使用PIC12C508读写93LC4的HI-TECH C代码
用HI-TECH C写的使用PIC12C508读写93LC46范例程式
/************************************************************
* 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;
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 (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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