求助28335的I2c发送2为从地址的发送方法

详细说明下，我用的一块28335的开发板，然后上面的I2c器件挂的是24c01，然后我自己换了个24c64上去，想直接驱动这个24c64，然后我看了原例程的24c01发送从地址寄存器的时候只发了一个0x01,然后写，读都没问题。我换的24c64数据手册写的是发送2个地址，一个高一个低，原来的24c01程序是这么写的

Uint16 WriteData(Uint16 *Wdata, Uint16 RomAddress, Uint16 number)
{
Uint16 i;
if (I2caRegs.I2CSTR.bit.BB == 1)
{
return I2C_BUS_BUSY_ERROR;
}
while(!I2C_xrdy());
I2caRegs.I2CSAR = 0x50;
I2caRegs.I2CCNT = number + 1;
I2caRegs.I2CDXR = RomAddress;
I2caRegs.I2CMDR.all = 0x6E20;
for (i=0; i<number; i++)
{
while(!I2C_xrdy());
I2caRegs.I2CDXR = *Wdata;
Wdata++;
if (I2caRegs.I2CSTR.bit.NACK == 1)
return I2C_BUS_BUSY_ERROR;
}
return I2C_SUCCESS;
}

Uint16 ReadData(Uint16 *RamAddr, Uint16 RomAddress, Uint16 number)
{
Uint16 i,Temp;

if (I2caRegs.I2CSTR.bit.BB == 1)
{
return I2C_BUS_BUSY_ERROR;
}
while(!I2C_xrdy());
I2caRegs.I2CSAR = 0x50;
I2caRegs.I2CCNT = 1;
I2caRegs.I2CDXR = RomAddress;
I2caRegs.I2CMDR.all = 0x6620;
if (I2caRegs.I2CSTR.bit.NACK == 1)
return I2C_BUS_BUSY_ERROR;
DELAY_US(50);
while(!I2C_xrdy());
I2caRegs.I2CSAR = 0x50;
I2caRegs.I2CCNT = number;
I2caRegs.I2CMDR.all = 0x6C20;
if (I2caRegs.I2CSTR.bit.NACK == 1)
return I2C_BUS_BUSY_ERROR;
for(i=0;i<number;i++)
{
while(!I2C_rrdy());
Temp = I2caRegs.I2CDRR;
if (I2caRegs.I2CSTR.bit.NACK == 1)
return I2C_BUS_BUSY_ERROR;
*RamAddr = Temp;
RamAddr++;
}
return I2C_SUCCESS;
}

然后我根据24c64更改了下

Uint16 WriteData(Uint16 *Wdata, Uint16 RomAddress, Uint16 RomAddress2, Uint16 number)
{
Uint16 i;
if (I2caRegs.I2CSTR.bit.BB == 1)
{
return I2C_BUS_BUSY_ERROR;
}
while(!I2C_xrdy());
I2caRegs.I2CSAR = 0x50;
I2caRegs.I2CCNT = number + 1;
I2caRegs.I2CDXR = RomAddress;
// DELAY_US(50);
I2caRegs.I2CDXR = RomAddress2;//更改处
I2caRegs.I2CMDR.all = 0x6E20;
for (i=0; i<number; i++)
{
while(!I2C_xrdy());
I2caRegs.I2CDXR = *Wdata;
Wdata++;
if (I2caRegs.I2CSTR.bit.NACK == 1)
return I2C_BUS_BUSY_ERROR;
}
return I2C_SUCCESS;
}

Uint16 ReadData(Uint16 *RamAddr, Uint16 RomAddress, Uint16 RomAddress2, Uint16 number)
{
Uint16 i,Temp;

if (I2caRegs.I2CSTR.bit.BB == 1)
{
return I2C_BUS_BUSY_ERROR;
}
while(!I2C_xrdy());
I2caRegs.I2CSAR = 0x50;
I2caRegs.I2CCNT = 1;
I2caRegs.I2CDXR = RomAddress;
// DELAY_US(50);
I2caRegs.I2CDXR = RomAddress2;////更改处
I2caRegs.I2CMDR.all = 0x6620;
if (I2caRegs.I2CSTR.bit.NACK == 1)
return I2C_BUS_BUSY_ERROR;
DELAY_US(50);
while(!I2C_xrdy());
I2caRegs.I2CSAR = 0x50;
I2caRegs.I2CCNT = number;
I2caRegs.I2CMDR.all = 0x6C20;
if (I2caRegs.I2CSTR.bit.NACK == 1)
return I2C_BUS_BUSY_ERROR;
for(i=0;i<number;i++)
{
while(!I2C_rrdy());
Temp = I2caRegs.I2CDRR;
if (I2caRegs.I2CSTR.bit.NACK == 1)
return I2C_BUS_BUSY_ERROR;
*RamAddr = Temp;
RamAddr++;
}
return I2C_SUCCESS;
}

其实也就是在写了一次I2CSAR后在写一次而已，然后编译下载也没问题，最后我写了数据，但是读出来一直是255，不管写什么都是255，我就不知道是没写对，还是没读对，还是读写都没对。。反正我初始定义一个数组全是0，然后把读的数放进去，都是255了。。其实我这么写也是无奈之举，毕竟24c60发2个字节地址的时候中间有个ack的。然后我又不想操作io口来模拟，想问下各位有什么办法写2个字节的地址没有。。肯定有人曾经写过的，，