* This is designed to drive the parallel interface LCD drivers
* based in the Hitachi HD44780U controller and compatables.
*
- * Copyright (c) 2012 Gordon Henderson.
+ * This test program assumes the following:
+ *
+ * 8-bit displays:
+ * GPIO 0-7 is connected to display data pins 0-7.
+ * GPIO 11 is the RS pin.
+ * GPIO 10 is the Strobe/E pin.
+ *
+ * For 4-bit interface:
+ * GPIO 4-7 is connected to display data pins 4-7.
+ * GPIO 11 is the RS pin.
+ * GPIO 10 is the Strobe/E pin.
+ *
+ * Copyright (c) 2012-2013 Gordon Henderson.
***********************************************************************
* This file is part of wiringPi:
* https://projects.drogon.net/raspberry-pi/wiringpi/
#include <wiringPi.h>
#include <lcd.h>
-int main (void)
+#ifndef TRUE
+# define TRUE (1==1)
+# define FALSE (1==2)
+#endif
+
+static unsigned char newChar [8] =
{
- int i, j ;
- int fd1, fd2 ;
+ 0b11111,
+ 0b10001,
+ 0b10001,
+ 0b10101,
+ 0b11111,
+ 0b10001,
+ 0b10001,
+ 0b11111,
+} ;
+
+
+int usage (const char *progName)
+{
+ fprintf (stderr, "Usage: %s bits cols rows\n", progName) ;
+ return EXIT_FAILURE ;
+}
+
+static const char *message =
+ " "
+ "Wiring Pi by Gordon Henderson. HTTP://WIRINGPI.COM/"
+ " " ;
+
+void scrollMessage (int lcd, int line, int width)
+{
+ char buf [32] ;
+ static int position = 0 ;
+
+ strncpy (buf, &message [position], width) ;
+ buf [width] = 0 ;
+ lcdPosition (lcd, 0, line) ;
+ lcdPuts (lcd, buf) ;
+
+ if (++position == (strlen (message) - width))
+ position = 0 ;
+}
+
+static void pingPong (int lcd, int cols)
+{
+ static int position = 0 ;
+ static int dir = 0 ;
+
+ if (dir == 0) // Setup
+ {
+ dir = 1 ;
+ lcdPosition (lcd, 0, 3) ;
+ lcdPutchar (lcd, '*') ;
+ return ;
+ }
- char message1 [256] ;
- char message2 [256] ;
- char buf1 [30] ;
- char buf2 [30] ;
+ lcdPosition (lcd, position, 3) ;
+ lcdPutchar (lcd, ' ') ;
+ position += dir ;
+
+ if (position == cols)
+ {
+ dir = -1 ;
+ --position ;
+ }
+
+ if (position < 0)
+ {
+ dir = 1 ;
+ ++position ;
+ }
+
+ lcdPosition (lcd, position, 3) ;
+ lcdPutchar (lcd, '#') ;
+}
+
+
+
+static void waitForEnter (void)
+{
+ printf ("Press ENTER to continue: ") ;
+ (void)fgetc (stdin) ;
+}
+
+int main (int argc, char *argv[])
+{
+ int i ;
+ int lcd ;
+ int bits, rows, cols ;
struct tm *t ;
time_t tim ;
- printf ("Raspberry Pi LCD test program\n") ;
+ char buf [32] ;
- if (wiringPiSetup () == -1)
- exit (1) ;
+ if (argc != 4)
+ return usage (argv [0]) ;
- fd1 = lcdInit (4, 20, 4, 8, 9, 4,5,6,7,0,0,0,0) ;
- fd2 = lcdInit (2, 16, 4, 8, 10, 4,5,6,7,0,0,0,0) ;
+ printf ("Raspberry Pi LCD test\n") ;
+ printf ("=====================\n") ;
-//fd1 = lcdInit (4, 20, 8, 8, 9, 0,1,2,3,4,5,6,7) ;
-//fd2 = lcdInit (2, 16, 8, 8, 10, 0,1,2,3,4,5,6,7) ;
+ bits = atoi (argv [1]) ;
+ cols = atoi (argv [2]) ;
+ rows = atoi (argv [3]) ;
- if (fd1 == -1)
+ if (!((rows == 1) || (rows == 2) || (rows == 4)))
{
- printf ("lcdInit 1 failed\n") ;
- return 1 ;
+ fprintf (stderr, "%s: rows must be 1, 2 or 4\n", argv [0]) ;
+ return EXIT_FAILURE ;
}
- if (fd2 == -1)
+ if (!((cols == 16) || (cols == 20)))
