> On 26 Jun 2017, at 00:06, Michael Brown <[email protected]> wrote: > > > >> On Sunday, 25 June 2017 16:45:55 UTC+2, Bas de Bruijn wrote: >> Hi, >> >> This is a question to the mesa/De0 nano SOC FPGA guru's >> Would it be possible to measure current from a DC motor driven by a mesa >> 7i30 daughter card by means of (example) https://www.pololu.com/product/1185 >> >> I noticed the De0 Nano SoC has an arduino header (which should contain 6 >> analog input pins) >> >> How hard would it be to have the De0 fpga read these pins next to handling >> the 7i30? >> >> Is there a Mesa equivalent for reading analog pins? >> > > Sorry for the incomplete answer: > Yes (I have a prusa-i3 mesa based config up and running on the De0-nano-soc > using the built in ADC converter). > Mostly (I have been unable to figure out how to commit it back into mainline > machinekit). > > Highlights of the process: > > The ADC converter is wired directly into the fpga so the fpga part (in > quartus) was about moving the terasic / university fifo based adc core into > the mesa tom level file and exporting the wires back out through the top, > plus giving the adc a fixed address of 0x0300 for control and 0x0304 for data > readout. > > Somewhere in these commits / branches: > Add adc to quartus project. > https://github.com/the-snowwhite/mksocfpga-hm3_dev/commit/e30bba22c16d1edf9938c916d9a39ea8d567084a > > https://github.com/the-snowwhite/machinekit/commits/hm3soc-adc > > https://github.com/the-snowwhite/machinekit/commits/adc_work2 > > https://github.com/the-snowwhite/Hm2-soc_FDM/commits/current?after=cf2b4b10f4d49d77273aa71971c8fbf8591294d4+34 > > https://github.com/the-snowwhite/mksocfpga-hm3_dev/commits/cap-sense > https://github.com/the-snowwhite/mksocfpga-hm3_dev/commit/425d5decb1882adae717bbc5505c429499212849 > > The adc fifo ip core was conservatively setup to scan all 8 adc chanels when > triggered and then place the data one readout at a time on the read register > when read. > The adc fifo has some more programmable functionality partly discribed in my > initial tests here: > https://github.com/the-snowwhite/mksocfpga-hm3_dev/tree/hm3-adc/SW/MK/kernel-drivers > > > On the machinekit side I then added a driver module that add pins for each > channel to the hm2 module and re-triggers the read for each cycle of the base > clock (1khz). > > Commits here. > > Machinekit De0-Nano-soc adc module > src/hal/drivers/mesa-hostmot2/nano_soc_adc.c > https://github.com/the-snowwhite/machinekit/commit/5c45d22226250c26d85e9b13ffca816b2310d4f8 > > Then I modified the bbb temp user component to scale the temp probe read outs: > > Mesa temp user component > src/hal/user_comps/hal_temp_atlas.py > https://github.com/the-snowwhite/machinekit/commit/6f93a410d7d954a13b6e7294765b182492a399c6 > > Lastly some links to the prusa-i3 config: > > https://github.com/the-snowwhite/Hm2-soc_FDM/commits/current?after=cf2b4b10f4d49d77273aa71971c8fbf8591294d4+34 > > If there is interest and with a helping hand I could attempt to generate some > clean commits to add the adc functionality to master > I have however not been able to understand or get the added soc-mesa fw-id to > work.
As much as I would like, I have absolutely zero knowledge on that. So i can't be of help here. I'll look into the mesa bspi channel and search for a adc converter which supports that. Bas > >> Cheers, >> Bas > > Best wishes Michael -- website: http://www.machinekit.io blog: http://blog.machinekit.io github: https://github.com/machinekit --- You received this message because you are subscribed to the Google Groups "Machinekit" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. Visit this group at https://groups.google.com/group/machinekit. For more options, visit https://groups.google.com/d/optout.
