From 6a0c85760c655e490da7b9e764f0972b11bfef90 Mon Sep 17 00:00:00 2001
From: Bdale Garbee <bdale@gag.com>
Date: Mon, 29 Nov 2010 21:39:15 -0700
Subject: sources from initial AVR turn-on for TeleTerra

---
 avr/tmp/test_lcd.c | 167 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 167 insertions(+)
 create mode 100644 avr/tmp/test_lcd.c

(limited to 'avr/tmp/test_lcd.c')

diff --git a/avr/tmp/test_lcd.c b/avr/tmp/test_lcd.c
new file mode 100644
index 00000000..1f933b24
--- /dev/null
+++ b/avr/tmp/test_lcd.c
@@ -0,0 +1,167 @@
+/*************************************************************************
+Title:    testing output to a HD44780 based LCD display.
+Author:   Peter Fleury  <pfleury@gmx.ch>  http://jump.to/fleury
+File:     $Id: test_lcd.c,v 1.6 2004/12/10 13:53:59 peter Exp $
+Software: AVR-GCC 3.3
+Hardware: HD44780 compatible LCD text display
+          ATS90S8515/ATmega if memory-mapped LCD interface is used
+          any AVR with 7 free I/O pins if 4-bit IO port mode is used
+**************************************************************************/
+#include <stdlib.h>
+#include <avr/io.h>
+#include <avr/pgmspace.h>
+#include "lcd.h"
+
+
+/*
+** constant definitions
+*/
+static const PROGMEM unsigned char copyRightChar[] =
+{
+	0x07, 0x08, 0x13, 0x14, 0x14, 0x13, 0x08, 0x07,
+	0x00, 0x10, 0x08, 0x08, 0x08, 0x08, 0x10, 0x00
+};
+
+
+/*
+** function prototypes
+*/ 
+void wait_until_key_pressed(void);
+
+
+void wait_until_key_pressed(void)
+{
+    unsigned char temp1, temp2;
+    unsigned int i;
+    
+    do {
+        temp1 = PINC;                  // read input
+        for(i=0;i<65535;i++);
+        temp2 = PINC;                  // read input
+        temp1 = (temp1 & temp2);       // debounce input
+    } while ( temp1 & _BV(PINC4) );
+    
+    loop_until_bit_is_set(PINC,PINC4);            /* wait until key is released */
+}
+
+
+int main(void)
+{
+    char buffer[7];
+    int  num=134;
+    unsigned char i;
+    
+    
+    DDRD &=~ (1 << PC4);        /* Pin PC4 input              */
+    PORTD |= (1 << PC4);        /* Pin PC4 pull-up enabled    */
+
+
+    /* initialize display, cursor off */
+    lcd_init(LCD_DISP_ON);
+
+    for (;;) {                           /* loop forever */
+        /* 
+         * Test 1:  write text to display
+         */
+
+        /* clear display and home cursor */
+        lcd_clrscr();
+        
+        /* put string to display (line 1) with linefeed */
+        lcd_puts("LCD Test Line 1\n");
+
+        /* cursor is now on second line, write second line */
+        lcd_puts("Line 2");
+        
+        /* move cursor to position 8 on line 2 */
+        lcd_gotoxy(7,1);  
+        
+        /* write single char to display */
+        lcd_putc(':');
+        
+        /* wait until push button PD2 (INT0) is pressed */
+        wait_until_key_pressed();
+        
+        
+        /*
+         * Test 2: use lcd_command() to turn on cursor
+         */
+        
+        /* turn on cursor */
+        lcd_command(LCD_DISP_ON_CURSOR);
+
+        /* put string */
+        lcd_puts( "CurOn");
+        
+        /* wait until push button PD2 (INT0) is pressed */
+        wait_until_key_pressed();
+
+
+        /*
+         * Test 3: display shift
+         */
+        
+        lcd_clrscr();     /* clear display home cursor */
+
+        /* put string from program memory to display */
+        lcd_puts_P( "Line 1 longer than 14 characters\n" );
+        lcd_puts_P( "Line 2 longer than 14 characters" );
+        
+        /* move BOTH lines one position to the left */
+        lcd_command(LCD_MOVE_DISP_LEFT);
+        
+        /* wait until push button PD2 (INT0) is pressed */
+        wait_until_key_pressed();
+
+        /* turn off cursor */
+        lcd_command(LCD_DISP_ON);
+        
+        
+        /*
+         *   Test: Display integer values
+         */
+        
+        lcd_clrscr();   /* clear display home cursor */
+        
+        /* convert interger into string */
+        itoa( num , buffer, 10);
+        
+        /* put converted string to display */
+        lcd_puts(buffer);
+        
+        /* wait until push button PD2 (INT0) is pressed */
+        wait_until_key_pressed();
+        
+        
+        /*
+         *  Test: Display userdefined characters
+         */
+
+       lcd_clrscr();   /* clear display home cursor */
+       
+       lcd_puts("Copyright: ");
+       
+       /*
+        * load two userdefined characters from program memory
+        * into LCD controller CG RAM location 0 and 1
+        */
+       lcd_command(_BV(LCD_CGRAM));  /* set CG RAM start address 0 */
+       for(i=0; i<16; i++)
+       {
+           lcd_data(pgm_read_byte_near(&copyRightChar[i]));
+       }
+       
+       /* move cursor to position 0 on line 2 */
+       /* Note: this switched back to DD RAM adresses */
+       lcd_gotoxy(0,1);
+       
+       /* display user defined (c), built using two user defined chars */
+       lcd_putc(0);
+       lcd_putc(1);
+       
+
+       /* wait until push button PD2 (INT0) is pressed */
+       wait_until_key_pressed();
+              
+    }
+}
-- 
cgit v1.2.3