main.cpp

00001 /*
00002  Hotboards_SpiLcd - TextDirection
00003  Demonstrates the use a 16x2 LCD display.  The Hotboards_SpiLcd
00004  library works with all LCD displays that are compatible with the
00005  ST7032 driver presented on Spi Lcd board (http://www.hotboards.org).
00006  This sketch demonstrates how to use leftToRight() and rightToLeft()
00007  to move the cursor.
00008  The circuit:
00009   *  BKL   -->  GND
00010   *  VDD   -->  3.3v
00011   *  GND   -->  GND
00012   *  SCK   -->  PA_5
00013   *  SI    -->  PA_6
00014   *  CS    -->  PB_15
00015   *  RS    -->  PB_14
00016   *  RST   -->  PB_13
00017  Library and example ported by Diego from Hotboards and originally created 
00018  by David A. Mellis
00019  library modified 5 Jul 2009
00020  by Limor Fried (http://www.ladyada.net)
00021  example added 9 Jul 2009
00022  by Tom Igoe
00023  modified 22 Nov 2010
00024  by Tom Igoe
00025 */
00026 #include "mbed.h"
00027 #include "Hotboards_SpiLcd.h"
00028 
00029 /* initialize an instance of SPI bus,setting the SPI pins*/
00030 SPI device(PA_7,PA_6,PA_5); /* SO, SI, SCK*/
00031 /* initialize the library with the numbers of the interface pins*/
00032 Hotboards_SpiLcd display( device, PB_15, PB_14, PB_13 ); /* SPI, CS, RS, RST */
00033 
00034 int thisChar = 'a';
00035 
00036 int main() 
00037 {
00038     /* set the spi frequency to 5MHz*/
00039     device.frequency(5000000);
00040     /* initialize internal lcd controller:*/
00041     display.init();
00042     // turn on the cursor:
00043     display.cursor();
00044     
00045     while(1) 
00046     {
00047       // reverse directions at 'm':
00048       if (thisChar == 'm') 
00049       {
00050        // go right for the next letter
00051        display.rightToLeft();
00052       }
00053       // reverse again at 's':
00054       if (thisChar == 's') 
00055       {
00056         // go left for the next letter
00057         display.leftToRight();
00058       }
00059       // reset at 'z':
00060       if (thisChar > 'z') 
00061       {
00062         // go to (0,0):
00063         display.home();
00064         // start again at 0
00065         thisChar = 'a';
00066       }
00067       // print the character
00068       display.printf("%c",thisChar);
00069       // wait a second:
00070       wait(1);
00071       // increment the letter:
00072       thisChar++;
00073     }
00074 }