Hi all, I am trying to implement USB to RS232 converter using DLP2232M module which uses FT2232C(FTDI chip). This I am using with PIC16F877A. My connections are for USB self-powered configuration ( pins 17,18,19 connected to external +5V, while pins 22,23,24,25 are grounded). I have downloaded Combined Driver Model CDM 2.00 from FTDI website, unzipped and installed. On hooking the circuit to the PC, the PC detects it and after installation, it recognises the module as USB serial converter A and USB serial converter B. But the device is not listed as virtual com port like com2,com3 or com4 so that it can be used as RS232 port. What could be the problem? Any suggestions to make the DLP2232M to work? Thanks in advance
I have such a device too because i'll try to build a USB JTAG device for a ARM7 (AT91R40008) according to http://www.fh-augsburg.de/~hhoegl/proj/usbjtag/usbjtag.html But i havn't yet started the project. Maybe your question is a good starting point ;-) "Combined driver model (D2XX and VCP). Devices programmed as VCP will expose a COM port, as will AM and BM devices." http://www.ftdichip.com/Drivers/D2XX.htm But as far as i understand: You have to program/configure the device first as VCP and then it will expose a virtual COM on PC. OR you can overwrite the device setting with a property page of the combined device drivers. Configuration of the device via EEPROM: ======================================= WARNING - WARNING - WARNING - WARNING - WARNING - WARNING - WARNING - WARNING "If you are unsure about any of the features described in this document, please do not change any of your driver files or registry settings and seek assistance from FTDI Support." http://www.ftdichip.com/Documents/AppNotes/AN232B-10_Advanced_Driver_Options.pdf WARNING - WARNING - WARNING - WARNING - WARNING - WARNING - WARNING - WARNING "The EEPROM is programmable in-circuit via USB using a utility program available from both FTDI
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