reelboard: support Reel Board (nrf52840 dev board)

Signed-off-by: Ron Evans <ron@hybridgroup.com>

.travis.yml

@@ -27,5 +27,7 @@ script:
   - tinygo build -o blinky1.nrf51d.elf -target=pca10031     examples/blinky1
   - tinygo build -o blinky1.stm32.elf  -target=bluepill     examples/blinky1
   - tinygo build -o blinky1.avr.o      -target=arduino      examples/blinky1 # TODO: avr-as/avr-gcc doesn't work
+  - tinygo build -o blinky1.reel.elf   -target=reelboard    examples/blinky1
+  - tinygo build -o blinky2.reel.elf   -target=reelboard    examples/blinky2
   - tinygo build -o blinky1.pca10056.elf    -target=pca10056     examples/blinky1
   - tinygo build -o blinky2.pca10056.elf    -target=pca10056     examples/blinky2

Makefile

@@ -20,6 +20,11 @@ else ifeq ($(TARGET),microbit)
 OBJCOPY = arm-none-eabi-objcopy
 TGOFLAGS += -target $(TARGET)
 
+else ifeq ($(TARGET),reelboard)
+# reel board
+OBJCOPY = arm-none-eabi-objcopy
+TGOFLAGS += -target $(TARGET)
+
 else ifeq ($(TARGET),bluepill)
 # "blue pill" development board
 # See: https://wiki.stm32duino.com/index.php?title=Blue_Pill
@@ -48,6 +53,9 @@ ifeq ($(TARGET),pca10040)
 flash-%: build/%.hex
 	nrfjprog -f nrf52 --sectorerase --program $< --reset
 else ifeq ($(TARGET),microbit)
+flash-%: build/%.hex
+	openocd -f interface/cmsis-dap.cfg -f target/nrf51.cfg -c 'program $< reset exit'
+else ifeq ($(TARGET),reelboard)
 flash-%: build/%.hex
 	openocd -f interface/cmsis-dap.cfg -f target/nrf51.cfg -c 'program $< reset exit'
 else ifeq ($(TARGET),arduino)

docs/targets.rst

@@ -38,6 +38,8 @@ technology (LLVM) as the proprietary ARM compiler for code generation.
     <https://www.nordicsemi.com/eng/Products/Bluetooth-low-energy/nRF52832>`_)
   * `nRF52840-MDK <https://wiki.makerdiary.com/nrf52840-mdk/>`_ (`nRF52840
     <https://www.nordicsemi.com/eng/Products/nRF52840>`_)
+  * `reel board <https://www.phytec.eu/product-eu/internet-of-things/reelboard/>`_ (`nRF52840
+    <https://www.nordicsemi.com/eng/Products/nRF52840>`_)
   * `Nordic PCA10056 <https://www.nordicsemi.com/Software-and-Tools/Development-Kits/nRF52840-DK>`_ (`nRF52840
     <https://www.nordicsemi.com/eng/Products/nRF52840>`_)
   * `QEMU <https://wiki.qemu.org/Documentation/Platforms/ARM>`_ (`LM3S6965

src/machine/board_reelboard.go

@@ -0,0 +1,35 @@
+// +build reelboard
+
+package machine
+
+const HasLowFrequencyCrystal = true
+
+// LEDs on the reel board
+const (
+	LED        = LED1
+	LED1       = LED_YELLOW
+	LED2       = LED_RED
+	LED3       = LED_GREEN
+	LED4       = LED_BLUE
+	LED_RED    = 11
+	LED_GREEN  = 12
+	LED_BLUE   = 41
+	LED_YELLOW = 13
+)
+
+// User "a" button on the reel board
+const (
+	BUTTON = 7
+)
+
+// UART pins
+const (
+	UART_TX_PIN = 6
+	UART_RX_PIN = 8
+)
+
+// I2C pins
+const (
+	SDA_PIN = 26
+	SCL_PIN = 27
+)

targets/reelboard.json

@@ -0,0 +1,7 @@
+{
+	"inherits": ["nrf52840"],
+	"build-tags": ["reelboard"],
+	"flash": "openocd -f interface/cmsis-dap.cfg -f target/nrf51.cfg -c 'program {hex} reset exit'",
+	"ocd-daemon": ["openocd", "-f", "interface/cmsis-dap.cfg", "-f", "target/nrf51.cfg"],
+	"gdb-initial-cmds": ["target remote :3333", "monitor halt", "load", "monitor reset", "c"]
+}