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4.4DEMO3
/* demo 3 | : Count high pulse of PC0 | */ | |
/* | (initial Low & active High) | */ | |
/* step 1 | : run DEMO3.EXE | */ | |
/* |
| */ | |
#include "PIO.H" |
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#define A1_8259 | 0x20 |
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#define A2_8259 | 0xA0 |
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#define EOI | 0x20 |
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WORD init_low();
WORD wBase,wIrq;
static void interrupt irq_service(); int COUNT,irqmask,now_int_state;
int main()
{
int i,j;
WORD wBoards,wRetVal,t1,t2,t3,t4,t5,t6;
WORD wSubVendor,wSubDevice,wSubAux,wSlotBus,wSlotDevice; char c;
clrscr(); |
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/* step1 : find | */ | ||
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. | /* select card_0 */ | ||
/* step2 : enable all D/I/O port | |||
/* /RESET | */ | ||
outportb(wBase,1); | */ | ||
/* step3 : configure I/O direction |
| */ | |
outportb(wBase+0xcc,0x00); | /* set CON3 as D/I ports */ | ||
COUNT=0; |
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init_low(); |
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printf("\n\n***** show the count of High_pulse *****\n"); |
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for (;;) |
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{ |
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gotoxy(1,8); |
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printf("\nCOUNT=%d",COUNT); |
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if (kbhit()!=0) break; |
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} | /* disable all interrupt */ | ||
outportb(wBase+5,0); | |||
PIO_DriverClose(); |
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} |
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/* Use PC0 as external interrupt signal |
| */ | |
WORD init_low() |
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{ |
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disable(); | /* disable all interrupt */ | ||
outportb(wBase+5,0); | |||
if (wIrq<8) |
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{ |
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