this is my code to parse a datagram : "@9,1$" header "@" , trailer "$", data "9,1"-> PIN=9 and state=1, but M4 not responding properly the code Arduino: Code: #define RCVSIZE 10 char inByte; char msg[RCVSIZE]; int count = 0; int pin=0; int count2=0; int PIN=0; int stato=0; char *header; char *trailer; char *buff=msg; int indice=0; int pin8,pin9,pin10; String result; boolean received = false; // store if Arduino received something // the setup routine runs once when you press reset: void setup() { // initialize serial port at a baud rate of 19200 bps Serial.begin(115200); delay(100); //Serial.println("start"); } void loop() { // put your main code here, to run repeatedly: while (Serial.available() > 0) { // get the new byte: inByte = Serial.read(); msg[count++] = inByte; if(count>9) count=0; if(inByte=='@') { header = buff + count; } else if (inByte=='$') { trailer = buff + count; indice = header - buff; if( *(buff + (indice + 2)%RCVSIZE)==',') { PIN =(*(buff + (indice)%RCVSIZE)-48)*10 + *(buff + ((indice + 1)%RCVSIZE) - 48); stato=*(buff + (indice + 3)%RCVSIZE) - 48; } else { PIN =*(buff + (indice)%RCVSIZE) -48; stato=*(buff + (indice + 2)%RCVSIZE) - 48; } received=true; count=0; } } if(received) { //Serial.print(PIN); if(PIN==0 && stato==0) { pin8=digitalRead(8); pin9=digitalRead(9); pin10=digitalRead(10); result=String(pin8) + "," + String(pin9) + "," + String(pin10); if (Serial.available()) Serial.println(result); } else { pinMode(PIN, OUTPUT); digitalWrite(PIN, stato); if (PIN == 8) { if (Serial.available()) Serial.println("8 ok"); } else if (PIN == 9) { if (Serial.available()) Serial.println("9 ok"); } else if (PIN == 10) { if (Serial.available()) Serial.println("10 ok"); } else { if (Serial.available()) Serial.println("ERROR"); } } received = false; } delay(100); } Code: and PHP code: <?php session_start(); include "php_serial.class.php"; define("PORT","/dev/ttyMCC"); if (!$_SESSION['loaded']) { } $_SESSION['loaded'] = true; if (isset($_GET['action'])) { $serial = new phpSerial; $serial->deviceSet(PORT); $serial->confBaudRate(115200); $serial->confParity("none"); $serial->confStopBits(1); $serial->confFlowControl("none"); $serial->deviceOpen(); $portaStato=$_GET['action']; $serial->sendMessage($portaStato); if ($portaStato == "@8,1$") { $_SESSION['$ledOn8'] = true; $ledOn = $_SESSION['$ledOn8']; } elseif ($portaStato == "@8,0$") { $_SESSION['$ledOn8'] =false; $ledOn = $_SESSION['$ledOn8']; } else if ($portaStato == "@9,1$") { $_SESSION['$ledOn9'] = true; $ledOn = $_SESSION['$ledOn9']; } elseif ($portaStato == "@9,0$") { $_SESSION['$ledOn9']= false; $ledOn = $_SESSION['$ledOn9']; } else if ($portaStato == "@10,1$") { $_SESSION['$ledOn10'] = true; $ledOn = $_SESSION['$ledOn10']; } elseif ($portaStato == "@10,0$") { $_SESSION['$ledOn10']=false; $ledOn = $_SESSION['$ledOn10']; } elseif($portaStato == "@0,0$") { } $read = $serial->readPort(); } else serialStart(); function serialStart(){ $serial = new phpSerial; $serial->deviceSet(PORT); $serial->confBaudRate(115200); $serial->confParity("none"); $serial->confStopBits(1); $serial->confFlowControl("none"); $serial->deviceOpen(); $serial->sendMessage("@0,0$"); $readRx = $serial->readPort(); $pieces = explode(",", $readRx); //echo $readRx; $_SESSION['$ledOn8']= $pieces[0]; // piece1 $_SESSION['$ledOn9']= $pieces[1]; // piece2 $_SESSION['$ledOn10']= $pieces[2]; // piece1 } ?>
You say it is not responding properly. What is not working? Do you get errors? What if you print the result of your PIN and stato to Serial? Do you get what you expected?
Dear, From minicom M4 responding properly. I nstead of php never answers. I've read about the communication problems between the M4 and A9 and I put the delays in Arduino. Since communication with minicom works, I do not understand why it does not work with php. Best regards
Does the udoo php serial example work? https://github.com/UDOOboard/serial_libraries_examples There is also an HTML part that influences the PHP output. There is no issue with /dev/ttyMCC that this would not work.
