--- /dev/null
+#ifdef WIN32
+#include <windows.h>
+#else
+#include <termios.h>
+#include <fcntl.h>
+#include <errno.h>
+#endif
+#include <msp/strings/formatter.h>
+#include "except.h"
+#include "serial.h"
+
+using namespace std;
+
+namespace {
+
+using namespace Msp;
+using namespace Msp::IO;
+
+#ifdef WIN32
+typedef DCB DeviceState;
+#else
+typedef termios DeviceState;
+#endif
+
+void get_state(Handle handle, DeviceState &state)
+{
+#ifdef WIN32
+ GetCommState(handle, &state);
+#else
+ tcgetattr(handle, &state);
+#endif
+}
+
+void set_state(Handle handle, DeviceState &state)
+{
+#ifdef WIN32
+ if(SetCommState(handle, &state)==0)
+ throw SystemError("Cannot set serial port parameters", GetLastError());
+#else
+ if(tcsetattr(handle, TCSADRAIN, &state)==-1)
+ throw SystemError("Cannot set serial port parameters", errno);
+#endif
+}
+
+void set_baud_rate(DeviceState &state, unsigned baud)
+{
+#ifdef WIN32
+ state.BaudRate = baud;
+#else
+ speed_t speed;
+ switch(baud)
+ {
+ case 0: speed = B0; break;
+ case 50: speed = B50; break;
+ case 75: speed = B75; break;
+ case 110: speed = B110; break;
+ case 134: speed = B134; break;
+ case 150: speed = B150; break;
+ case 200: speed = B200; break;
+ case 300: speed = B300; break;
+ case 600: speed = B600; break;
+ case 1200: speed = B1200; break;
+ case 1800: speed = B1800; break;
+ case 2400: speed = B2400; break;
+ case 4800: speed = B4800; break;
+ case 9600: speed = B9600; break;
+ case 19200: speed = B19200; break;
+ case 38400: speed = B38400; break;
+ case 57600: speed = B57600; break;
+ case 115200: speed = B115200; break;
+ case 230400: speed = B230400; break;
+ default: throw InvalidParameterValue("Invalid baud rate");
+ }
+
+ cfsetospeed(&state, speed);
+ cfsetispeed(&state, speed);
+#endif
+}
+
+void set_data_bits(DeviceState &state, unsigned bits)
+{
+#ifdef WIN32
+ state.ByteSize = bits;
+#else
+ tcflag_t flag;
+ switch(bits)
+ {
+ case 5: flag = CS5; break;
+ case 6: flag = CS6; break;
+ case 7: flag = CS7; break;
+ case 8: flag = CS8; break;
+ default: throw InvalidParameterValue("Invalid data bit count");
+ }
+
+ state.c_cflag = (state.c_cflag&~CSIZE)|flag;
+#endif
+}
+
+void set_parity(DeviceState &state, Serial::Parity par)
+{
+#ifdef WIN32
+ switch(par)
+ {
+ case Serial::NONE: state.Parity = NOPARITY; break;
+ case Serial::EVEN: state.Parity = EVENPARITY; break;
+ case Serial::ODD: state.Parity = ODDPARITY; break;
+ default: throw InvalidParameterValue("Invalid parity");
+ }
+#else
+ tcflag_t flag;
+ switch(par)
+ {
+ case Serial::NONE: flag = 0; break;
+ case Serial::EVEN: flag = PARENB; break;
+ case Serial::ODD: flag = PARENB|PARODD; break;
+ default: throw InvalidParameterValue("Invalid parity");
+ }
+
+ state.c_cflag = (state.c_cflag&~(PARENB|PARODD))|flag;
+#endif
+}
+
+void set_stop_bits(DeviceState &state, unsigned bits)
+{
+#ifdef WIN32
+ switch(bits)
+ {
+ case 1: state.StopBits = ONESTOPBIT; break;
+ case 2: state.StopBits = TWOSTOPBITS; break;
+ default: throw InvalidParameterValue("Invalid stop bit count");
+ }
+#else
+ tcflag_t flag;
+ switch(bits)
+ {
+ case 1: flag = 0; break;
+ case 2: flag = CSTOPB; break;
+ default: throw InvalidParameterValue("Invalid stop bit count");
+ }
+
+ state.c_cflag = (state.c_cflag&~CSTOPB)|flag;
+#endif
+}
+
+}
+
+
+namespace Msp {
+namespace IO {
+
+Serial::Serial(const string &descr)
+{
+ string::size_type comma = descr.find(',');
+ string port = descr.substr(0, comma);
+
+#ifdef WIN32
+ port = "\\\\.\\"+port;
+
+ handle = CreateFile(port.c_str(), GENERIC_READ|GENERIC_WRITE, 0, 0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
+ if(handle==INVALID_HANDLE_VALUE)
+ throw SystemError(format("Can't open serial port '%s'", port), GetLastError());
+ mode = M_READ|M_WRITE;
+
+ COMMTIMEOUTS timeouts;
+ timeouts.ReadIntervalTimeout = MAXDWORD;
+ timeouts.ReadTotalTimeoutMultiplier = MAXDWORD;
+ timeouts.ReadTotalTimeoutConstant = MAXDWORD-1;
+ timeouts.WriteTotalTimeoutMultiplier = 0;
+ timeouts.WriteTotalTimeoutConstant = 0;
+ SetCommTimeouts(handle, &timeouts);
+#else
+ if(port.compare(0, 5, "/dev/"))
+ port = "/dev/"+port;
+
+ handle = open(port.c_str(), O_RDWR);
+ if(handle==-1)
+ throw SystemError(format("Can't open serial port '%s'", port), errno);
+ mode = M_READ|M_WRITE;
+
+ termios t;
+ tcgetattr(handle, &t);
+ t.c_lflag &= ~(ECHO|ICANON);
+ t.c_oflag &= ~OPOST;
+ tcsetattr(handle, TCSADRAIN, &t);
+#endif
+
+ if(comma!=string::npos)
+ {
+ try
+ {
+ set_parameters(descr.substr(comma+1));
+ }
+ catch(...)
