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问 请大家帮忙看看这个奇怪的问题：
我写的 I2C的双机通信的程序，但是 SWITCH语句就是执行不对：

当switch(0) 或 switch(1)时，程序确跑到case 4 去执行；
当switch(2)及其后时，程序才执行正确；

我用的 PIC16F877A 的片子， PICC8.05 的
C编译器，请大家帮忙看看

void sServiceI2c(void)
{
bI2cState=0;//////
switch(bI2cState)
{
case 0:
/*generate i2c bus start condition*/
bI2cState++;
/* Initiate START condition*/
SEN=1;
break;


case 1:
/*generate i2c address write (r/w=0)*/
bI2cState++;
SSPBUF=(bSlaveAddres<<1);
break;


case 2:
/*test acknowledge after address and data write*/
if((SSPCON2&&(1<{
MBitSet(fI2c,AckError);
bI2cState=0;
PEN=1; // Generate STOP condition
}
else
{
if(bWrCnt>=15)
{
bI2cState++;
}
SSPBUF=I2cTxBuff[bWrCnt];
bWrCnt++;
}
break;

case 3:
/*generate i2c bus stop condition*/
if((SSPCON2&&(1<{
bI2cState=0;
MBitSet(fI2c,AckError);
}
else
{
bI2cState++;
}
PEN=1;
break;

case 4:
/*generate i2c bus start condition*/
bI2cState++;
SEN=1;
break;

case 5:
/*generate i2c address write (r/w=1)*/
bI2cState++;
SSPBUF=(bSlaveAddres<<1);
break;

case 6:
/*test acknowledge after address write*/
if((SSPCON2&&(1<{
MBitSet(fI2c,AckError);
bI2cState=0;
PEN=1;
}
else
{
bI2cState++;
RCEN=1;
}
break;

case 7:
/*read slave i2c*/
if(bRdCnt>=16)
{ /*send not acknowledge*/
bI2cState++;
I2cRxBuff[bRdCnt]=SSPBUF;
ACKDT=1;
ACKEN=1;
}
else
{ /*send acknowledge*/
I2cRxBuff[bRdCnt]=SSPBUF;
bRdCnt++;
ACKDT=0;
ACKEN=1;
do
{
;
}
while((SSPCON2&&(1<RCEN=1;
SSPIF=0;
}
break;

case 8:
/*generate i2c stop condition */
bI2cState++;
SSPIE=0;
PEN=1;

bI2cState=0;
MBitClr(fI2c,RwDone);
break;

default:;
}
}
答 1: 到底哪里有错啊？难道大家没有碰到过吗？ 答 2: 大家帮帮忙啊大家帮帮忙啊


TKS