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add endpoint count checking on stm32f405 #3338

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Merged
merged 2 commits into from
Aug 28, 2020
Merged

add endpoint count checking on stm32f405 #3338

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a03b6a9
gen_usb_descriptor: Fix off-by-1 error in endpoint counting
jepler Aug 27, 2020
563e038
stm: Specify max endpoints for stm32f405xx
jepler Aug 27, 2020
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1 change: 1 addition & 0 deletions ports/stm/mpconfigport.mk
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,7 @@ ifeq ($(MCU_VARIANT),STM32F405xx)
CIRCUITPY_FRAMEBUFFERIO ?= 1
CIRCUITPY_RGBMATRIX ?= 1
CIRCUITPY_SDIOIO ?= 1
USB_NUM_EP = 4
endif

ifeq ($(MCU_SERIES),F4)
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5 changes: 3 additions & 2 deletions tools/gen_usb_descriptor.py
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Expand Up @@ -382,8 +382,9 @@ def strings_in_order(cls):
for interface in interfaces:
for subdescriptor in interface.subdescriptors:
endpoint_address = getattr(subdescriptor, 'bEndpointAddress', 0) & 0x7f
if endpoint_address > args.max_ep:
raise ValueError("Endpoint address %d of %s may not exceed %d" % (endpoint_address & 0x7f, interface.description, args.max_ep))
print("Endpoint %d - vs max_ep %d" % (endpoint_address, args.max_ep))
if endpoint_address >= args.max_ep:
raise ValueError("Endpoint address %d of %s must be less than %d" % (endpoint_address & 0x7f, interface.description, args.max_ep))
else:
print("Unable to check whether maximum number of endpoints is respected", file=sys.stderr)

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