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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/extensions/api/serial/serial_connection.h"
#include <string>
#include <windows.h>
namespace extensions {
bool SerialConnection::PostOpen() {
// Set timeouts so that reads return immediately with whatever could be read
// without blocking.
COMMTIMEOUTS timeouts = { 0 };
timeouts.ReadIntervalTimeout = MAXDWORD;
if (!::SetCommTimeouts(file_, &timeouts))
return false;
DCB dcb = { 0 };
dcb.DCBlength = sizeof(dcb);
if (!GetCommState(file_, &dcb))
return false;
if (bitrate_ >= 0) {
bool speed_found = true;
DWORD speed = CBR_9600;
switch (bitrate_) {
case 110: speed = CBR_110; break;
case 300: speed = CBR_300; break;
case 600: speed = CBR_600; break;
case 1200: speed = CBR_1200; break;
case 2400: speed = CBR_2400; break;
case 4800: speed = CBR_4800; break;
case 9600: speed = CBR_9600; break;
case 14400: speed = CBR_14400; break;
case 19200: speed = CBR_19200; break;
case 38400: speed = CBR_38400; break;
case 57600: speed = CBR_57600; break;
case 115200: speed = CBR_115200; break;
case 128000: speed = CBR_128000; break;
case 256000: speed = CBR_256000; break;
default: speed_found = false; break;
}
if (speed_found)
dcb.BaudRate = speed;
}
dcb.ByteSize = 8;
dcb.StopBits = ONESTOPBIT;
dcb.Parity = NOPARITY;
if (!SetCommState(file_, &dcb))
return false;
return true;
}
bool SerialConnection::GetControlSignals(ControlSignals &control_signals) {
DWORD dwModemStatus;
if (!GetCommModemStatus(file_, &dwModemStatus))
return false;
control_signals.dcd = (MS_RLSD_ON & dwModemStatus) != 0;
control_signals.cts = (MS_CTS_ON & dwModemStatus) != 0;
return true;
}
bool SerialConnection::
SetControlSignals(const ControlSignals &control_signals) {
if (control_signals.should_set_dtr) {
if (!EscapeCommFunction(file_, control_signals.dtr ? SETDTR : CLRDTR))
return false;
}
if (control_signals.should_set_rts) {
if (!EscapeCommFunction(file_, control_signals.rts ? SETRTS : CLRRTS))
return false;
}
return true;
}
} // namespace extensions
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