WiringPi: Bring back all of the stuffs I removed to do with peripherals
Imported from the official WiringPi repository, version 2.60.
Signed-off-by: Deokgyu Yang <secugyu@gmail.com>
Change-Id: I82dc00ab9f038f9bc4c6a9c4ca3affe5a5d33ae1
diff --git a/examples/lcd-adafruit.c b/examples/lcd-adafruit.c
new file mode 100644
index 0000000..47c9b9b
--- /dev/null
+++ b/examples/lcd-adafruit.c
@@ -0,0 +1,347 @@
+/*
+ * lcd-adafruit.c:
+ * Text-based LCD driver test code
+ * This is designed to drive the Adafruit RGB LCD Plate
+ * with the additional 5 buttons for the Raspberry Pi
+ *
+ * Copyright (c) 2012-2013 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 <http://www.gnu.org/licenses/>.
+ ***********************************************************************
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <time.h>
+
+#include <wiringPi.h>
+#include <mcp23017.h>
+#include <lcd.h>
+
+#ifndef TRUE
+# define TRUE (1==1)
+# define FALSE (1==2)
+#endif
+
+
+// Defines for the Adafruit Pi LCD interface board
+
+#define AF_BASE 100
+#define AF_RED (AF_BASE + 6)
+#define AF_GREEN (AF_BASE + 7)
+#define AF_BLUE (AF_BASE + 8)
+
+#define AF_E (AF_BASE + 13)
+#define AF_RW (AF_BASE + 14)
+#define AF_RS (AF_BASE + 15)
+
+#define AF_DB4 (AF_BASE + 12)
+#define AF_DB5 (AF_BASE + 11)
+#define AF_DB6 (AF_BASE + 10)
+#define AF_DB7 (AF_BASE + 9)
+
+#define AF_SELECT (AF_BASE + 0)
+#define AF_RIGHT (AF_BASE + 1)
+#define AF_DOWN (AF_BASE + 2)
+#define AF_UP (AF_BASE + 3)
+#define AF_LEFT (AF_BASE + 4)
+
+
+// User-Defined character test
+
+static unsigned char newChar [8] =
+{
+ 0b00100,
+ 0b00100,
+ 0b00000,
+ 0b00100,
+ 0b01110,
+ 0b11011,
+ 0b11011,
+ 0b10001,
+} ;
+
+// Global lcd handle:
+
+static int lcdHandle ;
+
+/*
+ * usage:
+ *********************************************************************************
+ */
+
+int usage (const char *progName)
+{
+ fprintf (stderr, "Usage: %s colour\n", progName) ;
+ return EXIT_FAILURE ;
+}
+
+
+/*
+ * scrollMessage:
+ *********************************************************************************
+ */
+
+static const char *message =
+ " "
+ "Wiring Pi by Gordon Henderson. HTTP://WIRINGPI.COM/"
+ " " ;
+
+void scrollMessage (int line, int width)
+{
+ char buf [32] ;
+ static int position = 0 ;
+ static int timer = 0 ;
+
+ if (millis () < timer)
+ return ;
+
+ timer = millis () + 200 ;
+
+ strncpy (buf, &message [position], width) ;
+ buf [width] = 0 ;
+ lcdPosition (lcdHandle, 0, line) ;
+ lcdPuts (lcdHandle, buf) ;
+
+ if (++position == (strlen (message) - width))
+ position = 0 ;
+}
+
+
+/*
+ * setBacklightColour:
+ * The colour outputs are inverted.
+ *********************************************************************************
+ */
+
+static void setBacklightColour (int colour)
+{
+ colour &= 7 ;
+
+ digitalWrite (AF_RED, !(colour & 1)) ;
+ digitalWrite (AF_GREEN, !(colour & 2)) ;
+ digitalWrite (AF_BLUE, !(colour & 4)) ;
+}
+
+
+/*
+ * adafruitLCDSetup:
+ * Setup the Adafruit board by making sure the additional pins are
+ * set to the correct modes, etc.
