Search found 14 matches

by jonr
Sat May 28, 2016 11:30 pm
Forum: Projects
Topic: Additional MCUs as peripherals
Replies: 11
Views: 1463

Re: Additional MCUs as peripherals

I suppose that yes, when I think through when I have run into MCU limits, a faster single processor, RTOS and/or more of everything else (ram/flash/pins/etc) would have solved the problem. And the Raspberry Pi Zero proves (roughly) that such things are available for < $5.
by jonr
Sat May 28, 2016 9:19 pm
Forum: Black Magic Probe & other
Topic: Is SWD-only BMP practical, and on Low-pin-count STM32?
Replies: 23
Views: 2844

Re: Is SWD-only BMP practical, and on Low-pin-count STM32?

I wonder if you could incorporate the flash writing code from open ocd/BMP/Versaloon/?? so that many MCUs would be supported on release.

I find drag and drop convenient, but certainly not a requirement.
by jonr
Sat May 28, 2016 9:02 pm
Forum: Projects
Topic: Additional MCUs as peripherals
Replies: 11
Views: 1463

Re: Additional MCUs as peripherals

As a generic solution, something fast is preferable. Looks like SWD can run at up to 3 MB/sec. SPI is probably similar. DMA would be a plus. An interesting abstraction model would be to emulate a section of shared memory (as you typically have with multiple cores in a single MCU). Ie, both MCUs just...
by jonr
Sat May 28, 2016 8:19 pm
Forum: Black Magic Probe & other
Topic: Is SWD-only BMP practical, and on Low-pin-count STM32?
Replies: 23
Views: 2844

Re: Is SWD-only BMP practical, and on Low-pin-count STM32?

The drag and drop feature in DAPLink requires custom flash writing code for each target processor. So it's far from being a universal adapter that (fully) works with a large number of MCUs.

IMO, DAP42 gets bonus points for being more open.
by jonr
Sat May 28, 2016 3:27 pm
Forum: Projects
Topic: Additional MCUs as peripherals
Replies: 11
Views: 1463

Additional MCUs as peripherals

Small MCU's have gotten so inexpensive, that they are often cheaper than a dedicated peripheral chip that does far less. But other than program loaders, I don't see many multi-MCU small-board computers. Part of the challenge is that such a design requires a communications protocol between processors...
by jonr
Sat May 28, 2016 2:19 pm
Forum: Black Magic Probe & other
Topic: Is SWD-only BMP practical, and on Low-pin-count STM32?
Replies: 23
Views: 2844

Re: Is SWD-only BMP practical, and on Low-pin-count STM32?

I agree - IBDAP is +$20 and I'm not aware of any advantages. DAP42 installed on a ST-LINK V2 clone sounds like a great option for a standards compliant debug adapter that will work with any ARM MCU.
by jonr
Sat May 28, 2016 1:15 am
Forum: Projects
Topic: How to control Devices with Android-Part 1
Replies: 20
Views: 3785

Re: How to control Devices with Android-Part 1

I've been using generic CC2541 modules and reprogramming them with simple serial port transfer code based on Redbear BLE Mini code. Then I use their Android chat app to talk to it. The IAR IDE is free for a month.

If power is not a concern, I'd just use an ESP8266.
by jonr
Fri May 27, 2016 5:57 pm
Forum: Black Magic Probe & other
Topic: Is SWD-only BMP practical, and on Low-pin-count STM32?
Replies: 23
Views: 2844

Re: Is SWD-only BMP practical, and on Low-pin-count STM32?

I would be interesting to compare this to IBDAP.
by jonr
Wed May 25, 2016 11:36 pm
Forum: Maple & Maple mini etc
Topic: Maple mini like Versaloon programmer
Replies: 8
Views: 2534

Re: Maple mini like Versaloon programmer

So is there any low cost, readily available hardware that one can load Versaloon on?

https://github.com/versaloon/versaloon
by jonr
Tue May 17, 2016 6:50 pm
Forum: Cores
Topic: STM32L4 Core
Replies: 139
Views: 11445

Re: STM32L4 Core

Any input as to what changes would be needed to support the STM32L476G-DISCO? At $20, this board has a lot of features and I'm sure that some people prefer Arduino over mbed.