Adding SparkFun nRF52840 Mini board support

.travis.yml

@@ -21,7 +21,7 @@ git:
 # that SDK is shortest and add it there.  In the case of major re-organizations,
 # just try to make the builds "about equal in run time"
 env:
-  - TRAVIS_TESTS="unix docs translations website" TRAVIS_BOARDS="feather_huzzah circuitplayground_express mini_sam_m4 grandcentral_m4_express pca10056 pca10059 feather_nrf52832 feather_nrf52840_express makerdiary_nrf52840_mdk particle_boron particle_argon particle_xenon" TRAVIS_SDK=arm:nrf:esp8266
+  - TRAVIS_TESTS="unix docs translations website" TRAVIS_BOARDS="feather_huzzah circuitplayground_express mini_sam_m4 grandcentral_m4_express pca10056 pca10059 feather_nrf52832 feather_nrf52840_express makerdiary_nrf52840_mdk particle_boron particle_argon particle_xenon sparkfun_nrf52840_mini" TRAVIS_SDK=arm:nrf:esp8266
   - TRAVIS_BOARDS="metro_m0_express metro_m4_express pirkey_m0 trellis_m4_express trinket_m0" TRAVIS_SDK=arm
   - TRAVIS_BOARDS="feather_radiofruit_zigbee gemma_m0 hallowing_m0_express itsybitsy_m0_express itsybitsy_m4_express meowmeow" TRAVIS_SDK=arm
   - TRAVIS_BOARDS="feather_m0_express_crickit feather_m0_rfm69 feather_m0_rfm9x feather_m4_express arduino_zero arduino_mkr1300" TRAVIS_SDK=arm

ports/nrf/boards/sparkfun_nrf52840_mini/README.md

@@ -0,0 +1,48 @@
+# SparkFun Pro nRF52840 Mini Breakout
+
+The [SparkFun Pro nRF52840 Mini](https://www.sparkfun.com/products/15025) small breakout board for Raytac's MDBT50Q-P1M module, which features an nRF52840. It breaks out as many pins as it can in an Arduino Pro Mini footprint. Also included on the board are a qwiic (I<sup>2</sup>C) connector, LiPo battery charger, and on/off switch.
+
+Note: the SparkFun Pro nRF52840 Mini Breakout does not include a QSPI external flash. Any Python code will need to be stored on the internal flash filesystem.
+
+## CircuitPython Pin Defs
+
+CircuitPython pin definitions try to follow those of the [Arduino Pro Mini](https://www.sparkfun.com/products/11113), which the footprint is based on.
+
+This can be somewhat confusing, especially around the analog pins. Here's a quick pin-map:
+
+<table>
+<tr><th>Board pin label</th><th>Digital Pin Reference</th><th>Additional Pin Capabilities</th><th>Pin/Port Reference</th></tr>
+<tr><td>17</td><td>D1</td><td>TX</td><td>P0_17</td></tr>
+<tr><td>15</td><td>D0</td><td>RX</td><td>P0_15</td></tr>
+<tr><td>8</td><td></td><td>SDA</td><td>P0_08</td></tr>
+<tr><td>11</td><td></td><td>SCL</td><td>P0_11</td></tr>
+<tr><td>19</td><td>D3</td><td></td><td>P0_19</td></tr>
+<tr><td>20</td><td>D4</td><td></td><td>P0_20</td></tr>
+<tr><td>21</td><td>D5</td><td></td><td>P0_21</td></tr>
+<tr><td>22</td><td>D6</td><td></td><td>P0_22</td></tr>
+<tr><td>23</td><td>D7</td><td></td><td>P0_23</td></tr>
+<tr><td>9</td><td>D8</td><td></td><td>P0_09</td></tr>
+<tr><td>10</td><td>D9</td><td></td><td>P0_10</td></tr>
+<tr><td>2</td><td>D10</td><td>A0</td><td>P0_02</td></tr>
+<tr><td>3</td><td>D11</td><td>MOSI, A1</td><td>P0_03</td></tr>
+<tr><td>31</td><td>D12</td><td>MISO, A7</td><td>P0_31</td></tr>
+<tr><td>30</td><td>D13</td><td>SCK, A6</td><td>P0_31</td></tr>
+<tr><td>29</td><td></td><td>A5</td><td>P0_29</td></tr>
+<tr><td>28</td><td></td><td>A4</td><td>P0_28</td></tr>
+<tr><td>5</td><td></td><td>A3</td><td>P0_05</td></tr>
+<tr><td>4</td><td></td><td>A2</td><td>P0_04</td></tr>
+</table>
+
+If a pin isn't defined as D0, D1, etc., standard port/pin references should work -- e.g. `P0_17` is pin 17, `P0_02` is pin 2, etc.
+
+## Bootloader Notes
+
+The nRF52840 Mini ships with a slightly modified (i.e pin defs and USB defs) version of the Adafruit nRF52 bootloader, which supports UF2 and CDC bootloading.
+
+## Hardware Reference
+
+The nRF52840 Mini hardware layout is open source:
+
+* [Schematic](https://cdn.sparkfun.com/assets/learn_tutorials/8/2/0/nrf52840-breakout-mdbt50q-v10.pdf)
+* [Eagle Files](https://cdn.sparkfun.com/assets/learn_tutorials/8/2/0/nrf52840-breakout-mdbt50q-v10.zip)
+* [Hookup Guide](https://learn.sparkfun.com/tutorials/sparkfun-pro-nrf52840-mini-hookup-guide)

