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I look for fans to use firmata (mainly 8bits users) - Printable Version

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I look for fans to use firmata (mainly 8bits users) - gtcbreizh - 12-01-2014

I would like to know if there are really guys who would use deeply and efficiently the firmata protocol, not only as a gadget to demonstrate the communication capabilities between a PC and a 8 bits mcu.
I explain my point of view as mainly up to now 8 bits user.
Working with Win7 I adapted the Arduino firmata to Pinguino IDE.
On the Web I found and adapted for the PC side a Python application (pcduino.py). For the moment the application is limited to output/input digitals and analogs without graphic use.
The exchanges are done thru USB (bulk mode - pyusb) instead of serial RS232, ftdi or CDC.
The basic tests (output/input digitals and analogs) are successful but also limited.
Servo or I2C applications can be planned if fans wish it.

Let me know your comments, ideas and needs on the topic.
André


RE: I look for fans to use firmata (mainly 8bits users) - dkmorb - 07-02-2014

(12-01-2014, 04:51 PM)gtcbreizh Wrote: Let me know your comments, ideas and needs on the topic.
André

Ok, I want to interface my c# application to build a simple oscilloscope...Is it a good idea to use Firmata protocol?


RE: I look for fans to use firmata (mainly 8bits users) - pingotg - 07-02-2014

Maybe use SUMP
http://www.sump.org/projects/analyzer/

John


RE: I look for fans to use firmata (mainly 8bits users) - gtcbreizh - 08-02-2014

(07-02-2014, 12:38 PM)dkmorb Wrote:
(12-01-2014, 04:51 PM)gtcbreizh Wrote: Let me know your comments, ideas and needs on the topic.
André

Ok, I want to interface my c# application to build a simple oscilloscope...Is it a good idea to use Firmata protocol?

I think Firmata protocol is too general for your project. You have to know Firmata is only a protocol to communicate between a PC and a microcontroller with digital/analog output/input capabilities (which can be extended to servo outputs and even to i2c exchanges).

For this project you certainly need a very very fast specialized communication between the MCU and the graphic PC application.

Could you develop more your targets ?

I suppose you already "googled" on the subject. If not, do it because there are numerous pages on oscilloscope project.

Very bald my project will be available for the 18f47j53 board and you will have a better idea relating Firmata protocol.
Good luck !
André


RE: I look for fans to use firmata (mainly 8bits users) - dkmorb - 08-02-2014

(07-02-2014, 03:06 PM)pingotg Wrote: Maybe use SUMP
http://www.sump.org/projects/analyzer/

John

Hey John,
what about http://www.semifluid.com/2006/05/01/pic18f2550-max114-4-channel-adc/ ?

Ok, we're OT...stop here! :-)


RE: I look for fans to use firmata (mainly 8bits users) - pingotg - 08-02-2014

Beats me how that would help.

John


RE: I look for fans to use firmata (mainly 8bits users) - gtcbreizh - 08-02-2014

(08-02-2014, 11:58 AM)dkmorb Wrote:
(07-02-2014, 03:06 PM)pingotg Wrote: Maybe use SUMP
http://www.sump.org/projects/analyzer/

John

Hey John,
what about http://www.semifluid.com/2006/05/01/pic18f2550-max114-4-channel-adc/ ?

Ok, we're OT...stop here! :-)

The "semifluid page" is very interesting relating to the data acquisition (hardware,serial transmission towards a RS232 terminal) but the graphical PC representation is totally missing. Look at Processing for this graphical treatment. Python library can help too.
André


RE: I look for fans to use firmata (mainly 8bits users) - pingotg - 08-02-2014

With SUMP all the host code already exists (& is open source) so why write it again?

John


RE: I look for fans to use firmata (mainly 8bits users) - gtcbreizh - 08-02-2014

(08-02-2014, 07:14 PM)pingotg Wrote: With SUMP all the host code already exists (& is open source) so why write it again?

John

Do you know the price for a Xilinx Spartan 3 FPGA to accompany SUMP ? 149 $ + shipping + custom taxes from US !!! (verified on Diligent site)
It is certainly a good and efficient stuff but not affordable for anybody.
No comments !
André


RE: I look for fans to use firmata (mainly 8bits users) - pingotg - 09-02-2014

You don't need any such device.

No FPGA at all is needed.

I think you've not understood SUMP etc.

John