请教关于i2c读16位数据（2个字节）相关问题

专家你好

        最近调试I2C接口，目前测试读EPROM数据没有什么问题，可以正常读写。现在手上有一个模块，接口是I2C，但是它的数据不像EPROM是8位的数据，该模块是16位的数据形式，请问怎么修改代码，谢谢！

Uint16 I2CA_ReadData(struct I2CMSG *msg)
{
// Wait until the STP bit is cleared from any previous master communication.
// Clearing of this bit by the module is delayed until after the SCD bit is
// set. If this bit is not checked prior to initiating a new message, the
// I2C could get confused.
if (I2caRegs.I2CMDR.bit.STP == 1)
{
return I2C_STP_NOT_READY_ERROR;
}

I2caRegs.I2CSAR = msg->SlaveAddress;

if(msg->MsgStatus == I2C_MSGSTAT_SEND_NOSTOP)
{
// Check if bus busy
if (I2caRegs.I2CSTR.bit.BB == 1)
{
return I2C_BUS_BUSY_ERROR;
}
I2caRegs.I2CCNT = 2;
I2caRegs.I2CDXR = msg->MemoryHighAddr;
I2caRegs.I2CDXR = msg->MemoryLowAddr;
I2caRegs.I2CMDR.all = 0x2620; // Send data to setup EEPROM address
}
else if(msg->MsgStatus == I2C_MSGSTAT_RESTART)
{
I2caRegs.I2CCNT = msg->NumOfBytes; // Setup how many bytes to expect
I2caRegs.I2CMDR.all = 0x2C20; // Send restart as master receiver
}
return I2C_SUCCESS;
}

中断函数如下：

interrupt void I2CINT1A_ISR(void) // I2C-A
{
// Insert ISR Code here
Uint16 IntSource, i;

// Read interrupt source
IntSource = I2caRegs.I2CISRC.all;

// Interrupt source = stop condition detected
if(IntSource == I2C_SCD_ISRC)
{
// If completed message was writing data, reset msg to inactive state
if (CurrentMsgPtr->MsgStatus == I2C_MSGSTAT_WRITE_BUSY)
{
CurrentMsgPtr->MsgStatus = I2C_MSGSTAT_INACTIVE;
}
else
{
if(CurrentMsgPtr->MsgStatus == I2C_MSGSTAT_SEND_NOSTOP_BUSY)
{
CurrentMsgPtr->MsgStatus = I2C_MSGSTAT_SEND_NOSTOP;
}
// If completed message was reading EEPROM data, reset msg to inactive state
// and read data from FIFO.
else if (CurrentMsgPtr->MsgStatus == I2C_MSGSTAT_READ_BUSY)
{
CurrentMsgPtr->MsgStatus = I2C_MSGSTAT_INACTIVE;
for(i=0; i < CurrentMsgPtr->NumOfBytes; i++)
{
CurrentMsgPtr->MsgBuffer[i] = I2caRegs.I2CDRR;
}
}
}
} // end of stop condition detected
else if(IntSource == I2C_ARDY_ISRC)
{
if(I2caRegs.I2CSTR.bit.NACK == 1)
{
I2caRegs.I2CMDR.bit.STP = 1;
I2caRegs.I2CSTR.all = I2C_CLR_NACK_BIT;
}
else if(CurrentMsgPtr->MsgStatus == I2C_MSGSTAT_SEND_NOSTOP_BUSY)
{
CurrentMsgPtr->MsgStatus = I2C_MSGSTAT_RESTART;
}
} // end of register access ready
// Enable future I2C (PIE Group 8) interrupts
PieCtrlRegs.PIEACK.all = PIEACK_GROUP8;
// To receive more interrupts from this PIE group, acknowledge this interrupt
// PieCtrlRegs.PIEACK.all = PIEACK_GROUP8;

}