mirror of https://github.com/ArduPilot/ardupilot
85 lines
2.0 KiB
C++
85 lines
2.0 KiB
C++
/*
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LiquidCrystal Library - Hello World
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Demonstrates the use a 16x2 LCD display. The LiquidCrystal
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library works with all LCD displays that are compatible with the
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Hitachi HD44780 driver. There are many of them out there, and you
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can usually tell them by the 16-pin interface.
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This sketch prints "Hello World!" to the LCD
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and shows the time.
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The circuit:
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* LCD RS pin to digital pin 12
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* LCD Enable pin to digital pin 11
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* LCD D4 pin to digital pin 5
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* LCD D5 pin to digital pin 4
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* LCD D6 pin to digital pin 3
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* LCD D7 pin to digital pin 2
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* LCD R/W pin to ground
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* 10K resistor:
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* ends to +5V and ground
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* wiper to LCD VO pin (pin 3)
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Library originally added 18 Apr 2008
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by David A. Mellis
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library modified 5 Jul 2009
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by Limor Fried (http://www.ladyada.net)
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example added 9 Jul 2009
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by Tom Igoe
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modified 22 Nov 2010
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by Tom Igoe
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This example code is in the public domain.
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http://www.arduino.cc/en/Tutorial/LiquidCrystal
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*/
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// include the library code:
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#include <AP_Common.h>
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#include <AP_Math.h>
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#include <AP_Param.h>
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#include <AP_Progmem.h>
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#include <AP_HAL.h>
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#include <AP_HAL_AVR.h>
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#include "LCrystal.h"
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#if CONFIG_HAL_BOARD == HAL_BOARD_APM2
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const AP_HAL::HAL& hal = AP_HAL_AVR_APM2;
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#elif CONFIG_HAL_BOARD == HAL_BOARD_APM1
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const AP_HAL::HAL& hal = AP_HAL_AVR_APM1;
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#endif
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// initialize the library with the numbers of the interface pins
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LiquidCrystal lcd(8, 9, 4, 5, 6, 7);
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void setup() {
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/* pin 54 is A0 on the mega */
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hal.gpio->pinMode(54, HAL_GPIO_INPUT);
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// set up the LCD's number of columns and rows:
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lcd.begin(16, 2);
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// Print a message to the LCD.
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lcd.print("hello, world!");
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}
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void loop() {
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// set the cursor to column 0, line 1
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// (note: line 1 is the second row, since counting begins with 0):
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lcd.setCursor(0, 1);
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// print the number of seconds since reset:
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lcd.print(hal.scheduler->millis()/1000);
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lcd.setCursor(8, 1); /* Halfway over second row */
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if (hal.gpio->read(54)) {
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lcd.print("high");
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} else {
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lcd.print("low ");
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}
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}
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AP_HAL_MAIN();
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