TI中文支持网DSP-TMS320F2801做主机，产生时钟200KHz时钟SCL时钟，EEPROM是24LC128
void EEPROM_R(Uint16 address,Uint16 n,Uint16 s)
{
Uint16 i,data_temp;
// Check if bus busy
if (I2caRegs.I2CSTR.bit.BB != 0)//总线忙位，不能手动清除
{
return;
}
I2caRegs.I2CSAR = 0x50;// Setup slave address-7bit
I2caRegs.I2CCNT = 2;
I2caRegs.I2CMDR.all = 0x6620;// Send data to setup EEPROM address
if(I2caRegs.I2CSTR.bit.NACK != 0) return;
//存储器首地址-2字节
while(I2caRegs.I2CSTR.bit.XRDY != 1);
I2caRegs.I2CDXR = (address>>8);
if(I2caRegs.I2CSTR.bit.NACK != 0) return;
while(I2caRegs.I2CSTR.bit.XRDY != 1);
I2caRegs.I2CDXR = (address&0x00FF);
if(I2caRegs.I2CSTR.bit.NACK != 0) return;
//DELAY_US(100);
I2caRegs.I2CSAR = 0x50;// Setup slave address-7bit
I2caRegs.I2CCNT = (n<<1);
I2caRegs.I2CMDR.all = 0x6C20;
if(I2caRegs.I2CSTR.bit.NACK != 0) return;
for(i=0;i<n;i++)
{
while(I2caRegs.I2CSTR.bit.RRDY != 1);
data_temp = (I2caRegs.I2CDRR & 0x00FF);
if(I2caRegs.I2CSTR.bit.NACK != 0) return;
while(I2caRegs.I2CSTR.bit.RRDY != 1);
data_temp |= I2caRegs.I2CDRR << 8;
if(I2caRegs.I2CSTR.bit.NACK != 0) return;
MK_Data[s+i] = data_temp;
}
do{}while(I2caRegs.I2CSTR.bit.SCD != 1); //是否有停止信号
}
Seven Han：
你好，建议参考TI官方例程。下载SPRC191软件包，安装后参考i2c_eeprom。
C:\tidcs\c28\DSP280x\v170
DSP-TMS320F2801做主机，产生时钟200KHz时钟SCL时钟，EEPROM是24LC128
void EEPROM_R(Uint16 address,Uint16 n,Uint16 s)
{
Uint16 i,data_temp;
// Check if bus busy
if (I2caRegs.I2CSTR.bit.BB != 0)//总线忙位，不能手动清除
{
return;
}
I2caRegs.I2CSAR = 0x50;// Setup slave address-7bit
I2caRegs.I2CCNT = 2;
I2caRegs.I2CMDR.all = 0x6620;// Send data to setup EEPROM address
if(I2caRegs.I2CSTR.bit.NACK != 0) return;
//存储器首地址-2字节
while(I2caRegs.I2CSTR.bit.XRDY != 1);
I2caRegs.I2CDXR = (address>>8);
if(I2caRegs.I2CSTR.bit.NACK != 0) return;
while(I2caRegs.I2CSTR.bit.XRDY != 1);
I2caRegs.I2CDXR = (address&0x00FF);
if(I2caRegs.I2CSTR.bit.NACK != 0) return;
//DELAY_US(100);
I2caRegs.I2CSAR = 0x50;// Setup slave address-7bit
I2caRegs.I2CCNT = (n<<1);
I2caRegs.I2CMDR.all = 0x6C20;
if(I2caRegs.I2CSTR.bit.NACK != 0) return;
for(i=0;i<n;i++)
{
while(I2caRegs.I2CSTR.bit.RRDY != 1);
data_temp = (I2caRegs.I2CDRR & 0x00FF);
if(I2caRegs.I2CSTR.bit.NACK != 0) return;
while(I2caRegs.I2CSTR.bit.RRDY != 1);
data_temp |= I2caRegs.I2CDRR << 8;
if(I2caRegs.I2CSTR.bit.NACK != 0) return;
MK_Data[s+i] = data_temp;
}
do{}while(I2caRegs.I2CSTR.bit.SCD != 1); //是否有停止信号
}
Seven Han：
回复 user4938334:
仿真时查看写入地址的数据是否正确
The receive FIFO can be configured to generate an interrupt after receiving a defined number of bytes, up to16.
