Add new targets/esp32s3-box-3

GNUmakefile

@@ -992,6 +992,8 @@ endif
 	@$(MD5SUM) test.bin
 	$(TINYGO) build -size short -o test.bin -target=esp32c3-12f         examples/blinky1
 	@$(MD5SUM) test.bin
+	$(TINYGO) build -size short -o test.bin -target=esp32s3-box-3       examples/blinky1
+	@$(MD5SUM) test.bin
 
 	$(TINYGO) build -size short -o test.bin -target=makerfabs-esp32c3spi35 examples/machinetest
 	@$(MD5SUM) test.bin

src/machine/board_esp32s3-box3.go

@@ -0,0 +1,144 @@
+//go:build esp32s3_box3
+
+// This file contains the pin mappings for the ESP32-S3-BOX-3 board.
+//
+// ESP32-S3-BOX-3 is an AI voice development kit with 2.4" display.
+// - https://github.com/espressif/esp-box
+//
+// Based on ESP-BOX-3 BSP from Espressif.
+
+package machine
+
+// CPUFrequency returns the current CPU frequency for ESP32-S3-BOX-3.
+// Returns 240MHz (max speed for ESP32-S3 with PSRAM)
+func CPUFrequency() uint32 {
+	return 240_000_000 // 240MHz
+}
+
+const (
+	// GPIO pins available on ESP32-S3-BOX-3
+	// Based on ESP-BOX-3 BSP pin definitions
+	IO0  = GPIO0 // Button Config
+	IO1  = GPIO1 // Button Mute / Mute Status
+	IO2  = GPIO2 // I2S MCLK
+	IO3  = GPIO3 // LCD Touch Interrupt
+	IO4  = GPIO4 // LCD DC
+	IO5  = GPIO5 // LCD CS
+	IO6  = GPIO6 // LCD DATA0 (MOSI)
+	IO7  = GPIO7 // LCD PCLK (SCK)
+	IO8  = GPIO8 // I2C SDA
+	IO9  = GPIO9 // SD Card D0
+	IO10 = GPIO10
+	IO11 = GPIO11 // SD Card CLK
+	IO12 = GPIO12 // SD Card D3
+	IO13 = GPIO13 // SD Card D1
+	IO14 = GPIO14 // SD Card CMD
+	IO15 = GPIO15 // I2S DOUT (Speaker)
+	IO16 = GPIO16 // I2S DSIN (Microphone)
+	IO17 = GPIO17 // I2S SCLK
+	IO18 = GPIO18 // I2C SCL
+	IO19 = GPIO19 // USB_NEG
+	IO20 = GPIO20 // USB_POS
+	IO21 = GPIO21
+	IO38 = GPIO38
+	IO39 = GPIO39
+	IO40 = GPIO40 // I2C Dock SCL
+	IO41 = GPIO41 // I2C Dock SDA
+	IO42 = GPIO42 // SD Card D2
+	IO43 = GPIO43 // SD Card Power
+	IO44 = GPIO44 // (Unused)
+	IO45 = GPIO45 // I2S LCLK (LRCK)
+	IO46 = GPIO46 // Power Amp Control
+	IO47 = GPIO47 // LCD Backlight
+	IO48 = GPIO48 // LCD Reset
+)
+
+// SPI pins
+const (
+	// SPI1 - used for LCD
+	SPI1_SCK_PIN  = IO7   // LCD_PCLK
+	SPI1_MOSI_PIN = IO6   // LCD_DATA0 (MOSI)
+	SPI1_MISO_PIN = NoPin // Not used for LCD
+	SPI1_CS_PIN   = IO5   // LCD_CS
+
+	// SPI2 (not used on this board)
+	SPI2_SCK_PIN  = NoPin
+	SPI2_MOSI_PIN = NoPin
+	SPI2_MISO_PIN = NoPin
+	SPI2_CS_PIN   = NoPin
+)
+
+// LCD pins (ST7789/ILI9341)
+const (
+	LCD_SCK_PIN = SPI1_SCK_PIN
+	LCD_SDO_PIN = SPI1_MOSI_PIN
+	LCD_SDI_PIN = NoPin
+	LCD_SS_PIN  = SPI1_CS_PIN
+	LCD_DC_PIN  = IO4
+	LCD_RST_PIN = IO48
+	LCD_BL_PIN  = IO47
+)
+
+// I2C pins (Internal I2C for sensors)
+const (
+	SDA0_PIN = IO8
+	SCL0_PIN = IO18
+
+	SDA_PIN = SDA0_PIN
+	SCL_PIN = SCL0_PIN
+)
+
+// Dock I2C pins (for expansion dock)
+const (
+	SDA1_PIN = IO41
+	SCL1_PIN = IO40
+)
+
+// UART pins (USB CDC - native USB on ESP32-S3)
+// Note: Native USB doesn't require GPIO pins, these are kept for compatibility
+const (
+	UART_TX_PIN = NoPin
+	UART_RX_PIN = NoPin
+)
+
+// Built-in LED
+// Using LCD backlight as LED indicator
+const LED = GPIO47
+
+// Buttons
+const (
+	BUTTON_CONFIG = GPIO0
+	BUTTON_MUTE   = GPIO1
+)
+
+// Audio pins (I2S)
+const (
+	I2S_SCLK_PIN = IO17 // Bit Clock
+	I2S_MCLK_PIN = IO2  // Master Clock
+	I2S_LRCK_PIN = IO45 // Left/Right Clock (Frame Sync)
+	I2S_DOUT_PIN = IO15 // Data Out to Speaker (ES8311)
+	I2S_DSIN_PIN = IO16 // Data In from Microphone (ES7210)
+)
+
+// SD Card pins (SD/MMC mode)
+const (
+	SDCARD_CMD_PIN = IO14
+	SDCARD_CLK_PIN = IO11
+	SDCARD_D0_PIN  = IO9
+	SDCARD_D1_PIN  = IO13
+	SDCARD_D2_PIN  = IO42
+	SDCARD_D3_PIN  = IO12
+	SDCARD_PWR_PIN = IO43 // SD Card Power
+)
+
+// USB pins (native USB)
+const (
+	USB_DPPIN = IO20 // USB D+
+	USB_DMPIN = IO19 // USB D-
+)
+
+// Touch interrupt
+const TOUCH_INT_PIN = IO3
+
+// Power amplifier control
+const POWER_AMP_PIN = IO46

targets/esp32s3-box-3.json

@@ -0,0 +1,6 @@
+{
+  "inherits": ["esp32s3"],
+  "build-tags": ["esp32s3_box3"],
+  "serial-port": ["303a:1001"],
+  "flash-mode": "dio"
+}