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Add CRC8 calculation subsystem to quantum (#12641)

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* Intended usage is data validation in split transport code.
* Default space efficient algorithm.
* Opt-in fast table based algorithmn with #define CRC8_USE_TABLE switch.
* Define switches for size and speed optimized versions, the default is size
  optimized by using uint_least8_t as datatype for calculations.
  * #define CRC8_OPTIMIZE_SPEED uses uint_fast8_t as datatype for
    calculations, this only affects 32-bit Archs like ARM and RISC-V.
* Placeholder crc_init() function for hardware backed crc calculation,
  not implemented yet.
This commit is contained in:
Stefan Kerkmann 2021-06-18 01:09:43 +02:00 • committed by GitHub
parent 67fa2568fe
commit ef92c9ee2c
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4 changed files with 115 additions and 0 deletions
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6
common_features.mk
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@ -530,6 +530,7 @@ endif
ifeq ($(strip $(SPLIT_KEYBOARD)), yes)
POST_CONFIG_H += $(QUANTUM_DIR)/split_common/post_config.h
OPT_DEFS += -DSPLIT_KEYBOARD
CRC_ENABLE := yes
# Include files used by all split keyboards
QUANTUM_SRC += $(QUANTUM_DIR)/split_common/split_util.c
@ -557,6 +558,11 @@ ifeq ($(strip $(SPLIT_KEYBOARD)), yes)
COMMON_VPATH += $(QUANTUM_PATH)/split_common
endif
ifeq ($(strip $(CRC_ENABLE)), yes)
OPT_DEFS += -DCRC_ENABLE
QUANTUM_LIB_SRC += crc.c
endif
HAPTIC_ENABLE ?= no
ifneq ($(strip $(HAPTIC_ENABLE)),no)
COMMON_VPATH += $(DRIVER_PATH)/haptic