readme.txt

430LCD使用

whats this?
-----------
its a simple example project for the MSP430 series MCU and the GCC port
of the mspgcc project. the project contains a makefile and uses assembler
and C sources. it shows a clock on an character LCD.

this example shows the following features:
 - how to use a character LCD.
    o download font with custom characters
    o it contains a reusable LCD C-module

 - how to use (wakeup) interrupts in C
    o sync foreground with interrupt by using the lowpower modes
 
 - use uprintf to print formated strings and do a printf
   emulation that prints to the LCD.
 
 - using the Timer_A as realtime clock
 
 - makefile
    o compile and link
    o convert to intel hex format
    o generate a listing with mixed C / assembly

required hardware
-----------------

 - a MSP430F1121 or larger device (any from the F1x series)
 
 - any character type display with a HD44780 controler or compatible
  (e.g. a KS0066 16x2 type was used for developement)
  connections for a four bit interface (LCD->MSP):
      RS  -> P1.1
      R/W -> P1.2
      E   -> P1.3
      D4  -> P1.4
      D5  -> P1.5
      D6  -> P1.6
      D7  -> P1.7
  many LCD controllers run from 3 volts, but the display requires a
  voltage difference of more than 3 volts for the contrast. this means
  a negative voltage is needed on the contrast pin (usualy named VEE or
  VO)
  
 - watch crystal 32.768kHz
 
 - optionaly a LED on P2.5  (470 Ohms series resistor to GND)

disclaimer
----------
this example is part of the mspgcc project http://mspgcc.sf.net
see license.txt for details.

chris