Ethernet shields, SPI and Macchina

This post will describe how to get Macchina talking with SPI shields, including Ethernet shields.

But first some Background:

When the Arduino Mega was introduced, for some reason, the SPI lines where in a different physical location than the Arduino UNO. This meant that several SPI-dependant shields were not compatible with both the Mega and the UNO without using some jumper wires.

MEGA SPI: 50 (MISO), 51 (MOSI), 52 (SCK), 53 (SS).

UNO SPI: 10 (SS), 11 (MOSI), 12 (MISO), 13 (SCK).

Our solution to get around this, and allow for more compatibility between the Macchina and shields, was to add some solder-jumpers to the Macchina board. Now one can easily swap the SPI lines depending on what sort of shield is attached.

Flash forward a few years and the SPI pins have not moved, BUT it seems as though the official solution to this was to use a down-ward facing 2X3 ICSP header to make connection to SPI pins on ALL Arduino boards.

While laying out Macchina, we moved the ISCP header to make room for all the extra automotive interface stuff. This alone would not be an issue, except for the fact that some new shields (the Arduino Ethernet Shield for example) ONLY has these SPI pins on the down-ward facing ISCP header and no where else. This is an issue, a known issue.

Work-arounds are as follows:

1. If using the Official Ethernet shield: Need to add jumper wires to make correct connections. There are many ways to accomplish this including this solution that connects wires from the ICSP header to the side headers. Some soldering required.

2. Is using SEEEDSTUDIO's Ethernet Shield: Need to re-route the SPI lines by using the easier-to-do-than-soldering-wires method shown here:

Side note: Both of these boards are sold at Radioshack (!?) for about $32.

3. If using the Sparkfun-branded Ethernet Shield: No modifications necessary since wires are going directly to the SPI pins on the side headers.

Regardless of which of these shields are used, the solder jumpers on the Macchina must be set as follows:

Once hardware modifications are done, plug the shield into the Macchina and get coding!

A good first test would be to try out is the built-in example called "WebServer" that comes with the standard Arduino IDE.

Lastly, a note regarding SPI:

The CAN interface also uses SPI to communicate with the microcontroller. While the hardware is set up correctly (SS (chip select) for the CAN controller is connected to a un-used pin on microcontroller, special care must be taken with the code to ensure communication between Ethernet Microcontroller and CANBUS Microcontroller is handled correctly.

Comments

Submitted by seoo on Tue, 10/04/2022 - 06:43

Pretty good post. I just stumbled upon your blog and wanted to say that I have really enjoyed reading your blog posts. Any way I'll be subscribing to your feed and I hope you post again soon. Big thanks for the useful info.This site seems to get a good amount of visitors.  best mushroom extracts

Submitted by seoo on Tue, 10/04/2022 - 06:45

We have sell some products of different custom boxes.Thanks for posting this info. I just want to let you know that I just check out your site and I find it very interesting and informative. I can't wait to read lots of your posts.This is very educational content and written well for a change. It's nice to see that some people still understand how to write a quality post! Michigan Microsoft 365 consultant

Submitted by seoo on Tue, 10/04/2022 - 11:59

Really i am impressed from this post....the person who create this post it was a great human..thanks for shared this with us.Nice post! This is a very nice blog that I will definitively come back to more times this year! Thanks for informative post.Very informative post! There is a lot of information here that can help any business get started with a successful social networking campaign.I was reading some of your content on this website and I conceive this internet site is really informative ! Keep on putting up.This is such a great resource that you are providing and you give it away for free.Positive site, where did u come up with the information on this posting? I'm pleased I discovered it though, ill be checking back soon to find out what additional posts you include. cooe

Submitted by seoo on Wed, 10/05/2022 - 11:29

When your website or blog goes live for the first time, it is exciting. That is until you realize no one but you and your.Great job for publishing such a beneficial web site. Your web log isn’t only useful but it is additionally really creative too.Thank you because you have been willing to share information with us. we will always appreciate all you have done here because I know you are very concerned with our. automotive lead generation

