machine: Add support for Adafruit QT2040 board.

Makefile

@@ -597,6 +597,8 @@ endif
 	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=challenger-rp2040    examples/blinky1
 	@$(MD5SUM) test.hex
+	$(TINYGO) build -size short -o test.hex -target=trinkey-qt2040      examples/adc_rp2040
+	@$(MD5SUM) test.hex
 	# test pwm
 	$(TINYGO) build -size short -o test.hex -target=itsybitsy-m0        examples/pwm
 	@$(MD5SUM) test.hex

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 90 microcontroller boards are currently supported:
+The following 91 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)
@@ -67,6 +67,7 @@ The following 90 microcontroller boards are currently supported:
 * [Adafruit PyPortal](https://www.adafruit.com/product/4116)
 * [Adafruit QT Py](https://www.adafruit.com/product/4600)
 * [Adafruit Trinket M0](https://www.adafruit.com/product/3500)
+* [Adafruit Trinkey QT2040](https://adafruit.com/product/5056)
 * [Arduino Mega 1280](https://www.arduino.cc/en/Main/arduinoBoardMega/)
 * [Arduino Mega 2560](https://store.arduino.cc/arduino-mega-2560-rev3)
 * [Arduino MKR1000](https://store.arduino.cc/arduino-mkr1000-wifi)

src/machine/board_trinkey_qt2040.go

@@ -0,0 +1,63 @@
+//go:build trinkey_qt2040
+// +build trinkey_qt2040
+
+// This file contains the pin mappings for the Adafruit Trinkey QT2040 board.
+//
+// The Trinkey QT2040 is a small development board based on the RP2040 which
+// plugs into a USB A port. The board has a minimal pinout: an integrated
+// NeoPixel LED and a STEMMA QT I2C port.
+//
+// - Product:    https://www.adafruit.com/product/5056
+// - Overview:   https://learn.adafruit.com/adafruit-trinkey-qt2040
+// - Pinouts:    https://learn.adafruit.com/adafruit-trinkey-qt2040/pinouts
+// - Datasheets: https://learn.adafruit.com/adafruit-trinkey-qt2040/downloads
+
+package machine
+
+// Onboard crystal oscillator frequency, in MHz
+const xoscFreq = 12 // MHz
+
+// Onboard LEDs
+const (
+	NEOPIXEL = GPIO27
+	WS2812   = NEOPIXEL
+)
+
+// I2C pins
+const (
+	I2C0_SDA_PIN = GPIO16
+	I2C0_SCL_PIN = GPIO17
+
+	I2C1_SDA_PIN = NoPin
+	I2C1_SCL_PIN = NoPin
+)
+
+// SPI pins
+const (
+	SPI0_SCK_PIN = NoPin
+	SPI0_SDO_PIN = NoPin
+	SPI0_SDI_PIN = NoPin
+
+	SPI1_SCK_PIN = NoPin
+	SPI1_SDO_PIN = NoPin
+	SPI1_SDI_PIN = NoPin
+)
+
+// UART pins
+const (
+	UART0_TX_PIN = NoPin
+	UART0_RX_PIN = NoPin
+	UART_TX_PIN  = UART0_TX_PIN
+	UART_RX_PIN  = UART0_RX_PIN
+)
+
+// USB identifiers
+const (
+	usb_STRING_PRODUCT      = "Trinkey QT2040"
+	usb_STRING_MANUFACTURER = "Adafruit"
+)
+
+var (
+	usb_VID uint16 = 0x239a
+	usb_PID uint16 = 0x8109
+)

targets/trinkey-qt2040-boot-stage2.S

@@ -0,0 +1,17 @@
+// Adafruit Trinkey QT2040 Stage 2 Bootloader
+
+//
+// This file defines the parameters specific to the flash-chip found
+// on the Adafruit Trinkey QT2040.  The generic implementation is in
+// rp2040-boot-stage2.S
+//
+
+#define BOARD_PICO_FLASH_SPI_CLKDIV   4
+#define BOARD_CMD_READ                0xe7
+#define BOARD_QUAD_OK                 1
+#define BOARD_QUAD_ENABLE_STATUS_BYTE 2
+#define BOARD_QUAD_ENABLE_BIT_MASK    2
+#define BOARD_SPLIT_STATUS_WRITE      1
+#define BOARD_WAIT_CYCLES             2
+
+#include "rp2040-boot-stage2.S"

targets/trinkey-qt2040.json

@@ -0,0 +1,11 @@
+{
+    "inherits": [
+        "rp2040"
+    ],
+    "serial-port": ["acm:239a:8109"],
+    "build-tags": ["trinkey_qt2040"],
+    "linkerscript": "targets/trinkey-qt2040.ld",
+    "extra-files": [
+        "targets/trinkey-qt2040-boot-stage2.S"
+    ]
+}

targets/trinkey-qt2040.ld

@@ -0,0 +1,10 @@
+
+MEMORY
+{
+    /* Reserve exactly 256 bytes at start of flash for second stage bootloader */
+    BOOT2_TEXT (rx) : ORIGIN = 0x10000000, LENGTH = 256
+    FLASH_TEXT (rx) : ORIGIN = 0x10000000 + 256, LENGTH = 8192K - 256
+    RAM (rwx)       : ORIGIN = 0x20000000, LENGTH = 256k
+}
+
+INCLUDE "targets/rp2040.ld"