Dear Jakob, Firstly, sorry about the delay in response.
> Oh, this is really nice, thank you! These boards, do they have > some kind of digital or analog I/O for easy interfacing? Sure. They do. The Mizar32 has 6 buses (female berg connectors). One can configure GPIO pins as input or output. To see the list of available pins, please have a look at the GPIO  page in the Hempl doc. Here's an example on how you can configure a GPIO as an input. # A simple program which demonstrates # the usage of user-buttons. # declare pins (setq led 'PB_29 button 'PX_16) # a simple delay function (de delay (t) (tmr-delay 0 t) ) # make sure the LED starts in # the "off" position and enable # input/output pins (de init-pins () (pio-pin-sethigh led) (pio-pin-setdir *pio-output* led) (pio-pin-setdir *pio-input* button) ) # And now, the main loop (de prog-loop () (init-pins) (loop (if (= 0 (pio-pin-getval button)) (pio-pin-setlow led) (delay 100000) (pio-pin-sethigh led) (delay 100000) ) ) ) (prog-loop) One can directly attach sensors (or other components) to these connectors. The other way is to solder your components to a thru-hole proto PCB (which has the same dimensions as the Mizar32 CPU board) and use the new PCB as a Mizar32 shield. The proto PCB can also be ordered on 4star. I think there's also an SMD proto board. References: : https://en.wikibooks.org/wiki/Hempl/GPIO On 4 November 2015 at 15:43, jakob <ja...@aurorasystems.eu> wrote: > Oh, this is really nice, thank you! > > These boards, do they have some kind of digital or analog I/O for easy > interfacing? > > > > > On 04/11/15 03:03, Raman Gopalan wrote: > > > Dear PicoLisp community, > > Greetings! I trust you're all doing well! Thank you for all the > interesting discussions in the mailing list. I have something to share > with you all. > > I'd like to announce `Hempl' , a software system for programming > (32-bit) machines like (hacker friendly, free as in freedom) Mizar32 >  in miniPicoLisp. SimpleMachines  produced Mizar32 > specifically for virtual machines like PicoLisp and Lua. > > Here are the Mizar32 specifications: 66MHz AVR32 CPU, 32MB SDRAM, > I2C, SPI, PWM, ADC, SD card interface, USB with UART, Ethernet (no > Lisp module yet), character LCD and VGA add-on modules. > > There are quite a few (I guess a few hundred) Mizar32 boards in the > lab in Sicily waiting to be sold. Every single board can practically > work as a tiny PicoLisp machine (runs Hempl) and can connect to a VGA > interface and a PS/2 keyboard (if that's the configuration you'd like > to use it in). > > It can also be used over the USB using an FTDI chip interface  or > using a (terribly slow) USB CDC stack running on the chip. (One can > also make it work over Telnet). It comes with support for most HW > peripherals. Here's how a simple PWM looks like on Mizar32: > > # Make the LED slowly fade up and down forever > # > # Connect a LED in series with a > # 330 ohm resistor between PWM0 pin > # (BUS4 pin 7) and GND (BUS4 pin 1) > > (setq > pwmid 0 # Which channel to use? > speed 3000 # PWM frequency in Hz > fadetime 1 # How many secs to fade up? > nsteps 100 ) # How many steps in the fade? > > (setq delay (/ (* (pwm-getclock tmrid) fadetime) > nsteps ) ) > > (pwm-start pwmid) > > (loop > # Fade the LED up > (for duty nsteps > (pwm-setup pwmid speed duty) > (tmr-delay *tmr-sys-timer* delay) ) > > # Fade the LED down > (for (i nsteps (ge0 i) (dec i)) > (pwm-setup pwmid speed i) > (tmr-delay *tmr-sys-timer* delay) ) ) > > Here are the key features of Hempl: > 1) Full control of the hardware platform (MCU) with miniPicoLisp (*) > 2) Shell environment for user interaction > 3) FAT file system (for the SD/MMC card interface) > 4) XMODEM protocol for convenient sharing of files with PC > 5) A tiny (monolithic) vi clone for editing PicoLisp code on-the-fly > > The Mizar32 comes with documentation  and also provides examples > on how to use the HW peripherals in PicoLisp. Here's an article  on > "Reviving Lisp for smaller programmable machines". A lot of Hempl's SW > architecture is discussed there. Thanks again Alex for putting it up! > > SimpleMachines can use some of the money from the sales of these > boards for its upcoming HW project - the Avior32. It is another MCU > development board around an ARM Cortex clone from ST. For every > Mizar32 board sold with our beloved PicoLisp, SimpleMachines will > donate a part of the sales money to PicoLisp. > > If you feel like giving us a hand, you can write an email to Sergio > Sorrenti (in CC) or order it on 4star . You can then compile the > Hempl sources and type away on the Mizar32 in PicoLisp. This chapter >  shows how one can compile Hempl and install the firmware on the > MCU. > > Please give us your suggestions. Good day! > > R > > References: > : https://github.com/simplemachines-italy/hempl > : https://en.wikibooks.org/wiki/Hempl > : http://www.simplemachines.it > : https://www.adafruit.com/products/284 > : https://en.wikibooks.org/wiki/Hempl > <https://enwikibooks.org/wiki/Hempl> > : http://picolisp.com/wiki/!download?-A300 > : http://4star.it > : https://en.wikibooks.org/wiki/Hempl/Compiling_Hempl > > >