Add configuration for SAM E54 Xplained

boards/same4_xplained/board.mk

@@ -0,0 +1,2 @@
+CHIP_FAMILY = samd51
+CHIP_VARIANT = SAME54P20A

boards/same4_xplained/board_config.h

@@ -0,0 +1,29 @@
+#ifndef BOARD_CONFIG_H
+#define BOARD_CONFIG_H
+
+#define VENDOR_NAME "Microchip"
+#define PRODUCT_NAME "SAME54 Xplained"
+#define VOLUME_LABEL "E54XBOOT"
+#define INDEX_URL "https://www.microchip.com/developmenttools/ProductDetails/atsame54-xpro"
+#define BOARD_ID "SAME54P20A-Xplained-v0"
+
+#define USB_VID 0x239A
+#define USB_PID 0x00B5
+
+#define LED_PIN PIN_PC18
+
+#define BOARD_NEOPIXEL_PIN PIN_PC24
+#define BOARD_NEOPIXEL_COUNT 0
+
+#define BOOT_USART_MODULE                 SERCOM0
+#define BOOT_USART_MASK                   APBAMASK
+#define BOOT_USART_BUS_CLOCK_INDEX        MCLK_APBAMASK_SERCOM0
+#define BOOT_USART_PAD_SETTINGS           UART_RX_PAD1_TX_PAD0
+#define BOOT_USART_PAD3                   PINMUX_UNUSED
+#define BOOT_USART_PAD2                   PINMUX_UNUSED
+#define BOOT_USART_PAD1                   PINMUX_PB25C_SERCOM0_PAD1
+#define BOOT_USART_PAD0                   PINMUX_PB24C_SERCOM0_PAD0
+#define BOOT_GCLK_ID_CORE                 SERCOM0_GCLK_ID_CORE
+#define BOOT_GCLK_ID_SLOW                 SERCOM0_GCLK_ID_SLOW
+
+#endif