Weblog Ben’s HobbyCorner

Working with the FT232RL USB-chip. Theo Kleijn (www.pa0kn.nl) has made a small testboard with an Atmega32 and all I/O to a seperate LED. With the FTDI MPROG.EXE program I can change the use of the CBUS-connection of the FT232RL. Also the Atmega32 gets it clock from the CBUS4 connection of the FT232RL at 12 Mhz.

Now, with a Visual Basic program with the FTD2XX.DLL library it is possible to set and reset these four extra lines. Switching the DTR and RTS seperatly is still a problem, the first time we plug in the USB-cable everything is working fine, after that RTS and DTR won’t work. We need this to configure the AD9851 on the USBDRM. Have to send a 40 bit codestream and switch a 4017 for bandwidth selection.

Here he is, in a nice box, the Etherrape with I2c-module. 2 x PCF8574, 1 x PCF8583, 6 x opto-inputs, 4 x relay and a buzzer. Will continue the ENC28J60-tutorial with this nice device with Atmega644. Later on will add a SD-card.

Got a mail from -rdagger from the Comoros Islands. He has used my base-routines to make a Wake-On-Lan routine. Today he has send me a link to his website which shows a finished Wake-On-Lan board. And also a Magjack-adapter for prototyping. Nice to see the programming work turns into real hardware.

Link: http://www.rototron.info/?page=wol/wol.aspx

We are starting with the userinterface of the USBDRM. 10 sliders for 10 different bands. Selection will automatic be done with a 4017. 40 bit datastream will be send to the AD9851 with DTR (selection AD9851 or 4017 - their chip selection is opposite), RTS (data) and TXD (clock). And a very nifty way to reset the 4017 each time a different band is selected. There are still some minor problems we have to solve.

Telnet working on TuxGraphics board. A real TCP session with a real banner after the first connection.

DNS-request working. Build a small function for that. Have to examine the DNS-response I get.

In the mail, a WIZ810MJ-ethernet module. From www.circuitcellar.com Are planning to use a Atmega128 to drive the module. If you hurry you can still enter the contest and receive a free module.

USBDRM, a new design. No buttons, LCD or dial on the PCB, just a connection for USB, soundcard and antenna. All information will be visible in a Visual Basic program with the IOCOMP-library. The receiver is a double super 10.7 Mhz 455 kHz 12 kHz. DDS AD9851 will be programmed through a FT232RL, and after putting it on the right frequency a bandwith filter is automatic selected with a 4017. On this prototype this selection can be seen with a row of 10 LEDs.

Nice double sided PCB.