我以PIC1250.H的名称找到了该PIC单片机的头文件，但无法了解其中使用的某些语法。
该文件的来源是:
/*
* Header file for the Microchip
* PIC 12c508 chip
* PIC 12c509 chip
* Baseline Microcontrollers
*/
static volatile unsigned char RTCC @ 0x01;
static volatile unsigned char TMR0 @ 0x01;
static volatile unsigned char PCL @ 0x02;
static volatile unsigned char STATUS @ 0x03;
static unsigned char FSR @ 0x04;
static volatile unsigned char OSCCAL @ 0x05;
static volatile unsigned char GPIO @ 0x06;
static unsigned char control OPTION @ 0x00;
static volatile unsigned char control TRIS @ 0x06;
/* STATUS bits */
static bit GPWUF @ (unsigned)&STATUS*8+7;
static bit PA0 @ (unsigned)&STATUS*8+5;
static bit TO @ (unsigned)&STATUS*8+4;
static bit PD @ (unsigned)&STATUS*8+3;
static bit ZERO @ (unsigned)&STATUS*8+2;
static bit DC @ (unsigned)&STATUS*8+1;
static bit CARRY @ (unsigned)&STATUS*8+0;
/* OPTION bits */
#define GPWU (1<<7)
#define GPPU (1<<6)
#define T0CS (1<<5)
#define T0SE (1<<4)
#define PSA (1<<3)
#define PS2 (1<<2)
#define PS1 (1<<1)
#define PS0 (1<<0)
/* OSCCAL bits */
static bit CAL7 @ (unsigned)&OSCCAL*8+7;
static bit CAL6 @ (unsigned)&OSCCAL*8+6;
static bit CAL5 @ (unsigned)&OSCCAL*8+5;
static bit CAL4 @ (unsigned)&OSCCAL*8+4;
/* GPIO bits */
static bit GP5 @ (unsigned)&GPIO*8+5;
static bit GP4 @ (unsigned)&GPIO*8+4;
static bit GP3 @ (unsigned)&GPIO*8+3;
static bit GP2 @ (unsigned)&GPIO*8+2;
static bit GP1 @ (unsigned)&GPIO*8+1;
static bit GP0 @ (unsigned)&GPIO*8+0;
#define CONFIG_ADDR 0xFFF
#define FOSC0 0x01
#define FOSC1 0x02
#define WDTE 0x04
#define CP 0x08
#define MCLRE 0x0F
我无法理解整个modifer数据类型@声明内容。有人可以帮我吗？我只是这个新手。
最佳答案
这是一个编译器扩展。
从PIC MPLAB XC8编译器文档(重点是我的):
注意，MPLAB XC8并不是唯一具有相同@结构的编译器，该结构可以将对象放置在特定的存储器位置。
另一个众所周知的编译器是Freescale CodeWarrior(至少适用于HCS08)。
另一个是IAR C编译器(至少适用于MSP430和AVR)。
关于c - @登录C变量声明，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/15955856/