Submitted by seoo on Wed, 10/05/2022 - 11:35

Hello, this weekend is good for me, since this time i am reading this enormous informative article here at my home.This is my first time i visit here. I found so many interesting stuff in your blog especially its discussion. From the tons of comments on your articles, I guess I am not the only one having all the enjoyment here keep up the good workI wanted to thank you for this great read!! I definitely enjoying every little bit of it I have you bookmarked to check out new stuff you post.Thank you because you have been willing to share information with us. we will always appreciate all you have done here because I know you are very concerned with our. colour prediction app

Submitted by seoo on Wed, 10/05/2022 - 14:29

We have sell some products of different custom boxes.Thanks for posting this info. I just want to let you know that I just check out your site and I find it very interesting and informative. I can't wait to read lots of your posts.This is very educational content and written well for a change. It's nice to see that some people still understand how to write a quality post! pets etc..

Submitted by seoo on Thu, 10/06/2022 - 08:58

I just found this blog and have high hopes for it to continue. Keep up the great work, its hard to find good ones. I have added to my favorites. Thank You.Superbly written article, if only all bloggers offered the same content as you, the internet would be a far better place.. كورة

Submitted by seoo on Thu, 10/06/2022 - 12:30

I would like to thank you for the efforts you have made in writing this article. I am hoping the same best work from you in the future as well. Thanks...I really loved reading your blog. It was very well authored and easy to undertand. Unlike additional blogs I have read which are really not tht good. I also found your posts very interesting. In fact after reading, I had to go show it to my friend and he ejoyed it as well! Gluten free catering

Submitted by seoo on Thu, 10/06/2022 - 12:36

Awesome article, it was exceptionally helpful! I simply began in this and I'm becoming more acquainted with it better! Cheers, keep doing awesome!Really i am impressed from this post....the person who create this post it was a great human..thanks for shared this with us.I love seeing blog that understand the value of providing a quality resource for free.I’m going to read this. I’ll be sure to come back. thanks for sharing. and also This article gives the light in which we can observe the reality. this is very nice one and gives indepth information. thanks for this nice article...I’m going to read this. I’ll be sure to come back. thanks for sharing. and also This article gives the light in which we can observe the reality. this is very nice one and gives indepth information. thanks for this nice article... codice vin auto

Submitted by seoo on Fri, 10/07/2022 - 02:18

Very good points you wrote here..Great stuff...I think you've made some truly interesting points.Keep up the good work.Really a great addition. I have read this marvelous post. Thanks for sharing information about it. I really like that. Thanks so lot for your convene.I learn some new stuff from it too, thanks for sharing your information.I learn some new stuff from it too, thanks for sharing your information.  Buy CBD Hemp Flower online

Submitted by seoo on Fri, 10/07/2022 - 02:29

I love seeing blog that understand the value of providing a quality resource for free.I can see that you are an expert at your field! I am launching a website soon, and your information will be very useful for me.. Thanks for all your help and wishing you all the success in your business. rollover iras

Submitted by seoo on Fri, 10/07/2022 - 04:58

Great write-up, I am a big believer in commenting on blogs to inform the blog writers know that they’ve added something worthwhile to the world wide web!..This is just the information I am finding everywhere. Thanks for your blog, I just subscribe your blog. This is a nice blog..I just found this blog and have high hopes for it to continue. Keep up the great work, its hard to find good ones. I have added to my favorites. Thank You.I really loved reading your blog. It was very well authored and easy to understand.  blog

Submitted by seoo on Fri, 10/07/2022 - 08:46

A very awesome blog post. We are really grateful for your blog post. You will find a lot of approaches after visiting your post.Positive site, where did u come up with the information on this posting?I have read a few of the articles on your website now, and I really like your style. Thanks a million and please keep up the effective work. Marina Maldives speedboat Transfer

Submitted by seoo on Sat, 10/08/2022 - 14:33

We are really grateful for your blog post. You will find a lot of approaches after visiting your post. I was exactly searching for. Thanks for such post and please keep it up. Great work.Great job for publishing such a beneficial web site. Your web log isn’t only useful but it is additionally really creative too.Thank you because you have been willing to share information with us. we will always appreciate all you have done here because I know you are very concerned with our.Very informative post! There is a lot of information here that can help any business get started with a successful social networking campaign. buy hydrocodone online

