_LU_SHIFT (8) /* Bits 8-15: CRC Low Upper Byte */ #define CRC_CRC_LU_MASK (0xff << CRC_CRC_LU_SHIFT) #define CRC_CRC_HL_SHIFT (16) /* Bits 16-23: CRC High Lower Byte */ #define CRC_CRC_HL_MASK (0xff << CRC_CRC_HL_SHIFT) #define CRC_CRC_HU_SHIFT (24) /* Bits 24-31: CRC High Upper Byte */ #define CRC_CRC_HU_MASK (0xff << CRC_CRC_HU_SHIFT) /* CRC Polynomial Register */ #define CRC_GPOLY_LOW_SHIFT (0) /* Bits 0-15: Low polynominal half-word */ #define CRC_GPOLY_LOW_MASK (0xffff << CRC_GPOLY_LOW_SHIFT) #define CRC_GPOLY_HIGH_SHIFT (16) /* Bits 16-31: High polynominal half-word */ #define CRC_GPOLY_HIGH_MASK (0xffff << CRC_GPOLY_HIGH_SHIFT) /* CRC Control Register */ /* Bits 0-23: Reserved */ #define CRC_CTRL_TCRC (1 << 24) /* Bit 24: Width of CRC protocol */ #define CRC_CTRL_WAS (1 << 25) /* Bit 25: Write CRC data register as seed */ #define CRC_CTRL_FXOR (1 << 26) /* Bit 26: Complement Read of CRC data register */ /* Bit 27: Reserved */ #define CRC_CTRL_TOTR_SHIFT (28) /* Bits 28-29: Type of Transpose for Read */ #define CRC_CTRL_TOTR_MASK (3 << CRC_CTRL_TOTR_SHIFT) # define CRC_CTRL_TOTR_NONE (0 << CRC_CTRL_TOTR_SHIFT) /* No transposition */ # define CRC_CTRL_TOTR_BITS (1 << CRC_CTRL_TOTR_SHIFT) /* Bits transposed; bytes are not */ # define CRC_CTRL_TOTR_BOTH (2 << CRC_CTRL_TOTR_SHIFT) /* Both bits bytes and bytes transposed */ # define CRC_CTRL_TOTR_BYTES (3 << CRC_CTRL_TOTR_SHIFT) /* Bytes transposed; bits in byte are not */ #define CRC_CTRL_TOT_SHIFT (30) /* Bits 30-31: Type of Transpose for Writes */ #define CRC_CTRL_TOT_MASK (3 << CRC_CTRL_TOT_SHIFT) # define CRC_CTRL_TOT_NONE (0 << CRC_CTRL_TOT_SHIFT) /* No transposition */ # define CRC_CTRL_TOT_BITS (1 << CRC_CTRL_TOT_SHIFT) /* Bits transposed; bytes are not */ # define CRC_CTRL_TOT_BOTH (2 << CRC_CTRL_TOT_SHIFT) /* Both bits bytes and bytes transposed */ # define CRC_CTRL_TOT_BYTES (3 << CRC_CTRL_TOT_SHIFT) /* Bytes transposed; bits in byte are not */ /************************************************************************************ * Public Types ************************************************************************************/ /************************************************************************************ * Public Data ************************************************************************************/ /************************************************************************************ * Public Functions ************************************************************************************/ #endif /* KINETIS_NCRC && KINETIS_NCRC > 0 */ #endif /* __ARCH_ARM_SRC_KINETIS_KINETIS_CRC_H */