|
本帖最后由 弘毅 于 2018-11-20 09:13 编辑
Arduino编译报错‘fatal error: WConstants.h: No such file or directory’ 该如何解决。按照网上的放发试过更新两个库函数还是没有用,而且只是个1602显示屏自带的测试程序,而且也没见调用过OneWire和DallasTemper两个函数呀,换了另外一个程序也是一样报这个错误 我该怎样处理?谢谢!!
- //example use of LCD4Bit_mod library
- #include <LCD4Bit_mod.h>
- //create object to control an LCD.
- //number of lines in display=1
- LCD4Bit_mod lcd = LCD4Bit_mod(2);
- //Key message
- char msgs[5][15] = {"Right Key OK ",
- "Up Key OK ",
- "Down Key OK ",
- "Left Key OK ",
- "Select Key OK" };
- int adc_key_val[5] ={30, 150, 360, 535, 760 };
- int NUM_KEYS = 5;
- int adc_key_in;
- int key=-1;
- int oldkey=-1;
- void setup() {
- pinMode(13, OUTPUT); //we'll use the debug LED to output a heartbeat
- lcd.init();
- //optionally, now set up our application-specific display settings, overriding whatever the lcd did in lcd.init()
- //lcd.commandWrite(0x0F);//cursor on, display on, blink on. (nasty!)
- lcd.clear();
- lcd.printIn("KEYPAD testing... pressing");
-
- }
- void loop() {
- adc_key_in = analogRead(0); // read the value from the sensor
- digitalWrite(13, HIGH);
- key = get_key(adc_key_in); // convert into key press
-
- if (key != oldkey) // if keypress is detected
- {
- delay(50); // wait for debounce time
- adc_key_in = analogRead(0); // read the value from the sensor
- key = get_key(adc_key_in); // convert into key press
- if (key != oldkey)
- {
- oldkey = key;
- if (key >=0){
- lcd.cursorTo(2, 0); //line=2, x=0
- lcd.printIn(msgs[key]);
- }
- }
- }
-
- //delay(1000);
- digitalWrite(13, LOW);
- }
- // Convert ADC value to key number
- int get_key(unsigned int input)
- {
- int k;
-
- for (k = 0; k < NUM_KEYS; k++)
- {
- if (input < adc_key_val[k])
- {
-
- return k;
- }
- }
-
- if (k >= NUM_KEYS)
- k = -1; // No valid key pressed
-
- return k;
- }
复制代码
|
|