dsd6_nrf52832: DS-D6 board support

From c4579ff251/micropython/Adafruit_nRF52_Bootloader-dsd6.diff

[daniel@redfelineninja.org.uk: Rebased and split into smaller patches]

src/boards/dsd6_nrf52832/board.h

@@ -0,0 +1,57 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2018 Ha Thach 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.
+ */
+
+#ifndef _DSD6_NRF52832_H
+#define _DSD6_NRF52832_H
+
+/*------------------------------------------------------------------*/
+/* LED
+ *------------------------------------------------------------------*/
+#define LEDS_NUMBER        0
+//#define LED_PRIMARY_PIN    9 // Red
+//#define LED_SECONDARY_PIN  10 // Blue
+#define LED_STATE_ON       1
+
+/*------------------------------------------------------------------*/
+/* BUTTON
+ *------------------------------------------------------------------*/
+#define BUTTONS_NUMBER     1
+#define BUTTON_1           30
+//#define BUTTON_2           31
+#define BUTTON_PULL        NRF_GPIO_PIN_PULLUP
+
+/*------------------------------------------------------------------*/
+/* UART
+ *------------------------------------------------------------------*/
+#define RX_PIN_NUMBER      22
+#define TX_PIN_NUMBER      23
+#define CTS_PIN_NUMBER     0
+#define RTS_PIN_NUMBER     0
+#define HWFC               false
+
+// Used as model string in OTA mode
+#define BLEDIS_MANUFACTURER   "Desay"
+#define BLEDIS_MODEL          "DS-D6"
+
+#endif // _DSD6_NRF52832_H