uint8 Write24C01(uint8 Addr,uint8 Data)
{
uint32 ii = 0x0;
uint32 test;
I20CONCLR = (1 << 2) | (1 << 3)| (1 << 5); // Çå³ýSTA,SI,AA±ê־λ
I20CONSET = (1 << 5) | (1 << 6); // ÖÃλSTA,Æô¶¯I2C×ÜÏß
// I20CONCLR = (1<<3) ;
// I20CONSET = (1<<5);
//--------------------------------------------------------------------------------
while ( ((I20STAT & 0xf8)!=0x08) && ((I20STAT & 0xf8)!=0x10) && (ii++<0xffff) ); //ÅжÏÓÐûÓз¢ËÍÆðʼÌõ¼þºÍÖظ´ÆðʼÌõ¼þ
I20DAT = (at24c01a_addr<<1); // ·¢Ë͵ØÖ·,ûÓÐ×ÓµØÖ·
I20CONCLR = 0x28 ; // 1<<5 ¹Ø±ÕÆô¶¯Î» ÎÊÌâµÄ¹Ø¼ü
//------------------------------------------------------------------------------------------
ii=0;
while ( ((I20STAT & 0xf8) != 0x18) && ((I20STAT & 0xf8)!=0x20) && (ii++<0xffff) );//ÅжϵØÖ·ÓÐûÓÐû½ÓÊÕ²¢·µ»ØACKλ
if((I20STAT & 0xf8)==0x18) // Ö±½ÓдÊý¾Ý
{
I20DAT = Addr;
I20CONCLR = 0x28;
}
else
{
I20CONCLR = 0x38;
I20CONSET = 1<<4;
return 0;
}
//--------------------------------------------------------------------------------------
ii=0;
while ( ((I20STAT & 0xf8)!=0x28) && ((I20STAT & 0xf8)!=0x30) && (ii++<0xffff) );//ÅжÏÊý¾ÝÓÐûÓз¢Ëͳɹ¦²¢·µ»ØACKλ
if(I20STAT==0x28)
{
I20DAT = Data;
I20CONCLR = 0x28;
}
else
{
I20CONCLR = 0x38;
I20CONSET = 1<<4;
return 0;
}
//A点
//-------------------------------------------------------------------
ii = 0;
while ( ((I21STAT & 0xf8) != 0x28) && ((I21STAT & 0xf8)!=0x30) && (ii++<0x0ffff) );
test = I21STAT;
if(test ==0x28 )
{
I21CONSET = (1<<4); // ֹͣI2C
I21CONCLR = (0x28); // ÇåÁã SI ºÍ STA
return 1;
}
else
{
I21CONSET = (1<<4); // ֹͣI2C
I21CONCLR = (0x28); // ÇåÁã SI ºÍ STA
return 0;
}
}
说明： 1、用LPC2366的I2C0口控制AT24C01A。
2、test用于测试
3、程序运行，居然发现test = 0xf8
4、A点之前测试都正常
5、AT24C01A器件地址 = x1010 000(2进制)
请教：有可能是什么原因？？
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