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https://github.com/DCC-EX/CommandStation-EX.git
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72 lines
2.7 KiB
C++
72 lines
2.7 KiB
C++
#include "DCC.h"
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#include "DIAG.h"
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#include "DCCEXParser.h"
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#include "WifiInterface.h"
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/* this code is here to demonstrate use of the DCC APi
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*/
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// myFilter is an example of an OPTIONAL command filter used to intercept < > commands from
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// the usb or wifi streamm. It demonstrates how a command may be intercepted
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// or even a new command created without having to bfreak open the API library code.
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// The filgter is permitted to use or modify the parameter list before passing it on to
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// the standard parser. By setting the opcode to ZERO, the standard parser will
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// just ignore the command on the assumption that you have already handled it.
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//
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// The filter must be enabled by calling the DCC EXParser::setFilter method, see use in setup().
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void myFilter(Stream & stream, byte & opcode, byte & paramCount, int p[]) {
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switch (opcode) {
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case 'T': // Intercept turnout functions because I have special hardware
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DIAG(F("\nStop messing with Turnouts!"));
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opcode=0; // tell parssr to ignore ithis command
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break;
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case '#': // Diagnose parser <#....>
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DIAG(F("# paramCount=%d\n"),paramCount);
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for (int i=0;i<paramCount;i++) DIAG(F("p[%d]=%d (0x%x)\n"),i,p[i],p[i]);
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opcode=0; // Normal parser wont understand #,
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break;
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default: // drop through and parser will use the command unaltered.
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break;
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}
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}
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// Callback functions are necessary if you call any API that must wait for a response from the
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// programming track. The API must return immediately otherwise other loop() functions would be blocked.
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// Your callback function will be invoked when the data arrives from the prog track.
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void myCallback(int result) {
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DIAG(F("\n getting Loco Id callback result=%d"),result);
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}
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// Create a serkial command parser... This is OPTIONAL if you don't need to handle JMRI type commands
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// from the Serial port.
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DCCEXParser serialParser;
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void setup() {
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Serial.begin(SERIAL_BAUD_RATE);
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DCC::begin();
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if (WIFI_PORT>0) WifiInterface::setup();
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DIAG(F("\n===== CVReader demonstrating DCC::getLocoId() call ==========\n"));
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DCC::getLocoId(myCallback); // myCallback will be called with the result
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DIAG(F("\n===== DCC::getLocoId has returned, but wont be executed until we are in loop() ======\n"));
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// Optionally tell parser to use my example filter
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DCCEXParser::setFilter(myFilter);
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DIAG(F("\nReady for JMRI commands\n"));
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}
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void loop() {
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DCC::loop(); // required to keep locos running and check powwer
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// This line passes input on Serial to the DCCEXParser
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serialParser.loop(Serial);
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// This line passes input on Wifi to another DCCEXParser
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if (WIFI_PORT>0) WifiInterface::loop();
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}
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