nrf: Add WT51822-S4AT board.

ports/nrf/README.md

@@ -28,6 +28,7 @@ This is a port of MicroPython to the Nordic Semiconductor nRF series of chips.
   * PCA10001
   * PCA10028
   * PCA10031 (dongle)
+  * [WT51822-S4AT](http://www.wireless-tag.com/wireless_module/BLE/WT51822-S4AT.html)
 * nRF52832
   * [PCA10040](http://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.nrf52%2Fdita%2Fnrf52%2Fdevelopment%2Fnrf52_dev_kit.html) 
   * [Adafruit Feather nRF52](https://www.adafruit.com/product/3406)
@@ -80,6 +81,7 @@ pca10000             | s110                    | Peripheral             | [Segge
 pca10001             | s110                    | Peripheral             | [Segger](#segger-targets)
 pca10028             | s110                    | Peripheral             | [Segger](#segger-targets)
 pca10031             | s110                    | Peripheral             | [Segger](#segger-targets)
+wt51822_s4at         | s110                    | Peripheral             | Manual, see [datasheet](https://4tronix.co.uk/picobot2/WT51822-S4AT.pdf) for pinout
 pca10040             | s132                    | Peripheral and Central | [Segger](#segger-targets)
 feather52            | s132                    | Peripheral and Central | [UART DFU](#dfu-targets)
 arduino_primo        | s132                    | Peripheral and Central | [PyOCD](#pyocdopenocd-targets)

ports/nrf/boards/wt51822_s4at/mpconfigboard.h

@@ -0,0 +1,65 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2017 Ayke van Laethem
+ *
+ * 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.
+ */
+
+#define WT51822_S4AT
+
+// Datasheet for board:
+// https://4tronix.co.uk/picobot2/WT51822-S4AT.pdf
+#define MICROPY_HW_BOARD_NAME       "WT51822-S4AT"
+#define MICROPY_HW_MCU_NAME         "NRF51822"
+#define MICROPY_PY_SYS_PLATFORM     "nrf51"
+
+#define MICROPY_PY_MACHINE_HW_SPI   (1)
+#define MICROPY_PY_MACHINE_TIMER    (1)
+#define MICROPY_PY_MACHINE_RTC      (1)
+#define MICROPY_PY_MACHINE_I2C      (1)
+#define MICROPY_PY_MACHINE_ADC      (1)
+#define MICROPY_PY_MACHINE_TEMP     (1)
+
+#define MICROPY_HW_HAS_LED          (0)
+#define MICROPY_HW_HAS_SWITCH       (0)
+#define MICROPY_HW_HAS_FLASH        (0)
+#define MICROPY_HW_HAS_SDCARD       (0)
+#define MICROPY_HW_HAS_MMA7660      (0)
+#define MICROPY_HW_HAS_LIS3DSH      (0)
+#define MICROPY_HW_HAS_LCD          (0)
+#define MICROPY_HW_ENABLE_RNG       (0)
+#define MICROPY_HW_ENABLE_RTC       (0)
+#define MICROPY_HW_ENABLE_TIMER     (0)
+#define MICROPY_HW_ENABLE_SERVO     (0)
+#define MICROPY_HW_ENABLE_DAC       (0)
+#define MICROPY_HW_ENABLE_CAN       (0)
+
+// UART config
+#define MICROPY_HW_UART1_RX         (pin_A1)
+#define MICROPY_HW_UART1_TX         (pin_A2)
+#define MICROPY_HW_UART1_HWFC       (0)
+
+// SPI0 config
+#define MICROPY_HW_SPI0_NAME        "SPI0"
+#define MICROPY_HW_SPI0_SCK         (pin_A9)
+#define MICROPY_HW_SPI0_MOSI        (pin_A10)
+#define MICROPY_HW_SPI0_MISO        (pin_A13)

ports/nrf/boards/wt51822_s4at/mpconfigboard.mk

@@ -0,0 +1,4 @@
+MCU_SERIES = m0
+MCU_VARIANT = nrf51
+MCU_SUB_VARIANT = nrf51822
+LD_FILE = boards/nrf51x22_256k_16k.ld

ports/nrf/boards/wt51822_s4at/mpconfigboard_s110.mk

@@ -0,0 +1,7 @@
+MCU_SERIES = m0
+MCU_VARIANT = nrf51
+MCU_SUB_VARIANT = nrf51822
+SOFTDEV_VERSION = 8.0.0
+LD_FILE = boards/nrf51x22_256k_16k_s110_$(SOFTDEV_VERSION).ld
+
+CFLAGS += -DBLUETOOTH_LFCLK_RC

ports/nrf/boards/wt51822_s4at/nrf51_hal_conf.h

@@ -0,0 +1,14 @@
+#ifndef NRF51_HAL_CONF_H__
+#define NRF51_HAL_CONF_H__
+
+#define HAL_UART_MODULE_ENABLED
+#define HAL_SPI_MODULE_ENABLED
+#define HAL_TIME_MODULE_ENABLED
+#define HAL_RTC_MODULE_ENABLED
+#define HAL_TIMER_MODULE_ENABLED
+#define HAL_TWI_MODULE_ENABLED
+#define HAL_ADC_MODULE_ENABLED
+#define HAL_TEMP_MODULE_ENABLED
+#define HAL_RNG_MODULE_ENABLED
+
+#endif // NRF51_HAL_CONF_H__

ports/nrf/boards/wt51822_s4at/pins.csv

@@ -0,0 +1,7 @@
+PA1,PA1
+PA2,PA2
+PA3,PA3
+PA4,PA4
+PA9,PA9
+PA10,PA10
+PA13,PA13