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https://github.com/netfun2000/lcd4linux.git
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9dc6ff97fe
added 'section' argument to cfg_get(), but NULLed it on all calls by now. git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@298 3ae390bd-cb1e-0410-b409-cd5a39f66f1f
388 lines
8.4 KiB
C
388 lines
8.4 KiB
C
/* $Id: MilfordInstruments.c,v 1.5 2004/01/09 04:16:06 reinelt Exp $
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*
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* driver for Milford Instruments 'BPK' piggy-back serial interface board
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* for standard Hitachi 44780 compatible lcd modules.
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*
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* Copyright 2003 Andy Baxter <andy@earthsong.free-online.co.uk>
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*
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* based on the MatrixOrbital driver which is
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* Copyright 1999, 2000 Michael Reinelt <reinelt@eunet.at>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*
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* $Log: MilfordInstruments.c,v $
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* Revision 1.5 2004/01/09 04:16:06 reinelt
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* added 'section' argument to cfg_get(), but NULLed it on all calls by now.
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*
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* Revision 1.4 2004/01/06 22:33:13 reinelt
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* Copyright statements cleaned up
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*
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* Revision 1.3 2003/10/08 13:39:53 andy-b
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* Cleaned up code in MilfordInstruments.c, and added descriptions for other display sizes (untested)
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*
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* Revision 1.1 2003/09/29 06:58:36 reinelt
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* new driver for Milford Instruments MI420 by Andy Baxter
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*
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*/
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/*
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*
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* exported fuctions:
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*
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* struct LCD MilfordInstruments[]
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*
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <unistd.h>
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#include <termios.h>
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#include <fcntl.h>
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#include "debug.h"
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#include "cfg.h"
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#include "lock.h"
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#include "display.h"
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#include "bar.h"
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#include "icon.h"
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#define XRES 5
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#define YRES 8
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#define CHARS 8
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static LCD Lcd;
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static char *Port=NULL;
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static speed_t Speed;
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static int Device=-1;
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static int Icons;
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static char *FrameBuffer1=NULL;
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static char *FrameBuffer2=NULL;
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static int MI_open (void)
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{
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int fd;
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pid_t pid;
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struct termios portset;
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if ((pid=lock_port(Port))!=0) {
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if (pid==-1)
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error ("MilfordInstruments: port %s could not be locked", Port);
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else
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error ("MilfordInstruments: port %s is locked by process %d", Port, pid);
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return -1;
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}
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fd = open(Port, O_RDWR | O_NOCTTY | O_NDELAY);
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if (fd==-1) {
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error ("MilfordInstruments: open(%s) failed: %s", Port, strerror(errno));
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unlock_port(Port);
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return -1;
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}
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if (tcgetattr(fd, &portset)==-1) {
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error ("MilfordInstruments: tcgetattr(%s) failed: %s", Port, strerror(errno));
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unlock_port(Port);
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return -1;
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}
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cfmakeraw(&portset);
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cfsetospeed(&portset, Speed);
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if (tcsetattr(fd, TCSANOW, &portset)==-1) {
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error ("MilfordInstruments: tcsetattr(%s) failed: %s", Port, strerror(errno));
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unlock_port(Port);
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return -1;
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}
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return fd;
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}
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static void MI_write (char *string, int len)
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{
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if (Device==-1) return;
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if (write (Device, string, len)==-1) {
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if (errno==EAGAIN) {
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usleep(1000);
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if (write (Device, string, len)>=0) return;
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}
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error ("MilfordInstruments: write(%s) failed: %s", Port, strerror(errno));
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}
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}
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static void MI_define_char (int ascii, char *buffer)
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{
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char cmd[2]="\376x";
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if (ascii<8) {
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cmd[1]=(char)(64+ascii*8);
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MI_write (cmd, 2);
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MI_write (buffer, 8);
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}
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}
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static int MI_clear (int full)
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{
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memset (FrameBuffer1, ' ', Lcd.rows*Lcd.cols*sizeof(char));
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icon_clear();
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bar_clear();
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if (full) {
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memset (FrameBuffer2, ' ', Lcd.rows*Lcd.cols*sizeof(char));
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MI_write ("\376\001", 2); // clear screen
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}
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return 0;
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}
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static int MI_init (LCD *Self)
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{
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char *port;
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int speed;
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Lcd=*Self;
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// Init the framebuffers
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FrameBuffer1 = (char*)malloc(Lcd.cols*Lcd.rows*sizeof(char));
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FrameBuffer2 = (char*)malloc(Lcd.cols*Lcd.rows*sizeof(char));
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if (FrameBuffer1==NULL || FrameBuffer2==NULL) {
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error ("MilfordInstruments: framebuffer could not be allocated: malloc() failed");
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return -1;
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}
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if (Port) {
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free (Port);
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Port=NULL;
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}
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port=cfg_get (NULL, "Port", NULL);
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if (port==NULL || *port=='\0') {
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error ("MilfordInstruments: no 'Port' entry in %s", cfg_source());
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return -1;
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}
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Port=strdup(port);
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if (cfg_number(NULL, "Speed", 19200, 1200,19200, &speed)<0) return -1;
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switch (speed) {
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case 2400:
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Speed=B2400;
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break;
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case 9600:
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Speed=B9600;
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break;
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default:
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error ("MilfordInstruments: unsupported speed '%d' in %s", speed, cfg_source());
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return -1;
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}
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debug ("using port %s at %d baud", Port, speed);
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Device=MI_open();
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if (Device==-1) return -1;
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if (cfg_number(NULL, "Icons", 0, 0, CHARS, &Icons)<0) return -1;
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if (Icons>0) {
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debug ("reserving %d of %d user-defined characters for icons", Icons, CHARS);
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icon_init(Lcd.rows, Lcd.cols, XRES, YRES, CHARS, Icons, MI_define_char);
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Self->icons=Icons;
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Lcd.icons=Icons;
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}
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bar_init(Lcd.rows, Lcd.cols, XRES, YRES, CHARS-Icons);
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bar_add_segment( 0, 0,255, 32); // ASCII 32 = blank
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bar_add_segment(255,255,255,255); // ASCII 255 = block
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MI_clear(1);
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MI_write ("\376\014", 2); // cursor off
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return 0;
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}
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void MI_goto (int row, int col)
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{
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char cmd[2]="\376x";
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char ddbase=128;
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if (row & 1) { // i.e. if row is 1 or 3
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ddbase += 64;
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};
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if (row & 2) { // i.e. if row is 0 or 2.
