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发表于 2011-1-28 23:23:26
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2年前我就做过这个东西，发上来没人感冒。实际上就是用最老的电路，232的，配一个232转USB一样用。
(原文件名:myduino1 001.jpg)
(原文件名:myduino1.jpg)
硬件上就是带232串口的AVR机，它的程序包里已经继承了WINAVR的内容
优点：使用简单，如果买现成的，不会硬件的也能用，做这个1602LCD用不着去写函数，只用现成的LCD库就可以了
不足：没办法灵活使用AVR。例如指定就pin0-pin13输出，对应PD0-PB5.
例如上述液晶显示乘虚仲有实例直接就用
代码
LiquidCrystal Library - Hello World
Demonstrates the use a 16x2 LCD display. The LiquidCrystal
library works with all LCD displays that are compatible with the
Hitachi HD44780 driver. There are many of them out there, and you
can usually tell them by the 16-pin interface.
This sketch prints "Hello World!" to the LCD
and shows the time.
The circuit:
* LCD RS pin to digital pin 12
* LCD Enable pin to digital pin 11
* LCD D4 pin to digital pin 5
* LCD D5 pin to digital pin 4
* LCD D6 pin to digital pin 3
* LCD D7 pin to digital pin 2
* 10K resistor:
* ends to +5V and ground
* wiper to LCD VO pin (pin 3)
Library originally added 18 Apr 2008
by David A. Mellis
library modified 5 Jul 2009
by Limor Fried (http://www.ladyada.net)
example added 9 Jul 2009
by Tom Igoe
modified 8 Feb 2010
by Tom Igoe
This example code is in the public domain.
http://www.arduino.cc/en/Tutorial/LiquidCrystal
*/
// include the library code:
#include <LiquidCrystal.h>
// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(12, 11, 5, 4, 3, 2); //液晶类型的函数12,11,5,4,3,2指的是pin12:RS,pin11:E,pin5:D4,pin4:D5,pin3:D6,pin2:D7用4线接法
void setup() { //这一段相当于main(){...}中while(1)之前的部分
// set up the LCD's number of columns and rows:
lcd.begin(16, 2);
// Print a message to the LCD.
lcd.print("hello, world!");
}
void loop() { //这一段相当于while(1){...}里面的部分
// set the cursor to column 0, line 1
// (note: line 1 is the second row, since counting begins with 0):
lcd.setCursor(0, 1);
// print the number of seconds since reset:
lcd.print(millis()/1000);
} |
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