+ *********************************************************************************
+ */
+
+static void adafruitLCDSetup (int colour)
+{
+ int i ;
+
+// Backlight LEDs
+
+ pinMode (AF_RED, OUTPUT) ;
+ pinMode (AF_GREEN, OUTPUT) ;
+ pinMode (AF_BLUE, OUTPUT) ;
+ setBacklightColour (colour) ;
+
+// Input buttons
+
+ for (i = 0 ; i <= 4 ; ++i)
+ {
+ pinMode (AF_BASE + i, INPUT) ;
+ pullUpDnControl (AF_BASE + i, PUD_UP) ; // Enable pull-ups, switches close to 0v
+ }
+
+// Control signals
+
+ pinMode (AF_RW, OUTPUT) ; digitalWrite (AF_RW, LOW) ; // Not used with wiringPi - always in write mode
+
+// The other control pins are initialised with lcdInit ()
+
+ lcdHandle = lcdInit (2, 16, 4, AF_RS, AF_E, AF_DB4,AF_DB5,AF_DB6,AF_DB7, 0,0,0,0) ;
+
+ if (lcdHandle < 0)
+ {
+ fprintf (stderr, "lcdInit failed\n") ;
+ exit (EXIT_FAILURE) ;
+ }
+}
+
+
+/*
+ * waitForEnter:
+ * On the Adafruit display, wait for the select button
+ *********************************************************************************
+ */
+
+static void waitForEnter (void)
+{
+ printf ("Press SELECT to continue: ") ; fflush (stdout) ;
+
+ while (digitalRead (AF_SELECT) == HIGH) // Wait for push
+ delay (1) ;
+
+ while (digitalRead (AF_SELECT) == LOW) // Wait for release
+ delay (1) ;
+
+ printf ("OK\n") ;
+}
+
+
+/*
+ * speedTest:
+ * Test the update speed of the display
+ *********************************************************************************
+ */
+
+static void speedTest (void)
+{
+ unsigned int start, end, taken ;
+ int times ;
+
+ lcdClear (lcdHandle) ;
+ start = millis () ;
+ for (times = 0 ; times < 10 ; ++times)
+ {
+ lcdPuts (lcdHandle, "0123456789ABCDEF") ;
+ lcdPuts (lcdHandle, "0123456789ABCDEF") ;
+ }
+ end = millis () ;
+ taken = (end - start) / 10;
+
+ lcdClear (lcdHandle) ;
+ lcdPosition (lcdHandle, 0, 0) ; lcdPrintf (lcdHandle, "Speed: %dmS", taken) ;
+ lcdPosition (lcdHandle, 0, 1) ; lcdPrintf (lcdHandle, "For full update") ;
+
+ waitForEnter () ;
+
+ lcdClear (lcdHandle) ;
+ lcdPosition (lcdHandle, 0, 0) ; lcdPrintf (lcdHandle, "Time: %dmS", taken / 32) ;
+ lcdPosition (lcdHandle, 0, 1) ; lcdPrintf (lcdHandle, "Per character") ;
+
+ waitForEnter () ;
+
+ lcdClear (lcdHandle) ;
+ lcdPosition (lcdHandle, 0, 0) ; lcdPrintf (lcdHandle, "%d cps...", 32000 / taken) ;
+
+ waitForEnter () ;
+}
+
+
+/*
+ * The works
+ *********************************************************************************
+ */
+
+int main (int argc, char *argv[])
+{
+ int colour ;
+ int cols = 16 ;
+ int waitForRelease = FALSE ;
+
+ struct tm *t ;
+ time_t tim ;
+
+ char buf [32] ;
+
+ if (argc != 2)
+ return usage (argv [0]) ;
+
+ printf ("Raspberry Pi Adafruit LCD test\n") ;
+ printf ("==============================\n") ;
+
+ colour = atoi (argv [1]) ;
+
+ wiringPiSetupSys () ;
+ mcp23017Setup (AF_BASE, 0x20) ;
+
+ adafruitLCDSetup (colour) ;
+
+ lcdPosition (lcdHandle, 0, 0) ; lcdPuts (lcdHandle, "Gordon Henderson") ;
+ lcdPosition (lcdHandle, 0, 1) ; lcdPuts (lcdHandle, " wiringpi.com ") ;
+
+ waitForEnter () ;
+
+ lcdPosition (lcdHandle, 0, 1) ; lcdPuts (lcdHandle, "Adafruit RGB LCD") ;
+
+ waitForEnter () ;
+
+ lcdCharDef (lcdHandle, 2, newChar) ;
+
+ lcdClear (lcdHandle) ;
+ lcdPosition (lcdHandle, 0, 0) ;
+ lcdPuts (lcdHandle, "User Char: ") ;
+ lcdPutchar (lcdHandle, 2) ;
+
+ lcdCursor (lcdHandle, TRUE) ;
+ lcdCursorBlink (lcdHandle, TRUE) ;
+
+ waitForEnter () ;
+
+ lcdCursor (lcdHandle, FALSE) ;
+ lcdCursorBlink (lcdHandle, FALSE) ;
+
+ speedTest () ;
+
+ lcdClear (lcdHandle) ;
+
+ for (;;)
+ {
+ scrollMessage (0, cols) ;
+
+ tim = time (NULL) ;
+ t = localtime (&tim) ;
+
+ sprintf (buf, "%02d:%02d:%02d", t->tm_hour, t->tm_min, t->tm_sec) ;
+
+ lcdPosition (lcdHandle, (cols - 8) / 2, 1) ;
+ lcdPuts (lcdHandle, buf) ;
+
+// Check buttons to cycle colour
+
+// If Up or Down are still pushed, then skip
+
+ if (waitForRelease)
+ {
+ if ((digitalRead (AF_UP) == LOW) || (digitalRead (AF_DOWN) == LOW))
+ continue ;
+ else
+ waitForRelease = FALSE ;
+ }
+
+ if (digitalRead (AF_UP) == LOW) // Pushed
+ {
+ colour = colour + 1 ;
+ if (colour == 8)
+ colour = 0 ;
+ setBacklightColour (colour) ;
+ waitForRelease = TRUE ;
+ }
+
+ if (digitalRead (AF_DOWN) == LOW) // Pushed
+ {
+ colour = colour - 1 ;
+ if (colour == -1)
+ colour = 7 ;
+ setBacklightColour (colour) ;
+ waitForRelease = TRUE ;
+ }
+
+ }
+
+ return 0 ;
+}