rt-thread-official/bsp/smartfusion2/CMSIS/hw_reg_io.h

114 lines
3.5 KiB
C

/*******************************************************************************
* (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_ */