基于HITECHC的PIC12C508读写93LC4源程序

/************************************************************ * Processer : Microchip PIC12C508 ** Compiler : Hi-TECH PICC 8.00 PL2 ** Writer : Jason Kuo ** Description : It can read/write 93LC46 (64 x 16-bit organization) **************************************************************/ 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;

本文引用地址： 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 (17)#define GPPU (16)#define T0CS (15)#define T0SE (14)#define PSA (13)#define PS2 (12)#define PS1 (11)#define PS0 (10)

/* OSCCAL bits */static volatile bit CAL3 @ (unsigned)OSCCAL*8+7;static volatile bit CAL2 @ (unsigned)OSCCAL*8+6;static volatile bit CAL1 @ (unsigned)OSCCAL*8+5;static volatile bit CAL0 @ (unsigned)OSCCAL*8+4;

static volatile bit GP5 @ (unsigned)GPIO*8+5;static volatile bit GP4 @ (unsigned)GPIO*8+4;static volatile bit GP3 @ (unsigned)GPIO*8+3;static volatile bit GP2 @ (unsigned)GPIO*8+2;static volatile bit GP1 @ (unsigned)GPIO*8+1;static volatile bit GP0 @ (unsigned)GPIO*8+0;

#define CONFIG_ADDR 0xFFF

/* code protection */#define MCLREN 0xFFFF // memory clear enable#define MCLRDIS 0xFFEF // memory clear disable

/*watchdog*/#define WDTEN 0xFFFF // watchdog timer enable#define WDTDIS 0xFFFB // watchdog timer disable

/* code protection */#define PROTECT 0xFFF7 // protect the program code#define UNPROTECT 0xFFFF // do not protect the program code

/*osc configurations*/#define EXTRC 0xFFFF // external resistor/capacitor#define INTRC 0xFFFE // internal#define XT 0xFFFD // crystal/resonator#define LP 0xFFFC // low power crystal/resonator

/* 93LC46 I/O pin define */#define CS GP0 //Chip Select#define CLK GP1 //Serial Data Clock#define DI GP2 //Serial Data Input#define DO GP4 //Serial Data Output

void Delay(unsigned int counter);void Pulse(void);void StartBit(void);void EWEN(void);void EWDS(void);extern void Write93LC46(unsigned char Offset_Addr, unsigned int tx_data); extern unsigned int Read93LC46(unsigned char Offset_Addr);void InitPIC(void);

#define CLRWDT() asm( clrwdt)#define SLEEP() asm( sleep)

#define ___mkstr1(x) #x#define ___mkstr(x) ___mkstr1(x)#define __CONFIG(x) asm(tpsect config,class=CONFIG,delta=2); asm(tglobaltconfig_word); asm(config_word); asm(tdw ___mkstr(x))

#define __IDLOC(w) asm(tpsect idloc,class=IDLOC,delta=2); asm(tglobaltidloc_word); asm(idloc_word); asm(tirpct__arg, ___mkstr(w)); asm(tdw 0__argh); asm(tendm)

__CONFIG(MCLRDIS WDTDIS EXTRC PROTECT);

/*---------------------------------------------------- Function : Delay Input : unsigned int (counter) Output : None Description : Delay routine if counter=1 delay 35us , if counter=10 delay 134us, if counter=100 delay 1.12ms,These delay is base on internal 4MHz ------------------------------------------------------*/ void Delay(unsigned int counter){ while(counter>0) counter--; }

/*---------------------------------------------------- Function : Pulse Input : None Output : None Description : Send a pulse (10) to Serial Data Clock(CLK) ------------------------------------------------------*/ void Pulse(void){ CLK = 1; Delay(25); CLK = 0;}

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