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

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AM85C30
(Rev.:1992)

Serial Communications Controller

Advanced Micro Devices 

SCC Application Notes

AMD

for(i=0; i < num; i++)/*process the loop until all char are

received*/

{

rx = 0;

while(rx==0)

{

temp = inportb(aport);/*load RR0 to check for rec. char

available*/

rx = temp & 0x01;

}

*ptr = inportb(aportd);/*Input a char from the rec. FIFO*/

ptr++;

}

ptr = ptr – num;

/*Restore inital value of pointer*/

}

/*RECEIVE LENGTH OG FILE ASYNCHRONOUSLY AT 19.2 kBaud*/

recnum()

{

unsigned char temp, rx;

unsigned int i, count;

for(i=0; i < 0x03; i++)/*process the loop until all char are

received*/

{

rx = 0;

while(rx==0)

{

temp = inportb(aport);/*load RR0 to check for rec. char

available*/

rx = temp & 0x01;

}

*ptr = inportb(aportd);/*Input a char from the rec. FIFO*/

ptr++;

}

ptr = ptr – 0x03;

;

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7–45

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