mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2025-10-31 13:10:19 -04:00
59 lines
1.1 KiB
C
59 lines
1.1 KiB
C
#include <windows.h>
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#include <stdio.h>
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int ptt_(int *nport, int *ntx, int *ndtr, int *iptt)
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{
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static HANDLE hFile;
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static int open=0, nhold=0;
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char s[10];
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int i3,i4,i5,i6,i9,i00;
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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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nhold=0;
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if(*nport>100) nhold=1;
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if(*ntx && (!open)) {
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sprintf(s,"\\\\.\\COM%d",*nport%100);
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hFile=CreateFile(
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TEXT(s),
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GENERIC_WRITE,
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0,
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NULL,
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OPEN_EXISTING,
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FILE_ATTRIBUTE_NORMAL,
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NULL
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);
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if(hFile==INVALID_HANDLE_VALUE) {
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printf("PTT: Cannot open COM port %d.\n",*nport%100);
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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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if(*ndtr)
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EscapeCommFunction(hFile,5); //set DTR
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else
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EscapeCommFunction(hFile,3); //set RTS
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*iptt=1;
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}
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else {
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if(*ndtr)
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EscapeCommFunction(hFile,6); //clear DTR
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else
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EscapeCommFunction(hFile,4); //clear RTS
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EscapeCommFunction(hFile,9); //clear BREAK
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if(nhold==0) {
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i00=CloseHandle(hFile);
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open=0;
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}
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*iptt=0;
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}
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return(0);
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}
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