{
- printf ("lcdInit 2 failed\n") ;
- return 1 ;
+ fprintf (stderr, "%s: cols must be 16 or 20\n", argv [0]) ;
+ return EXIT_FAILURE ;
}
- sleep (1) ;
+ wiringPiSetup () ;
- lcdPosition (fd1, 0, 0) ; lcdPuts (fd1, " Gordon Henderson") ;
- lcdPosition (fd1, 0, 1) ; lcdPuts (fd1, " --------------") ;
-/*
- lcdPosition (fd1, 0, 2) ; lcdPuts (fd1, " 00:00:00") ;
- lcdPosition (fd1, 0, 3) ; lcdPuts (fd1, " DD:MM:YY") ;
-*/
+ if (bits == 4)
+ lcd = lcdInit (rows, cols, 4, 11,10, 4,5,6,7,0,0,0,0) ;
+ else
+ lcd = lcdInit (rows, cols, 8, 11,10, 0,1,2,3,4,5,6,7) ;
+
+ if (lcd < 0)
+ {
+ fprintf (stderr, "%s: lcdInit failed\n", argv [0]) ;
+ return -1 ;
+ }
+
+ lcdPosition (lcd, 0, 0) ; lcdPuts (lcd, "Gordon Henderson") ;
- lcdPosition (fd2, 0, 0) ; lcdPuts (fd2, "Gordon Henderson") ;
- lcdPosition (fd2, 0, 1) ; lcdPuts (fd2, "----------------") ;
+ if (rows > 1)
+ {
+ lcdPosition (lcd, 0, 1) ;
+ for (i = 0 ; i < (cols - 1) ; ++i)
+ lcdPutchar (lcd, '*') ;
+ lcdPutchar (lcd, '2') ;
+
+ if (rows == 4)
+ {
+ lcdPosition (lcd, 0, 2) ;
+ for (i = 0 ; i < ((cols - 1) / 2) ; ++i)
+ lcdPuts (lcd, "=-") ;
+ lcdPuts (lcd, "=3") ;
+
+ lcdPosition (lcd, 0, 3) ;
+ for (i = 0 ; i < ((cols - 1) / 2) ; ++i)
+ lcdPuts (lcd, "-=") ;
+ lcdPuts (lcd, "-4") ;
+ }
+ }
sleep (2) ;
- sprintf (message1, "%s", " http://projects.drogon.net/ ") ;
- sprintf (message2, "%s", " This is a long message to go into the smaller display just for a demonstration of what we can do. ") ;
+ lcdPosition (lcd, 0, 0) ; lcdPuts (lcd, " wiringpi.com ") ;
+
+
+ waitForEnter () ;
+
+ lcdCharDef (lcd, 2, newChar) ;
+
+ lcdClear (lcd) ;
+ lcdPosition (lcd, 0, 0) ;
+ lcdPuts (lcd, "User Char: ") ;
+ lcdPutchar (lcd, 2) ;
+
+ lcdCursor (lcd, TRUE) ;
+ lcdCursorBlink (lcd, TRUE) ;
+
+ waitForEnter () ;
+
+ lcdCursor (lcd, FALSE) ;
+ lcdCursorBlink (lcd, FALSE) ;
+
for (;;)
{
- i = 0 ;
- j = 0 ;
- for (;;)
- {
- strncpy (buf1, &message1 [i], 20) ;
- buf1 [20] = 0 ;
- lcdPosition (fd1, 0, 1) ;
- lcdPuts (fd1, buf1) ;
- ++i ;
- if (i == strlen (message1) - 20)
- i = 0 ;
-
- strncpy (buf2, &message2 [j], 16) ;
- buf2 [16] = 0 ;
- lcdPosition (fd2, 0, 1) ;
- lcdPuts (fd2, buf2) ;
- ++j ;
- if (j == strlen (message2) - 16)
- j = 0 ;
-
- tim = time (NULL) ;
- t = localtime (&tim) ;
-
- sprintf (buf1, "%02d:%02d:%02d", t->tm_hour, t->tm_min, t->tm_sec) ;
- lcdPosition (fd1, 5, 2) ;
- lcdPuts (fd1, buf1) ;
-
- sprintf (buf1, "%02d/%02d/%02d", t->tm_mday, t->tm_mon + 1, t->tm_year+1900) ;
- lcdPosition (fd1, 4, 3) ;
- lcdPuts (fd1, buf1) ;
-
- delay (250) ;
- }
+ delay (250) ;
+
+ scrollMessage (lcd, 0, cols) ;
+
+ if (rows == 1)
+ continue ;
+
+ tim = time (NULL) ;
+ t = localtime (&tim) ;
+
+ sprintf (buf, "%02d:%02d:%02d", t->tm_hour, t->tm_min, t->tm_sec) ;
+
+ lcdPosition (lcd, (cols - 8) / 2, 1) ;
+ lcdPuts (lcd, buf) ;
+
+ if (rows == 2)
+ continue ;
+
+ sprintf (buf, "%02d/%02d/%04d", t->tm_mday, t->tm_mon + 1, t->tm_year+1900) ;
+
+ lcdPosition (lcd, (cols - 10) / 2, 2) ;
+ lcdPuts (lcd, buf) ;
+
+ pingPong (lcd, cols) ;
}
return 0 ;
~ianmdlvl / wiringPi.git / blobdiff