Add BBC microbit platform: NRF51_MICROBIT

This adds the BBC micro:bit platform, based on NRF51822

Initially, add the platform to use whatever version of softdevice is the
default for the NRF51822-based platforms.

Originally written by James, modified for new target inheritance by
Jonathan Austin:

Signed-off-by: Jonathan Austin <jonathan.austin@arm.com>

libraries/mbed/targets/cmsis/TARGET_NORDIC/TARGET_MCU_NRF51822/system_nrf51.c

@@ -83,7 +83,7 @@ void SystemInit(void)
 
     // Start the external 32khz crystal oscillator.
 
-#if defined(TARGET_DELTA_DFCM_NNN40) || defined(TARGET_HRM1017)
+#if defined(TARGET_DELTA_DFCM_NNN40) || defined(TARGET_HRM1017) || defined(TARGET_NRF_LFCLK_RC)
     NRF_CLOCK->LFCLKSRC             = (CLOCK_LFCLKSRC_SRC_RC << CLOCK_LFCLKSRC_SRC_Pos);
 #else
     NRF_CLOCK->LFCLKSRC             = (CLOCK_LFCLKSRC_SRC_Xtal << CLOCK_LFCLKSRC_SRC_Pos);

libraries/mbed/targets/hal/TARGET_NORDIC/TARGET_MCU_NRF51822/TARGET_NRF51_MICROBIT/PinNames.h

@@ -0,0 +1,198 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2013 Nordic Semiconductor
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef MBED_PINNAMES_H
+#define MBED_PINNAMES_H
+
+#include "cmsis.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef enum {
+    PIN_INPUT,
+    PIN_OUTPUT
+} PinDirection;
+
+#define PORT_SHIFT  3
+
+typedef enum {
+    p0  = 0,
+    p1  = 1,
+    p2  = 2,
+    p3  = 3,
+    p4  = 4,
+    p5  = 5,
+    p6  = 6,
+    p7  = 7,
+    p8  = 8,
+    p9  = 9,
+    p10 = 10,
+    p11 = 11,
+    p12 = 12,
+    p13 = 13,
+    p14 = 14,
+    p15 = 15,
+    p16 = 16,
+    p17 = 17,
+    p18 = 18,
+    p19 = 19,
+    p20 = 20,
+    p21 = 21,
+    p22 = 22,
+    p23 = 23,
+    p24 = 24,
+    p25 = 25,
+    p26 = 26,
+    p27 = 27,
+    p28 = 28,
+    p29 = 29,
+    p30 = 30,  
+    
+    //NORMAL PINS...
+    P0_0  = p0,
+    P0_1  = p1,
+    P0_2  = p2,
+    P0_3  = p3,
+    P0_4  = p4,
+    P0_5  = p5,
+    P0_6  = p6,
+    P0_7  = p7,
+    
+    P0_8  = p8,
+    P0_9  = p9,
+    P0_10 = p10,
+    P0_11 = p11,
+    P0_12 = p12,
+    P0_13 = p13,
+    P0_14 = p14,
+    P0_15 = p15,
+    
+    P0_16 = p16,
+    P0_17 = p17,
+    P0_18 = p18,
+    P0_19 = p19,
+    P0_20 = p20,
+    P0_21 = p21,
+    P0_22 = p22,
+    P0_23 = p23,
+    
+    P0_24 = p24,
+    P0_25 = p25,
+    P0_26 = p26,
+    P0_27 = p27,
+    P0_28 = p28,
+    P0_29 = p29,
+    P0_30 = p30,
+
+    //PADS
+    PAD3 = p1,
+    PAD2 = p2,
+    PAD1 = p3,
+    
+
+    //LED MATRIX COLS
+    COL1 = p4,
+    COL2 = p5,
+    COL3 = p6,
+    COL4 = p7,
+    COL5 = p8,
+    COL6 = p9,
+    COL7 = p10,
+    COL8 = p11,
+    COL9 = p12,
+
+    //LED MATRIX ROWS
+    ROW1 = p13,
+    ROW2 = p14,
+    ROW3 = p15,
+
+    //NORMAL PIN (NO SPECIFIED FUNCTIONALITY)
+    //PIN_16
+
+    // BUTTON A
+    BUTTON_A = p17,
+    
+
+    //NORMAL PIN (NO SPECIFIED FUNCTIONALITY)
+    //PIN_18
+    
+    //TARGET RESET
+    TGT_NRESET = p19,
+
+    //NORMAL PIN (NO SPECIFIED FUNCTIONALITY)
+    //PIN_20
+
+    //MASTER OUT SLAVE IN
+    MOSI = p21,
+    
+    //MASTER IN SLAVE OUT
+    MISO = p22,
+
+    //SERIAL CLOCK
+    SCK = p23,
+
+    // RX AND TX PINS
+    TGT_TX = p24,
+    TGT_RX = p25,
+
+    //BUTTON B
+    BUTTON_B = p26,
+    
+    //ACCEL INTERRUPT PINS (MMA8653FC)
+    ACCEL_INT2 = p27,
+    ACCEL_INT1 = p28,
+
+    //MAGENETOMETER INTERRUPT PIN (MAG3110)
+    MAG_INT1 = p29,
+
+    // Not connected
+    NC = (int)0xFFFFFFFF,
+
+    RX_PIN_NUMBER = TGT_RX,
+    TX_PIN_NUMBER = TGT_TX,
+    CTS_PIN_NUMBER = 31, //unused  ** REQUIRES A PROPER FIX **
+    RTS_PIN_NUMBER = 31, //unused 
+
+    // mBed interface Pins
+    USBTX = TX_PIN_NUMBER,
+    USBRX = RX_PIN_NUMBER,
+
+    LED1    = PAD1,
+    LED2    = PAD2,
+    LED3    = PAD3,
+    LED4    = P0_16,
+
+    //SDA (SERIAL DATA LINE)
+    I2C_SDA0 = p30,
+
+    //SCL (SERIAL CLOCK LINE)
+    I2C_SCL0 = p0
+
+} PinName;
+
+typedef enum {
+    PullNone = 0,
+    PullDown = 1,
+    PullUp = 3,
+    PullDefault = PullUp
+} PinMode;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

