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 KristinaMccoy on Wed, 10/13/2021 - 17:30

Your work here is extraordinary, and the composing is fabulous. The substance praises the composing style. Next time you distribute an article here, could you ensure it has some data about friendly plans? I would be appreciative. Best Social Plan

Submitted by KristinaMccoy on Thu, 10/06/2022 - 16:43

I appreciate the writer for sharing fabulous content here. With the content shared here, I can finish my paper and submit it. This paper has been long overdue and it will finally be complete. vyvanse online

Submitted by KristinaMccoy on Mon, 02/06/2023 - 06:36

I am impressed with the quality of this article. You've shared some top-tier information here, and that's something I've not seen other people do. You have made my day by sharing this! Keep up the fantastic work! TMW Maxwell Price

Submitted by surroundrevolving on Thu, 09/28/2023 - 01:51

Let your mind run wild and on a trip of a lifetime, one that will blow your mind and change your life forever. Immerse yourself in the hypnotic world of gaming, where incredible friendships are formed and infinite knowledge is effortlessly obtained, and prepare to be enchanted. fireboy and watergirl

Submitted by daisymaria on Mon, 11/06/2023 - 22:26

You'll need to write Uno Online or modify software code that runs on the Macchina to communicate with the SPI shield. The specifics of this code will depend on your project's requirements and the type of shield you're using (e.g., Ethernet).

Submitted by umrahapp on Thu, 10/29/2020 - 07:15

Namun, travel umroh tidak perlu mencantumkan tanggal berangkat dan harga paket umroh. Kepastian keberangkatan umroh masih menunggu ...Arab Saudi Kembali Buka Masjidil Haram, Ini Cara Siapkan http://lamahutravel.com/Calon jemaah umroh bisa membuat rencana berdasarkan harga paket yang berlaku untuk menjadi target atau tujuan umroh. Namun, rencana di https://umrahnesia.com/atau “Mbak berapa biaya umrah untuk 5 orang?” Kapan Umrah ... Saat ini sudah banyak metode pembiayaan paket umroh. Salah satunya ...531 Perusahaan Umroh Arab Saudi Bersiap Sambut Jemaah ...Rencana tabungan yang ada di Bareksa Umroh juga tidak mengikat dengan harga paket, jangka waktu juga tidak mengikat karena kita bisa ...Kinerja Tetap Kinclong Saat Pandemi, Begini Simulasi ...Salah satu rencana yang tersedia di Bareksa Umroh, adalah Paket Umroh Barokah dengan estimasi biaya Rp23,5 juta. Dengan asumsi kita ...Umroh Tahap I Sukses Tanpa Kasus Covid-19, Ayo Siapkan ...Rencana tabungan yang ada di Bareksa Umroh juga tidak mengikat dengan harga paket, jangka waktu juga tidak mengikat karena kita bisa ...Jemaah RI Diyakini Bisa Umroh 1 November, RI Tidak ... http://redhoillahiwisata.com/Namun Firman belum tahu berapa persen kenaikan biaya umroh. ... perjalanan umroh terkadang menawarkan paket perjalanan umroh plus ...8 Layanan Wisata Virtual, Tinggal Rebahan Bisa Keliling Dunia https://www.nasrotulummah.com/Ya, saat ini banyak tempat wisata dan travel agent yang mengusung ... menyediakan paket Umroh Virtual tanpa dipungut biaya sepeserpun.Jelang Libur Panjang, PLN Ingatkan Pelanggan Lunasi http://denatourumroh.com/Hal ini untuk menghindari sanksi berupa biaya keterlambatan dan ... utama 3 Paket Umroh, 3 Motor Listrik, dan puluhan hadiah lainnya.Rincian Biaya Umroh Terbaru 2019 dari Perusahaan Travel ... http://umrohalhabsyi.com/Berikut rincian biaya umroh terbaru 2019 dari Daqu travel. 1. Umroh Reguler Riyadoh. Harga Double Rp. 25.750.000. Harga Triple Rp. 24.750. https://www.daftarhajiumroh.com/category/biaya-umroh/ 

Submitted by Dharma on Tue, 01/26/2021 - 00:42

Bagi yang mau dapat informasi seputar <a href="https://tresna.me">Bisnis</a> dan juga <a href="https://www.tresna.me/2019/10/kerja-online.html">kerja online</a> bisa kunjungi blog saya temean teman ada banyak sekali artike menarik yang bisa memberikan inspirasi seperti <a href="https://www.tresna.me/2018/01/jualan-yang-menguntungkan.html">Jualan yang menguntungkan</a> dan <a href="https://www.tresna.me/2018/03/10-jenis-usaha-kuliner-yang-paling-laku.html">Usaha kuliner</a>

