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I just spent of most of the day pulling my hair out wondering why my SPI data was bad coming from my MCU.
Screen wasn't displaying.
So I plug in my Saleae 8 pro (they are flawless right?) and get all kinds of craziness. It was SPI-ish the same way Kraft Singles are Cheese-ish - you knew what it was trying to be, but no. Just, no.
Turned my sample rate from 500MS/s to 100MS/s on my analyzer and presto - in comes the SPI stream, and I know the codes to write a bitmap to a region of the display by heart. Sure enough it was coming through.
The whole time things weren't working because I just needed to invert my reset and dc lines and pull them high. It's hard to figure out the orientation of the pins with respect to their function given zOS allows you to invert them so I wasn't sure.
But the SPI data coming in bad, that red herring took me for a day of time i'll never get back.
Support issue opened with Saleae now.
Check out my IoT graphics library here:
https://honeythecodewitch.com/gfx
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I haven't dealt with them lately but they are fantastic and very willing to help.
I bought one when they were pretty new and I've used it for many years, it's a life saver!
Give me coffee to change the things I can and wine for those I can not!
PartsBin an Electronics Part Organizer - Release Version 1.1.0 JaxCoder.com
Latest Article: Simon Says, A Child's Game
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Their support is fantastic, and this is the first time I've had a problem with one that wasn't down to a skill issue (so far)
Although in my defense, who the hell would think you can't plug your analyzer into a USB3 hub?
You can't. It won't see it. It's a known issue. That was my skill issue though - not knowing. They were really nice about it of course, and you never have to wait to talk to someone.
Hell I was about to open a ticket, and a live person started chatting me up before i could finish.
Check out my IoT graphics library here:
https://honeythecodewitch.com/gfx
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I looked over my old emails and found that I bought the " Logic 8-channel USB Logic Analyzer" back in Jan. 2012.
I built a new computer earlier this year and it didn't recognize the device so I put in a ticket in Mar. of this year. A live person responded to the ticket and the problem was resolved in a short time.
Yeah like I told the Saleae person, "It's the most important tool I own".
Give me coffee to change the things I can and wine for those I can not!
PartsBin an Electronics Part Organizer - Release Version 1.1.0 JaxCoder.com
Latest Article: Simon Says, A Child's Game
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I am confused about cause and effect.
1. invert reset and dc lines and pull them high
2. changed sample rate from 500MS/s to 100MS/s fixes problem
Saleae 8 Pro according to web searches is primo logic analyzer
"A little time, a little trouble, your better day"
Badfinger
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Oh no, sorry. It was two separate issues I initially thought were related.
1. Fixed the display so that it worked
2. Fixed my logic analyzer so that it worked.
After doing both, it all worked.
And yeah, this analyzer is supposed to one of the best you can buy. That's why I was shocked at its behavior.
Check out my IoT graphics library here:
https://honeythecodewitch.com/gfx
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Understand. Got it. Hardware can be a bear sometimes.
Mostly a hobby which I gave up because of space and time.
"A little time, a little trouble, your better day"
Badfinger
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jmaida wrote: Hardware can be a bear b1tch sometimes.
FTFY
M.D.V. 
If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about?
Help me to understand what I'm saying, and I'll explain it better to you
Rating helpful answers is nice, but saying thanks can be even nicer.
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honey the codewitch wrote: the same way Kraft Singles are Cheese-ish - you knew what it was trying to be, but no. Just, no.
eloquent !
![Rose | [Rose]](https://www.codeproject.com/script/Forums/Images/rose.gif)
«The mind is not a vessel to be filled but a fire to be kindled» Plutarch
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#Worldle #546 1/6 (100%)
🟩🟩🟩🟩🟩🎉
https://worldle.teuteuf.fr
"A little time, a little trouble, your better day"
Badfinger
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I placed a single Amazon order with 4 different items. At check-out I checked the box indicating that they can delay an item if needed to reduce boxes / shipments. Nevertheless, they proceeded to create 4 different shipments - OK, probably coming from 4 different warehouses. Now I get to watch status updates as the Amazon and USPS wheels spin gears grind.
Shipment 1 - Started at a warehouse about 100 miles away. By Wednesday it arrived at a hub about 30 miles away with an estimated delivery of Thursday (a day early). Then I got a "Delayed in transit" status and no Thursday delivery. It's now at a hub 150 miles away with a "An address redirection agreement is in place between the customer and the carrier. Package will be forwarded to the requested address." status.
Shipment 2 - Started at a warehouse 1500 miles away and arrived at my local post office this morning where it met up with shipment #3 (see below).
Shipment 3 - Started at a warehouse about 30 miles away and arrived at my local post office this morning where it met up with shipment #2. Both items are now at a hub or post office (its unclear) about 90 miles away.
Shipment 4 - I just got notice of the label being printed. Bezos only knows where this one will travel.
I usually have pretty good luck with Amazon deliveries but this one has gone completely sideways. Its a good thing none of these deliveries are time sensitive.
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I just use the free next-day delivery, and it's usually here about 13:30 ~ 14:30 the following day.
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
AntiTwitter: @DalekDave is now a follower!
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Oh, this is obviously Amazon's Game Day Challenge Bonanza!!, where you and special someone could win a trip to.....Hawaii!
