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RE: Using WebUSB to facilitate Functional Circuit Test (FCT) Data Capture

kmikemoo — Thu, 25 Jun 2026 23:42:08 GMT

Great post! Awesome application!

RE: Using WebUSB to facilitate Functional Circuit Test (FCT) Data Capture

DAB — Thu, 25 Jun 2026 20:03:59 GMT

Very good post.

RE: Using WebUSB to facilitate Functional Circuit Test (FCT) Data Capture

shabaz — Wed, 24 Jun 2026 16:26:39 GMT

Nice work! Also, bonus, WebUSB is supported on Android Chrome, hence it's a simple way to attach Pi Pico to a mobile, and the HTML/JavaScript will run just fine.

RE: MSPM0 analogue front-end: general purpose amp as buffer for ADC

DAB — Tue, 23 Jun 2026 19:39:32 GMT

Nice post Jan.

I did not know that this device included opamps withing the architecture.

It looks like TI is copying capability from the PSOC.

RE: How to Work with MSPM0 Microcontrollers... and Build a Peripheral Expander / Processor Companion!

kk99 — Sun, 14 Jun 2026 13:45:56 GMT

Nice video/write-up.

RE: How to Work with MSPM0 Microcontrollers... and Build a Peripheral Expander / Processor Companion!

Jan Cumps — Sun, 14 Jun 2026 07:29:18 GMT

TI published an application note that allows flex on the interface side: IO Expander With SPI, I2C, and UART.

The example in your post focuses on one interface, and several expansion options (GPIO, ADC, PWM, UART).

The application note sticks to one expansion type: GPIO. But it shows how to use different communication techniques to do that: I2C, SPI and UART.

RE: How to Work with MSPM0 Microcontrollers... and Build a Peripheral Expander / Processor Companion!

DAB — Sat, 13 Jun 2026 20:35:08 GMT

Very good video.

RE: How to Work with MSPM0 Microcontrollers... and Build a Peripheral Expander / Processor Companion!

genebren — Sat, 13 Jun 2026 16:01:41 GMT

This is a very useful approach and another great write-up! I have utilized very similar techniques to replace analog/digital circuitry with tiny microprocessors, or like you used here, master/slave processors to overcome pin/peripheral shortages or to isolate time critical functions into a slave processor.

I have been thinking about updating some of my products to replace some of my TTL parts with tiny microprocessors to help reduce my part count in inventories. Not sure how big of an effect this will have, but it might help as some of these parts hit end of life.

RE: How to Work with MSPM0 Microcontrollers... and Build a Peripheral Expander / Processor Companion!

shabaz — Sat, 13 Jun 2026 14:06:04 GMT

Just thought of another feature I really want to add: AC measurement on an ADC channel. Would save on external circuitry, or for the main processor from having to rapidly sample, i.e. just let the peripheral perform that measurement and retrieve the result via I2C. There is a TI example (PDF) of full AC power measurement, so I can probably examine that for ideas.

RE: How to Work with MSPM0 Microcontrollers... and Build a Peripheral Expander / Processor Companion!

embeddedguy — Fri, 12 Jun 2026 04:46:19 GMT

Oh, so you ran out of UART interface. That is weird, but there is software serial as well. Also, not sure but some low-end FPGA chip can also emulate some peripherals such as I2C, etc.

RE: Cheap debugger ($6) for EasyL1105 MSPM0 board

Jan Cumps — Mon, 08 Jun 2026 20:10:20 GMT

You can also do the opposite of what's described in this post: program the LaunchPad with an external debugger.

Several of the MSPM0 LaunchPads have 2 ARM 10-pin JTAG connectors. One so that you can use the LaunchPad to program other devices.
The other one allows to connect an external debugger. In the photo below, I use a TI XDS110 debug probe.

In both uses cases, you have to remove the debug bridge jumpers in the middle of the board, to break the connection between the on-board debugger and the MSPM0.

RE: Using SWD with ARM Microcontrollers: An Introduction to Firmware Programming and Debugging!

genebren — Fri, 05 Jun 2026 16:37:59 GMT

Great post! There is a lot of great information and effort in this post! Thanks for sharing.

RE: Using SWD with ARM Microcontrollers: An Introduction to Firmware Programming and Debugging!

DAB — Thu, 04 Jun 2026 20:03:20 GMT

Very nice post.

RE: DexoPad — phone-as-keyboard-and-mouse for any USB host (ESP32-S3 + BLE, on Kickstarter)

Mengjie — Fri, 29 May 2026 03:19:28 GMT

Hi shabaz — thanks for thinking through this with us.

Your model would work, no argument. Our situation: the software's built end-to-end for closed-source commercial use. Opening it up isn't a config flag — it touches architecture, licensing, and how we'd structure support. Not something we can rewire mid-campaign.

That said, this is worth an actual internal look. I'll take it back to the team.

Best,
Mengjie Zhang
Founder, PalmBlock

RE: DexoPad — phone-as-keyboard-and-mouse for any USB host (ESP32-S3 + BLE, on Kickstarter)

shabaz — Thu, 28 May 2026 17:43:33 GMT

If it were me, I would have done this differently. Why not just share the code for free to convert (say) a Pi Pico W to do this function. Then, just charge a small amount in an app store, for anyone to purchase the software required on the phone, or, if you're doing it all in the browser, just make a small donation possible.

I think $35 (and then shipping, possible taxes) is not attractive, because one is just as likely going to lose the dexopad dongle, as they are likely to lose their wireless USB keyboard/mouse dongle. Whereas, if one lost a Pi Pico W, it's cheap to get another from anywhere in the world almost, at little cost. You'd probably make more from the donations than from the KickStarter, and you'd retain more since you'd not be paying KickStarter a percentage any longer. Personally, I'd pay $10 just for a web app, if it would save me time and effort writing my own.