51 lines
983 B
C
51 lines
983 B
C
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#include <windows.h>
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#include <stdio.h>
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int ptt_(int *nport, int *ntx, int *iptt)
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{
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static HANDLE hFile;
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static int open=0;
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char s[10];
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int i3=1,i4=1,i5=1,i6=1,i9=1,i00=1;
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if(*nport==0) {
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*iptt=*ntx;
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return(0);
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}
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if(*ntx && (!open)) {
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sprintf(s,"\\\\.\\COM%d",*nport);
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hFile=CreateFile(TEXT(s),GENERIC_WRITE,0,NULL,OPEN_EXISTING,
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FILE_ATTRIBUTE_NORMAL,NULL);
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if(hFile==INVALID_HANDLE_VALUE) {
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// printf("PTT: Cannot open COM port %d.\n",*nport);
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return 1;
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}
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open=1;
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}
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if(*ntx && open) {
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i3=EscapeCommFunction(hFile,3);
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i5=EscapeCommFunction(hFile,5);
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*iptt=1;
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}
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else {
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i4=EscapeCommFunction(hFile,4);
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i6=EscapeCommFunction(hFile,6);
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i9=EscapeCommFunction(hFile,9);
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i00=CloseHandle(hFile);
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*iptt=0;
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open=0;
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}
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/*
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if(i3==0) return 3;
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if(i4==0) return 4;
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if(i5==0) return 5;
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if(i6==0) return 6;
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if(i9==0) return 9;
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if(i00==0) return 10;
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*/
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return 0;
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}
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