/******************************************************************************* * (c) Copyright 2011-2013 Microsemi SoC Products Group. All rights reserved. * * SmartFusion2 Cortex Microcontroller Software Interface - Peripheral * Access Layer. * * This file provides interfaces to perform register and register bit level * read / write operations. These interfaces support bit-banding in case of * Cortex-M3 CPU. * * SVN $Revision: 5263 $ * SVN $Date: 2013-03-21 14:44:58 +0000 (Thu, 21 Mar 2013) $ */ #ifndef HW_REG_IO_H_ #define HW_REG_IO_H_ #include <stdint.h> /* Include standard types */ #if defined ( __CC_ARM ) #define __INLINE __inline /*!< inline keyword for ARM Compiler */ #elif defined ( __ICCARM__ ) #define __INLINE inline /*!< inline keyword for IAR Compiler. Only avaiable in High optimization mode! */ #elif defined ( __GNUC__ ) #define __INLINE inline /*!< inline keyword for GNU Compiler */ #endif /***************************************************************************************** * Definitions for register access */ #define HW_REG(addr) (*((volatile uint32_t *) (addr))) static __INLINE void write_reg32(volatile uint32_t * reg, uint32_t val) { HW_REG(reg) = val; } static __INLINE void write_reg16(volatile uint16_t * reg, uint16_t val) { HW_REG(reg) = val; } static __INLINE void write_reg8(volatile uint8_t * reg, uint8_t val) { HW_REG(reg) = val; } static __INLINE uint32_t read_reg32(volatile uint32_t * reg) { return ( HW_REG(reg) ); } static __INLINE uint16_t read_reg16(volatile uint16_t * reg) { return ( HW_REG(reg) ); } static __INLINE uint8_t read_reg8(volatile uint8_t * reg) { return ( HW_REG(reg) ); } /***************************************************************************************** * Definitions for register bits access using bit-band aliases for Cortex-M3 */ #define BITBAND(addr,bitnum) (((uint32_t)addr & 0xF0000000)+0x02000000+(((uint32_t)addr & 0xFFFFF)<<5)+(bitnum<<2)) #define HW_REG_BIT(reg,bitnum) (*(volatile unsigned int *)((BITBAND(reg,bitnum)))) /***************************************************************************************** * Functions to set a bit field in Cortex-M3 */ static __INLINE void set_bit_reg32(volatile uint32_t * reg, uint8_t bit) { HW_REG_BIT(reg,bit) = 0x1; } static __INLINE void set_bit_reg16(volatile uint16_t * reg, uint8_t bit) { HW_REG_BIT(reg,bit) = 0x1; } static __INLINE void set_bit_reg8(volatile uint8_t * reg, uint8_t bit) { HW_REG_BIT(reg,bit) = 0x1; } /***************************************************************************************** * Functions to clear a bit field in Cortex-M3 */ static __INLINE void clear_bit_reg32(volatile uint32_t * reg, uint8_t bit) { HW_REG_BIT(reg,bit) = 0x0; } static __INLINE void clear_bit_reg16(volatile uint16_t * reg, uint8_t bit) { HW_REG_BIT(reg,bit) = 0x0; } static __INLINE void clear_bit_reg8(volatile uint8_t * reg, uint8_t bit) { HW_REG_BIT(reg,bit) = 0x0; } /***************************************************************************************** * Functions to read a bit field in Cortex-M3 */ static __INLINE uint8_t read_bit_reg32(volatile uint32_t * reg, uint8_t bit) { return (HW_REG_BIT(reg,bit)); } static __INLINE uint8_t read_bit_reg16(volatile uint16_t * reg, uint8_t bit) { return (HW_REG_BIT(reg,bit)); } static __INLINE uint8_t read_bit_reg8(volatile uint8_t * reg, uint8_t bit) { return (HW_REG_BIT(reg,bit)); } #endif /* HW_REG_IO_H_ */