From 432f43a4725d145a69f8cc128ae96d2f7e2530ec Mon Sep 17 00:00:00 2001
From: Jerry Needell <jerryneedell@gmail.com>
Date: Wed, 5 Aug 2020 11:37:57 -0400
Subject: [PATCH]  freeze rfm9x and BusDevice, remove many built-in modules

---
 .gitmodules                                    |  3 +++
 frozen/Adafruit_CircuitPython_RFM9x            |  1 +
 .../boards/feather_m0_rfm9x/mpconfigboard.mk   | 18 ++++++++++++++++++
 3 files changed, 22 insertions(+)
 create mode 160000 frozen/Adafruit_CircuitPython_RFM9x

diff --git a/.gitmodules b/.gitmodules
index f09a1e4c68..f922aae1db 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -147,3 +147,6 @@
 [submodule "ports/esp32s2/esp-idf"]
 	path = ports/esp32s2/esp-idf
 	url = https://github.com/tannewt/esp-idf.git
+[submodule "frozen/Adafruit_CircuitPython_RFM9x"]
+	path = frozen/Adafruit_CircuitPython_RFM9x
+	url = https://github.com/adafruit/Adafruit_CircuitPython_RFM9x.git
diff --git a/frozen/Adafruit_CircuitPython_RFM9x b/frozen/Adafruit_CircuitPython_RFM9x
new file mode 160000
index 0000000000..b3d270f743
--- /dev/null
+++ b/frozen/Adafruit_CircuitPython_RFM9x
@@ -0,0 +1 @@
+Subproject commit b3d270f743fafa0ed4b3374fadcea350f05be0b8
diff --git a/ports/atmel-samd/boards/feather_m0_rfm9x/mpconfigboard.mk b/ports/atmel-samd/boards/feather_m0_rfm9x/mpconfigboard.mk
index de79638bd3..4d51177dcc 100644
--- a/ports/atmel-samd/boards/feather_m0_rfm9x/mpconfigboard.mk
+++ b/ports/atmel-samd/boards/feather_m0_rfm9x/mpconfigboard.mk
@@ -10,4 +10,22 @@ INTERNAL_FLASH_FILESYSTEM = 1
 LONGINT_IMPL = NONE
 CIRCUITPY_FULL_BUILD = 0
 
+
+# A number of modules are removed for RFM9x to make room for frozen libraries.
+# Many I/O functions are not available.
+# math is very large and is also removed.
+CIRCUITPY_ANALOGIO = 0
+CIRCUITPY_PULSEIO = 0
+CIRCUITPY_NEOPIXEL_WRITE = 1
+CIRCUITPY_ROTARYIO = 0
+CIRCUITPY_RTC = 0
+CIRCUITPY_SAMD = 0
+CIRCUITPY_USB_MIDI = 0
+CIRCUITPY_TOUCHIO = 0
+CFLAGS_INLINE_LIMIT = 35
+# Make more room.
 SUPEROPT_GC = 0
+
+# Include these Python libraries in firmware.
+FROZEN_MPY_DIRS += $(TOP)/frozen/Adafruit_CircuitPython_BusDevice
+FROZEN_MPY_DIRS += $(TOP)/frozen/Adafruit_CircuitPython_RFM9x