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Autodetect the fastest speed with which various Teensy boards can run. Alternatively, set the speed in MHz via BOARD_SUB.

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Michael Welter 2017-02-04 16:15:13 +01:00 committed by Michael Welter
parent 12522f3726
commit c6012a4be5
1 changed files with 12 additions and 3 deletions
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15
Teensy.mk
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@ -37,15 +37,24 @@ ARDMK_VENDOR = teensy
ARDUINO_CORE_PATH = $(ARDUINO_DIR)/hardware/teensy/avr/cores/teensy3
BOARDS_TXT = $(ARDUINO_DIR)/hardware/$(ARDMK_VENDOR)/avr/boards.txt
ifndef F_CPU
F_CPU=96000000
endif
ifndef PARSE_TEENSY
# result = $(call READ_BOARD_TXT, 'boardname', 'parameter')
PARSE_TEENSY = $(shell grep -v "^\#" "$(BOARDS_TXT)" | grep $(1).$(2) | cut -d = -f 2- )
endif
ifndef F_CPU
ifndef BOARD_SUB
SPEEDS := $(call PARSE_TEENSY,"$(BOARD_TAG),menu.speed.*.build.fcpu") # Obtain sequence of supported frequencies.
SPEEDS := $(shell printf "%d\n" $(SPEEDS) | sort -g) # Sort it, just in case. Printf to re-append newlines so that sort works.
F_CPU := $(lastword $(SPEEDS)) # List is sorted in ascending order. Take the fastest speed.
#$(info "speeds is " $(SPEEDS)) # Good for debugging
else
F_CPU := $(call PARSE_TEENSY,$(BOARD_TAG),menu.speed.$(BOARD_SUB).build.fcpu)
endif
endif
# if boards.txt gets modified, look there, else hard code it
ARCHITECTURE = $(call PARSE_TEENSY,$(BOARD_TAG),build.architecture)
ifeq ($(strip $(ARCHITECTURE)),)