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129 lines
2.5 KiB
129 lines
2.5 KiB
// Breadboard |
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//int enable = 2; |
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//int sTx = 4; |
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//int sRx = 5; |
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// RS485-Nano Revision 1.0 |
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int enable = 9; |
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int sTx = 8; |
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int sRx = 3; |
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// Für Controllino könnte man benutzen: sRx = 20, sTx = 21, enable = 53 |
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int in1 = 4; // o |
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int in2 = 5; // |o |
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int in3 = 6; // ||o |
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int in4 = 7; // |||o |
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// ↓↓↓↓ |
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int irq = 2;// ←++++ |
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long base = 1000; |
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int id = 0; |
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int baud = 115200; |
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char c; |
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int counter = 0; |
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bool reg1=false,reg2=false,reg3=false,reg4=false; |
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void setup(){ |
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Serial.begin(baud); |
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pinMode(A0,INPUT); |
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id = analogRead(A0); |
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pinMode(enable,OUTPUT); |
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digitalWrite(enable,LOW); |
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pinMode(sTx,OUTPUT); |
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digitalWrite(sTx,LOW); |
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pinMode(in1,INPUT); |
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pinMode(in2,INPUT); |
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pinMode(in3,INPUT); |
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pinMode(in4,INPUT); |
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pinMode(irq,INPUT); |
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attachInterrupt(digitalPinToInterrupt(irq),interrupt,RISING); |
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pinMode(sRx,INPUT); |
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Serial.print("Baud rate set to "); |
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Serial.println(baud); |
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Serial.print("Initialized Arduino #"); |
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Serial.println(id); |
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} |
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void interrupt(){ |
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Serial.println("Interrupt"); |
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reg1 = digitalRead(in1); |
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reg2 = digitalRead(in2); |
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reg3 = digitalRead(in3); |
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reg4 = digitalRead(in4); |
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} |
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bool sendBit(bool bt){ |
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digitalWrite(sTx,bt); |
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delayMicroseconds(80); |
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if (digitalRead(sTx) != bt) return false; |
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delayMicroseconds(base-80); |
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return true; |
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} |
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bool sendChar(char c){ |
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return sendBit(c & 0x01) |
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&& sendBit(c & 0x02) |
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&& sendBit(c & 0x04) |
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&& sendBit(c & 0x08) |
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&& sendBit(c & 0x10) |
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&& sendBit(c & 0x20) |
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&& sendBit(c & 0x40) |
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&& sendBit(c & 0x80); |
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} |
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bool sendString(String s){ |
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Serial.print("Sending '"+s+"'…"); |
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boolean busy = false; |
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for (int i = 0; i<11; i++){ |
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if (!digitalRead(sRx)) { |
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if (!busy){ |
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Serial.print("busy…"); |
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busy = true; |
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} |
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i = 0; // wait for free line |
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} |
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delayMicroseconds(base); |
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} |
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digitalWrite(enable,HIGH); |
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bool success = sendBit(0); // erste Flanke erzeugen |
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if (success) { |
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for (char c : s){ |
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if (!sendChar(c)){ |
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success = false; |
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break; |
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} |
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} |
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} |
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success = success && sendChar(13); |
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success = success && sendBit(1); // letzte Flanke erzeugen |
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digitalWrite(enable,LOW); |
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Serial.println(success ? "success" : "failed"); |
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return success; |
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} |
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void loop(){ |
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if (reg1){ |
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reg1 = false; |
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sendString("t:02:01"); |
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} |
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if (reg2){ |
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reg2 = false; |
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sendString("t:02:02"); |
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} |
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if (reg3){ |
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reg3 = false; |
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sendString("t:02:03"); |
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} |
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if (reg4){ |
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reg4 = false; |
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sendString("t:02:04"); |
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} |
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}
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