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hcomm INVALID HANDLE VALUE

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* initialize hcomm to invalid handle value when creating
    new WIN32 class instance
  * test for open port before attempting to reopen
    close port if necessary
This commit is contained in:
David Freese 2021-01-29 14:13:18 -06:00
parent 30868e5f11
commit c892e43163
1 changed files with 5 additions and 2 deletions
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7
src/support/serial.cxx
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@ -87,6 +87,7 @@ bool Cserial::CheckPort(string dev) {
///////////////////////////////////////////////////////
bool Cserial::OpenPort() {
if (IsOpen()) ClosePort();
if ((fd = open( device.c_str(), O_RDWR | O_NOCTTY | O_NDELAY )) < 0)
return false;
#if SERIAL_DEBUG
@ -279,7 +280,7 @@ void Cserial::ClosePort()
if (fd < 0) return;
int myfd = fd;
fd = -1;
// Some serial drivers force RTS and DTR high immediately upon
// opening the port, so our origstatus will indicate those bits
// high (though the lines weren't actually high before we opened).
@ -423,6 +424,8 @@ bool Cserial::OpenPort()
{
if (device.empty()) return false;
if (IsOpen()) ClosePort();
string COMportname = "//./";
COMportname.append(device);
@ -976,7 +979,7 @@ Cserial::Cserial() {
serptt = false;
baud = CBR_9600;
stopbits = 2;
hComm = 0;
hComm = INVALID_HANDLE_VALUE;
}
Cserial::Cserial( std::string portname) {