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 Thu, 05/29/2025 - 08:17

An interesting discussion may be worth comment. There’s no doubt that you should write on this topic, it will not be a taboo subject but generally folks are inadequate to speak on such topics. Yet another. Cheers kyototo

Submitted by seth65475 on Sun, 06/01/2025 - 08:00

Slots are more than just games—they're a digital canvas for creativity. Developers infuse each title with stunning visuals, captivating soundtracks, and cleverly designed features. From charming animations to story-driven sequences, slots can feel more like a short film than a casino game. slot 5000

Submitted by seth65475 on Tue, 06/03/2025 - 03:17

종합적으로 볼 때 뉴헤븐카지노는 단순한 온라인 카지노 사이트가 아니라, 사용자에게 신뢰할 수 있는 엔터테인먼트 공간을 제공하는 종합 플랫폼입니다. 안정성, 다양성, 접근성, 그리고 고객 중심의 운영까지 모든 면에서 높은 완성도를 자랑하며, 기존의 온라인 카지노 서비스들과는 차별화된 경험을 제공합니다. 지금 뉴헤븐카지노를 방문하면 단순한 게임 이상의 가치를 느낄 수 있을 것입니다. 매일이 새롭고, 매 순간이 즐거운 카지노 경험을 원한다면 뉴헤븐카지노는 최적의 선택이 될 것입니다. 뉴헤븐카지노

Submitted by seth65475 on Tue, 06/03/2025 - 08:32

What keeps me coming back to this casino is the live dealer section. It's the closest thing to the real Vegas experience. The dealers are professional and friendly, and the video quality is excellent. Truly immersive. garuda303 

Submitted by seth65475 on Fri, 06/06/2025 - 04:21

The essence of gambling lies in uncertainty. It’s an experience where you can’t control the outcome, only influence it slightly—through choice of game, strategy, or bet size. This lack of control can be both liberating and terrifying. For many, it’s the excitement of the unknown that makes gambling irresistible. That split-second between action and result is where all the magic—or regret—happens. And while some walk away with winnings, others leave with hard-learned lessons.    [url=https://csvrxviagra.com/]kilau4d[/url] 

Submitted by seth65475 on Fri, 06/06/2025 - 06:41

Floating-Fender.com specializes in designing next-generation marine fenders that are capable of withstanding extreme maritime environments. Their pneumatic and foam-filled fenders serve as vital components for ship docking and terminal protection, with proven performance across industries such as oil and gas, military logistics, and container shipping. These fenders not only offer excellent energy absorption but also feature resistance to environmental degradation, ensuring safe and smooth vessel operations around the clock. Henger Shipping Supplies

Submitted by seth65475 on Tue, 06/10/2025 - 02:58

As internet technology advances, online gambling continues to gain popularity around the world. Players enjoy the luxury of gambling on their own schedule, with games that range from high-stakes poker to simple slots. Online platforms offer immersive graphics, sound effects, and bonus features that rival physical casinos. The social aspect is also growing, with multiplayer games, chat rooms, and live dealers creating a community feel. Many platforms use blockchain technology and cryptocurrencies, offering anonymous and secure transactions. While it's exciting to gamble online, users should be educated about responsible gambling and understand the risks involved in excessive play. luxury777 login 

Submitted by seth65475 on Thu, 06/12/2025 - 05:10

What sets Pusat4D apart from the rest? It’s the combination of variety, security, and constant innovation. The platform regularly updates its offerings to include the latest lottery trends, while also providing educational tools for beginners. Sign up today and explore a smarter way to bet. pusat4d 

Submitted by seth65475 on Sat, 06/14/2025 - 01:20

Toko CCTV Tulungagung has become the preferred CCTV store in the region, known for its reliable products, competitive prices, and responsive customer support. Whether you're upgrading or installing a new system, they make the process seamless. pasang cctv tulungagung 

Submitted by seth65475 on Sat, 06/14/2025 - 05:17

A licensed agen slot gacor will not only lead you to lucky slot games but also protect your account, secure your money, and give you fair chances to win. They usually partner with top gaming platforms that offer certified results. agen slot online 

Submitted by seth65475 on Tue, 06/17/2025 - 06:31

Gambling promises quick rewards, but long-term success in life usually comes from patience, hard work, and discipline. It’s a lesson worth remembering every time you’re tempted to bet bigger. slot mahjong ways 2

