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Using STM32 board with Arduino IDE

G4NQX
 

One for Jack W8TEE really ut it may interest others, this webpage details some boards and using them with the Arduino IDE.

Very interesting.


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Rob G4NQX
Jack Purdum
 

Interesting and I don't know much about these. I do like the Teensy 3.5 and 3.6 because the have at least 512Kb of flash and 192K of SRAM and are clocked at 120MHz or higher. So far, however, I haven't needed that much horsepower.

Jack, W8TEE


From: G4NQX <tasmod@...>
To: [email protected]
Sent: Saturday, February 4, 2017 7:39 AM
Subject: [BITX20] Using STM32 board with Arduino IDE

One for Jack W8TEE really ut it may interest others, this webpage details some boards and using them with the Arduino IDE.
Very interesting.

--
Rob G4NQX
 

I have been playing with a couple of different 32 bit alternatives to the 8 bit Arduino Nano that I had been using in most of my projects. I had tried several of the Teensy models both the LC and the version 3.2. They worked well but are more expensive than the $3 Nano. I just received a couple very inexpensive stm-32 boards I ordered on eBay.
Search for STM32F103C8T6-ARM-STM32-Minimum-System-Development-Board-Module-For-Arduino and you will find multiple sellers, with prices starting at under $3. You will have to use either a USB-serial converter like with a Pro-Mini or a STlink programmer ( under $5 ). There is also the option of using either method to burn a bootloader directly to the board, and then program through the micro USB port on the board. I replced the Teensy in the breadboard I had setup for the controller/display for my latest project. The results are very favorable, it looks like this will be the replacement for the Nano in future projects. I updated my blog page with a picture of the breadboard with the stm-32 in use.

DuWayne KV4QB


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DuWayne? KV4QB
G4NQX
 

DuWayne,

Does the graphics library speed up the graphics by a significant amount? ?? It certainly looks interesting.

I followed your journey with the SNAjr with interest.? I was doing something similar but eventually made up the Simple Scalar Network Analyser as it met my needs.
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Rob G4NQX
Jack Purdum
 

I think DuWayne will agree that there's only so much you can do in a library to speed things up. Some libraries use floating point math and, without a math coprocessor to help things along, it is going to be slower than a library that uses integer math, ceteris paribus. A library can be written in assembler and someone who is good at assembler code can make a difference, too. However, I think the biggest single factor the uC's clock speed. I saw a graphics program with a given library run on a Nano then the same program run on a Teensy 3.6. I would say there was a 10x advantage to the Teensy. I can't be sure, but I think the library used fp math, so the test really isn't fair in that the Teensy does have hardware fp on it. That said, the Teensy sells for $29 while the Nano is less than $3. I have a Teensy 3.5 and 3.6, but haven't needed the horsepower yet. I can say that I've used the Arduino IDE to successfully compile programs for both Teensys.

Jack, W8TEE


From: G4NQX <tasmod@...>
To: [email protected]
Sent: Saturday, February 4, 2017 4:30 PM
Subject: Re: [BITX20] Using STM32 board with Arduino IDE

DuWayne,
Does the graphics library speed up the graphics by a significant amount? ?? It certainly looks interesting.
I followed your journey with the SNAjr with interest.? I was doing something similar but eventually made up the Simple Scalar Network Analyser as it met my needs.
--
Rob G4NQX
 

The stm-2 board with the modified Adafruit drivers are much faster. Here is a Youtube video showing the difference.

After I get a couple of projects finished, I will probably redo the SNA Jr to use this larger display and a stm 32 board.
DuWayne KV4QB


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DuWayne? KV4QB

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