ports/nrf/boards/sparkfun_nrf52840_mini/board.c

@@ -0,0 +1,38 @@
+/*
+ * 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"
+
+void board_init(void) {
+}
+
+bool board_requests_safe_mode(void) {
+  return false;
+}
+
+void reset_board(void) {
+
+}

ports/nrf/boards/sparkfun_nrf52840_mini/mpconfigboard.h

@@ -0,0 +1,68 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2016 Glenn Ruben Bakke
+ *
+ * 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 "nrfx/hal/nrf_gpio.h"
+
+#define MICROPY_HW_BOARD_NAME       "SparkFun Pro nRF52840 Mini"
+#define MICROPY_HW_MCU_NAME         "nRF52840"
+#define MICROPY_PY_SYS_PLATFORM     "SFE_NRF52840_Mini"
+
+#define PORT_HEAP_SIZE              (128 * 1024)
+#define CIRCUITPY_AUTORELOAD_DELAY_MS 500
+
+#define DEFAULT_I2C_BUS_SCL         (&pin_P0_11)
+#define DEFAULT_I2C_BUS_SDA         (&pin_P0_08)
+
+#define DEFAULT_SPI_BUS_SCK         (&pin_P0_30)
+#define DEFAULT_SPI_BUS_MOSI        (&pin_P0_03)
+#define DEFAULT_SPI_BUS_MISO        (&pin_P0_31)
+
+#define DEFAULT_UART_BUS_RX         (&pin_P0_15)
+#define DEFAULT_UART_BUS_TX         (&pin_P0_17)
+
+/* Note: Flash chip is not provided on SparkFun nRF52840 Mini.
+ * Leaving this as a reminder for future/similar versions of the board. */
+// Flash operation mode is determined by MICROPY_QSPI_DATAn pin configuration.
+// A pin config is valid if it is defined and its value is not 0xFF.
+// Quad   mode: If all DATA0 --> DATA3 are valid
+// Dual   mode: If DATA0 and DATA1 are valid while either DATA2 and/or DATA3 are invalid
+// Single mode: If only DATA0 is valid
+/*#ifdef QSPI_FLASH_FILESYSTEM
+#define MICROPY_QSPI_DATA0                NRF_GPIO_PIN_MAP(0, 20)
+#define MICROPY_QSPI_DATA1                NRF_GPIO_PIN_MAP(0, 21)
+#define MICROPY_QSPI_DATA2                NRF_GPIO_PIN_MAP(0, 22)
+#define MICROPY_QSPI_DATA3                NRF_GPIO_PIN_MAP(0, 23)
+#define MICROPY_QSPI_SCK                  NRF_GPIO_PIN_MAP(0, 19)
+#define MICROPY_QSPI_CS NRF_GPIO_PIN_MAP(0, 17)
+#endif
+
+#ifdef SPI_FLASH_FILESYSTEM
+#define SPI_FLASH_MOSI_PIN &pin_P0_20
+#define SPI_FLASH_MISO_PIN &pin_P0_21
+#define SPI_FLASH_SCK_PIN &pin_P0_19
+#define SPI_FLASH_CS_PIN &pin_P0_17
+#endif*/
+

