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USB peripheral driver - debug

2022-06-23 08:26:00 【Be good to me】

Open the debug log:

echo "file drivers/usb/gadget/configfs.c +p" > /sys/kernel/debug/dynamic_debug/control
echo "file drivers/usb/gadget/composite.c +p" > /sys/kernel/debug/dynamic_debug/control
echo "file drivers/usb/gadget/udc/core.c +p" > /sys/kernel/debug/dynamic_debug/control
echo "file drivers/usb/dwc3/gadget.c +p" > /sys/kernel/debug/dynamic_debug/control
echo "file drivers/usb/dwc3/dwc3-msm-core.c +p" > /sys/kernel/debug/dynamic_debug/control

open trace：

echo 1 > /sys/kernel/debug/tracing/events/gadget/enable
echo 1 > /sys/kernel/debug/tracing/events/dwc3/enable
echo 0 > /sys/kernel/debug/tracing/events/dwc3/dwc3_readl/enable	//read  and  write  Will always print , Therefore, it is closed 
echo 0 > /sys/kernel/debug/tracing/events/dwc3/dwc3_writel/enable
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