libraries/mbed/targets/hal/TARGET_NORDIC/TARGET_MCU_NRF51822/TARGET_NRF51_MICROBIT/device.h

@@ -0,0 +1,57 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2013 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef MBED_DEVICE_H
+#define MBED_DEVICE_H
+
+#define DEVICE_PORTIN           1
+#define DEVICE_PORTOUT          1
+#define DEVICE_PORTINOUT        1
+
+#define DEVICE_INTERRUPTIN      1
+
+#define DEVICE_ANALOGIN         1
+#define DEVICE_ANALOGOUT        0
+
+#define DEVICE_SERIAL           1
+
+#define DEVICE_I2C              1
+#define DEVICE_I2CSLAVE         0
+
+#define DEVICE_SPI              1
+#define DEVICE_SPISLAVE         1
+
+#define DEVICE_CAN              0
+
+#define DEVICE_RTC              0
+
+#define DEVICE_ETHERNET         0
+
+#define DEVICE_PWMOUT           1
+
+#define DEVICE_SEMIHOST         0
+#define DEVICE_LOCALFILESYSTEM  0
+
+#define DEVICE_SLEEP            1
+
+#define DEVICE_DEBUG_AWARENESS  0
+
+#define DEVICE_STDIO_MESSAGES   0
+
+#define DEVICE_ERROR_PATTERN    1
+
+#include "objects.h"
+
+#endif

