LS7166_08 datasheet(19/19 Pages) LSI

19 / 19 page

/* Write data into 7166 Preset Register

Addr has address of 7166 counter

Data has 24 bit data to be written to PR register */

void Write_7166_PR(int Addr, unsigned long Data);

void Write_7166_PR(int Addr, unsigned long Data){

outp(CTRLMODE(Addr), MCR(Rst_BP));

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

Data >>= 8;

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

Data >>= 8;

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

}

/* Read 7166 Output Latch

Addr has address of 7166 counter

Data returns 24 bit OL register value. */

unsigned long Read_7166_OL(int Addr);

unsigned long Read_7166_OL(int Addr){

unsigned long Data = 0;

outp(CTRLMODE(Addr), MCR(Rst_BP + Trf_CNTR_OL));

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

lrotr(Data,8);

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

lrotr(Data,8);

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

lrotr(Data,16);

return(Data);

}

/* Read Output Status Register

Addr has address of 7166 counter

returns OSR data */

unsigned long Read_7166_OSR(int Addr);

unsigned long Read_7166_OSR(int Addr){

return(inp(CNTRLMODE(Addr)));

}

7166-121508-19

LS7166 Datasheet(PDF) 19 Page - LSI Computer Systems