MCU_FAMILY = MIMXRT1062 MCU_SERIES = MIMXRT1062 MCU_LDSCRIPT = MIMXRT1062 MCU_STARTUP = MIMXRT1062 BOARD = IC_TEENSY_4_1 MCU = cortex-m4 ARMV = 7 # Bootloader selection BOOTLOADER = halfkay FIRMWARE_FORMAT = hex