ID: 49976 Updated by: johan...@php.net Reported By: rpiccini at software4u dot it -Status: Open +Status: Feedback Bug Type: Filesystem function related Operating System: WIN XP / UBUNTU 9.04 PHP Version: 5.2.11 New Comment:
For using the serial port from linux I'd suggest to take a look at the dio extension so you can set baud rate, parity, ... via dio_tcsetattr() Are you sure your device really returns anything? did you try other serial port applications? Previous Comments: ------------------------------------------------------------------------ [2009-10-23 17:43:08] rpiccini at software4u dot it Description: ------------ Either on WIN XP or UBUNTU 9.0 can't read back any data from serial port after correctly written to. I'm trying to talk to a fiscal printer trough a custom protocol based on ACK/NACK technique (send data -> receive answer -> respond to answer -> ...) With a serial port scanner (and from the ticket that are correctly printed) I can see that the sent data are well received from fiscal printer. But any "replay" to sent data (which are present if data are sent to serial port from other kind of software/programming languages) are present. The PHP Version is 5.2.11. There were a similar bug report on http://bugs.php.net/bug.php?id=35531 but its state is "closed" (even if the case history is very similar and the problem persists). Reproduce code: --------------- <?php // on UBUNTU $fp = fopen('/dev/ttyS0','r+'); // on WIN XP /*fp = fopen('COM1:','r+');*/ stream_set_timeout($fp, 0, 100); stream_set_blocking($fp,0); $stx = chr(2); $etx = chr(3); $string = $stx."030301346".$etx; // command to eject paper fputs($fp,$string); echo "SENT: ".$string."<br />\n"; // display string sent to serial port $buffer = fread($fp,128); // tested with several int values echo "RECEIVED: ".$buffer."<br />\n"; // display NOTHING! fclose($fp); ?> Expected result: ---------------- a correct ACK (chr(6)) or an incorrect NACK (chr(15)) from serial port (sent by the fiscal printer) Actual result: -------------- NOTHING (no a single char) ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=49976&edit=1