Submitted by seth65475 on Sat, 06/21/2025 - 04:35

This salon redefines what a relaxing night out feels like. With private rooms and a stunning interior, it’s designed for total relaxation. The Magic Mirror Room technology adds a visual charm while keeping things classy. If you want elegance without the noise of typical venues, this is your go-to spot. 강남풀싸롱

Submitted by seth65475 on Sun, 06/22/2025 - 07:33

Checking hollypenfield.com, I expected music or something creative but found an online lottery platform. The design isn’t bad, and there’s plenty of betting content, but the domain name is misleading. This shift in site identity can confuse users or even make them feel tricked. When a domain doesn’t match its content, it’s a red flag. Always double-check the legitimacy and safety of such platforms before giving out information or money. It’s better to be cautious than sorry. dancebet 

Submitted by seth65475 on Thu, 06/26/2025 - 07:26

Practice makes progress, and this tech education platform gives you the opportunity to do just that. Rather than relying on lectures alone, it provides task-oriented lessons where you code along and build real solutions. From the basics of frontend development to server-side logic and data storage, you’ll move through each level with clarity and purpose. You won’t just learn what to do—you’ll discover how and why. The goal is to help learners make consistent, meaningful strides in their tech journey, with a clear roadmap and real support every step of the way. learn linux

Submitted by seth65475 on Sat, 06/28/2025 - 06:14

The nicotine salt formula doesn’t feel too harsh, but it gives a satisfying throat hit that feels genuine—helps me shake my cigarettes habit more easily. Fum vape 

Submitted by seth65475 on Thu, 07/03/2025 - 03:33

The site’s photos and descriptions truly match the product you receive — no surprises, just pure satisfaction. I love the transparency and honesty in your branding. I’ve been disappointed by other resortwear brands before, but AU Resortwear completely restored my trust in online fashion. click here 

Submitted by labcytotec on Sat, 07/12/2025 - 01:57

https://medium.com/@smkperikanannusantarademak/pengalaman-pakai-cytotec-...https://bumilgenz.blogspot.com/2025/06/obat-penggugur-kandungan.htmlhttps://bidanvera.wordpress.com/2025/06/28/cara-pakai-cytotec-untuk-meng...https://sites.google.com/view/cytotecaslivspalsu/https://labcytotec.tumblr.com/post/787671374933164032/apa-cytotec-aman-p...https://labcytotec.weebly.com/https://masriyo.livejournal.com/268.htmlhttps://labcytotec.jimdofree.com/https://085713334551.webnode.page/https://linksta.cc/@caramenggugurkanhttps://its-my.link/@caramenggugurkanhttps://magic.ly/caramenggugurkankandunganhttps://artistlink.xyz/@caramenggugurkanhttps://link4u.cc/@caramenggugurkanhttps://cccv.to/caramenggugurkanhttps://direct.me/caramenggugurkanhttps://linku.su/caramenggugurkanhttps://linkfast.me/caramenggugurhttps://lhub.to/caramenggugurkanhttps://linktr.ee/caramenggugurkankandunganhttps://lnk.bio/caramenggugurkankandunganhttps://sites.google.com/view/obatmiso/

Submitted by seth65475 on Sun, 07/13/2025 - 02:28

Many patients feel that doxycycline ruined my life because they were not properly warned about the risks. From anxiety and insomnia to severe digestive problems, they feel the side effects were downplayed by healthcare providers. doxycycline side effects 

Submitted by seth65475 on Sun, 07/13/2025 - 05:39

The 3-kilometer-long outer walls of Sindhudurg Fort were built to blend naturally with the rocky surroundings. Even centuries later, they stand firm, narrating tales of valor, defense, and maritime ambition. sindhudurg fort 

