用过c8051f SMBUS读写eeprom的进来!
用c8051f120 的smbus读写24c16 能正常! 用的是官方的example但读写24c32时不行 个人认为应该是写地址的时候出错了因为24c32要写2个byte的地址 有没有哪位以前遇到过哦 2个byte的地址应该怎么写进去啊?? 急急。。。 好像记得是用的中断方式的,一直都不用他这个例程,查询的用得也很稳定 回复【1楼】qinshi1208-----------------------------------------------------------------------
确实是中断哈不过问题就是不知道是16位两个byte的地址是分两次中断写还是进一次中断就给写完了 要改写的 回复【3楼】Jigsaw
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知道怎么改不呢嘿嘿 //-----------------------------------------------------------------------------
// Functions Prototype
//-----------------------------------------------------------------------------
char EPROM_WriteBlock (unsigned char addr, unsigned char l, unsigned char *da)
{
unsigned char x;
unsigned int y;
//---------------------------------------------------------------
EEPwp = 0; // write on
for (x=0; x<l; x++) {
eep.chipAddr = 0xa0; // chip address
eep.addr1st = addr+x;
eep.dataLen = 1; // data len
eep.dataPtr = 0;
eep.dataArray = da+x; // data byte
eep.step = EEP_WRITE_INT;
eep.on = ON;
STO = 0;
STA = 1;
while (eep.step != EEP_READY_INT);
eep.on = OFF;
for (y=0; y<8192; y++);
}
EEPwp = 1; // write OFF
//---------------------------------------------------------------
return eep.addr1st;
}
//-----------------------------------------------------------------------------
char EPROM_ReadBlock (unsigned char addr, unsigned char l, unsigned char *da)
{
unsigned x;
unsigned int epAddr;
//---------------------------------------------------------------
for (x=0; x<l; x++) {
eep.chipAddr = 0xa0;
eep.addr1st = addr+x;
eep.dataLen = 0;
eep.step = EEP_WRITE_INT;
eep.on = ON;
STO = 0;
STA = 1;
while (eep.step != EEP_READY_INT);
// Read time data from eep.
eep.chipAddr = 0xa1;
eep.dataLen = 1;
eep.dataPtr = 0;
eep.dataArray = da+x;
eep.step = EEP_READ_INT;
STO = 0;
STA = 1;
while (eep.step != EEP_READY_INT);
eep.on = OFF;
}
//---------------------------------------------------------------
return epAddr+1;
}
//-----------------------------------------------------------------------------
// SMBUS (vector 7) Interrupt handler.
//-----------------------------------------------------------------------------
void smbus_int (void) interrupt SMB_VECTOR using 3
{
if (eep.on) {
switch (eep.step) {
case EEP_READY_INT :
break;
case EEP_WRITE_INT :
if (SMB0STA == SMB_START) {
SMB0DAT = eep.chipAddr;
STA = 0;
eep.step++;
}
break;
case EEP_WRITE_INT+1 :
SMB0DAT = eep.addr1st;
eep.step++;
break;
case EEP_WRITE_INT+2 :
if (eep.dataPtr < eep.dataLen) {
SMB0DAT = eep.dataArray;
} else {
STO = 1;
eep.step = EEP_READY_INT;
}
break;
//-------------------------------------------------------------------------
case EEP_READ_INT :
if (SMB0STA == SMB_START) {
STA = 0;
SMB0DAT = eep.chipAddr;
eep.step++;
}
break;
case EEP_READ_INT+1 :
if (eep.dataLen == 1)
AA = 0;
eep.step++;
break;
case EEP_READ_INT+2 :
eep.dataArray = SMB0DAT;
switch (eep.dataLen-eep.dataPtr) {
case 0 :
AA = 1;
STO = 1;
eep.step = EEP_READY_INT;
break;
case 1 :
AA = 0;
break;
default :
break;
}
break;
}
SI = 0;
}
} 还是07年用过的。。。太久远了。。。 回复【5楼】pingsiu
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谢谢不过看的有点晕呼呢 继续求解啊前两天出去了 。。。。 主要是 24c3216位的地址在中断里面怎么处理??? 楼主解决了么 地址怎么处理的 void write_byte(unsigned char addr, unsigned char write_data)
// 在指定地址addr处写入数据write_data
{
unsigned int adrl = addr%256;
unsigned int adrh = addr/256;
start();
shout(OP_WRITE);
shout(adrh);
shout(adrl);
shout(write_data);
stop();
DelayMS(10); // 写入周期
}
中
unsigned int adrl = addr%256;
unsigned int adrh = addr/256;
就是你想要的吧,不知道对不对。 如何通过smbus得到电池信息 学习!!!{:smile:}{:sad:}{:biggrin:}
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