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USB stdio issue at lower sys clock

Open szlldm opened this issue 9 months ago • 4 comments

USB stdio fails if SYS_CLK_KHZ overridden to 32MHz (PLL_SYS_VCO_FREQ_KHZ and PLL_SYS_POSTDIV1, 2 are also set to valid values). /dev/ttyACM0 does not even appear dmesg shows errors: usb 1-7.2: new full-speed USB device number 71 using xhci_hcd usb 1-7.2: Device not responding to setup address. usb 1-7.2: device descriptor read/all, error -110 Meanwhile user code on the Pico runs ok. At 64MHz everything seems fine (only SYS_CLK_KHZ and PLL_SYS_POSTDIV2 changed). Is this expected, or is anything i can do to make it work? Thx

szlldm avatar May 05 '24 02:05 szlldm