Code: <!DOCTYPE html> <html> <head> <title>RTUFast</title> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.0/jquery.min.js"></script> <!-- Latest compiled and minified CSS --> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous"> <!-- Optional theme --> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap-theme.min.css" integrity="sha384-rHyoN1iRsVXV4nD0JutlnGaslCJuC7uwjduW9SVrLvRYooPp2bWYgmgJQIXwl/Sp" crossorigin="anonymous"> <!-- Latest compiled and minified JavaScript --> <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script><script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.5/js/bootstrap.min.js" integrity="sha384-BLiI7JTZm+JWlgKa0M0kGRpJbF2J8q+qreVrKBC47e3K6BW78kGLrCkeRX6I9RoK" crossorigin="anonymous"></script> </head> <body> <div class="container-fluid"> <div class="row"> <div class="jumbotron"> <h1>PANELLO DI CONTROLLO</h1> <p><a class="btn btn-primary btn-lg" href="?action=@0,0$" role="button">Aggiorna lo stato attuale dei led</a></p> <div class="bg-default text-white"> <p class="text-muted" ><b >RISPOSTA: </b><?php echo json_encode( $ledOn ); ?>,<?php echo json_encode( $portaStato ); ?>,<?php echo json_encode( $read ); ?></p> </div> </div> </div> <div class="row"> <div class="col-md-4"> <div class="panel panel-default"> <div class="panel-heading"> <h3 class="panel-title">GPIO21/pin8</h3> </div> <div class="panel-body"> <?php if ($_SESSION['$ledOn8']) { ?> <img src="light.png" style="width:100px;"><br> <a class="btn btn-default" href="?action=@8,0$"><span class="tag tag-pill tag-default">ACCESO, PREMI PER SPEGNERE</span></a> <?php } else { ?> <img src="light.png" style="width:100px; filter:grayscale(100%); -webkit-filter: grayscale(100%);"><br> <a class="btn btn-default" href="?action=@8,1$"><span class="tag tag-pill tag-default">SPENTO, PREMI PER ACCENDERE</span></a> <?php } ?> </div> </div> </div> <div class="col-md-4"> <div class="panel panel-default"> <div class="panel-heading"> <h3 class="panel-title">GPIO19/pin9</h3> </div> <div class="panel-body"> <?php if ($_SESSION['$ledOn9']) { ?> <img src="light.png" style="width:100px;"><br> <a class="btn btn-default" href="?action=@9,0$"><span class="tag tag-pill tag-default">ACCESO, PREMI PER SPEGNERE</span></a> <?php } else { ?> <img src="light.png" style="width:100px; filter:grayscale(100%); -webkit-filter: grayscale(100%);"><br> <a class="btn btn-default" href="?action=@9,1$"><span class="tag tag-pill tag-default">SPENTO, PREMI PER ACCENDERE</span></a> <?php } ?> </div> </div> </div> <div class="col-md-4"> <div class="panel panel-default"> <div class="panel-heading"> <h3 class="panel-title">GPIO1/pin10</h3> </div> <div class="panel-body"> <?php if ($_SESSION['$ledOn10']) { ?> <img src="light.png" style="width:100px;"><br> <a class="btn btn-default" href="?action=@10,0$"><span class="tag tag-pill tag-default">ACCESO, PREMI PER SPEGNERE</span></a> <?php } else { ?> <img src="light.png" style="width:100px; filter:grayscale(100%); -webkit-filter: grayscale(100%);"><br> <a class="btn btn-default" href="?action=@10,1$"><span class="tag tag-pill tag-default">SPENTO, PREMI PER ACCENDERE</span></a> <?php } ?> </div> </div> </div> </div> <div class="row"> </div> </div> <script type="text/javascript"> </script> </body> </html>
Dear waltervl Dear, Unfortunately, the php udoo example does not work properly, it is not stable, it works for the first few minutes and then it stops. This problem is serious, for a board that was created to communicate two processors. I also have a board QUAD / DUAL and I tried the same code, on this board (DUAL) work correctly. I have always checked the codes on both boards, and QUAD / DUAL always works. I hope udoo, draws up a kernel that allows reliable and robust communication, passed that hurdle, then udooneo could really be a great board.
I will try it myself tonight. You are on the latest Udoobuntu 2? In my How-To: Control Neo Arduino from Web page I had the same type of A9 <->M4 communication running for days without any issues.
I'm using Java serial communication and I haven't noticed any problem lately. edit: If your program makes some memory error on the M4 the typical behaviour is to lock up completely.
Dear Maurice, I believe that the problem is with php, at this point I think the php serial library is not optimized for this platform, but I'm not sure.
Found it! The problem is php_serial.class.php One problem is that the baudrate cannot be set by Linux command stty (that is what the php serial class is using). Probably because it is a virtual device in the Neo and not a physical one as on the Dual/Quad. Another problem is that the php serial function sendmessage has a wait (usleep) in it that messes things up. The pradeep processes are stacking up then. That messes the Neo up I suppose. I made the following changes in various files to get things working properly. I hope it helps you with setting up a gooed php website. If you have it running pleas give us a demonstration in Arduino sketch set baudrate to 38400: Serial.begin(38400); In php_serial.class.php out comment line 460: //usleep((int) ($waitForReply * 1000000)); And not really needed but I felt a better response: In index.php moved the serial port definition higher so it will not be called at every action but only at the beginning. I also outcommented the confbaudrate line to prevent errors. Code: define("PORT","/dev/ttyS0"); $ledOn = false; include "php_serial.class.php"; $serial = new phpSerial; $serial->deviceSet(PORT); //$serial->confBaudRate(115200); $serial->confParity("none"); $serial->confStopBits(1); $serial->confFlowControl("none"); $serial->deviceOpen(); if (isset($_GET['action'])) { .............
