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- UID
- 800393
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求助各位大大.....我的IIC始終不能作動下面是我的程序設定
我的MC9S08DZ16蕊片時脈是20MHZ 我用的EEPROM是AT24C02B請各位大大幫幫忙!!
#include <hidef.h> /* for EnableInterrupts macro */
#include "derivative.h" /* include peripheral declarations */
#define W_EEPROM_ADDR 0xA0;
#define R_EEPROM_ADDR 0xA1;
void IICdelay(void);
void outputdelay(void);
void IICInit(void);
void writeEEPROM(unsigned char caddr_data,unsigned char data);
unsigned char ReadEEPROM(unsigned char caddr);
unsigned char i=0;
unsigned char Databuff[8];
void MCG_Init(void);
void main(void) {
MCG_Init();
SOPT1_IICPS=1;
IICInit();
PTADD=0xFF;
EnableInterrupts; /* enable interrupts */
/* include your code here */
writeEEPROM(0x01,0x01);
IICdelay();
writeEEPROM(0x02,0x02);
IICdelay();
writeEEPROM(0x03,0x04);
IICdelay();
writeEEPROM(0x04,0x08);
IICdelay();
writeEEPROM(0x05,0x10);
IICdelay();
writeEEPROM(0x06,0x20);
IICdelay();
writeEEPROM(0x07,0x40);
IICdelay();
writeEEPROM(0x08,0x80);
IICdelay();
Databuff[0]=ReadEEPROM(0x01);
Databuff[1]=ReadEEPROM(0x02);
Databuff[2]=ReadEEPROM(0x03);
Databuff[3]=ReadEEPROM(0x04);
Databuff[4]=ReadEEPROM(0x05);
Databuff[5]=ReadEEPROM(0x06);
Databuff[6]=ReadEEPROM(0x07);
Databuff[7]=ReadEEPROM(0x08);
for(;;) {
//__RESET_WATCHDOG(); /* feeds the dog */
for(i=0;i<8;i++) {
PTAD=Databuff[i];
outputdelay();
outputdelay();
}
} /* loop forever */
/* please make sure that you never leave main */
}
void IICdelay(void) {
unsigned int i=200;
while(i--) {
}
}
void outputdelay(void) {
unsigned int j=0;
for(j=0;j<0x6000;j++){
}
}
void IICInit(void) {
IICC1_IICEN=1;
IICC1_TXAK=1;
IICC1_MST=0;
IICF=0x4B;
IICS_SRW=0;
}
void writeEEPROM(unsigned char caddr_data,unsigned char data) {
IICC1_TXAK=0;
IICC1|=0x30;
IICD=0xA0;
while(!IICS_IICIF);
IICS_IICIF=1;
while(IICS_RXAK);
IICD=caddr_data;
while(!IICS_IICIF);
IICS_IICIF=1;
while(IICS_RXAK);
IICD=data;
while(!IICS_IICIF);
IICS_IICIF=1;
while(IICS_RXAK);
IICS_IICIF=1;
IICC1_MST=0;
}
unsigned char ReadEEPROM(unsigned char caddr) {
unsigned char cdata;
IICC1_TXAK=0;
IICC1|=0x30;
IICD=0xA0;
while(!IICS_IICIF);
IICS_IICIF=1;
while(IICS_RXAK);
IICD=caddr;
while(!IICS_IICIF);
IICS_IICIF=1;
while(IICS_RXAK);
IICC1_RSTA=0;
IICD=0xA1;
while(!IICS_IICIF);
IICS_IICIF=1;
while(IICS_RXAK);
IICC1_TX=0;
IICC1_TXAK=1;
cdata=IICD;
while(!IICS_IICIF);
IICS_IICIF=1;
IICC1_MST=0;
cdata=IICD;
return cdata;
}
void MCG_Init(void) {
// if (ExtClkFlg == 1) { /* If using a 4 MHz crystal */
if (SRS_LOC == 0) { /* If no loss of clock has occurred, enter PEE to generate 16 MHz bus */
/* FEI -> FBE Mode */
MCGC2 = 0x36; /* BDIV by 1, xtal freq RANGE high, High GAIN, EREFS set */
MCGC1 = 0xB8; /* RDIV by 128 down to 31.25 kHz for FLL, Switch to ext. ref */
while (MCGSC_IREFST); /* Check internal ref. no longer on */
MCGC3 = 0xA0; /* LOL interrupt, LOC reset (CME) enabled (ONLY after IREFS = 0) */
while (!MCGSC_OSCINIT); /* Wait until crystal initializes */
while (MCGSC_CLKST != 0b10);/* Check external ref. switched */
/* FBE -> PBE */
MCGC3 = 0xE2; /* Set PLLS bit with VDIV mult by 32 */
MCGC1 = 0x90; /* RDIV by 4 (4 MHz/4 = 1 MHz for PLL) */
while (!MCGSC_PLLST);
while (!MCGSC_LOCK);
/* PBE -> PEE */
MCGC1 = 0x10; /* CLKS changed to [0:0] - PLL output = 32 MHz clock, 16 MHz bus */
while (MCGSC_CLKST != 0b11);
}
} |
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