aboutsummaryrefslogtreecommitdiffstats
path: root/gcc-4.8.3/gcc/ada/g-sercom-linux.adb
diff options
context:
space:
mode:
Diffstat (limited to 'gcc-4.8.3/gcc/ada/g-sercom-linux.adb')
-rw-r--r--gcc-4.8.3/gcc/ada/g-sercom-linux.adb304
1 files changed, 304 insertions, 0 deletions
diff --git a/gcc-4.8.3/gcc/ada/g-sercom-linux.adb b/gcc-4.8.3/gcc/ada/g-sercom-linux.adb
new file mode 100644
index 000000000..d485c1b75
--- /dev/null
+++ b/gcc-4.8.3/gcc/ada/g-sercom-linux.adb
@@ -0,0 +1,304 @@
+------------------------------------------------------------------------------
+-- --
+-- GNAT COMPILER COMPONENTS --
+-- --
+-- G N A T . S E R I A L _ C O M M U N I C A T I O N S --
+-- --
+-- B o d y --
+-- --
+-- Copyright (C) 2007-2012, AdaCore --
+-- --
+-- GNAT is free software; you can redistribute it and/or modify it under --
+-- terms of the GNU General Public License as published by the Free Soft- --
+-- ware Foundation; either version 3, or (at your option) any later ver- --
+-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
+-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
+-- or FITNESS FOR A PARTICULAR PURPOSE. --
+-- --
+-- As a special exception under Section 7 of GPL version 3, you are granted --
+-- additional permissions described in the GCC Runtime Library Exception, --
+-- version 3.1, as published by the Free Software Foundation. --
+-- --
+-- You should have received a copy of the GNU General Public License and --
+-- a copy of the GCC Runtime Library Exception along with this program; --
+-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
+-- <http://www.gnu.org/licenses/>. --
+-- --
+-- GNAT was originally developed by the GNAT team at New York University. --
+-- Extensive contributions were provided by Ada Core Technologies Inc. --
+-- --
+------------------------------------------------------------------------------
+
+-- This is the GNU/Linux implementation of this package
+
+with Ada.Streams; use Ada.Streams;
+with Ada; use Ada;
+with Ada.Unchecked_Deallocation;
+
+with System; use System;
+with System.Communication; use System.Communication;
+with System.CRTL; use System.CRTL;
+with System.OS_Constants;
+
+with GNAT.OS_Lib; use GNAT.OS_Lib;
+
+package body GNAT.Serial_Communications is
+
+ package OSC renames System.OS_Constants;
+
+ use type Interfaces.C.unsigned;
+
+ type Port_Data is new int;
+
+ subtype unsigned is Interfaces.C.unsigned;
+ subtype char is Interfaces.C.char;
+ subtype unsigned_char is Interfaces.C.unsigned_char;
+
+ function fcntl (fd : int; cmd : int; value : int) return int;
+ pragma Import (C, fcntl, "fcntl");
+
+ C_Data_Rate : constant array (Data_Rate) of unsigned :=
+ (B1200 => OSC.B1200,
+ B2400 => OSC.B2400,
+ B4800 => OSC.B4800,
+ B9600 => OSC.B9600,
+ B19200 => OSC.B19200,
+ B38400 => OSC.B38400,
+ B57600 => OSC.B57600,
+ B115200 => OSC.B115200);
+
+ C_Bits : constant array (Data_Bits) of unsigned :=
+ (CS7 => OSC.CS7, CS8 => OSC.CS8);
+
+ C_Stop_Bits : constant array (Stop_Bits_Number) of unsigned :=
+ (One => 0, Two => OSC.CSTOPB);
+
+ C_Parity : constant array (Parity_Check) of unsigned :=
+ (None => 0,
+ Odd => OSC.PARENB or OSC.PARODD,
+ Even => OSC.PARENB);
+
+ procedure Raise_Error (Message : String; Error : Integer := Errno);
+ pragma No_Return (Raise_Error);
+
+ ----------
+ -- Name --
+ ----------
+
+ function Name (Number : Positive) return Port_Name is
+ N : constant Natural := Number - 1;
+ N_Img : constant String := Natural'Image (N);
+ begin
+ return Port_Name ("/dev/ttyS" & N_Img (N_Img'First + 1 .. N_Img'Last));
+ end Name;
+
+ ----------
+ -- Open --
+ ----------
+
+ procedure Open
+ (Port : out Serial_Port;
+ Name : Port_Name)
+ is
+ use OSC;
+
+ C_Name : constant String := String (Name) & ASCII.NUL;
+ Res : int;
+
+ begin
+ if Port.H = null then
+ Port.H := new Port_Data;
+ end if;
+
+ Port.H.all := Port_Data (open
+ (C_Name (C_Name'First)'Address, int (O_RDWR + O_NOCTTY + O_NDELAY)));
+
+ if Port.H.all = -1 then
+ Raise_Error ("open: open failed");
+ end if;
+
