Do you have a better/working example? Using multiple serialport works fine in Gambas (we use it in DomotiGa). You can read byte for byte, or read it into an array (latter one i recommend). Then you just loop through the array until you find STX/ETX characters ;-)
2016-06-30 12:17 GMT+02:00 zxMarce <d4t4f...@gmail.com>: > Hi there. Using Gambas 3.8.4 from PPA on Ubuntu 14.04 x64. > > I'm having issues with serial ports. I have a USB to 4 RS232C hub adapter. > It is working on a virtual Windows machine, reading and writing as it is > supposed to do. The connected device (using one port only) is a Magnetic > Card Encoder that uses binary data (i.e: not always printable ASCII) to be > told what to do. Using the mobo's built-in RS232 port as well as a PCIe > 4xRS232 card yield the same results, so the ports do not seem to be at > fault > here. > > My program tries to guess if the encoder is present at the specified port > by > sending the byte sequence 0x02-0xF8-0x31-0x03, which is an invalid command > for the device. The device should respond with 0x02-0x15-0x03. > > All data comm blocks are surrounded by STX (0x02) and ETX (0x03) bytes. > > The problems I am having are two: > > 1- I can't have Gambas trigger the READ event for the port, thus I call it > by hand. > 2- I can't figure out how to get the data from the encoder into a string > without missing bytes. > > My code is encapsulated in a class. Declarations: > > > > Instancing and setting the port up: > > > > Then, I send TEST_TX and expect for either TEST_RX or a timeout: > > > > Finally, this next is the problem code. It does not fire as expected when > data arrives, and when I call it by hand in the IF above, if I try to READ > #m_tty As String it chops off the leading 0x02 byte, and I could not figure > out how to READ #m_tty As Byte[] or As Object (I get a null error; nothing > on the message.error text, and no OK button on it either): > > > > A breakpoint in the "sgmnt = Read #m_tty As Object" line show that the > value > of "dLen" is three, which is OK. But when I try to READ As String, the > leading 0x02 is missing from the string, leaving only 0x15-0x03. When this > is later compared to TEST_RX in Test(), the comparison obviously fails. > > Hope someone can help me out. I guess my heavy VB6 background is > interfering > but can't really see how. > > TIA, > zxMarce. > > > > -- > View this message in context: > http://gambas.8142.n7.nabble.com/Serial-Port-issues-and-events-tp56614.html > Sent from the gambas-user mailing list archive at Nabble.com. > > > ------------------------------------------------------------------------------ > Attend Shape: An AT&T Tech Expo July 15-16. Meet us at AT&T Park in San > Francisco, CA to explore cutting-edge tech and listen to tech luminaries > present their vision of the future. This family event has something for > everyone, including kids. Get more information and register today. > http://sdm.link/attshape > _______________________________________________ > Gambas-user mailing list > Gambas-user@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/gambas-user > ------------------------------------------------------------------------------ Attend Shape: An AT&T Tech Expo July 15-16. Meet us at AT&T Park in San Francisco, CA to explore cutting-edge tech and listen to tech luminaries present their vision of the future. This family event has something for everyone, including kids. Get more information and register today. http://sdm.link/attshape _______________________________________________ Gambas-user mailing list Gambas-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/gambas-user
