[笔记].关于Nios II的数据类型的一点想法

鄙人觉得Nios II HAL自带的数据类型宏真的不好用，而且还有个alt_前缀，移植很麻烦。

代码1 alt_types.h

#ifndef __ALT_TYPES_H__
#define __ALT_TYPES_H__

/******************************************************************************
*                                                                             *
* License Agreement                                                           *
*                                                                             *
* Copyright (c) 2003 Altera Corporation, San Jose, California, USA.           *
* All rights reserved.                                                        *
*                                                                             *
******************************************************************************/

/* 
 * Don't declare these typedefs if this file is included by assembly source.
 */
#ifndef ALT_ASM_SRC
typedef signed char  alt_8;
typedef unsigned char  alt_u8;
typedef signed short alt_16;
typedef unsigned short alt_u16;
typedef signed long alt_32;
typedef unsigned long alt_u32;
typedef long long alt_64;
typedef unsigned long long alt_u64;
#endif

#define ALT_INLINE        __inline__
#define ALT_ALWAYS_INLINE __attribute__ ((always_inline))
#define ALT_WEAK          __attribute__((weak))

#endif /* __ALT_TYPES_H__ */

我习惯于使用STM32的数据类型宏，因为都是32位的RISC处理器，所以都是通用的，推荐大家也使用。哈哈，看起来都比较清爽。

代码2 my_types.h

// copy from stm32f10x_type.h

#ifndef MY_TYPES_H_
#define MY_TYPES_H_

typedef signed long  s32;
typedef signed short s16;
typedef signed char  s8;

typedef signed long  const sc32;  /* Read Only */
typedef signed short const sc16;  /* Read Only */
typedef signed char  const sc8;   /* Read Only */

typedef volatile signed long  vs32;
typedef volatile signed short vs16;
typedef volatile signed char  vs8;

typedef volatile signed long  const vsc32;  /* Read Only */
typedef volatile signed short const vsc16;  /* Read Only */
typedef volatile signed char  const vsc8;   /* Read Only */

typedef unsigned long  u32;
typedef unsigned short u16;
typedef unsigned char  u8;

typedef unsigned long  const uc32;  /* Read Only */
typedef unsigned short const uc16;  /* Read Only */
typedef unsigned char  const uc8;   /* Read Only */

typedef volatile unsigned long  vu32;
typedef volatile unsigned short vu16;
typedef volatile unsigned char  vu8;

typedef volatile unsigned long  const vuc32;  /* Read Only */
typedef volatile unsigned short const vuc16;  /* Read Only */
typedef volatile unsigned char  const vuc8;   /* Read Only */

typedef enum {FALSE = 0, TRUE = !FALSE} bool;

#endif /* MY_TYPES_H_ */

下面给个my_types.h的使用范例。

代码3 PIO寄存器结构体

#include "my_types.h"

// PIO Data structure
typedef struct
{
    vu32 DATA           : 32;
    vu32 DIRECTION      : 32;
    vu32 INTERRUPT_MASK : 32;
    vu32 EDGE_CAPTURE   : 32;

}PIO_T;