ports/nrf/boards/sparkfun_nrf52840_mini/mpconfigboard.mk

@@ -0,0 +1,25 @@
+USB_VID = 0x1B4F
+USB_PID = 0x5289
+USB_PRODUCT = "SFE_nRF52840_Mini"
+USB_MANUFACTURER = "SparkFun Electronics"
+
+MCU_SERIES = m4
+MCU_VARIANT = nrf52
+MCU_SUB_VARIANT = nrf52840
+MCU_CHIP = nrf52840
+SD ?= s140
+SOFTDEV_VERSION ?= 6.1.0
+
+BOOT_SETTING_ADDR = 0xFF000
+
+ifeq ($(SD),)
+	LD_FILE = boards/nrf52840_1M_256k.ld
+else
+	LD_FILE = boards/adafruit_$(MCU_SUB_VARIANT)_$(SD_LOWER)_v$(firstword $(subst ., ,$(SOFTDEV_VERSION))).ld
+endif
+
+NRF_DEFINES += -DNRF52840_XXAA -DNRF52840
+
+QSPI_FLASH_FILESYSTEM = 0 
+EXTERNAL_FLASH_DEVICE_COUNT = 0 
+EXTERNAL_FLASH_DEVICES = 

ports/nrf/boards/sparkfun_nrf52840_mini/pins.c

@@ -0,0 +1,55 @@
+#include "shared-bindings/board/__init__.h"
+
+#include "board_busses.h"
+
+STATIC const mp_rom_map_elem_t board_module_globals_table[] = {
+    { MP_ROM_QSTR(MP_QSTR_D0), MP_ROM_PTR(&pin_P1_15) },      // D1/TX
+    { MP_ROM_QSTR(MP_QSTR_D1), MP_ROM_PTR(&pin_P0_17) },      // D0/RX
+	                                                          // D2 on qwiic gap
+    { MP_ROM_QSTR(MP_QSTR_D3), MP_ROM_PTR(&pin_P0_19) },      // D3
+    { MP_ROM_QSTR(MP_QSTR_D4), MP_ROM_PTR(&pin_P0_20) },      // D4
+    { MP_ROM_QSTR(MP_QSTR_D5), MP_ROM_PTR(&pin_P0_21) },      // D5
+    { MP_ROM_QSTR(MP_QSTR_D6), MP_ROM_PTR(&pin_P0_22) },      // D6
+    { MP_ROM_QSTR(MP_QSTR_D7), MP_ROM_PTR(&pin_P0_23) },      // D7
+    { MP_ROM_QSTR(MP_QSTR_D8), MP_ROM_PTR(&pin_P0_09) },      // D8
+    { MP_ROM_QSTR(MP_QSTR_D9), MP_ROM_PTR(&pin_P0_10) },      // D9
+
+    { MP_ROM_QSTR(MP_QSTR_D10), MP_ROM_PTR(&pin_P0_02) },     // D10
+    { MP_ROM_QSTR(MP_QSTR_D11), MP_ROM_PTR(&pin_P0_03) },     // D11
+    { MP_ROM_QSTR(MP_QSTR_D12), MP_ROM_PTR(&pin_P0_31) },     // D12
+    { MP_ROM_QSTR(MP_QSTR_D13), MP_ROM_PTR(&pin_P0_30) },     // D13
