Serge NOEL
62 lines
3.4 KiB
Arduino
62 lines
3.4 KiB
Arduino
// Receive Bulk Data from the Turnout Table via Serial Transmission from JMRI
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// Author: Geoff Bunza 2018
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// Version 1.1
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// This is preconfigured for an Arduino Uno, Pro Mini, or Nano, pins 2-19, no inversion, no offset
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// Transmission is of the form "ATxxx.S where AT is the user name prefix from the JMRI turnout table
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// xxx is the number of the turnout (User name is built of the form AT123,
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// and "S" is the "State" of the turnout where Closed=0 and Thrown=1
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// Transmission is received from JMRI via TurnoutDataTransfer.py Python Script
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// It is assumed that the Arduino starts up before the Python Script
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// The script will set up listeners for all its turnouts and only update them when they change
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// The Arduino will update the appropriate pin, which can have an offset, and be o[ptionally inverted
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// The serial port assigned to this Arduino must correspond to the Serial Port in the corresponding TurnoutDataTransfer.py Script
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//
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#define Data_Pin_Max 20 // Max sensor pin NUMBER (plus one) Mega=70,UNO,Pro Mini,Nano=20
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#define Data_Pin_Start 2 // Starting Sensor Pin number (usually 2 as 0/1 are TX/RX
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#define Data_Pin_Offset 0 // This Offset will be ADDED to the value of each Turnout number to determine the Data pin
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// number used by the Arduino, so pin AT12 will set pin 12+Data_Offset)
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// This would allow one Arduino Turnout Data channel to use AT2-69 set pins 2-69 and another to
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// use AT70-137 to set its pins 2-69 for example; this offset can also be negative
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#define Data_Invert 0 // Set Data_Active_Low to 1 to invert incomin Turnout data Closed=1 Thrown=0
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// Set Data_Active_Low to 0 to leave incoming data untouched Closed=0 Thrown=1
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#define open_delay 15 // longer delay to get past script initialization - leave this alone
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#define delta_delay 4 // Short delay to allow the script to get all the characters - leave this alone
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int i;
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char firstByte ; // temp to process the possible state change
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char secondByte ;
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char incomingByte = 0; // working temp for character processing
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int turnout = 99;
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#define port_delay 600 // Serial Port delay (microsec) for error compensation - increase this if you get funny data at high speeds
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void setup(){
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Serial.begin(19200); // Open serial connection.
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for (i=Data_Pin_Start; i< Data_Pin_Max; i++) { // Set up all the output pins
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pinMode (i, OUTPUT);
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digitalWrite (i, LOW);
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}
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}
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void loop() {
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if (Serial.available() > 0) { // wait until we get a charater from JMRI
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// get the first character
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firstByte = Serial.read();
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delayMicroseconds(port_delay);
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while (firstByte != 'A') {
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firstByte = Serial.read();
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delayMicroseconds(port_delay);
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}
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secondByte = Serial.read(); // get the second character
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if ((firstByte=='A') && (secondByte == 'T')) {
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i=0;
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turnout = Serial.parseInt();
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turnout = turnout + Data_Pin_Offset ;
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incomingByte=Serial.read();
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delayMicroseconds(port_delay);
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incomingByte=Serial.read();
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if (incomingByte =='1') digitalWrite (turnout, 1 ^ Data_Invert);
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if (incomingByte =='0') digitalWrite (turnout, 0 ^ Data_Invert);
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//Serial.print (turnout);
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//Serial.print (" ");
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//Serial.println (incomingByte);
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}
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}
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}
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