Submitted by seoo on Wed, 10/12/2022 - 12:02

Very informative post! There is a lot of information here that can help any business get started with a successful social networking campaign.Yes i am totally agreed with this article and i just want say that this article is very nice and very informative article.I will make sure to be reading your blog more. You made a good point but I can't help but wonder, what about the other side? !!!!!!THANKS!!!!!! Estate Agents in Woodbridge

Submitted by seoo on Thu, 10/13/2022 - 11:35

i love reading this article so beautiful!!great job!Great Information sharing .. I am very happy to read this article .. thanks for giving us go through info.Fantastic nice. I appreciate this post. Great write-up, I am a big believer in commenting on blogs to inform the blog writers know that they’ve added something worthwhile to the world wide web!..I appreciate everything you have added to my knowledge base.Admiring the time and effort you put into your blog and detailed information you offer.Thanks. custom silicone molds

Submitted by seoo on Thu, 10/13/2022 - 11:42

I wanted to thank you for this excellent read!! I definitely loved every little bit of it. I have you bookmarked your site to check out the new stuff you post.Wow, What a Excellent post. I really found this to much informatics. It is what i was searching for.I would like to suggest you that please keep sharing such type of info.Thanks acheter followers instagram

Submitted by seoo on Thu, 10/13/2022 - 11:50

I found so many interesting stuff in your blog especially its discussion. From the tons of comments on your articles, I guess I am not the only one having all the enjoyment here! keep up the good work...I learn some new stuff from it too, thanks for sharing your information. Vehicle hire caerphilly

Submitted by seoo on Fri, 10/14/2022 - 08:35

Really i am impressed from this post....the person who create this post it was a great human..thanks for shared this with us.Nice post! This is a very nice blog that I will definitively come back to more times this year! Thanks for informative post.Very informative post! There is a lot of information here that can help any business get started with a successful social networking campaign.I was reading some of your content on this website and I conceive this internet site is really informative ! Keep on putting up.This is such a great resource that you are providing and you give it away for free.Positive site, where did u come up with the information on this posting? I'm pleased I discovered it though, ill be checking back soon to find out what additional posts you include. coweta eye care

Submitted by seoo on Fri, 10/14/2022 - 12:13

Pretty good post. I just stumbled upon your blog and wanted to say that I have really enjoyed reading your blog posts. Any way I'll be subscribing to your feed and I hope you post again soon. Big thanks for the useful info.  vog aanvragen

Submitted by seoo on Sat, 10/15/2022 - 01:09

I can see that you are an expert at your field! I am launching a website soon, and your information will be very useful for me.. Thanks for all your help and wishing you all the success in your business.You are truly well informed and very intelligent. You wrote something that people could understand and made the subject intriguing for everyone. Really, great blog you have got here.Nice knowledge gaining article. This post is really the best on this valuable topic.This is my first time visit here. From the tons of comments on your articles,I guess I am not only one having all the enjoyment right here! Car Recovery Service

Submitted by phg011 on Tue, 10/18/2022 - 22:22

This particular is usually apparently essential and moreover outstanding truth along with for sure fair-minded and moreover admittedly useful My business is looking to find in advance designed for this specific useful stuffs<a href="https://www.nomukti1.com/" target="_blank" title="토토검증사이트">토토검증사이트</a><br>

Submitted by seoo on Wed, 10/19/2022 - 01:44

This is my first time visit here. From the tons of comments on your articles,I guess I am not only one having all the enjoyment right here!I havent any word to appreciate this post.....Really i am impressed from this post....the person who create this post it was a great human..thanks for shared this with us.I know your expertise on this. I must say we should have an online discussion on this. Writing only comments will close the discussion straight away! And will restrict the benefits from this information. bitpanda

Submitted by seoo on Wed, 10/19/2022 - 07:03

If you are looking for more information about flat rate locksmith Las Vegas check that right away.Very efficiently written information. It will be beneficial to anybody who utilizes it, including me. Keep up the good work. For sure i will check out more posts. This site seems to get a good amount of visitors. car dealer near me

