Search found 129 matches

by Ollie
Sun Mar 26, 2017 6:13 pm
Forum: General discussion
Topic: GPIO interrupts not re-entry safe?
Replies: 4
Views: 67

Re: GPIO interrupts not re-entry safe?

100 ms in ISR - that's strange :o
by Ollie
Sat Mar 25, 2017 7:20 pm
Forum: Off topic
Topic: ESP32
Replies: 5
Views: 253

Re: ESP32 - Widora Air

Sorry, I was too quick to recommend the new Widora Air board. Perhaps the next version after 5.0 is ready for prime time. Today I got my second Widora Air Ver 5.0. The blue LED was blinking when connecting the board to PC. The blinking stopped and the green and yellow LEDs were blinking when uploadi...
by Ollie
Wed Mar 22, 2017 2:21 pm
Forum: General discussion
Topic: Need advise on logic analyser
Replies: 17
Views: 234

Re: Need advise on logic analyser

I used to have Saleae Logic 16. It had very nice functionality, but for some cases the speed was not enough. I did upgrade to Saleae Logic Pro 16 and have not regretted the high price. The combined analysis of high speed analog data with logic data is very useful. The other nice feature is the suppo...
by Ollie
Tue Mar 21, 2017 11:02 pm
Forum: Off topic
Topic: ESP32
Replies: 5
Views: 253

Re: ESP32 - Widora Air

I have 6 different ESP32 development boards, and now I have found my favorite. It has similar appearance than the Teensy 3.5/3.6. It is just shorted and without the SD drive. It is made by http://www.widora.io. Several weeks ago, I did order one from Taobao https://world.taobao.com/item/538209801368...
by Ollie
Sat Mar 11, 2017 3:10 am
Forum: Generic STM32F103
Topic: Hello from Finland
Replies: 6
Views: 130

Re: Hello from Finland

Turbo, I do fully understand your thinking. Some years ago, I was in similar position in learning STM32F4xx. I did end writing a tutorial about the ideas of replacing SPL with your own streamlined code. For that work, the STM manuals did work quite well for me. I do expect that you will get the most...
by Ollie
Tue Mar 07, 2017 3:57 pm
Forum: General discussion
Topic: Using STM32DUINO for commercial code development
Replies: 8
Views: 230

Re: Using STM32DUINO for commercial code development

Ray,

I like your approach and the logic behind that.
by Ollie
Mon Feb 27, 2017 5:50 pm
Forum: General discussion
Topic: Planning to add callback to the SPI DMA functions (dmaSend, dmaTransfer...)
Replies: 59
Views: 742

Re: Planning to add callback to the SPI DMA functions (dmaSend, dmaTransfer...)

Sorry, now I have foot in my mouth. The F1 and other STM MCUs share the same name for the controllers in the peripheral buses. So here is the summary for F4/F7/H7 1) DMA Controllers have multiple streams 2) Streams have multiple channels 3) The stream channels are hard-wired to peripheral devices - ...
by Ollie
Mon Feb 27, 2017 4:41 am
Forum: General discussion
Topic: Planning to add callback to the SPI DMA functions (dmaSend, dmaTransfer...)
Replies: 59
Views: 742

Re: Planning to add callback to the SPI DMA functions (dmaSend, dmaTransfer...)

I agree, that we will have many moons before we will use Arduino IDE for serious or semiserious F4/F7/H7 programming. In that frontier, the developers need to be aware of the capabilities and restrictions of different peripheral buses and the DMA channels in them. I do propose that we are using STM ...
by Ollie
Sun Feb 26, 2017 4:07 pm
Forum: General discussion
Topic: Planning to add callback to the SPI DMA functions (dmaSend, dmaTransfer...)
Replies: 59
Views: 742

Re: Planning to add callback to the SPI DMA functions (dmaSend, dmaTransfer...)

If/when you are preparing to port the F1xx architecture to F4xx/F7xx/H7xx, the DMA allocation management has to be addressed. With multiple alternative DMA streams available for the peripherals and more peripherals requiring DMA, the visibility of this mapping matrix is important. In long run, it wi...
by Ollie
Fri Feb 24, 2017 4:15 pm
Forum: General discussion
Topic: Planning to add callback to the SPI DMA functions (dmaSend, dmaTransfer...)
Replies: 59
Views: 742

Re: Planning to add callback to the SPI DMA functions (dmaSend, dmaTransfer...)

An additional reference can be found at http://www.emblocks.org/wiki/tutorials:f401_f429_disco:spi . I have included the Logic Analyzer screenshots to show how 3 SPI devices are communicating at the same time using DMA for the bulk processing. This is based on the principle that the SPI transfer req...

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