6 replies to this topic

[Tim Long]

I have the ArduMoto shield and a Netduino Plus. I'm confused about how to configure things. I think this is just general confusion because I'm new to Netduino. The Netduino schematic calls the pins PB19 and PB20; CPU pins 64 and 65; Digital I/O 5 and 6. Does that mean I need to use Pins.GPIO_PIN_D5 and Pins.GPIO_PIN_D6? The ArduMoto board has PWMA on pin 3 and PWMB on pin 11 - confusion abounds! Does this mean the ArduMoto board isn't compatible with Netduino Plus? --Tim

[Justinius]

I don't have any experience with this shield, but I found a guy who does. http://forums.netdui...ndpost__p__9743 Hope that helps.

[Chris Walker]

Hi Timm, The AVR microcontroller used on the Arduino has 6 PWM. The ARM microcontroller used on the Netduino has 4 PWMs. The "outside 2" PWMs on the AVR (digital pins 3/11) are the two not enabled on the Netduino. We are working on a software PWM feature which will let the Netduino drive PWM signals in the background (at least one channel, maybe two)--which will enable PWM on those pins. Chris

[aalmada]

The ArduMoto board has PWMA on pin 3 and PWMB on pin 11 - confusion abounds! Does this mean the ArduMoto board isn't compatible with Netduino Plus?

--Tim

Hi Tim,

I made a few changes to the Ardumoto shield to make it compatible with the Netduino:

• Changed the V-Logic from 5V to 3.3V as the Netduino outputs 3.3V through the digital pins.
• Wired pin 3 to pin 5 and pin 11 to pin 6.
• Clipped the pins 3 and 11.

The only problem now is that pins 3 and 11 are disabled for shields above.
I've already asked for a PWM pins change in a next shield version. Please "star" the comments to show that other people would also like to have these changes: http://www.sparkfun.com/products/9815

aalmada

Attached Files

•  WP_000345_cropped.jpg   203.75KB   25 downloads
•  WP_000343_cropped.jpg   727.2KB   22 downloads

[aalmada]

The "Go-Between Shield" helps you with shield compatibility without having to cut and solder. http://www.sparkfun.com/products/11002

[Gutworks]

Hi Tim,

In addition to aalmada's post you may find this Netduino Wiki page helpful: Ardumoto Motor Driver Shield

Cheers and good luck!
Steve

[Chris Walker]

Also, the Shield Base has support for these additional two PWMs--presumably without needing to modify your shield. Chris