diff --git a/.travis.yml b/.travis.yml
index f1ba0c2a10..102fcc17b8 100755
--- a/.travis.yml
+++ b/.travis.yml
@@ -33,6 +33,7 @@ env:
   - TRAVIS_BOARD=hallowing_m0_express
   - TRAVIS_BOARD=feather_nrf52832
   - TRAVIS_BOARD=feather_nrf52840_express
+  - TRAVIS_BOARD=trellis_m4_express
 
 addons:
   artifacts:
diff --git a/ports/atmel-samd/boards/feather_radiofruit_zigbee/pins.c b/ports/atmel-samd/boards/feather_radiofruit_zigbee/pins.c
index 8a830f4baa..cd111e1745 100755
--- a/ports/atmel-samd/boards/feather_radiofruit_zigbee/pins.c
+++ b/ports/atmel-samd/boards/feather_radiofruit_zigbee/pins.c
@@ -42,5 +42,6 @@ STATIC const mp_rom_map_elem_t board_global_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_CLKM), MP_ROM_PTR(&pin_PC16) },
     { MP_ROM_QSTR(MP_QSTR_RF_SCK), MP_ROM_PTR(&pin_PC18) },
     { MP_ROM_QSTR(MP_QSTR_RF_MISO), MP_ROM_PTR(&pin_PC19) },
+    { MP_ROM_QSTR(MP_QSTR_RESETN), MP_ROM_PTR(&pin_PB15) },
 };
 MP_DEFINE_CONST_DICT(board_module_globals, board_global_dict_table);
diff --git a/ports/atmel-samd/boards/trellis_m4_express/board.c b/ports/atmel-samd/boards/trellis_m4_express/board.c
new file mode 100644
index 0000000000..0f60736a24
--- /dev/null
+++ b/ports/atmel-samd/boards/trellis_m4_express/board.c
@@ -0,0 +1,39 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2017 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "boards/board.h"
+#include "mpconfigboard.h"
+#include "hal/include/hal_gpio.h"
+
+void board_init(void) {
+}
+
+bool board_requests_safe_mode(void) {
+    return false;
+}
+
+void reset_board(void) {
+}
diff --git a/ports/atmel-samd/boards/trellis_m4_express/mpconfigboard.h b/ports/atmel-samd/boards/trellis_m4_express/mpconfigboard.h
new file mode 100644
index 0000000000..117a8ae8e3
--- /dev/null
+++ b/ports/atmel-samd/boards/trellis_m4_express/mpconfigboard.h
@@ -0,0 +1,40 @@
+#define MICROPY_HW_BOARD_NAME "Adafruit Trellis M4 Express"
+#define MICROPY_HW_MCU_NAME "samd51g19"
+
+#define CIRCUITPY_MCU_FAMILY samd51
+
+// This is for Rev A
+#define MICROPY_HW_APA102_MOSI   (&pin_PA01)
+#define MICROPY_HW_APA102_SCK    (&pin_PA00)
+
+#define CIRCUITPY_BITBANG_APA102
+
+// These are pins not to reset.
+// QSPI Data pins & DotStar pins
+#define MICROPY_PORT_A (PORT_PA00 | PORT_PA01 | PORT_PA08 | PORT_PA09 | PORT_PA10 | PORT_PA11)
+// QSPI CS, and QSPI SCK
+#define MICROPY_PORT_B (PORT_PB10 | PORT_PB11)
+#define MICROPY_PORT_C (0)
+#define MICROPY_PORT_D (0)
+
+#define AUTORESET_DELAY_MS 500
+
+// If you change this, then make sure to update the linker scripts as well to
+// make sure you don't overwrite code
+#define CIRCUITPY_INTERNAL_NVM_SIZE 8192
+
+#define BOARD_FLASH_SIZE (0x00040000 - 0x2000 - CIRCUITPY_INTERNAL_NVM_SIZE)
+
+#include "external_flash/devices.h"
+
+#define EXTERNAL_FLASH_DEVICE_COUNT 1
+#define EXTERNAL_FLASH_DEVICES GD25Q64C
+
+#include "external_flash/external_flash.h"
+
+#define DEFAULT_I2C_BUS_SCL (&pin_PB08)
+#define DEFAULT_I2C_BUS_SDA (&pin_PB09)
+
+// USB is always used internally so skip the pin objects for it.
