sources from initial AVR turn-on for TeleTerra

[fw/altos] / avr / tmp / test_lcd.c

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