Hi
chased my tail today, no results.
I tried a 1amp LM3940 regulator today, no good/worse maybe a 3amp would be better.
>> PIO at 1560 MHz. I've cut the clocks... it helps a lot.
this is getting really interesting, so only clk_sys and PIO?? PIO must be permanently wired to clk_sys,
>> Did it mostly from debugger, cores get in hardfault lock state (coma),
debugger have any interesting extra instructions that may be of use?? eg. breakpoints.or does it use WFI/WFE. I wonder, put cpu into WFI and use DMA from a PIO FIFO to increase clk_sys, repeat to decrease clk_sys and see if cpu wakes up.
WISH LIST. for the PicoDebugger to have an option for UART coonnection for seperate power suuplies.
>> Gradually increasing the PLL frequency (in debugger), and observing the glitches.
what does a glitch look like?? are you using onboard SMPS, I'm going to take a leaf out of your book and get the debugger operational, 750Mhz is my limit, RISCV (I did get 798Mhz but not consistant) is a pain in the ass for me.
thanks Brian
chased my tail today, no results.
I tried a 1amp LM3940 regulator today, no good/worse maybe a 3amp would be better.
>> PIO at 1560 MHz. I've cut the clocks... it helps a lot.
this is getting really interesting, so only clk_sys and PIO?? PIO must be permanently wired to clk_sys,
>> Did it mostly from debugger, cores get in hardfault lock state (coma),
debugger have any interesting extra instructions that may be of use?? eg. breakpoints.or does it use WFI/WFE. I wonder, put cpu into WFI and use DMA from a PIO FIFO to increase clk_sys, repeat to decrease clk_sys and see if cpu wakes up.
WISH LIST. for the PicoDebugger to have an option for UART coonnection for seperate power suuplies.
>> Gradually increasing the PLL frequency (in debugger), and observing the glitches.
what does a glitch look like?? are you using onboard SMPS, I'm going to take a leaf out of your book and get the debugger operational, 750Mhz is my limit, RISCV (I did get 798Mhz but not consistant) is a pain in the ass for me.
thanks Brian
Statistics: Posted by brianWS — Sun Jul 06, 2025 10:21 am