diff --git a/bsp/microchip/common/board/serial.c b/bsp/microchip/common/board/serial.c
index 9878bc468a..a170950d5e 100644
--- a/bsp/microchip/common/board/serial.c
+++ b/bsp/microchip/common/board/serial.c
@@ -12,10 +12,205 @@
 #include <rtdevice.h>
 
 #include <atmel_start.h>
+#include <board.h>
 
 /* SAM MCU serial device */
 static struct rt_serial_device sam_serial;
 
+#ifdef SOC_SAMD51
+
+/**
+ * @brief Configure serial port
+ *
+ * This function will configure UART baudrate, parity and so on.
+ *
+ * @return RT_EOK.
+ */
+static rt_err_t serial_configure(struct rt_serial_device *serial, struct serial_configure *cfg)
+{
+    struct usart_sync_descriptor* desc;
+
+    RT_ASSERT(serial != RT_NULL);
+
+    desc = (struct usart_sync_descriptor *)serial->parent.user_data;
+
+    RT_ASSERT(desc != RT_NULL);
+    RT_ASSERT(cfg  != RT_NULL);
+
+    usart_sync_disable(desc);
+
+    /* Set baudrate */
+    usart_sync_set_baud_rate(desc, (const uint32_t)cfg->baud_rate);
+
+    /* Set stop bit */
+    if (cfg->stop_bits == STOP_BITS_1)
+        usart_sync_set_stopbits(desc, USART_STOP_BITS_ONE);
+    else if (cfg->stop_bits == STOP_BITS_2)
+        usart_sync_set_stopbits(desc, USART_STOP_BITS_TWO);
+
+    if (cfg->bit_order == BIT_ORDER_LSB)
+        usart_sync_set_data_order(desc, USART_DATA_ORDER_LSB);
+    else if (cfg->bit_order == BIT_ORDER_MSB)
+        usart_sync_set_data_order(desc, USART_DATA_ORDER_MSB);
+
+    /* Set character size */
+    switch (cfg->data_bits)
+    {
+        case DATA_BITS_5:
+            usart_sync_set_character_size(desc, USART_CHARACTER_SIZE_5BITS);
+            break;
+        case DATA_BITS_6:
+            usart_sync_set_character_size(desc, USART_CHARACTER_SIZE_6BITS);
+            break;
+        case DATA_BITS_7:
+            usart_sync_set_character_size(desc, USART_CHARACTER_SIZE_7BITS);
+            break;
+        case DATA_BITS_8:
+            usart_sync_set_character_size(desc, USART_CHARACTER_SIZE_8BITS);
+            break;
+        case DATA_BITS_9:
+            usart_sync_set_character_size(desc, USART_CHARACTER_SIZE_9BITS);
+            break;
+        default:
+            break;
+    }
+
+    if (cfg->parity == PARITY_NONE)
+        usart_sync_set_parity(desc, USART_PARITY_NONE);
+    else if (cfg->parity == PARITY_ODD)
+        usart_sync_set_parity(desc, USART_PARITY_ODD);
+    else if (cfg->parity == PARITY_EVEN)
+        usart_sync_set_parity(desc, USART_PARITY_EVEN);
+
+    usart_sync_enable(desc);
+
+    return RT_EOK;
+}
+
+/**
+ * @brief Control serial port
+ *
+ * This function provide UART enable/disable control.
+ *
+ * @return RT_EOK.
+ */
+static rt_err_t serial_control(struct rt_serial_device *serial, int cmd, void *arg)
+{
+    struct usart_sync_descriptor* desc;
+
+    RT_ASSERT(serial != RT_NULL);
+    desc = (struct usart_sync_descriptor *)serial->parent.user_data;
+
+    RT_ASSERT(desc != RT_NULL);
+
+    switch (cmd)
+    {
+        /* disable interrupt */
+        case RT_DEVICE_CTRL_CLR_INT:
+            usart_sync_disable(desc);
+            break;
+        /* enable interrupt */
