AM85C30(1992) 查看數據表（PDF） - Advanced Micro Devices

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AM85C30
(Rev.:1992)

Serial Communications Controller

Advanced Micro Devices 

AMD

SCC Application Notes

inportb(port);

outportb(port, 0x01);

temp = inportb(port);

while(count<300)

{

count++;

}

ef = temp & 0x80;

}

}

/*THIS ROUTINE LOADS THE LENGTH OF THE FILE TO BE RECEIVED*/

length()

{

unsigned int *iptr;

ptr++;

iptr = ptr;

/*assigns iptr as an address of a 16–bit

integer*/

num = *iptr;

}

/*THIS ROUTINE INITIALIZES THE 8530 FOR ASYNC. RECEIVE*/

asccinit()

{

unsigned char array[arraysiz], temp;

unsigned int =i=0;

array[0]=0x9;

array[1]=0xC0;

/*hardware reset*/

array[2]=0x4;

array[3]=0x44;

/*X16 clock, 1 stop bits*/

array[4]=0x3;

array[5]=0xE0;

/*8 bits/character*/

array[6]=0x5;

array[7]=0x60;

/*8 bits/character*/

array[8]=0xB;

array[9]=0x56;

/*RxC = BR gen, TxC = BR gen, TRxCout =

BR*/

array[10]=0xC;

array[11]=0x06; /*set BR gen for 19.2 kBaud*/

array[12]=0xD;

array[13]=0x00;

array[14]=0xE;

array[15]=0x03; /*set DTR/REQ, enable BR gen, PCLK = BR

source*/

array[16]=0x3;

array[17]=0xE1; /*enable receiver*/

temp = inportb(aport);

/*Read from RR0 to

set up state machine*/

while(i<arraysiz)

{

outportb(aport, array[i++]);

}

}

/*RECEIVE FILE ASYNCHRONOUSLY AT 19.2 kBaud*/

recfile()

{

unsigned char temp, rx;

unsigned int i, count;

rx = 0;

temp = 0;

7–44

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