Submitted by ZoneZone on Wed, 03/10/2021 - 14:16

Excellent to be visiting your blog again, it has been months for me. Rightly, this article that I've been served for therefore long. I want this article to finish my assignment within the faculty, and it has the same topic together with your article. Thanks for the ton of valuable help, nice share. video defensive driving

Submitted by ZoneZone on Wed, 03/10/2021 - 14:28

That is the excellent mindset, nonetheless is just not help to make every sence whatsoever preaching about that mather. Virtually any method many thanks in addition to i had endeavor to promote your own article in to delicius nevertheless it is apparently a dilemma using your information sites can you please recheck the idea. thanks once more. deck installation austin tx

Submitted by ZoneZone on Wed, 03/10/2021 - 14:39

Outstanding article! I want people to know just how good this information is in your article. Your views are much like my own concerning this subject. I will visit daily your blog because I know. It may be very beneficial for me. acheter des vues youtube

Submitted by ZoneZone on Wed, 03/10/2021 - 14:45

Excellent to be visiting your blog again, it has been months for me. Rightly, this article that I've been served for therefore long. I want this article to finish my assignment within the faculty, and it has the same topic together with your article. Thanks for the ton of valuable help, nice share. leadership coach

Submitted by harrisandreson on Wed, 03/17/2021 - 00:35

Now computer languages are also associated with this technology we call it Artificial intelligence that will change our lives, of course, I will write about it in details but currently, I'm writing something about airport security essay because this topic has not been discussed by many of the online experts and writers, if you want to know how it will work, come and join me.

Submitted by ZooneZoone on Thu, 03/25/2021 - 15:55

I know this is one of the most meaningful information for me. And I'm animated reading your article. But should remark on some general things, the website style is perfect; the articles are great. Thanks for the ton of tangible and attainable help. Escorts in Lahore

Submitted by ZooneZoone on Thu, 03/25/2021 - 16:19

You have done a great job on this article. It’s very readable and highly intelligent. You have even managed to make it understandable and easy to read. You have some real writing talent. Thank you. Lahore escorts

Submitted by ZooneZoone on Sun, 04/11/2021 - 11:44

All the requirements of men are successfully fullled with us with the interactive process of New York Asian escort service oerings. We are here to meet the required intentions of men. We have the ability to dene and satisfy the needs of men. Our all-time goal is to fulll thedesired preferences of men. All the goals for sensual pleasure are perfectly dened here with us. We always render the quality services as per the bookings doneby the client. NYC Escort Outcall Service

Submitted by ZooneZoone on Tue, 04/13/2021 - 16:06

Attractive, post. I just stumbled upon your weblog and wanted to say that I have liked browsing your blog posts. After all, I will surely subscribe to your feed, and I hope you will write again soon! Illuminati members

Submitted by ZooneZoone on Tue, 04/13/2021 - 16:11

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. cargo charter

Submitted by ZooneZoone on Tue, 04/13/2021 - 16:15

Pretty nice post. I just stumbled upon your weblog and wanted to say that I have really enjoyed browsing your blog posts. After all I’ll be subscribing to your feed and I hope you write again soon! Medical marijuana

Submitted by ZooneZoone on Tue, 04/13/2021 - 16:20

Excellent to be visiting your blog again, it has been months for me. Rightly, this article that I've been served for therefore long. I want this article to finish my assignment within the faculty, and it has the same topic together with your article. Thanks for the ton of valuable help, nice share. buy firearms online

Submitted by ZooneZoone on Tue, 04/13/2021 - 16:25

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 work cars for sale by owner

Submitted by ZooneZoone on Tue, 04/13/2021 - 16:40

Wow, cool post. I’d like to write like this too – taking time and real hard work to make a great article… but I put things off too much and never seem to get started. Thanks though. best firearms

Submitted by ZooneZoone on Tue, 04/13/2021 - 16:46

Pretty nice post. I just stumbled upon your weblog and wanted to say that I have really enjoyed browsing your blog posts. After all I’ll be subscribing to your feed and I hope you write again soon! Medical marijuana

Submitted by ZooneZoone on Tue, 04/13/2021 - 17:08

Excellent post. I was always checking this blog, and I’m impressed! Extremely useful info specially the last part, I care for such information a lot. I was exploring this particular info for a long time. Thanks to this blog my exploration has ended. Illuminati members

Pages