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This isn't a criticism, just an observation: There are no "real"" articles on getting going with embedded here at codeproject.
For example, I just searched for Devicetree - a declarative format for configuring hardware for an operating system like Linux and ZephyrOS. I found one result - an interesting little linux driver that implements a loop back of some sort.
Nothing really on using ST's HAL, or NXP's offerings, or even the VS Code extensions by Nordic Semiconductor.
On one hand, that's fertile article territory.
On the other, codeproject is in good company in this respect.
If you intend to practice the black arts of commercial embedded, you will eventually need to know these things, only to find out that
A) After sitting through 30 minutes of a how to video you notice it won't support your hardware
B) Google laughs at your search queries. Laughs in your face. Try googling how to do SPI with CMSIS. You'll find two useful article with code and concepts, both for a particular semiconductor vendor you don't use. I've already looked.
C) Try using Cube. Just try. If the screen doesn't stop repainting for you 5-10 minutes in, you're a luckier person than me. And even if you get past that, you still have to learn how to use it
D) Everything else is courses and academies.
Regarding D: I really don't do well with that format. I test well, but only if I can figure out how to learn something on my own before the test is due. That worked in high school. It won't work here. I need better options.
I'm on a discord about this. And I've been in my element banging away at ZephyrOS. I may just have some codeproject articles on this eventually.
Of course that's what I said about getting an OSless setup running on an ARM Cortex A before I gave that up.
Check out my IoT graphics library here:
https://honeythecodewitch.com/gfx
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Completely agree. In the middle of looking at a number of technical issues - all related to Microsoft. I'm sure they answered the question somewhere, but there are so many answers and so much clutter it's useless - that's on Microsoft's site. Going through google, it gets even worse. A full page of responses that are all paid advertisements but no information.
The embedded world is somewhat of a microcosm. I have found most of my information from the tool vendor forums and occasionally reddit.
Charlie Gilley
“They who can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety.” BF, 1759
Has never been more appropriate.
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Have you asked ChatGPT? 
I just asked it "how to implement SPI with CMSIS"
and it gave a lengthy answer including some stub code examples in C/C++, but here:
Quote: Initialize CMSIS:
Include the CMSIS header file for your specific microcontroller in your project. For example, for ARM Cortex-M microcontrollers, you can include "core_cmX.h," where "X" represents the Cortex-M version.
Configure SPI Registers using CMSIS:
Access the SPI registers using CMSIS structures and configure them accordingly.
Is where I suspect it could be less vague. 
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Like Microsoft documentation - technically correct, but practically useless.
Check out my IoT graphics library here:
https://honeythecodewitch.com/gfx
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History has taught me not to go beyond the crayons.
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We're relying on you to lead the way, to give us some direction! You are the CodeWitch - All Hail The CodeWitch!
Someone has to go first, young lady, and you have a healthy head start on the rest. Lead the way, start filling that void, and claim the fame you deserve.
Will Rogers never met me.
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I am busy zephyrizing a bunch of my IoT ecosystem in order to have some fundamentals to work with
Check out my IoT graphics library here:
https://honeythecodewitch.com/gfx
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I'd be curious after all the optimization, how portable the code is from project to project. My experience has been that unless you are solving a very specific/generic problem, code reuse doesn't happen. The concepts are transferred but not the code itself.
Charlie Gilley
“They who can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety.” BF, 1759
Has never been more appropriate.
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I just got it working.
uix on zephyr os - YouTube[^]
That uses much of my ecosystem. Not the drivers. I can't really write zephyr drivers as part of my ecosystem because of the way it initializes globals in C++ - it does so after the drivers are initialized, so you cannot use C++ to write the drivers.
On the other hand, I've been looking and most of the ones I've written are either already written, or a variant is written that can be easily modified.
Check out my IoT graphics library here:
https://honeythecodewitch.com/gfx
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so, lead the charge ?
isn't there a yuge bunch of makers, bloggers, etc., around Arduino, etc. ? lots of competition in the industry, and many manufacturers targeting hobbyists, researchers ?[^]
Your frustration comes as you struggle to make your graphic/imaging facility (high quality font and image rendering ?) work with newer, less known, boards ... with smaller image/font displays ?
Please leave more clued on the path to the rabbit hole 
cheers, bill
«The mind is not a vessel to be filled but a fire to be kindled» Plutarch
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You can't really make proper embedded devices with Arduino.
Embedded involves like ZephyrOS, embedded linux, or FreeRTOS. It involves pulling your hair out because you spent the day trying to get SPI working only you didn't read paragraph 3, page 1059 of the hardware reference manual's errata which tells you that SPI won't work at the clock speed you're running at due to a hardware bug.
That's embedded. 
Check out my IoT graphics library here:
https://honeythecodewitch.com/gfx
modified 23-Jul-23 2:03am.
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got it, thanks: imho, your definition of "embedded" is critical to your work, and, i don't get ... that 
advice ?: if i wanted to find a low cost limited functioning robot kit i could cover with my own design cover, that i'd then send commands to by bluetooth ... imagine a small robot dog ...
where would you look ?
thanks, bill
«The mind is not a vessel to be filled but a fire to be kindled» Plutarch
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