On 7 March 2018 at 10:57, Thắng Lê <lethang12...@gmail.com> wrote:
> can i ask for a way to write a new firmware to get yaskawa absolute encoder. ... > So first of all, i need a way to confirm the data i send is true. i assume > i can use combo 5i25-->7i74--> converter rs-485 to rs-232 ( or usb) --> pc > to debug in terminal. After that i will write a new firmware base on old > firmware I assume that you are talking about using Mesa cards, and writing a new firmware for those. There is existing firmware for some absolute encoders with driver support in LinuxCNC: (SSI, BiSS and Fanuc) http://linuxcnc.org/docs/devel/html/man/man9/hostmot2.9.html#Synchronous Serial Interface (SSI) As well as modifying the firmware you would also have to add the HAL layer support to the Hostmot2 driver: https://github.com/LinuxCNC/linuxcnc/blob/master/src/hal/drivers/mesa-hostmot2/abs_encoder.c (I note that I forgot to update the file comments after I had added the BiSS and Fanuc) The Mesa firmware module for the Fanuc absolute encoders is here: https://github.com/LinuxCNC/hostmot2-firmware/blob/master/src/fanucabs.vhd A Yaskawa module for Hostmot2 and HAL would be a very nice addition to LinuxCNC. There is an alternative option which swaps a software problem for a hardware problem: https://github.com/rene-dev/stmbl/blob/a0a41864f9a40fc7122f1369a4373d9f459a3136/docs/src/Getting%20Started.adoc The STMBL servo drive connects to LinuxCNC via a Mesa card using smart serial (so could be used in place of your RS-485 to RS232 converter in the hardware you outlined above) You could either use it just as a Yaskawa to Smart-Serial converter or utilise it as the servo drive for your system. The STMBL firmware is written in C rather than VHDL so is probably not directly usable in a Mesa firmware module. I have lots of unpopulated circuit boards, but assembled drives or populated boards are rather rarer. (I had a batch of 50 made, but they are all allocated to recipients). If you are needing a lot of boards then I can put you in touch with a company in China who have all the files and can make populated boards (less power semiconductor) for £50 a board in batches of 50. -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed for the especial use of mechanical geniuses, daredevils and lunatics." — George Fitch, Atlanta Constitution Newspaper, 1916 ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