程序中fifo的 number bytes设置是多少？
DSP-TMS320F2801做主机，产生时钟200KHz时钟SCL时钟，EEPROM是24LC128
void EEPROM_R(Uint16 address,Uint16 n,Uint16 s)
{
Uint16 i,data_temp;
// Check if bus busy
if (I2caRegs.I2CSTR.bit.BB != 0)//总线忙位，不能手动清除
{
return;
}
I2caRegs.I2CSAR = 0x50;// Setup slave address-7bit
I2caRegs.I2CCNT = 2;
I2caRegs.I2CMDR.all = 0x6620;// Send data to setup EEPROM address
if(I2caRegs.I2CSTR.bit.NACK != 0) return;
//存储器首地址-2字节
while(I2caRegs.I2CSTR.bit.XRDY != 1);
I2caRegs.I2CDXR = (address>>8);
if(I2caRegs.I2CSTR.bit.NACK != 0) return;
while(I2caRegs.I2CSTR.bit.XRDY != 1);
I2caRegs.I2CDXR = (address&0x00FF);
if(I2caRegs.I2CSTR.bit.NACK != 0) return;
//DELAY_US(100);
I2caRegs.I2CSAR = 0x50;// Setup slave address-7bit
I2caRegs.I2CCNT = (n<<1);
I2caRegs.I2CMDR.all = 0x6C20;
if(I2caRegs.I2CSTR.bit.NACK != 0) return;
for(i=0;i<n;i++)
{
while(I2caRegs.I2CSTR.bit.RRDY != 1);
data_temp = (I2caRegs.I2CDRR & 0x00FF);
if(I2caRegs.I2CSTR.bit.NACK != 0) return;
while(I2caRegs.I2CSTR.bit.RRDY != 1);
data_temp |= I2caRegs.I2CDRR << 8;
if(I2caRegs.I2CSTR.bit.NACK != 0) return;
MK_Data[s+i] = data_temp;
}
do{}while(I2caRegs.I2CSTR.bit.SCD != 1); //是否有停止信号
}
user4938334：
回复 Seven Han:
你好，Seven Han
接收字节数设置的是2，
原因我已经找到了，是内存与EEPROM地址不对应导致的乱码，（内存以字为单位存储，EEPROM以字节为单位存储，因此需要进行地址转换才能正确读写）
谢谢！！！！！！！！！
DSP-TMS320F2801做主机，产生时钟200KHz时钟SCL时钟，EEPROM是24LC128
void EEPROM_R(Uint16 address,Uint16 n,Uint16 s)
{
Uint16 i,data_temp;
// Check if bus busy
if (I2caRegs.I2CSTR.bit.BB != 0)//总线忙位，不能手动清除
{
return;
}
I2caRegs.I2CSAR = 0x50;// Setup slave address-7bit
I2caRegs.I2CCNT = 2;
I2caRegs.I2CMDR.all = 0x6620;// Send data to setup EEPROM address
if(I2caRegs.I2CSTR.bit.NACK != 0) return;
//存储器首地址-2字节
while(I2caRegs.I2CSTR.bit.XRDY != 1);
I2caRegs.I2CDXR = (address>>8);
if(I2caRegs.I2CSTR.bit.NACK != 0) return;
while(I2caRegs.I2CSTR.bit.XRDY != 1);
I2caRegs.I2CDXR = (address&0x00FF);
if(I2caRegs.I2CSTR.bit.NACK != 0) return;
//DELAY_US(100);
I2caRegs.I2CSAR = 0x50;// Setup slave address-7bit
I2caRegs.I2CCNT = (n<<1);
I2caRegs.I2CMDR.all = 0x6C20;
if(I2caRegs.I2CSTR.bit.NACK != 0) return;
for(i=0;i<n;i++)
{
while(I2caRegs.I2CSTR.bit.RRDY != 1);
data_temp = (I2caRegs.I2CDRR & 0x00FF);
if(I2caRegs.I2CSTR.bit.NACK != 0) return;
while(I2caRegs.I2CSTR.bit.RRDY != 1);
data_temp |= I2caRegs.I2CDRR << 8;
if(I2caRegs.I2CSTR.bit.NACK != 0) return;
MK_Data[s+i] = data_temp;
}
do{}while(I2caRegs.I2CSTR.bit.SCD != 1); //是否有停止信号
}
Seven Han：
回复 user4938334:
不客气，ruo yang，问题找到就好！！
