Electronics, DIY, Makers, Hackers and Internet of Things (IoT)
9 months ago in Blogs
root@libre-computer:/home/libre# dmesg [ 0.000000] Booting Linux on physical CPU 0x0000000000 [0x410fd034] [ 0.000000] Linux version 4.19.56+ (dxue@build-server) (gcc version 7.3.1
1 year ago in Blogs
The principle used for the previous z80/CPM board support was using the WAIT signal, in response to an IORQ request
‘Smart’ tray are not available… Ended by modifying the blank fillers… I have removed the back of the filler (the
I have soldered one board (two in fact, first one was faulty…). There is still one error on the PCB,
The v4 PCB is not tested/soldered yet, but I have added preliminary support for the MBC2 binaries from the SD
New PCB arrived (corrections+added LED), not tried to solder components yet (I don’t have spare parts…)
2 years ago in Blogs
Not finished and not error-free, but yet promising Now the z80, ram and Psoc are on the same board (~
A new iteration of the concept : Romless z80sbc with a PSoC5 module that is doing bootloader/glue logic/serial output &
3 years ago in Blogs
From http://jjmz.free.fr to http://blog.pommerie-michel.fr
Schematic: PSoC4 Design :
On just one breadboard now … I removed the 32-pin flash and replaced it by an SPI-SD card breakout board. So it’s only : Z80, Ram and the Cypress 4200 module, the sdcard. A few resistors,.. It runs the Monitor/Basic...
I have started working on a Z80 board that would use only 3 parts (Z80, RAM, Glue logic+SIO). The Glue is done via a PSoC4 from a Cypress CY8CKIT-049-42xx (<5 euros…) – Currently the Flash chip is not used, and...
5 years ago in Blogs
As almost everybody, I have ordered a few esp8266 modules. For me, the existing examples are not using enough ressources of the chip : it is a 80Mhz device, with lots of memory, so… why not trying to put some...
6 years ago in Blogs
It took me a while to figure out what was wrong with my ProMicro… When trying to program it from Linux/Ubuntu, avrdude was not working, with the following error : avrdude: ser_open(): can't open device "/dev/ttyACM0": Device or resource busy...
No big news regarding the STC15L204 code. I have just updated the schematic, I have simplified cabling the resistors, capacitors and the ds18b20 directly on the stc board and have made some ‘live’ tests with 2 sensors at home (one...
zx81 on stm32 mini v3
Just an update for ChibiOS 2.6.1 of the code I have to run Libmad on the STM32F4 Discovery board. Code
7 years ago in Blogs
Well, the STC15L204 data-sheet is not very clear on some aspects (the device is simple enough to compensate…). I almost totally forgot that this device had a 512 bytes E2PROM… And I also wanted to explore its memory to try...
I have been searching for low cost wireless boards in the past few months to interface with PIR detectors & temperature sensors to create a small wireless network at home, and I have found the following product : on many...
I recently opened a SLM2008 and noticed the unpopulated header with two signal lines : looked like a RS232 header. Browsing the web (Maxim Integrated’s website) , I found a device that could be used for the unpopulated U11 :...
This one is a bit outdated (March 2009), but I have found these photos back. At the time, I had a problem with a Dell KVM that was no more working (no/bad video output, no more control over the KVM...
My STM32F4 Logic analyzer webpage was indirectly linked by hackaday.com on January 27th 2013. Immediately after, hit rate on my page increased by a *10 factor…
or « Will my STM32F4-discovery board replace Arduino/Bus Pirate ? « … Well I needed a logic analyzer to track some bugs in a project I am working on, but that could do more than the Bus Pirate OLS mode… So I...