AM8530 datasheet(185/194 Pages) AMD

185 / 194 page

SCC Application Notes

AMD

7–36

unsigned char temp;

/*temporary storage for transmit/receive

character

array[0]=0x9

array[1]=0xC0;

/*hardware reset the 8530*/

array[2]=0x4

array[3]=0x20;

/*x1 clock, SDLC mode, parity disable*/

array[4]=0x1;

array[5]=0x40;

/*choose DMA request on transmit*/

array[6]=0x3;

array[7]=0xFC;

/*Rx 8bits/char, autoenabled, hunt mode*/

array[8]=0x5;

array[9]=0x63;

/*Tx 8bits/char, RTS enabled, TxCRC

enabled*/

array[10]=0x6;

array[11]=0x02;

/*address for this device is 02*/

array[12]=0x7;

array[13]=0x7E;

/*SDLC flag pattern 01111110*/

array[14]=0x9;

array[15]=0x02;

/*No vector is returned*/

array[16]=0xA;

array[17]=0x00;

/*Send CRC and Flag on underrun, do not

abort*/

array[18]=0xB;

array[19]=0x08;

/*rec. clock=RTxC pin, Transmit clk=TRxC

pin*/

array[20]=0xE;

array[21]=0x00;

array[22]=0x3;

array[23]=0xFD;

/*Rx enable*/

array[24]=0x5;

array[25]=0x6B;

/*Tx enable*/

array[26]=0x00;

array[27]=0x80;

/*reset TxCRC*/

array[28]=0x1;

array[29]=0xC0;

/*DMA request enabled*/

array[30]=0xF;

array[31]=0x08;

/*disable all interrupts except DCD

input*/

array[32]=0x0;

array[33]=0x10;

/*reset external/status interrupt twice*/

array[34]=0x0;

array[35]=0x10;

array[36]=0x1;

array[37]=0xC9;

/*Rx interrupt on 1st char. or special

condition*/

array[38]=0x9;

array[39]=0x0A

/*set master interrupt enable to 1*/

/*BEGIN INITIALIZATION ROUTINE*/

temp = inportb(port);

/*read from RR0*/

while(i<arraysize)

{

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

}

/*THIS ROUTINE INITIALIZES THE 9517 DMA CONTROLLER TO TRANSMIT

LENGTH OF FILE*/

dmainit()

{

AM8530 Datasheet(PDF) 185 Page - Advanced Micro Devices

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