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I think you will have to use D2XX drivers instead of the VCP driver.
The VCP driver emulates a COM port and that's why it will be listed as USB<>COM port.
Re: Strange PIC behavior
It probably has to do with what instructions the compiler generates for the while loop, there probably is a GOTO involved (which takes 2 cycles).
If you need perfect timing better do it in MPASM and count the clock cycles for each instruction.
Re: where to start learning about PIC's in this huge sea of
I agree the best place to start is 16F84, specifically, begin by reading it's manual which you can download from the Microchip web site.
Next you can build some simple project also available as application notes in Microchip's site...
mp3 chip decoder
If you want a real cheap MP3 player better go buy one retail.
I built an MP3 player and spent way more than a retail player would have costed.
If you still want to build one, a very good MP3 decoder is the VS1001.
This:
**broken link removed**
is a good place to start if you...
I have eight M58LW064D flash memory chips, they are 8 megs each for a total of 64 Megs.
The M58LW064D datasheet is here:
www.st.com/stonline/books/pdf/docs/8938.pdf
I have a 16 bit data bus in my mcu, and, as I stated, I need to connect 8 of these chips to the data bus.
The M58LW064D has 22...
I got a rom emulator which uses 72 pin SIMM memory.
It works ok with standard (non-edo) ram but has some timing problems with EDO memory that makes it lose it's contents.
The problem is I got some EDO SIMMs I'd like to use with it.
I attached the TDF file, can you help?
Thanks.
Protected EPM7128
I have a rom emulator which had a bad contact in it's SIMM socket.
I soldered the RAM to its socket and accidentally shorted 3 pins.
Some ports of the 7128 seem to have blown, since once I cleaned the solder (and replaced the SIMM socket) the device stopped working for good...
The 18F252 is a 16 bit device, you have to devine EEPROM data as WORDS using DW instead of BYTES that were defined using DB.
You can still access the high byte using LABEL + 1
For instance
DFIRM DW 00103H ; FIRMWARE RELEASE 3
DREV EQU DFIRM+1 ; REVISION: 1
When...
No big timing problems, PS/2 keyboard is syncronous, the interface uses 4 pins: 5V, GND, DATA (bidir) and CLOCK. The interface uses open collector with pullups. Never DRIVE this pins or you'll blow something. Best way is to keep the port LOW and invert it form input (HIGH via pullup) to outpt...
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