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124 lines
3.2 KiB
124 lines
3.2 KiB
/* |
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* Demonstrates how to use Read Buttons in conjunction with SoftRS485: |
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* |
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* If a button is pressed, a corresponding flag is set. |
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* The main loop checks for the state of those flags and |
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* sends a message on the RS485 bus whenever a flag is set. |
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*/ |
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// include the library code: |
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#include <SoftRS485.h> |
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// 0=Test |
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// 1=Flur |
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// 2=Wohnzimmer |
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// 3=Bad EG |
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// 4=Treppenhaus |
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// 5=Arbeitszimmer |
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// 6=Bad OG |
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#define ID 0 |
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#define PROGRAM "Sender" |
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#define SW_VERSION "1.3" |
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#define HW_VERSION "2.0" |
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#define BTN_INT 2 // button interrupt pin |
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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 TRESHOLD 1024 |
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#define TRIGGER_LEVEL 200 |
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//#define DEBUG |
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//#define LOG_TO_SERIAL |
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#define SEND_485 |
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boolean raw_states[8]; |
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boolean states[8]; |
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unsigned long capacitor[8]; |
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unsigned long times[8]; |
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void setup(){ |
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for (int i=0; i<8;i++) { |
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capacitor[i] = 0; |
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raw_states[i] = LOW; |
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states[i] = LOW; |
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} |
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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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pinMode(BTN_INT,INPUT_PULLUP); |
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pinMode(14,INPUT_PULLUP); |
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pinMode(15,INPUT_PULLUP); |
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pinMode(16,INPUT_PULLUP); |
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pinMode(17,INPUT_PULLUP); |
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pinMode(18,INPUT_PULLUP); |
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pinMode(19,INPUT_PULLUP); |
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pinMode(20,INPUT_PULLUP); |
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pinMode(21,INPUT_PULLUP); |
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attachInterrupt(digitalPinToInterrupt(BTN_INT),isr,CHANGE); |
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String s = "{nano:"+String(ID)+",hw:"+HW_VERSION+","+PROGRAM+":"+SW_VERSION+"}"; |
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Serial.println(s); |
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send485(s.c_str()); |
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#ifdef LOG_TO_SERIAL |
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Serial.println("14 15 16 17 18 19 20 21"); |
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#endif |
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} |
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void isr(){ |
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raw_states[0] = analogRead(14)<TRIGGER_LEVEL; |
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raw_states[1] = analogRead(15)<TRIGGER_LEVEL; |
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raw_states[2] = analogRead(16)<TRIGGER_LEVEL; |
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raw_states[3] = analogRead(17)<TRIGGER_LEVEL; |
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raw_states[4] = analogRead(18)<TRIGGER_LEVEL; |
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raw_states[5] = analogRead(19)<TRIGGER_LEVEL; |
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raw_states[6] = analogRead(20)<TRIGGER_LEVEL; |
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raw_states[7] = analogRead(21)<TRIGGER_LEVEL; |
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#ifdef LOG_TO_SERIAL |
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for (int i=0;i<8;i++){ |
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Serial.print(" "); |
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Serial.print(raw_states[i]); |
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Serial.print(" "); |
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} |
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Serial.println(); |
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#endif |
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} |
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void send(int btn, long duration){ |
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String s = "{nano:"+String(ID)+",btn:"+String(btn)+",ms:"+String(duration)+"}"; |
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#ifdef SEND_485 |
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for (int i = 0; i<10; i++){ |
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if (send485(s.c_str())) break; |
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Serial.println("collision detected, trying again:"); |
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} |
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#else |
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Serial.println(s); |
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#endif |
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} |
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void loop(){ |
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unsigned long now = micros(); |
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for (int i=0;i<8;i++){ |
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// we emulate a capacitor: |
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// when the button is pressed, it slowly loads, if the button is released, it unloads. |
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capacitor[i] = raw_states[i] ? capacitor[i]+1 : capacitor[i]>>1; |
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// if the capacitor reaches a certain treshold, the state is changed |
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boolean new_state = capacitor[i]>TRESHOLD; |
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// TODO: drop state after a maximum HIGH time |
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// when the state changes, the duration of the last state is calculated |
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if (states[i] != new_state){ |
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long diff = (now - times[i])/1000; |
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times[i] = now; |
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if (states[i]) send(i+1,diff); // old state was HIGH → we are going LOW |
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states[i] = new_state; |
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} |
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} |
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}
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