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ddbase += 20;
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};
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cmd[1]=(char)(ddbase+col);
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MI_write(cmd,2);
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}
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int MI_put (int row, int col, char *text)
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{
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char *p=FrameBuffer1+row*Lcd.cols+col;
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char *t=text;
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while (*t && col++<=Lcd.cols) {
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*p++=*t++;
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}
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return 0;
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}
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int MI_bar (int type, int row, int col, int max, int len1, int len2)
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{
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return bar_draw (type, row, col, max, len1, len2);
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}
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int MI_icon (int num, int seq, int row, int col)
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{
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return icon_draw (num, seq, row, col);
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}
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static int MI_flush (void)
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{
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int row, col, pos1, pos2;
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int c, equal;
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bar_process(MI_define_char);
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for (row=0; row<Lcd.rows; row++) {
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for (col=0; col<Lcd.cols; col++) {
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c=bar_peek(row, col);
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if (c==-1) c=icon_peek(row, col);
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if (c!=-1) {
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FrameBuffer1[row*Lcd.cols+col]=(char)c;
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}
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}
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for (col=0; col<Lcd.cols; col++) {
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if (FrameBuffer1[row*Lcd.cols+col]==FrameBuffer2[row*Lcd.cols+col]) continue;
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MI_goto (row, col);
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for (pos1=col++, pos2=pos1, equal=0; col<Lcd.cols; col++) {
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if (FrameBuffer1[row*Lcd.cols+col]==FrameBuffer2[row*Lcd.cols+col]) {
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// If we find just one equal byte, we don't break, because this
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// would require a goto, which takes one byte, too.
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if (++equal>5) break;
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} else {
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pos2=col;
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equal=0;
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}
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}
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MI_write (FrameBuffer1+row*Lcd.cols+pos1, pos2-pos1+1);
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}
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}
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memcpy (FrameBuffer2, FrameBuffer1, Lcd.rows*Lcd.cols*sizeof(char));
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return 0;
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}
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int MI_quit (void)
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{
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info("MilfordInstruments: shutting down.");
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debug ("closing port %s", Port);
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close (Device);
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unlock_port(Port);
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if (FrameBuffer1) {
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free(FrameBuffer1);
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FrameBuffer1=NULL;
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}
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if (FrameBuffer2) {
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free(FrameBuffer2);
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FrameBuffer2=NULL;
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}
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return (0);
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}
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LCD MilfordInstruments[] = {
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{ name: "MI216",
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rows: 2,
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cols: 16,
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xres: XRES,
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yres: YRES,
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bars: BAR_L | BAR_R | BAR_U | BAR_D | BAR_H2,
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icons: 0,
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gpos: 0,
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init: MI_init,
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clear: MI_clear,
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put: MI_put,
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bar: MI_bar,
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icon: MI_icon,
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gpo: NULL,
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flush: MI_flush,
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quit: MI_quit
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},
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{ name: "MI220",
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rows: 2,
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cols: 20,
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xres: XRES,
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yres: YRES,
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bars: BAR_L | BAR_R | BAR_U | BAR_D | BAR_H2,
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icons: 0,
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gpos: 0,
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init: MI_init,
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clear: MI_clear,
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put: MI_put,
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bar: MI_bar,
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icon: MI_icon,
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gpo: NULL,
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flush: MI_flush,
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quit: MI_quit
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},
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{ name: "MI240",
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rows: 2,
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cols: 40,
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xres: XRES,
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yres: YRES,
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bars: BAR_L | BAR_R | BAR_U | BAR_D | BAR_H2,
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icons: 0,
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gpos: 0,
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init: MI_init,
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clear: MI_clear,
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put: MI_put,
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bar: MI_bar,
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icon: MI_icon,
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gpo: NULL,
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flush: MI_flush,
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quit: MI_quit
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},
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{ name: "MI420",
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rows: 4,
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cols: 20,
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xres: XRES,
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yres: YRES,
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bars: BAR_L | BAR_R | BAR_U | BAR_D | BAR_H2,
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icons: 0,
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gpos: 0,
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init: MI_init,
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clear: MI_clear,
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put: MI_put,
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bar: MI_bar,
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icon: MI_icon,
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gpo: NULL,
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flush: MI_flush,
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quit: MI_quit
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},
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{ NULL }
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};
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