+        case RT_DEVICE_CTRL_SET_INT:
+            usart_sync_enable(desc);
+            break;
+        /* UART config */
+        case RT_DEVICE_CTRL_CONFIG: // RT_SERIAL_RX_NON_BLOCKING or RT_SERIAL_RX_BLOCKING
+                                    // RT_SERIAL_TX_NON_BLOCKING or RT_SERIAL_TX_BLOCKING
+            break;
+#ifdef RT_USING_SERIAL_V2
+        case RT_DEVICE_CHECK_OPTMODE:
+            break;
+#endif
+        default:
+            break;
+    }
+
+    return RT_EOK;
+}
+
+/**
+ * @brief Serial sends a char
+ *
+ * This function will send a char to the UART
+ *
+ * @return 1.
+ */
+static int serial_putc(struct rt_serial_device *serial, char c)
+{
+    struct usart_sync_descriptor* desc;
+
+    RT_ASSERT(serial != RT_NULL);
+    desc = (struct usart_sync_descriptor *)serial->parent.user_data;
+
+    RT_ASSERT(desc != RT_NULL);
+
+    while (usart_sync_is_tx_empty(desc) == 0);
+    _usart_sync_write_byte(&TARGET_IO.device, (uint8_t)c);
+
+    return 1;
+}
+
+/**
+ * @brief Serial gets a char
+ *
+ * This function will get a char from the UART
+ *
+ * @return received char character or -1 if no char received.
+ */
+static int serial_getc(struct rt_serial_device *serial)
+{
+    char c;
+    int ch;
+    struct usart_sync_descriptor* desc;
+
+    RT_ASSERT(serial != RT_NULL);
+    desc = (struct usart_sync_descriptor *)serial->parent.user_data;
+
+    RT_ASSERT(desc != RT_NULL);
+
+    ch = -1;
+    if (usart_sync_is_rx_not_empty(desc))
+    {
+        io_read(&desc->io, (uint8_t *)&c, 1);
+        ch = c & 0xff;
+    }
+
+    return ch;
+}
+
+static const struct rt_uart_ops sam_serial_ops =
+{
+    serial_configure,
+    serial_control,
+    serial_putc,
+    serial_getc,
+};
+
+/**
+ * @brief Initialize the UART
+ *
+ * This function initialize the UART
+ *
+ * @return None.
+ */
+int rt_hw_uart_init(void)
+{
+    struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
+    config.baud_rate = DEFAULT_USART_BAUD_RATE;
+
+    sam_serial.ops       = &sam_serial_ops;
+    sam_serial.config    = config;
+    sam_serial.serial_rx = RT_NULL;
+    sam_serial.serial_rx = RT_NULL;
+    rt_hw_serial_register(&sam_serial, RT_CONSOLE_DEVICE_NAME,
+                          RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX |
+                          RT_DEVICE_FLAG_INT_TX, (void *)&TARGET_IO);
+
+    return 0;
+}
+
+#else
+
 static void serial_rxcallback(const struct usart_async_descriptor *const io_descr)
 {
     (void)io_descr;
@@ -229,4 +424,6 @@ int rt_hw_uart_init(void)
     return 0;
 }
 
+#endif
+
 /*@}*/
diff --git a/bsp/microchip/samd51-adafruit-metro-m4/board/board.h b/bsp/microchip/samd51-adafruit-metro-m4/board/board.h
index 6cff3ff8e5..a81ca418dc 100644
--- a/bsp/microchip/samd51-adafruit-metro-m4/board/board.h
+++ b/bsp/microchip/samd51-adafruit-metro-m4/board/board.h
@@ -73,6 +73,11 @@ extern int __bss_end;
 #define HEAP_END      SAME5x_SRAM_END
 #endif
 
+#ifdef RT_USING_SERIAL
+#include "hpl_sercom_config.h"
+#define DEFAULT_USART_BAUD_RATE CONF_SERCOM_3_USART_BAUD_RATE
+#endif
+
 void rt_hw_board_init(void);
 
 #endif