trabucayre changed the topic of #openFPGALoader to: Universal utility for programming FPGA / Github: https://github.com/trabucayre/openFPGALoader/ Logs: https://libera.irclog.whitequark.org/openFPGALoader
<ysionneau> trabucayre: yesterday I was able to program the fpga for the first time o/
<ysionneau> I didn't change anything special, other than reducing the jtag clk freq
<ysionneau> but it's still quite unstable
<ysionneau> I notice that jtag clk cross-talks to TDI and TDO but the spikes don't seem too big
<ysionneau> I also noticed that I forgot to add decoupling caps on VCCIO8 (the I/O bank of the JTAG pads)
<ysionneau> but to my surprise, it's the same on the OrangeCrab (though, I never used jtag on it ... I always used USB DFU)
<ysionneau> ho, I also notice I didn't put pull-ups on PROGRAMN / INITN pins, it's just connected to the I/O expander ...
<ysionneau> and by default the internal pull-ups of the expander are disabled
<ysionneau> let's try to activate them!
<trabucayre> orangeCrab works well. But yes with missing pull...
<ysionneau> I guess maybe PROGRAMN resets the fpga randomly during the jtag programming
<trabucayre> weird