+ {
+ close();
+ throw;
+ }
+ }
+
+ set_events(P_INPUT);
+}
+
+Serial::~Serial()
+{
+ close();
+}
+
+void Serial::close()
+{
+#ifdef WIN32
+ CloseHandle(handle);
+#else
+ ::close(handle);
+#endif
+}
+
+void Serial::set_block(bool b)
+{
+ if(b)
+ mode = mode|M_NONBLOCK;
+ else
+ mode = mode&~M_NONBLOCK;
+
+#ifndef WIN32
+ int flags = fcntl(handle, F_GETFD);
+ fcntl(handle, F_SETFL, (flags&O_NONBLOCK)|(b?0:O_NONBLOCK));
+#endif
+}
+
+void Serial::set_baud_rate(unsigned rate)
+{
+ DeviceState state;
+ get_state(handle, state);
+ ::set_baud_rate(state, rate);
+ set_state(handle, state);
+}
+
+void Serial::set_data_bits(unsigned bits)
+{
+ DeviceState state;
+ get_state(handle, state);
+ ::set_data_bits(state, bits);
+ set_state(handle, state);
+}
+
+void Serial::set_parity(Parity par)
+{
+ DeviceState state;
+ get_state(handle, state);
+ ::set_parity(state, par);
+ set_state(handle, state);
+}
+
+void Serial::set_stop_bits(unsigned bits)
+{
+ DeviceState state;
+ get_state(handle, state);
+ ::set_stop_bits(state, bits);
+ set_state(handle, state);
+}
+
+void Serial::set_parameters(const string ¶ms)
+{
+ unsigned i;
+ for(i=0; i<params.size() && isdigit(params[i]); ++i) ;
+ if(i+4!=params.size() || params[i]!=',')
+ throw InvalidParameterValue("Invalid parameter string");
+ if(params[i+1]<'5' || params[i+1]>'8')
+ throw InvalidParameterValue("Invalid data bit count");
+ if(params[i+2]!='N' && params[i+2]!='E' && params[i+2]!='O')
+ throw InvalidParameterValue("Invalid parity");
+ if(params[i+3]!='1' && params[i+3]!='2')
+ throw InvalidParameterValue("Invalid stop bit count");
+
+ DeviceState state;
+ get_state(handle, state);
+ ::set_baud_rate(state, lexical_cast<unsigned>(params.substr(0, i)));
+ ::set_data_bits(state, params[i+1]-'0');
+ ::set_parity(state, (params[i+2]=='E' ? EVEN : params[i+2]=='O' ? ODD : NONE));
+ ::set_stop_bits(state, params[i+3]-'0');
+ set_state(handle, state);
+}
+
+unsigned Serial::do_write(const char *buf, unsigned size)
+{
+ if(size==0)
+ return 0;
+
+#ifdef WIN32
+ DWORD ret;
+ if(WriteFile(handle, buf, size, &ret, 0)==0)
+ throw SystemError("Writing to serial port failed", GetLastError());
+#else
+ int ret = ::write(handle, buf, size);
+ if(ret==-1)
+ {
+ if(errno==EAGAIN)
+ return 0;
+ else
+ throw SystemError("Writing to serial port failed", errno);
+ }
+#endif
+
+ return ret;
+}
+
+unsigned Serial::do_read(char *buf, unsigned size)
+{
+ if(size==0)
+ return 0;
+
+#ifdef WIN32
+ DWORD ret;
+ if(ReadFile(handle, buf, size, &ret, 0)==0)
+ throw SystemError("Reading from serial port failed", GetLastError());
+#else
+ int ret = ::read(handle, buf, size);
+ if(ret==-1)
+ {
+ if(errno==EAGAIN)
+ return 0;
+ else
+ throw SystemError("Reading from serial port failed", errno);
+ }
+#endif
+
+ return ret;
+}
+
+Handle Serial::get_event_handle()
+{
+#ifdef WIN32
+ throw Exception("Serial port events not supported on win32 yet");
+#else
+ return handle;
+#endif
+}
+
+} // namespace IO
+} // namespace Msp
projects / libs / core.git / blobdiff