+    { MP_ROM_QSTR(MP_QSTR_D14), MP_ROM_PTR(&pin_P0_29) },     // D14
+    { MP_ROM_QSTR(MP_QSTR_D15), MP_ROM_PTR(&pin_P0_28) },     // D15
+    { MP_ROM_QSTR(MP_QSTR_D16), MP_ROM_PTR(&pin_P0_05) },     // D16
+    { MP_ROM_QSTR(MP_QSTR_D17), MP_ROM_PTR(&pin_P0_04) },     // D17
+
+    { MP_ROM_QSTR(MP_QSTR_A0), MP_ROM_PTR(&pin_P0_02) },      // A0
+    { MP_ROM_QSTR(MP_QSTR_A1), MP_ROM_PTR(&pin_P0_03) },      // A1
+    { MP_ROM_QSTR(MP_QSTR_A2), MP_ROM_PTR(&pin_P0_04) },      // A2
+    { MP_ROM_QSTR(MP_QSTR_A3), MP_ROM_PTR(&pin_P0_05) },      // A3
+    { MP_ROM_QSTR(MP_QSTR_A4), MP_ROM_PTR(&pin_P0_28) },      // A4
+    { MP_ROM_QSTR(MP_QSTR_A5), MP_ROM_PTR(&pin_P0_29) },      // A5
+    { MP_ROM_QSTR(MP_QSTR_A6), MP_ROM_PTR(&pin_P0_30) },      // A6
+    { MP_ROM_QSTR(MP_QSTR_A7), MP_ROM_PTR(&pin_P0_31) },      // A7
+
+    { MP_ROM_QSTR(MP_QSTR_SDA), MP_ROM_PTR(&pin_P0_08) },     // 8 - SDA
+    { MP_ROM_QSTR(MP_QSTR_SCL), MP_ROM_PTR(&pin_P0_11) },     // 11 - SCL
+
+    { MP_ROM_QSTR(MP_QSTR_MISO), MP_ROM_PTR(&pin_P0_31) },    // 31 - MISO
+    { MP_ROM_QSTR(MP_QSTR_MOSI), MP_ROM_PTR(&pin_P0_03) },    // 3 - MOSI
+    { MP_ROM_QSTR(MP_QSTR_SCK), MP_ROM_PTR(&pin_P0_30) },     // 30 - SCK
+
+    { MP_ROM_QSTR(MP_QSTR_LED1), MP_ROM_PTR(&pin_P0_07)  },   // 7 - Blue LED
+
+    { MP_ROM_QSTR(MP_QSTR_BUTTON1), MP_ROM_PTR(&pin_P0_13) }, // 13 - Button
+
+    { MP_ROM_QSTR(MP_QSTR_RX), MP_ROM_PTR(&pin_P0_15) },      // 15 - UART RX
+    { MP_ROM_QSTR(MP_QSTR_TX), MP_ROM_PTR(&pin_P0_17) },      // 17 - UART TX
+
+    { MP_ROM_QSTR(MP_QSTR_UART), MP_ROM_PTR(&board_uart_obj) },
+    { MP_ROM_QSTR(MP_QSTR_SPI), MP_ROM_PTR(&board_spi_obj) },
+    { MP_ROM_QSTR(MP_QSTR_QWIIC), MP_ROM_PTR(&board_i2c_obj) },
+    { MP_ROM_QSTR(MP_QSTR_I2C), MP_ROM_PTR(&board_i2c_obj) },
+};
+
+MP_DEFINE_CONST_DICT(board_module_globals, board_module_globals_table);