Totally incomprehensible. See my sig. below:
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On Thursday, in article
<KMidnTJuM53yIOfbnZ2dnUVZ_r2onZ2d@giganews.com>
stany_seong@yahoo.com "stanywong" wrote:
>Isit possible to interface the PCF8574 to the PC by using PIC18F4550
>through the build in USB function?
Probably.
> Since i would like to build the USB by using PIC18F4550 and interface
>to the PC.
Why?
> Is there any good application by using PCF8574 i2c chip?
Flash a LED, or read a switch, or read a switch to turn the LED On or Off.
No doubt there are spare pins on the PIC to do that anyway.
So why PCF8574?
So why connect to PC (except to load code into PIC or debug)?
Perhaps you should think of an application and then a way to solve
the application, rather than have the devices and make an application.
To connect an 8 bit input/output port to a PC can be done a lot simpler
if there was a need.
What do you need to do?
Other than what sounds like either a school project or 'I have found these
devices what can I build with them'.
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Reply by stanywong●June 21, 20072007-06-21
Isit possible to interface the PCF8574 to the PC by using PIC18F4550
through the build in USB function? Since i would like to build the USB by
using PIC18F4550 and interface to the PC. Is there any good application by
using PCF8574 i2c chip?