/* * scphat.c: * Little program to allow use of the Pimoroni Sctoll Phat * from the command-line. * * Copyright (c) 2015-2016 Gordon Henderson. *********************************************************************** * This file is part of wiringPi: * https://projects.drogon.net/raspberry-pi/wiringpi/ * * wiringPi is free software: you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * wiringPi is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with wiringPi. If not, see . *********************************************************************** */ #include #include #include #include #include #include static char *progName ; /* * checkArgs: * Count the arguments for each little function ********************************************************************************* */ static void checkArgs (char *command, int num, int arg, int argc) { if ((arg + num) < argc) return ; fprintf (stderr, "%s: Not enough data for %s command.\n", progName, command) ; exit (EXIT_FAILURE) ; } /* * doClear: * Clear the display ********************************************************************************* */ static int doClear (void) { scrollPhatClear () ; return 1 ; } /* * doBright ********************************************************************************* */ static int doBright (int arg, int argc, char *argv []) { checkArgs ("bright", 1, arg, argc) ; scrollPhatIntensity (atoi (argv [arg+1])) ; return 2 ; } /* * doPlot ********************************************************************************* */ static int doPlot (int arg, int argc, char *argv []) { checkArgs ("plot", 2, arg, argc) ; scrollPhatPoint (atoi (argv [arg+1]), atoi (argv [arg+2]), 1) ; scrollPhatUpdate () ; return 3 ; } /* * doLine ********************************************************************************* */ static int doLine (int arg, int argc, char *argv []) { checkArgs ("line", 4, arg, argc) ; scrollPhatLine (atoi (argv [arg+1]), atoi (argv [arg+2]), atoi (argv [arg+3]), atoi (argv [arg+4]), 1) ; scrollPhatUpdate () ; return 5 ; } /* * doLineTo ********************************************************************************* */ static int doLineTo (int arg, int argc, char *argv []) { checkArgs ("lineto", 2, arg, argc) ; scrollPhatLineTo (atoi (argv [arg+1]), atoi (argv [arg+2]), 1) ; scrollPhatUpdate () ; return 3 ; } /* * doWait ********************************************************************************* */ static int doWait (int arg, int argc, char *argv []) { checkArgs ("wait", 1, arg, argc) ; delay (atoi (argv [arg+1]) * 100) ; scrollPhatUpdate () ; return 2 ; } /* * doSpeed ********************************************************************************* */ static int doSpeed (int arg, int argc, char *argv []) { checkArgs ("speed", 1, arg, argc) ; scrollPhatPrintSpeed (atoi (argv [arg+1])) ; return 2 ; } /* * doScroll ********************************************************************************* */ static int doScroll (int arg, int argc, char *argv []) { checkArgs ("scroll", 1, arg, argc) ; scrollPhatPuts (argv [arg+1]) ; return 2 ; } static void failUsage (void) { fprintf (stderr, "Usage: %s command [paremters] ...\n", progName) ; fprintf (stderr, " commands:\n") ; fprintf (stderr, " clear/cls - Clear the display\n") ; fprintf (stderr, " bright N - Set display brightness; 1-100\n") ; fprintf (stderr, " plot X Y - Set a single pixel at location X Y; 0-10, 0-4\n") ; fprintf (stderr, " line X1 Y1 X2 Y2 - Draw a line from the 2 points\n") ; fprintf (stderr, " lineto X2 Y2 - Draw a line from the last point to the new one\n") ; fprintf (stderr, " wait/delay N - Wait for N 10ths seconds\n") ; fprintf (stderr, " speed N - Set scrolling speed (cps)\n") ; fprintf (stderr, " scroll S - Scroll the given string\n") ; fprintf (stderr, "\n") ; fprintf (stderr, " Example: %s plot 0 0 wait 50 scroll \" Hello \"\n", progName) ; exit (EXIT_FAILURE) ; } /* * the works ********************************************************************************* */ int main (int argc, char *argv []) { int arg = 1 ; char *command ; progName = argv [0] ; wiringPiSetupSys () ; if (scrollPhatSetup () != 0) { fprintf (stderr, "%s: Unable to initialise the scrollPhat: %s\n", progName, strerror (errno)) ; exit (EXIT_FAILURE) ; } progName = argv [0] ; if (argc < 2) { fprintf (stderr, "%s: Nothing to do...\n", argv [0]) ; failUsage () ; } while (arg != argc) { command = argv [arg] ; /**/ if (strcasecmp (command, "clear") == 0) arg += doClear () ; else if (strcasecmp (command, "cls") == 0) arg += doClear () ; else if (strcasecmp (command, "bright") == 0) arg += doBright (arg, argc, argv) ; else if (strcasecmp (command, "plot") == 0) arg += doPlot (arg, argc, argv) ; else if (strcasecmp (command, "line") == 0) arg += doLine (arg, argc, argv) ; else if (strcasecmp (command, "lineto") == 0) arg += doLineTo (arg, argc, argv) ; else if (strcasecmp (command, "wait") == 0) arg += doWait (arg, argc, argv) ; else if (strcasecmp (command, "delay") == 0) arg += doWait (arg, argc, argv) ; else if (strcasecmp (command, "speed") == 0) arg += doSpeed (arg, argc, argv) ; else if (strcasecmp (command, "scroll") == 0) arg += doScroll (arg, argc, argv) ; else { fprintf (stderr, "%s: Unknown command: %s.\n", argv [0], argv [arg]) ; failUsage () ; } } return 0 ; }