Add Grand Central M4 (espressif#81)

Author: PaintYourDragon

build_platform.py

@@ -70,6 +70,7 @@
     "pyportal" : "adafruit:samd:adafruit_pyportal_m4:speed=120,usbstack=tinyusb",
     "pyportal_titano" : "adafruit:samd:adafruit_pyportal_m4_titano:speed=120,usbstack=tinyusb",
     "cpx_ada" : "adafruit:samd:adafruit_circuitplayground_m0",
+    "grand_central_m4" : "adafruit:samd:adafruit_grand_central_m4:speed=120,usbstack=tinyusb",
     # Arduino nRF
     "microbit" : "sandeepmistry:nRF5:BBCmicrobit:softdevice=s130",
     # Adafruit nRF

install.sh

@@ -19,7 +19,7 @@ export CPLAY_PLATFORMS='declare -A cplay_platforms=( [cplayClassic]="arduino:avr
 
 export SAMD_PLATFORMS='declare -A samd_platforms=( [zero]="arduino:samd:arduino_zero_native", [cplayExpress]="arduino:samd:adafruit_circuitplayground_m0", [m4]="adafruit:samd:adafruit_metro_m4:speed=120" )'
 
-export M4_PLATFORMS='declare -A m4_platforms=( [m4]="adafruit:samd:adafruit_metro_m4:speed=120", [trellis_m4]="adafruit:samd:adafruit_trellis_m4:speed=120" )'
+export M4_PLATFORMS='declare -A m4_platforms=( [m4]="adafruit:samd:adafruit_metro_m4:speed=120", [trellis_m4]="adafruit:samd:adafruit_trellis_m4:speed=120", [grand_central_m4]="adafruit:samd:adafruit_grand_central_m4:speed=120" )'
 
 export ARCADA_PLATFORMS='declare -A arcada_platforms=( [pybadge]="adafruit:samd:adafruit_pybadge_m4:speed=120", [pygamer]="adafruit:samd:adafruit_pygamer_m4:speed=120", [hallowing_m4]="adafruit:samd:adafruit_hallowing_m4:speed=120", [cplayExpressAda]="adafruit:samd:adafruit_circuitplayground_m0" )'