A breakout board with STM32F042F6. This can also handle STM32F030F4. Very small, cute and breadboard friendly. This little MCU is Corex M0 32 bit, 48Mhz, 32Kb Flash, 6Kb SRAM and contain a long list of IO including touch contacts. The board include x-tal (not mounted here) and a 3.3V PSU that also can act as…
Category: Embedded Development
HAL – Software Wiring
Hardware Abstraction Layer is a thin layer of software that “abstract” your code away from the actual electronics. Actually one of the better implementations around is the Arduino library, so it is many good reasons to copy this as much as possible. But, not all of it as Arduino was implemented on a 8 bit…
STM32F405RG Breakout
Finally updated Revision 1.2 of the Rx breakout board. Minor correction ca 0.5 mm on width. Correct GND/3.3V tag swap. Added a User Led Added a jumper for the user led. This is connected on the PCB, but you can disconnect the Led and add a jumper if you want the led on a different pin.…
Java
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Sorting source code
I admit it sounds a bit ludicrous, but right now I miss an source code aware sort function in my IDE. If you start maintaining large files with loads of structures or functions you often end up paging up/down looking for them – to reduce this time I start sorting them in alphabetic order. enum…
CH340G Working
Nice to see CH340G finally registering correct on Windows. The circuit below works just fine. The first you always should do is to measure if you have power – in this case 3.3V – I actually did, but as I finally measured on the pins I noticed that I actually did not. Looking at my…
PLC – Ethernet/RS-X
The last I need is yet another board without code, but I like to draft some PLC boards. This is a com adapter connecting the backbone to Ethernet and external RS-X lines. The code will be a variant of what I will make for the com adapter.
PLC Backbone Bus
Just updated the pin numbers on the PLC Backbone Bus. The idea here is that we have 4x RS-X lines (2 optional) and 5V,12V,24V,48V supplied from A and B source. The boards select what power they need. I need to connect to a PSU & battery before I am sure that this is what I…
PLC Backbone 3D
This is just an early 3D model of the minimum backbone bus just to illustrate and work on practical issues. I am going for the more minimal bus for now. The size of the bus do not decide the size of the boards, but I do like this small size. I will however adjust the actual…
PLC Backbone 2
The previous proposal included a lot of data/address/function pins that actually is a bit obsolete design as we use multiple RS-X channels. This smaller bus uses 2×20. I can use the same width as for a Hat, but maybe a bit deeper boards. I need the PLC system to be small and mobile to fit…