gnupic: blinking leds with usb port
Subject:
Re: blinking leds with usb port
From:
KHMan ####@####.####
Date:
1 Mar 2013 09:11:09 -0000
Message-Id: <513070A4.9010004@gmail.com>
On 3/1/2013 4:35 PM, Remco Boom wrote:
> Actually there is a easy solution
>
> Look at this product UM232H-B Datasheet
> <http://www.ftdichip.com/Support/Documents/DataSheets/Modules/DS_UM232H-B.pdf>
>
> http://www.ftdichip.com/Products/Modules/DevelopmentModules.htm
>
> You can use the io in a serial way but also parallel
But FTDI parts are more often available as modules, boards (more
costly) or bare TQFP (more difficult).
A PIC18F13K50 is likely cheaper, or wait a bit and get
PIC16F1454/5/9, probably even cheaper and you can even drop the
crystal/resonator. Most importantly, it's easy to buy a wide range
of PICs from the large electronics warehouse stores.
There is also MCP2200 and MCP2210, but they are I think the same
silicon with a custom program. I took a long look at them for
cheapo USB hobbyist projects but decided to buy PIC18F14K50 so I
can use all the peripherals.
> On 02/28/2013 06:05 PM, Joe Pfeiffer wrote:
>> Byron Jeff writes:
>>> The problem with both of these options is the chicken and egg
>>> problem of
>>> programming the PIC. It instantly stops being a low cost, low
>>> hassle
>>> project if you have to order and purchase a programmer. One of
>>> my long
>>> standing projects has been low cost easy to build "code
>>> dumpers" that could
>>> be used to drop a bootloader onto a self programmable PIC. Then
>>> the
>>> bootloaded PIC can be used with an appropriate interface for
>>> continued
>>> programming. The parallel port was the best port for this type
>>> of activity.
>>> Sadly it, and serial ports (with the exception of USB to
>>> serial), a rarely
>>> available in modern machines.
>> It is too bad there is no modern equivalent of a parallel port for
>> exactly this sort of project. But that's the only thing I miss
>> about
>> it!
>>
>> A PICkit 2 programmer costs under $50 and integrating the needed
>> six
>> (really five) pin connector into your project is dead easy. To me,
>> that seems to meet any reasonable definition of "low cost, low
>> hassle".
--
Cheers,
Kein-Hong Man (esq.)
Kuala Lumpur, Malaysia
