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问 我正在调试I2C模块，将i2c0配置成主、发送模式，现在的问题是可以发送起始位，当发送数据是，SCL没有输出，始终为低。我的时钟线与信号线都已经接了上拉电阻，请问这会是哪里出了问题？
配置程序如下
I2c_XmtCfg.i2coar=0x00000007;   /* I2COAR -   Must be used as slave */
I2c_XmtCfg.i2cimr=0x00000000; /* I2CIER -    Disable interrupts, use polling */
I2c_XmtCfg.i2cclkl=94; /* I2CCLKL -   Low period for 100KHz operation */
I2c_XmtCfg.i2cclkh=94; /* I2CCLKH -   High period for 100KHz operation */
I2c_XmtCfg.i2ccnt=0x00000001;/* I2CCNT -    Data words per transmission */
I2c_XmtCfg.i2csar=0x00000050; /* I2CSAR -    Slave address */
I2c_XmtCfg.i2cmdr=0x000026a0; /* I2CMDR -    Mode */
I2c_XmtCfg.i2cpsc=0x00000001;  /* I2CPSC -    Prescale 20MHz to 10MHz */                
    
I2cXmtHandle=I2C_open(I2C_PORT0,I2C_OPEN_RESET);／／打开端口
*(volatile unsigned int *)I2CMDR0&=~0x20;／／复位
*(volatile unsigned int *)I2CPSC0=0x00;／／分频
I2C_config(I2cXmtHandle,&I2c_XmtCfg);／／配置端口

while (I2C_bb(I2cXmtHandle))／／是否忙
{
    I2C_RSET(I2CSTR0,_I2C_I2CSTR_BB_MASK);
}

while(!I2C_xrdy(I2cXmtHandle));
I2C_start(I2cXmtHandle);／／有输出
while(!I2C_xrdy(I2cXmtHandle));            
I2C_writeByte(I2cXmtHandle,0xff);／／无输出

答 1: 有没有人指点一下?有没有人指点一下?