This class was designed to allow to communicate using a serial interface (usually RS-232 serial port). This class inherits from Stream class, so you can use standard streams methods to send and receive data, and to close the port.
Gambas Serial Port Send Receive
I am expeciting to recieve a hex stream that should be 7120A031, however what I find is the Serial monitor only sends back 71. If I continue to press the button I eventually get the rest after a total of 4 button presses which look like this on the serial monitor:
Now if I use Tera Term and send the commands through there I get the whole stream in one go as I should. I should be getting up to 128 characters through the serial buffer but it doesnt seem to be the case. I havent changed anything and my code to read it is quite standard and straight forward:
I know I can get around the problem by having a simple loop that runs 4 times to return what I am expecting, but is there no way to just read the stream buffer as it is because I'm not expecting the hardware will go crazy and send a load of junk down the port?
My recommendation is to use Bill Porters EasyTransfer to help with this sort of problem. It performs CRC checks, so if the data is good, you can send it back to the Mega and verify that the right data was received. If the data wasn't good then you can signal that too.
The AWC GP3 board gives your PC an easy way to read digital and analog quantities. It also allows your PC to send digital and analog signals to control the outside world. The GP3 connects to your PC using a serial port (which can be a USB serial port). The board comes with libraries and examples for a variety of development environments including Windows, Java, and Linux.
It was easy to layout the main form using the Gambas editor (which, I understand, is actually written in Gambas). The project requires several components to be selected -- in addition to the "usual" classes, you need the gb.desktop, gb.net, gb.settings, and gp3 components. The desktop component allows you to control the screen saver (well, sort of; you'll read more about that later). The net component contains the serial port interface which the gp3 component uses. The only purpose for the settings component is to save the program's settings when you close it so that it will reload them when you reopen the program.
I'm doing a project in linux for which i need to write binary data into the device file of serial port (RS232) port. when i write the file into serial port (RS232), a RF transmitter connected to this port must send signal to RF receivers situated at different places.
The Processing application sketch below uses up and down buttons to scroll through the list of available serial ports. The Connect button is used to connect to the selected serial port. The Disconnect button disconnects the application from the currently open serial port. A Refresh button updates the list of serial ports and is used in case a serial device is plugged into the PC after the application was started.
An alternative way of connecting to the serial port is to start the Processing application and then plug the serial device in. A Processing sketch can be used to find the serial port number of the newly plugged in device.
Qt3 on Cygwin exists now, and someone on the gambas-user mailing list is doing a lot of work to port Gambas to Cygwin before attempting to port it to native Windows (which I think will be pretty tough indeed.)
You stick the prom in your breadboard, and wire it up to the appropriate ports and pins of the Arduino, which bit bangs the prom and returns the results though the serial connection of the Arduino. Using a terminal program on the pc side you capture the text and use a script to convert the ascii values into a binary nibble format and save as hex.
Owl DualDiode Protocol BreakOne-way transfer is achieved through a simplex optical link that has just one light source (at the source computer) and just one photo detector (at the destination computer). No information of any kind, including handshaking protocols, (TCP/IP, SCSI, USB, serial/parallel ports, etc.) will ever travel from the destination computer back to the source computer. Special patented protocols are used to assure this reliable, absolute one-way transfer. One-way transfer is redundantly enforced in the communication hardware and driver software applications to ensure that data residing on the isolated domain, and the isolated domain itself, are fully protected. Thus, DualDiode hardware and proprietary software are a non-routable protocol break between sending and receiving domains.
It is defined in software as far as the Mpeg2 encoders and the multiplexer. These stages are set by software using Ubuntu Studio 10.04 this is a form of Linux used as the Operating System (OS), using shell script files. The code used is based on C programing language and lets me plug into various software modules. To assemble data packets as a DVB transport stream made up of 188 bytes , that can be sent to/or from any device on the network. Such as Xbox Media center or any number of computers. This is where I took advantage of the User Datagram Protocol (UDP), this protocol is ideal for sending DVB packets. As the name suggests the user sets the packet framing and any handshaking that maybe required. All that the UDP does is set up the IP address to send to and the port-mapping. in this form the UDP will be able to run over network within the LAN IP structure. To recover this data I use an Internet Protocol (IP) to Asynchronous Serial Interface (ASI) converter. This converts to an ASI signal to feed into a L-band (950 to 2150 MHz) Quadrature Phase-Shift Keying (QPSK) modulator. By taking this approach I have kept the cost down to a minimum, where by most of the parts were source from Trademe a local form of Ebay. Such as, Mpeg2 encoder cards, the Satellite tuner cards and a computer to run the required software.
To get these six channels to work as a multiplex TS stream, I used four computers on my LAN network to do this. When I was at technology convention 2009 I talk about how to use play-list files for ATV, this is what I did for Channels 1, 2 and also for the HD channel with promo clips. My Server feed channels, 1 and 2. Another computer had the Satellite receiver card installed for this feed. These Computers all feed their channels to six different ports on the one IP address. On this IP address my laptop was located and acted as the Multiplexer and recodes the PIDs (Packet Identification headers), this is basically what a Multiplexer does. This multiplex stream is then feed to another IP address where the IP to ASI box is located.
One of things of interest I came across is the flexibility of the DVB transport stream. As long as the receiver is capable of decoding the form of compression used, there is wide rang of formats that can be used within the DVB standard. I tested; Mpg2, h264, ac3, AAC, to decode the sound stream I connected up my Satellite receiver via digital audio out to my home theater system.
With these experiments have proven the importances of getting levels right. Once you have encoded the analog signals there are no easy way of changing them. This is why I have an audio level meter in line at all times, checking that I'm not overdriving the sound inputs of the encoder and on the video side I can switch in a video waveform monitor as required. If you have a digital receiver at a repeater site this will also need set these levels.
I have been working on a new graphical user interface (GUI) to make configuration easer for my Software based DATV project. I been working with visual basic for Linux in the form of Gambas. By using this program it will let you select from four input types, file, v4l, PVR and a digital receiver. There are two output types local playback and UDP in a form of DVB transport steam sent via Ethernet. I am working on two levels of Mpeg encoding. One is using a standard PVR-150 cards with it's on board hardware chip for low CPU loading. The other is in software encoding mode where by you get better quality encoding but at cost of using up more CPU load. I have also add in a function to interface with DVB receiver cards such as the WinTV Nova S and the HVR 3000.
I have been working on a new software graphical user interface (GUI) to make configuration easier for my software based DATV project. I have been working with visual basic for Linux in the form of Gambas. This software program allows the selection of four input types: file(video files), v4l(web-cam), PVR (hardware encoders) and HVR (digital DVB) receivers. There are two output types for local playback and Ethernet (UDP) in a form of DVB transport steam. I am working with two types of Mpeg encoding. One uses a standard PVR-150 card with its on board hardware chip for low CPU loading. The other is in a software encoding mode where better quality encoding is achieved but at a cost of more CPU load. I have also added a function that interfaces with DVB receiver cards such as the WinTV Nova S and the HVR 3000.
This part of the software views an IP transport stream and receives the incoming video. This is done by setting up an input port and pushing the play button. This highlights the pause and stop buttons. 2ff7e9595c
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