Adding support for the Arduino Zero

README.md

@@ -43,7 +43,7 @@ See the [getting started instructions](https://tinygo.org/getting-started/) for
 
 You can compile TinyGo programs for microcontrollers, WebAssembly and Linux.
 
-The following 40 microcontroller boards are currently supported:
+The following 41 microcontroller boards are currently supported:
 
 * [Adafruit Circuit Playground Bluefruit](https://www.adafruit.com/product/4333)
 * [Adafruit Circuit Playground Express](https://www.adafruit.com/product/3333)
@@ -62,6 +62,7 @@ The following 40 microcontroller boards are currently supported:
 * [Arduino Mega 2560](https://store.arduino.cc/arduino-mega-2560-rev3)
 * [Arduino Nano](https://store.arduino.cc/arduino-nano)
 * [Arduino Nano33 IoT](https://store.arduino.cc/nano-33-iot)
+* [Arduino Zero](https://store.arduino.cc/usa/arduino-zero)
 * [Arduino Uno](https://store.arduino.cc/arduino-uno-rev3)
 * [BBC micro:bit](https://microbit.org/)
 * [Digispark](http://digistump.com/products/1)

src/machine/board_arduino_zero.go

@@ -0,0 +1,85 @@
+// +build sam,atsamd21,arduino_zero
+
+package machine
+
+// used to reset into bootloader
+const RESET_MAGIC_VALUE = 0x07738135
+
+// GPIO Pins
+const (
+	D0  = PA11 // RX
+	D1  = PA10 // TX
+	D2  = PA14
+	D3  = PA09 // PWM available
+	D4  = PA08 // PWM available
+	D5  = PA15 // PWM available
+	D6  = PA20 // PWM available
+	D7  = PA21
+	D8  = PA06 // PWM available
+	D9  = PA07 // PWM available
+	D10 = PA18 // PWM available
+	D11 = PA16 // PWM available
+	D12 = PA19 // PWM available
+	D13 = PA17 // PWM available
+)
+
+// LEDs on the Arduino Zero
+const (
+	LED  Pin = D13
+	LED1 Pin = PA27
+	LED2 Pin = PB03
+)
+
+// ADC on the Arduino
+const (
+	ADC0 Pin = PA02
+	ADC1 Pin = PB08
+	ADC2 Pin = PB09
+	ADC3 Pin = PA04
+	ADC4 Pin = PA05
+	ADC5 Pin = PB02
+)
+
+// SPI pins
+const (
+	SPI0_SDO_PIN = PA16 // MOSI: SERCOM1/PAD[0]
+	SPI0_SCK_PIN = PA17 // SCK:  SERCOM1/PAD[1]
+	SPI0_SS_Pin  = PA18 // SS:   SERCOM1/PAD[2]
+	SPI0_SDI_PIN = PA19 // MISO: SERCOM1/PAD[3]
+)
+
+// I2C pins
+const (
+	SDA_PIN Pin = PA22 // SDA: SERCOM3/PAD[0]
+	SCL_PIN Pin = PA23 // SCL: SERCOM3/PAD[1]
+)
+
+// I2S pins
+const (
+	I2S_SCK_PIN Pin = PA10
+	I2S_SD_PIN  Pin = PA07
+	I2S_WS_PIN  Pin = PA11
+)
+
+// UART0 pins - 'promgramming' USB port
+const (
+	UART_TX_PIN Pin = D1
+	UART_RX_PIN Pin = D0
+)
+
+// 'native' USB port pins
+const (
+	USBCDC_DM_PIN Pin = PA25
+	USBCDC_DP_PIN Pin = PA24
+)
+
+// USB CDC identifiers
+const (
+	usb_STRING_PRODUCT      = "Arduino Zero"
+	usb_STRING_MANUFACTURER = "Arduino LLC"
+)
+
+var (
+	usb_VID uint16 = 0x03eb
+	usb_PID uint16 = 0x2157
+)

targets/arduino-zero-native.json

@@ -0,0 +1,6 @@
+{
+    "inherits": ["atsamd21g18a"],
+    "build-tags": ["sam", "atsamd21g18a", "arduino_zero"],
+    "flash-command": "bossac -i -e -w -v -R -U --port={port} --offset=0x2000 {bin}",
+    "flash-1200-bps-reset": "true"
+}

targets/arduino-zero-programming.json

@@ -0,0 +1,9 @@
+{
+    "inherits": ["atsamd21g18a"],
+    "build-tags": ["sam", "atsamd21g18a", "arduino_zero"],
+
+    "flash-method":"openocd",
+    "openocd-transport": "swd",
+    "openocd-target": "at91samdXX",
+    "openocd-interface":"cmsis-dap"
+}