OMAP L138 I2C程序读写问题

sum liu

我的程序如下：

unsigned int test = 0;

dataToSlave[0] = 0x55;

dataToSlave[1] = 0x11;

dataToSlave[3] = 0x56;

//管脚复用配置
I2CPinMuxSetup(0);
//复位模块
I2CMasterDisable(SOC_I2C_0_REGS);
//时钟配置Configure i2c bus speed to 100khz
I2CMasterInitExpClk(SOC_I2C_0_REGS, 24000000, 8000000, 100000);
//Set i2c slave address
I2CMasterSlaveAddrSet(SOC_I2C_0_REGS, I2C_SLAVE_ADDR);

I2CMasterEnable(SOC_I2C_0_REGS);
//写数据
I2CSetDataCount(SOC_I2C_0_REGS, 3);

I2CMasterControl(SOC_I2C_0_REGS, I2C_CFG_MST_TX | I2C_CFG_STOP);

I2CMasterIntEnableEx(SOC_I2C_0_REGS, I2C_INT_TRANSMIT_READY|I2C_INT_DATA_READY|I2C_INT_STOP_CONDITION);
// Generate start condition on i2c bus
I2CMasterStart(SOC_I2C_0_REGS);

while(!(I2CMasterIntStatus(SOC_I2C_0_REGS)&I2C_ICSTR_ICXRDY)){};

I2CMasterDataPut(SOC_I2C_0_REGS, dataToSlave[0]); //地址

while(!(I2CMasterIntStatus(SOC_I2C_0_REGS)&I2C_ICSTR_ICXRDY)){};

I2CMasterDataPut(SOC_I2C_0_REGS, dataToSlave[1]); //地址

while(!(I2CMasterIntStatus(SOC_I2C_0_REGS)&I2C_ICSTR_ICXRDY)){};

I2CMasterDataPut(SOC_I2C_0_REGS, dataToSlave[3]);//数据

I2CStatusClear(SOC_I2C_0_REGS, (I2C_CLEAR_DATA_READY | I2C_CLEAR_TRANSMIT_READY | I2C_CLEAR_STOP_CONDITION));

//读数据
while(I2CMasterBusBusy(SOC_I2C_0_REGS));

I2CMasterControl(SOC_I2C_0_REGS, I2C_CFG_MST_TX);

I2CMasterIntEnableEx(SOC_I2C_0_REGS, I2C_INT_TRANSMIT_READY|I2C_INT_DATA_READY);

I2CMasterStart(SOC_I2C_0_REGS);

while(!(I2CMasterIntStatus(SOC_I2C_0_REGS)&I2C_ICSTR_ICXRDY)){};

I2CMasterDataPut(SOC_I2C_0_REGS, dataToSlave[0]);

while(!(I2CMasterIntStatus(SOC_I2C_0_REGS)&I2C_ICSTR_ICXRDY)){};

I2CMasterDataPut(SOC_I2C_0_REGS, dataToSlave[1]);
//以上是写入要读取的地址

while(!(I2CMasterIntStatus(SOC_I2C_0_REGS)&I2C_ICSTR_ICXRDY)){};

I2CSetDataCount(SOC_I2C_0_REGS, 1);

I2CMasterControl(SOC_I2C_0_REGS, I2C_CFG_MST_RX | I2C_CFG_STOP);

I2CMasterIntEnableEx(SOC_I2C_0_REGS, I2C_INT_DATA_READY | I2C_INT_STOP_CONDITION );

I2CMasterStart(SOC_I2C_0_REGS);

while(!(I2CMasterIntStatus(SOC_I2C_0_REGS)&I2C_ICSTR_ICRRDY)){};

test = I2CMasterDataGet(SOC_I2C_0_REGS);

while(I2CMasterBusBusy(SOC_I2C_0_REGS));

////////////////////////////////////////////////////////

说明：我没有用中断的方式来读写数据。

我的I2C存储器的地址是17位的，所以我要分三次发，利用7位地址的这种协议发的

我的存储器的资料如下：