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| author | Michael Welter <michael@welter-4d.de> | 2017-02-04 16:15:13 +0100 |
|---|---|---|
| committer | Michael Welter <mw.pub@welter-4d.de> | 2017-02-12 11:22:36 +0100 |
| commit | c6012a4be50a2d89cbf06deb4376aefc339d7fe8 (patch) | |
| tree | 8e89498307c216a89cd98cf52fd288ef9d1c72e9 | |
| parent | 12522f3726f11ed884d3ebb0bf22650f707b0fb1 (diff) | |
Autodetect the fastest speed with which various Teensy boards can run. Alternatively, set the speed in MHz via BOARD_SUB.
| -rw-r--r-- | Teensy.mk | 15 |
1 files changed, 12 insertions, 3 deletions
@@ -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)),) |