Submitted by seoo on Wed, 10/19/2022 - 15:34

I admire this article for the well-researched content and excellent wording. I got so involved in this material that I couldn’t stop reading. I am impressed with your work and skill. Thank you so much.When your website or blog goes live for the first time, it is exciting. That is until you realize no one but you and your. 316 vs 304 Stainless Steel

Submitted by seoo on Thu, 10/20/2022 - 05:08

I just found this blog and have high hopes for it to continue. Keep up the great work, its hard to find good ones. I have added to my favorites. Thank You.Interesting topic for a blog. I have been searching the Internet for fun and came upon your website. Fabulous post. Thanks a ton for sharing your knowledge! It is great to see that some people still put in an effort into managing their websites. I'll be sure to check back again real soon.I can see that you are an expert at your field! I am launching a website soon, and your information will be very useful for me.. Thanks for all your help and wishing you all the success in your business. Corten Steel Planter

Submitted by seoo on Sat, 10/22/2022 - 08:19

I appreciate everything you have added to my knowledge base.Admiring the time and effort you put into your blog and detailed information you offer.Thanks.I learn some new stuff from it too, thanks for sharing your information.Please continue this great work and I look forward to more of your awesome blog posts.Nice knowledge gaining article. This post is really the best on this valuable topic.This is my first time visit here. From the tons of comments on your articles,I guess I am not only one having all the enjoyment right here!  카지노사이트

Submitted by seoo on Sat, 10/22/2022 - 12:59

This type of message always inspiring and I prefer to read quality content, so happy to find good place to many here in the post, the writing is just great, thanks for the post.Yes i am totally agreed with this article and i just want say that this article is very nice and very informative article.I will make sure to be reading your blog more. You made a good point but I can't help but wonder, what about the other side? !!!!!!Thanks Asheville

Submitted by seoo on Sun, 10/23/2022 - 04:39

Yes i am totally agreed with this article and i just want say that this article is very nice and very informative article.I will make sure to be reading your blog more. You made a good point but I can't help but wonder, what about the other side? !!!!!!ThanksThank you because you have been willing to share information with us. Gadgets

Submitted by seoo on Tue, 10/25/2022 - 08:00

Positive site, where did u come up with the information on this posting? I'm pleased I discovered it though, ill be checking back soon to find out what additional posts you include.Yes i am totally agreed with this article and i just want say that this article is very nice and very informative article.I will make sure to be reading your blog more. You made a good point but I can't help but wonder, what about the other side? !!!!!!Thanks Photography

Submitted by seoo on Wed, 10/26/2022 - 04:24

I think this is an informative post and it is very useful and knowledgeable. therefore, I would like to thank you for the efforts you have made in writing this article.Thank you because you have been willing to share information with us. we will always appreciate all you have done here because I know you are very concerned with our.   Naturewell

Submitted by seoo on Wed, 10/26/2022 - 04:59

Wow i can say that this is another great article as expected of this blog.Bookmarked this site..The website is looking bit flashy and it catches the visitors eyes. Design is pretty simple and a good user friendly interface.I wanted to thank you for this excellent read!! I definitely loved every little bit of it. I have you bookmarked your site to check out the new stuff you post. hotel in israel

Submitted by seoo on Sat, 10/29/2022 - 20:11

Really I enjoy your site with effective and useful information. It is included very nice post with a lot of our resources.thanks for share. i enjoy this post.Anyways I am here now and could just like to say thank for a tremendous post and a all round entertaining website. Please do keep up the great work.   카지노사이트

Submitted by ZooneZoone on Mon, 10/31/2022 - 16:27

Hello There. I found your blog using msn. This is an extremely well written article. I will be sure to bookmark it and return to read more of your useful information. Thanks for the post. I'll certainly comeback. Zonnepanelen Lennik

Submitted by ZooneZoone on Mon, 10/31/2022 - 16:31

Impressive web site, Distinguished feedback that I can tackle. Im moving forward and may apply to my current job as a pet sitter, which is very enjoyable, but I need to additional expand. Regards. Warmtepompen

Submitted by ZooneZoone on Mon, 10/31/2022 - 16:38

Pretty good post. I have just stumbled upon your blog and enjoyed reading your blog posts very much. I am looking for new posts to get more precious info. Big thanks for the useful info. Warmtepomp

Pages