Submitted by labcytotec on Tue, 07/15/2025 - 01:17

https://nahelindopratama.com/profile/caramenggugurkankandungan/https://ilm.iou.edu.gm/members/caramenggugurkankandungan/https://resepdariamih.com/profile/caramenggugurkankandungan/https://layaminstitute.in/profile/caramenggugurkankandungan/https://sksemautom.com/profile/caramenggugurkankandungan/https://pangururankec.samosirkab.go.id/profile/caramenggugurkankandunganhttps://institutocrecer.edu.co/profile/caramenggugurkankandungan/https://blog.idevice.co.id/profile/caramenggugurkankandunganhttps://simpen.jatengprov.go.id/forum/profile/caramenggugurkankandungan/https://pegawai.bankfajar.co.id/author/caramenggugurkankandungan/https://idiomas.ifgoiano.edu.br/blog/index.php?userid=27751https://smpnegeri3sda.sch.id/index.php?pilih=forum&modul=yes&action=view...https://umkmtaka.paserkab.go.id/umkm/213https://moocs.ncut.trisakti.ac.id/blog/index.php?entryid=8808https://stikesmalahayatimedan.ac.id/index.php?pilih=forum&modul=yes&acti...https://academicvitality.com/profile/caramenggugurkankandungan/https://jadipenulismuda.id/profile/caramenggugurkankandungan/https://smpnegeri3ambarawa.sch.id/author/caramenggugurkankandungan/https://akperyagma.ac.id/index.php?pilih=forum&modul=yes&action=viewthre...https://stikesarta.ac.id/index.php?pilih=forum&modul=yes&action=viewthre...https://kelasinformatika.my.id/profile/caramenggugurkankandungan/https://alumni.life.edu/sslpage.aspx?pid=260&dgs884=0&tid884=7036&rid884...https://engage.alaska.edu/uas/page.aspx?pid=534&dgs2366=0https://pnguotdtc.edu.pg/blog/index.php?entryid=14247https://open.essex.ac.uk/blog/index.php?entryid=118139https://freemdsacademy.com/profile/caramenggugurkankandungan/https://meta.times.co.id/profile/caramenggugurkankandunganhttps://bing.untag-banyuwangi.ac.id/author/caramenggugurkankandungan/https://edu.learningsuite.id/profile/caramenggugurkankandungan/https://ipasurabaya.com/profile/caramenggugurkan/https://bkpsdm.samosirkab.go.id/profile/caramenggugurkankandunganhttps://diskominfo.klaten.go.id/profile/caramenggugurkankandunganhttps://prokopim.klaten.go.id/profile/caramenggugurkankandunganhttps://alhuda-rowokele.sch.id/profile/caramenggugurkankandunganhttps://sdnpalmerah25pagi.sch.id/author/caramenggugurkankandungan/https://smpn2surakarta.sch.id/index.php?pilih=forum&modul=yes&action=vie...https://organik.tebingtinggikota.go.id/produk/forum/read/085713334551-ca... 

Submitted by seth65475 on Tue, 07/15/2025 - 05:46

The question of how much cocaine costs brings up broader concerns such as addiction, organized crime, and societal harm. Cocaine’s presence in both affluent and marginalized communities makes this a multifaceted issue with serious consequences. how much is cocaine 

Submitted by seth65475 on Tue, 07/15/2025 - 07:43

SIPTV stands out for its simplicity and efficiency. It doesn’t come with content but gives you the freedom to stream any legal IPTV source. The app is available on a wide range of devices including Samsung, LG Smart TVs, Android TV, and Firestick, giving you control over what you watch and how you watch it. iptv smarters pro 

Submitted by seth65475 on Wed, 07/16/2025 - 00:34

Tech Trends Life isn’t just a blog—it’s a digital experience. I always feel like I’m stepping into a carefully curated space when I visit. From articles on branding and productivity to mindful living, everything is clean, creative, and well-explained. It’s hard to find websites that feel both professional and personal, but this one does. It’s perfect for people who want to understand trends and apply them meaningfully. I’ve found more than a few ideas here that I’ve actually implemented in my work and life. Looking forward to more innovative, balanced content from this amazing site. https://techtrendslife.com/category/lifestyle/

Submitted by seth65475 on Wed, 07/16/2025 - 02:32

The first thing that caught my eye about Belvedere Building & Electrical was their clean and easy-to-navigate website. It was so simple to understand their services and offerings. They specialize in both building construction and electrical services, which is perfect for someone like me who prefers a complete solution. They clearly value safety, modern design, and customer satisfaction. The portfolio of their previous projects looks fantastic—clean finishes, modern looks, and smart planning. I was also happy to see that they work with energy-efficient materials and smart home technology. I’ll be recommending them to friends who are planning upgrades soon. Custom Home Builder Central Coast 

Pages