Merge commit '474f163b53d438955dae1a0cc9d7df46344b3950' as 'Code/devterm_wiringpi_cpi'

Code/devterm_wiringpi_cpi/examples/scrollPhat/scphat.c

@@ -0,0 +1,230 @@
+/*
+ * scphat.c:
+ *	Little program to allow use of the Pimoroni Sctoll Phat
+ *	from the command-line.
+ *
+ * Copyright (c) 2015-2016 Gordon Henderson. <projects@drogon.net>
+ ***********************************************************************
+ * 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 <http://www.gnu.org/licenses/>.
+ ***********************************************************************
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+
+#include <wiringPi.h>
+#include <scrollPhat.h>
+
+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 ;
+}