None of the USB drivers currently support entering deep sleep mode
while USB is active. To protect USB from malfunctioning lock deep
sleep in USBPhyHw::init.
I implemented USB Device feature for Renesas mbed boards.
The code referenced the following code as a starting point and is implemented it by inheritting USBPhy same as other boards.
(mbed-os\features\unsupported\USBDevice\targets\TARGET_RENESAS)
Ignore interrupts on disabled USB endpoints. This prevents handling
interrupts when in the wrong state.
Prior to this patch when running the serial test on a K64F the assert
on line 908 of USBDevice.cpp would sometimes be triggered. This
assert indicates that an endpoint 0 IN interrupt occurred before
the device was ready.
This occurs during the test_cdc_usb_reconnect test when the host sends
a "Set Control Line State" USB request and the device acknowledges it
just before USB is disconnected.
If an IN endpoint is stalled during a transfer then the data being
sent will repeated and flood the USB bus. This patch prevents
endpoints from being stalled in the middle of a transfer by control
requests by keeping USB suspended until the setup phase of the
control request is done.
If an IN endpoint is stalled during a transfer by writing to the
USB ENDPOINT register then the data being sent will repeat and flood
the USB bus. This patch prevents the register write from occurring by
instead writing to the buffer descriptor in RAM and letting the USB
hardware handle setting the stall bit.
Note - Control requests on endpoint 0 do still set the STALL bit
directly. This is not a problem since control endpoints cannot be
stalled externally while a transfer is ongoing.
Perform isochronous endpoint processing from the frame interrupt
rather than the endpoint interrupt. Isochronous endpoints to not
generate interrupts normally and are intended to be handled from
the start of frame interrupt.
Set correct SYSMPU register for proper USB operation. This bug was
introduced when the SYSMPU register names and defines were updated
in the commit:
"K64F: Updated the SYSMPU SDK driver"
93f8cfed05
Take the code from
mbed-os\features\unsupported\USBDevice\targets\TARGET_STM
as a starting point and use it to fill in the USBPhy template for STM32
devices.
Implement the USB abort function so interrupts wont fire for a
transfer that has been aborted. The transfer may still take place
but the buffer passed into endpoint_write or endpoint_read will not
be used.
When disconnecting in the middle of a setup packet USB stops working
even after being re-connected. This is because the setup packet
suspended endpoint events but nothing resumed endpoint events.
This patch adds code to resume endpoint events in the reset handler.
Move the USBPhy header files into usb/device/USBPhy. Also move hal
and target USB files since mbed 2 does not compile when these files
are present without the USBPhy headers.
Directory restructure summary:
platform/USBPhy*
to usb/device/USBPhy/USBPhy*
hal/*
to usb/device/hal/*
targets/TARGET_Freescale/usb/*
to usb/device/targets/TARGET_Freescale/*
targets/TARGET_NXP/TARGET_LPC176X/usb/*
to usb/device/targets/TARGET_NXP/*
Cruz Monrreal II
Russ Butler
bcostm
TomoYamanaka
Russ Butler
Michel Jaouen