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56 lines
1.3 KiB
56 lines
1.3 KiB
/* |
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* Demonstrates how to use LCDisplay in conjunction with SoftRS485: |
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* |
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* The main _loop_ of this program listens on the RS485 bus. |
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* Whenever a message is received from the bus, it is displayed on the LCD. |
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*/ |
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// include the library code: |
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#include <LiquidCrystal.h> |
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#include <SoftRS485.h> |
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#define Max485_RO 3 // read-output of Max485 |
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#define Max485_RE 5 // not-read-enable of Max485 |
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#define Max485_DE 9 // data enable of Max485 |
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#define Max485_DI 8 // data input of Max485 |
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#define LCD_RS 4 |
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#define LCD_EN 6 |
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#define LCD_D4 7 |
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#define LCD_D5 11 |
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#define LCD_D6 12 |
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#define LCD_D7 13 |
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// initialize the library by associating any needed LCD interface pin with the arduino pin number it is connected to |
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LiquidCrystal lcd(LCD_RS, LCD_EN, LCD_D4, LCD_D5, LCD_D6, LCD_D7); |
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void setup() { |
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Serial.begin(115200); |
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init485(Max485_RO,Max485_RE,Max485_DE,Max485_DI); // library initialization: |
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invert485polarity(true); |
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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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Serial.println("LCDReceive 1.2"); |
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lcd.print("LCDReceive 1.2"); |
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} |
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void loop() { |
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if (available485()) { |
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String s = get485message(); |
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Serial.println(s); |
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lcd.clear(); |
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lcd.setCursor(0, 0); |
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lcd.print(s); |
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if (s.length()>16) { |
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lcd.setCursor(0, 1); |
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s=s.substring(16); |
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s.trim(); |
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lcd.print(s); |
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} |
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} |
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}
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