[time-nuts] Good (cheap) PIC chip choice for project?
herbert at 13thfloor.at
Sat May 25 22:20:31 EDT 2013
On Sat, May 25, 2013 at 10:04:59PM -0400, Bob Camp wrote:
> If you are putting money into a Microchip programmer, I'd
> probably head over to the PIC Kit 3 rather than the 2. It will
> do debug as well as programming on the range of parts.
Unfortunately the command line support is missing in the
PICkit 3, although there was/is an efford to make the 'new'
PICkit 3 compatible with the PICkit 2.
(as usualy, marketing decisions ... :)
And the PICkit 2 can do all the debugging the PICkit 3
does plus it can work as UART and Logic Analyzer as well.
> Having breakpoints and debug is a *good* thing.
Depends, using breakpoints and/or debug on time critical
stuff (like software PWM or UART) usually results in
unexpected results, more often it is simpler to add one
or more LEDs to display a state or do 'printf' style
debugging via serial (UART/I2C/SPI).
But as always, YMMV.
> On May 25, 2013, at 9:44 PM, Herbert Poetzl <herbert at 13thfloor.at> wrote:
>> On Sat, May 25, 2013 at 08:46:03AM -0500, Jason Rabel wrote:
>>> I've decided I finally want to tackle learning how to use a PIC
>>> chip for some smaller projects. Can someone recommend me a good
>>> (and cheap) PIC, and possible some literature (be it a book or
>>> website)? I have a fairly recent willem eprom programmer that
>>> I'm hoping I can use.
>> Microchip has good product selection tools like this one:
>> (note the plus signs on the right side of each section)
>>> I don't know what all the features PICs have, but for my first
>>> project I would like to have it connected to a serial port on
>>> one of my Soekris' where it can grab info (i.e. the current
>>> time, or NTP/GPS info) and output that on a little LED display.
>> Depending on the type of LED display you have in mind, you
>> want to have PWM capabilities (multiplexing) and high
>> current source/sink, as well as an (E)U(S)ART for the serial
>> A four digit LED display can be easily controlled by a
>> PIC16F1503 (price about 0.8 USD, 14 pins) and the required
>> documents are available on the Microchip site:
>> You can do the UART part in software for low data rates
>> or simply take the PIC16F1508/9 which already includes
>> an EUSART (price about 1.3 USD, 20 pins)
>> One programmer for many PIC chips (8 bit to 32 bit) is
>> the PICkit2 which can be bought for less than 30 USD
>> (via usb, works fine on Linux and MacOS as well)
>>> time-nuts mailing list -- time-nuts at febo.com
>>> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>>> and follow the instructions there.
>> time-nuts mailing list -- time-nuts at febo.com
>> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>> and follow the instructions there.
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
More information about the time-nuts