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 seth65475 on Wed, 01/22/2025 - 09:47

I have to convey my respect for your kindness for all those that require guidance on this one field. Your special commitment to passing the solution up and down has been incredibly functional and has continually empowered most people just like me to achieve their dreams. Your amazing insightful information entails much to me and especially to my peers. Thanks a ton; from all of us. the blog pocketmemoriesnet site

Submitted by seth65475 on Mon, 02/10/2025 - 00:52

Polyva’s research and development efforts continue to push the boundaries of water-soluble film technology. Their commitment to quality and sustainability ensures that industries receive the best possible packaging solutions. pva film

Submitted by seth65475 on Sun, 02/16/2025 - 11:39

The 1xCasino promo code 2025: "1XBUM" welcome bonus is 100% up to €2205 and 75 Free Spins No Deposit Bonus. You need to register, confirm your email and enter bonus code. Register a new account with 1xCasino using the code and enjoy 100 free spins at registration. 1xcasino promo code in india 

Submitted by seoo on Wed, 02/19/2025 - 03:18

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.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. Arina East Residences

Submitted by seoo on Sat, 03/01/2025 - 07:06

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.Hello, this weekend is good for me, since this time i am reading this enormous informative article here at my home.   affinity bot ai

Submitted by seth65475 on Mon, 03/03/2025 - 09:25

There are media reviews concerning the constructive influence that exploration about wire body stem tissues is actually obtaining on the destin breast enhancement probable get rid of intended for a lot of life looking set disorders. However the right various stories about this or factions it can be out of the question in order to focus on most of it is valuable facts. Come cells display an incredible degree of plasticity resulting in they’ll crank out and also regenerate towards many types of solar cells and in many cases internal organs within just in the physique. Probably, in case they can be removed from the particular donor in addition to transfused to the affected person and then later on, stem tissue could be utilized to treatment every sickness. https://justicelanow.org/art/Crazy_Pachinko_Game_The_Wildest_Arcade_Experience.html 

Submitted by mrswinters on Wed, 03/05/2025 - 19:50

This.. To make life easier for everyone, we added solder jumpers to the Macchina board. This lets you reroute the SPI lines, so you can easily switch them around depending on the shield you're using. Just configure the jumpers to match the SPI pinout of the shield you're attaching, and you should be good to go! This makes the Macchina way more versatile and compatible with a wider range of shields. Aimee W./ https://www.penrithrenovations.com.au/

Submitted by seth65475 on Sun, 03/09/2025 - 01:17

Genron Truck Trailer is a game-changer in the transportation industry! Their high-quality trailers are built to last, ensuring durability and excellent performance. If you're looking for reliable truck trailers for heavy loads, this company is worth checking out! Genron

Submitted by seth65475 on Thu, 03/13/2025 - 00:41

Get affordable guest post backlinks and improve your Google ranking with our best guest post service. We provide best SEO backlink services, allowing you to buy backlinks and gain guest post backlinks for ranking from trusted sources. quality link building 

Submitted by seth65475 on Wed, 03/19/2025 - 01:02

Get the latest entertainment news and movie reviews at HDHub4u. We provide detailed critiques of films across genres, from action-packed thrillers to emotional dramas. No illegal downloads—just honest movie discussions! Hdhub4u in 

Submitted by theshailla on Thu, 03/20/2025 - 04:45

To make life easier, the Macchina has solder jumpers that let you re-route the SPI lines. This means you can configure the Macchina to match either the Mega or Uno SPI pinout, depending on the shield you're using. Just take a look at the board and adjust the jumpers to match the SPI configuration of your shield. This should solve most compatibility issues with SPI shields, including those Ethernet shields.  S. B. (CEO) https://monarchconstructions.com.au/

Submitted by seth65475 on Sat, 03/29/2025 - 01:01

My husband and i got now thrilled  Edward managed to finish off his researching while using the ideas he gained out of the web site. It’s not at all simplistic to just continually be giving out ideas which usually some people have been selling. And we consider we now have you to give thanks to because of that. The type of explanations you’ve made, the easy blog menu, the friendships you aid to instill – it’s everything powerful, and it is helping our son in addition to our family imagine that the situation is excellent, and that is incredibly pressing. Thanks for all! luxury138 

Submitted by seth65475 on Wed, 04/02/2025 - 03:40

Live hash rosin gummies from MKX are some of the best cannabis edibles I have ever had These gummies are made using high quality live hash rosin which enhances the flavor and effects I love the smooth taste and the fact that they provide a strong yet balanced high The effects kick in at just the right time making them perfect for relaxation and stress relief I have tried many cannabis gummies but these are definitely among my favorites MKX has done an amazing job with this product MKX Carts

Submitted by seth65475 on Mon, 04/07/2025 - 00:43

Eu não fazia ideia de que os backups do WhatsApp não ficam armazenados para sempre no Google Drive! Seu artigo trouxe informações muito importantes. Agora, vou me lembrar de fazer backup regularmente para não correr o risco de perder minhas conversas. Obrigado por explicar tudo tão bem! como fazer backup no WhatsApp

Submitted by seth65475 on Mon, 04/07/2025 - 01:16

I've bookmarked your site for future reference. The blend of technical info and practical applications is perfect for anyone researching before buying. This shows you know your audience well. Golden Bake

Submitted by seth65475 on Wed, 04/09/2025 - 05:39

Awesome and really informative post here.  I very much am into sites that have to do with building muscle, so this is refreshing to me to discover what you have here.  Keep up the great work!  how to lose weight fast 에볼루션 슬롯 

Submitted by seth65475 on Thu, 04/10/2025 - 07:10

MazgTV deserves way more recognition. I’ve used many sites over the years, but none come close to the quality and reliability of this one. Please don’t stop what you’re doing! 스포츠중계

Submitted by seth65475 on Sat, 04/12/2025 - 03:35

Great site! I ordered a cozy blanket and a chew toy for my dog, and both arrived in perfect condition. The material of the blanket is super soft and the toy is surprisingly durable. A+ for quality and service. cat tower

Submitted by seth65475 on Sun, 04/20/2025 - 03:12

Your website is very user-friendly, and I love how detailed the product descriptions are. It gave me a clear idea of what to expect. I appreciated the breakdown of the dosage too. Very helpful for someone new to shroom edibles! shroom chocolate

Submitted by seth65475 on Wed, 04/23/2025 - 08:10

Whether I’m at home or on the go, MazgTV works flawlessly on my laptop and phone. It’s responsive and mobile-friendly, which is perfect for busy fans like me. You guys are doing a fantastic job! 무료중계

Pages