LS7266R1 Ver la hoja de datos (PDF) - LSI Corporation

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LS7266R1

24-BIT DUAL-AXIS QUADRATURE COUNTER

LSI Corporation  

//Setup PR Reg. for Modulo N Counter to 0x123456

outp(XDATA(Addr),0x56); //Least significant Byte first

outp(XDATA(Addr),0x34); //then middle byte

outp(XDATA(Addr),0x12); //then most significant byte

//Enable Counters

outp(XCMD(Addr),IOR(EnAB));

}

/* Write_7266_PR

Input: Addr has Address of 7266 counter.

Data: has 24 bit data to be written to PR register

*/

void Write_7266_PR(int Addr,unsigned long Data);

void Write_7266_PR(int Addr,unsigned long Data)

{

outp(XCMD(Addr),RLD(Rst_BP));

//Reset Byte Pointer to Synchronize Byte Writing

outp(XDATA(Addr),(unsigned char)Data);

Data >>= 8;

outp (XDATA(Addr),(unsigned char)Data);

Data >>= 8;

outp(XDATA(Addr),(unsigned char)Data);

}

/* Read_7266_OL

Input: Addr has Address of 7266 counter.

Output: Data returns 24 bit OL register value.

*/

unsigned long Read_7266_OL(int Addr);

unsigned long Read_7266_OL(int Addr)

{ unsigned long Data=0;

outp(XCMD(Addr),(RLD(Rst_BP + Trf_Cntr_OL)); //Reset Byte Pointer to Synchronize Byte reading and

Transferring of data from counters to OL.

Data |=(unsigned long)inp(XDATA(Addr));

//read byte 0 from OL

lrotr(Data,8);

//Rotate for next Byte

Data |=(unsigned long)inp(XDATA(Addr));

//read byte 1 from OL

lrotr(Data,8);

//Rotate for next Byte

Data |=(unsigned long)inp(XDATA(Addr)); //read byte 2 from OL

lrotr(Data,16);

//Rotate for last Byte

return(Data);

}

/* Get_7266_Flags

Input: Addr has Address of 7266 counter.

returns Flags of counter

*/

unsigned char Get_7266_Flags(int Addr);

unsigned char Get_7266_Flags(int Addr)

{

return(inp(XCMD(Addr)));

}

7266R1-011598-14

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