+#define IGNORE_PIN_PA24     1
+#define IGNORE_PIN_PA25     1
diff --git a/ports/atmel-samd/boards/trellis_m4_express/mpconfigboard.mk b/ports/atmel-samd/boards/trellis_m4_express/mpconfigboard.mk
new file mode 100644
index 0000000000..3841a87c76
--- /dev/null
+++ b/ports/atmel-samd/boards/trellis_m4_express/mpconfigboard.mk
@@ -0,0 +1,11 @@
+LD_FILE = boards/samd51x19-bootloader-external-flash.ld
+USB_VID = 0x239A
+USB_PID = 0x8030
+USB_PRODUCT = "Trellis M4 Express"
+USB_MANUFACTURER = "Adafruit Industries LLC"
+
+QSPI_FLASH_FILESYSTEM = 1
+LONGINT_IMPL = MPZ
+
+CHIP_VARIANT = SAMD51G19A
+CHIP_FAMILY = samd51
diff --git a/ports/atmel-samd/boards/trellis_m4_express/pins.c b/ports/atmel-samd/boards/trellis_m4_express/pins.c
new file mode 100644
index 0000000000..57abfeba4d
--- /dev/null
+++ b/ports/atmel-samd/boards/trellis_m4_express/pins.c
@@ -0,0 +1,44 @@
+#include "shared-bindings/board/__init__.h"
+
+#include "board_busses.h"
+
+// This mapping only includes functional names because pins broken
+// out on connectors are labeled with their MCU name available from
+// microcontroller.pin.
+STATIC const mp_rom_map_elem_t board_global_dict_table[] = {
+    { MP_OBJ_NEW_QSTR(MP_QSTR_A0),  MP_ROM_PTR(&pin_PA02) },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_A1),  MP_ROM_PTR(&pin_PA05) },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_A2),  MP_ROM_PTR(&pin_PA04) }, // INT pin
+    { MP_OBJ_NEW_QSTR(MP_QSTR_MICOUT),  MP_ROM_PTR(&pin_PA06) },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_MICIN),  MP_ROM_PTR(&pin_PA07) },
+
+    { MP_OBJ_NEW_QSTR(MP_QSTR_SDA), MP_ROM_PTR(&pin_PB08) },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_SCL), MP_ROM_PTR(&pin_PB09) },
+
+    // Key Grid columns
+    { MP_OBJ_NEW_QSTR(MP_QSTR_COL0),  MP_ROM_PTR(&pin_PA14) },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_COL1),  MP_ROM_PTR(&pin_PA15) },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_COL2),  MP_ROM_PTR(&pin_PA16) },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_COL3),  MP_ROM_PTR(&pin_PA17) },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_COL4),  MP_ROM_PTR(&pin_PA20) },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_COL5),  MP_ROM_PTR(&pin_PA21) },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_COL6),  MP_ROM_PTR(&pin_PA22) },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_COL7),  MP_ROM_PTR(&pin_PA23) },
+    // Key Grid rows
+    { MP_OBJ_NEW_QSTR(MP_QSTR_ROW0),  MP_ROM_PTR(&pin_PA18) },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_ROW1),  MP_ROM_PTR(&pin_PA19) },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_ROW2),  MP_ROM_PTR(&pin_PB22) },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_ROW3),  MP_ROM_PTR(&pin_PB23) },
+
+    // IRQ/GPIO pin
+    { MP_OBJ_NEW_QSTR(MP_QSTR_INT), MP_ROM_PTR(&pin_PA04) },
+
+    // NeoPixels
+    { MP_OBJ_NEW_QSTR(MP_QSTR_NEOPIXEL), MP_ROM_PTR(&pin_PA27) },
+
+    { MP_ROM_QSTR(MP_QSTR_APA102_MOSI), MP_ROM_PTR(&pin_PA01) },
+    { MP_ROM_QSTR(MP_QSTR_APA102_SCK), MP_ROM_PTR(&pin_PA00) },
+
+    { MP_ROM_QSTR(MP_QSTR_I2C), MP_ROM_PTR(&board_i2c_obj) },
+};
+MP_DEFINE_CONST_DICT(board_module_globals, board_global_dict_table);
diff --git a/tools/build_adafruit_bins.sh b/tools/build_adafruit_bins.sh
index aab67cb900..e0899ba701 100755
--- a/tools/build_adafruit_bins.sh
+++ b/tools/build_adafruit_bins.sh
@@ -27,6 +27,7 @@ metro_m0_express \
 metro_m4_express \
 pirkey_m0 \
 trinket_m0 \
+trellis_m4_express \
 "
 ROSIE_SETUPS="rosie-ci"