workspace_tools/build_release.py

@@ -85,6 +85,7 @@ OFFICIAL_MBED_LIBRARY_BUILD = (
     ('NRF51_DK',     ('ARM', 'GCC_ARM', 'IAR')),
     ('NRF51_DONGLE', ('ARM', 'GCC_ARM', 'IAR')),
     ('HRM1017',      ('ARM', 'GCC_ARM', 'IAR')),
+    ('NRF51_MICROBIT',      ('ARM')),
     ('ARCH_BLE',     ('ARM', 'GCC_ARM', 'IAR')),
     ('SEEED_TINY_BLE', ('ARM', 'GCC_ARM', 'IAR')),
     ('RBLAB_NRF51822', ('ARM', 'GCC_ARM')),

workspace_tools/targets.py

@@ -1247,6 +1247,53 @@ class NRF51_DONGLE_OTA(MCU_NRF51_32K_OTA):
         self.extra_labels = ['NRF51_DONGLE']
         self.macros += ['TARGET_NRF51_DONGLE']
 
+class NRF51_MICROBIT(MCU_NRF51_16K):
+    def __init__(self):
+        MCU_NRF51_16K.__init__(self)
+        self.EXPECTED_SOFTDEVICES_WITH_OFFSETS = [
+            {
+                'name'   : 's110_nrf51822_8.0.0_softdevice.hex',
+                'boot'   : 's110_nrf51822_8.0.0_bootloader.hex',
+                'offset' : 0x18000
+            },
+            {
+                'name'   : 's110_nrf51822_7.1.0_softdevice.hex',
+                'boot'   : 's110_nrf51822_7.1.0_bootloader.hex',
+                'offset' : 0x16000
+            }
+        ]
+        self.macros += ['TARGET_NRF_LFCLK_RC']
+
+class NRF51_MICROBIT_BOOT(MCU_NRF51_16K_BOOT):
+    def __init__(self):
+        MCU_NRF51_16K_BOOT.__init__(self)
+        self.extra_labels += ['NRF51_MICROBIT']
+        self.macros += ['TARGET_NRF51_MICROBIT', 'TARGET_NRF_LFCLK_RC']
+
+class NRF51_MICROBIT_OTA(MCU_NRF51_16K_OTA):
+    def __init__(self):
+        MCU_NRF51_16K_OTA.__init__(self)
+        self.extra_labels += ['NRF51_MICROBIT']
+        self.macros += ['TARGET_NRF51_MICROBIT', 'TARGET_NRF_LFCLK_RC']
+
+class NRF51_MICROBIT_B(MCU_NRF51_16K):
+    def __init__(self):
+        MCU_NRF51_16K.__init__(self)
+        self.extra_labels += ['NRF51_MICROBIT']
+        self.macros += ['TARGET_NRF51_MICROBIT', 'TARGET_NRF_LFCLK_RC']
+
+class NRF51_MICROBIT_B_BOOT(MCU_NRF51_16K_BOOT):
+    def __init__(self):
+        MCU_NRF51_16K_BOOT.__init__(self)
+        self.extra_labels += ['NRF51_MICROBIT']
+        self.macros += ['TARGET_NRF51_MICROBIT', 'TARGET_NRF_LFCLK_RC']
+
+class NRF51_MICROBIT_B_OTA(MCU_NRF51_16K_OTA):
+    def __init__(self):
+        MCU_NRF51_16K_OTA.__init__(self)
+        self.extra_labels += ['NRF51_MICROBIT']
+        self.macros += ['TARGET_NRF51_MICROBIT', 'TARGET_NRF_LFCLK_RC']
+
         
 ### ARM ###
 
@@ -1547,6 +1594,9 @@ TARGETS = [
     NRF51_DONGLE(),         # nRF51_32K
     NRF51_DONGLE_BOOT(),    # nRF51_32K
     NRF51_DONGLE_OTA(),     # nRF51_32K
+    NRF51_MICROBIT(),       # nRF51_16K - S110
+    NRF51_MICROBIT_B(),       # nRF51_16K - default
+
 
     ### ARM ###
     ARM_MPS2_M0(),