+ -- By default we are in blocking mode
+
+ Res := fcntl (int (Port.H.all), F_SETFL, 0);
+
+ if Res = -1 then
+ Raise_Error ("open: fcntl failed");
+ end if;
+ end Open;
+
+ -----------------
+ -- Raise_Error --
+ -----------------
+
+ procedure Raise_Error (Message : String; Error : Integer := Errno) is
+ begin
+ raise Serial_Error with Message & " (" & Integer'Image (Error) & ')';
+ end Raise_Error;
+
+ ----------
+ -- Read --
+ ----------
+
+ overriding procedure Read
+ (Port : in out Serial_Port;
+ Buffer : out Stream_Element_Array;
+ Last : out Stream_Element_Offset)
+ is
+ Len : constant size_t := Buffer'Length;
+ Res : ssize_t;
+
+ begin
+ if Port.H = null then
+ Raise_Error ("read: port not opened", 0);
+ end if;
+
+ Res := read (Integer (Port.H.all), Buffer'Address, Len);
+
+ if Res = -1 then
+ Raise_Error ("read failed");
+ end if;
+
+ Last := Last_Index (Buffer'First, size_t (Res));
+ end Read;
+
+ ---------
+ -- Set --
+ ---------
+
+ procedure Set
+ (Port : Serial_Port;
+ Rate : Data_Rate := B9600;
+ Bits : Data_Bits := CS8;
+ Stop_Bits : Stop_Bits_Number := One;
+ Parity : Parity_Check := None;
+ Block : Boolean := True;
+ Local : Boolean := True;
+ Flow : Flow_Control := None;
+ Timeout : Duration := 10.0)
+ is
+ use OSC;
+
+ type termios is record
+ c_iflag : unsigned;
+ c_oflag : unsigned;
+ c_cflag : unsigned;
+ c_lflag : unsigned;
+ c_line : unsigned_char;
+ c_cc : Interfaces.C.char_array (0 .. 31);
+ c_ispeed : unsigned;
+ c_ospeed : unsigned;
+ end record;
+ pragma Convention (C, termios);
+
+ function tcgetattr (fd : int; termios_p : Address) return int;
+ pragma Import (C, tcgetattr, "tcgetattr");
+
+ function tcsetattr
+ (fd : int; action : int; termios_p : Address) return int;
+ pragma Import (C, tcsetattr, "tcsetattr");
+
+ function tcflush (fd : int; queue_selector : int) return int;
+ pragma Import (C, tcflush, "tcflush");
+
+ Current : termios;
+
+ Res : int;
+ pragma Warnings (Off, Res);
+ -- Warnings off, since we don't always test the result
+
+ begin
+ if Port.H = null then
+ Raise_Error ("set: port not opened", 0);
+ end if;
+
+ -- Get current port settings
+
+ Res := tcgetattr (int (Port.H.all), Current'Address);
+
+ -- Change settings now
+
+ Current.c_cflag := C_Data_Rate (Rate)
+ or C_Bits (Bits)
+ or C_Stop_Bits (Stop_Bits)
+ or C_Parity (Parity)
+ or CREAD;
+ Current.c_iflag := 0;
+ Current.c_lflag := 0;
+ Current.c_oflag := 0;
+
+ if Local then
+ Current.c_cflag := Current.c_cflag or CLOCAL;
+ end if;
+
+ case Flow is
+ when None =>
+ null;
+ when RTS_CTS =>
+ Current.c_cflag := Current.c_cflag or CRTSCTS;
+ when Xon_Xoff =>
+ Current.c_iflag := Current.c_iflag or IXON;
+ end case;
+
+ Current.c_ispeed := Data_Rate_Value (Rate);
+ Current.c_ospeed := Data_Rate_Value (Rate);
+ Current.c_cc (VMIN) := char'Val (0);
+ Current.c_cc (VTIME) := char'Val (Natural (Timeout * 10));
+
+ -- Set port settings
+
+ Res := tcflush (int (Port.H.all), TCIFLUSH);
+ Res := tcsetattr (int (Port.H.all), TCSANOW, Current'Address);
+
+ -- Block
+
+ Res := fcntl (int (Port.H.all), F_SETFL, (if Block then 0 else FNDELAY));
+
+ if Res = -1 then
+ Raise_Error ("set: fcntl failed");
+ end if;
+ end Set;
+
+ -----------
+ -- Write --
+ -----------
+
+ overriding procedure Write
+ (Port : in out Serial_Port;
+ Buffer : Stream_Element_Array)
+ is
+ Len : constant size_t := Buffer'Length;
+ Res : ssize_t;
+
+ begin
+ if Port.H = null then
+ Raise_Error ("write: port not opened", 0);
+ end if;
+
+ Res := write (int (Port.H.all), Buffer'Address, Len);
+
+ if Res = -1 then
+ Raise_Error ("write failed");
+ end if;
+
+ pragma Assert (size_t (Res) = Len);
+ end Write;
+
+ -----------
+ -- Close --
+ -----------
+
+ procedure Close (Port : in out Serial_Port) is
+ procedure Unchecked_Free is
+ new Unchecked_Deallocation (Port_Data, Port_Data_Access);
+
+ Res : int;
+ pragma Unreferenced (Res);
+
+ begin
+ if Port.H /= null then
+ Res := close (int (Port.H.all));
+ Unchecked_Free (Port.H);
+ end if;
+ end Close;
+
+end GNAT.Serial_Communications;