On Friday 22 January 2021 12:24:14 Ralph Stirling wrote: > I finally succeeded in getting the STMBL code on a STM32F407 > Discovery eval board talking to a Mesa 7I90 via sserial. The > final issue was assuming the wrong pin for sserial tx on the F407. > > Here is my final summary of everything necessary to replicate > what I did, for anybody else trying this. > > Steps on F407 end: > 1. Compile STMBL code following their docs. > 2. Plug in F407 Discovery st-link usb cable. > 3. Copy obj_boot/blboot.bin to the F407 st-link drive > 4. Plug in F407 Discovery otg usb cable (micro-b) > 5. Run "make all_btburn", which should give flashing progress > 6. Connect F407 ground to 7I90 ground > 7. Connect F407 PA0 pin to sserial rx pin on 7I90 > 8. Connect F407 PA10 pin to sserial tx pin on 7I90 > 9. Run STMBL servoterm and connect > 10. Edit config to have these lines: > load sserial > sserial0.rt_prio = 2.0 > sserial0.frt_prio = 2.0 > 11. Save config and type "reset" > 12. On linuxcnc computer, run "halcmd -I" > 13. Type: > loadrt hostmot2 > loadrt hm2_xxxxx config=" sserial_port_0=0XXXXXXX" > > I believe this will work with a variety of STM32F4xx chips and > boards. It looks like the stock stmbl code is about 303K in size, > so a 512K flash cpu is probably the minimum. The stats given > by servoterm seem to indicate that cpu usage is low, though, > so a slower clock may be OK. I wonder if it would run on the > new RPi Pico with modest modifications?
What comparison can be made between the very limited, fixed scale A-D conversion of a mesa card's 1st 4 inputs on say a 7i76, and the A/D speed and scaling that $4 pico-pi might be able to do when running the STMBL code, and how fast could it do it? Having those figures at hand would determine just how usefull the pico-pi might be. > Thanks for the help and suggestions from Andy and Peter. > -- Ralph > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
