Four stepgens and one pwmgen are invoked in a LinuxCNC 2.5.2 environment as follows, resulting in step rate limitation on all four joints:
loadrt hm2_pci config="firmware=hm2/5i23/SVST4_8.BIT num_encoders=0 num_pwmgens=1 num_3pwmgens=0 num_stepgens=4" Under this configuration, maximum step rate is limited to approximately 250Hz, while without 5i23 pwmgen invocation the 4 stepgens perform as expected (with good step rate headroom). Having confirmed that this limitation is independent of host motherboard but identical on two Mesa 5i23 adapters tested, and independent of pwmgen frequency between 400Hz and 20kHz, it is expected that this is a firmware rather than performance constraint of the FPGA on the 5i23 adapter. The ini file is unchanged between configs with or without 5i23 pwmgen. What steps are needed to overcome this constraint? ------------------------------------------------------------------------------ November Webinars for C, C++, Fortran Developers Accelerate application performance with scalable programming models. Explore techniques for threading, error checking, porting, and tuning. Get the most from the latest Intel processors and coprocessors. See abstracts and register http://pubads.g.doubleclick.net/gampad/clk?id=60136231&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
