diff --git a/Inc/board_config.h b/Inc/board_config.h
index 415a9cf..6cddb96 100644
--- a/Inc/board_config.h
+++ b/Inc/board_config.h
@@ -1,12 +1,12 @@
 #ifndef BOARD_CONFIG_H
 #define BOARD_CONFIG_H
 
-#ifndef DISABLE
-#define DISABLE 0
+#ifndef CFG_DISABLE
+#define CFG_DISABLE 0
 #endif
 
-#ifndef ENABLE
-#define ENABLE  1
+#ifndef CFG_ENABLE
+#define CFG_ENABLE  1
 #endif
 
 #define GD32E23XF4          0x10
@@ -19,25 +19,25 @@
 
 /* >>>>>>>>>>>>>>>>>>>>[IIC TYPE DEFINE]<<<<<<<<<<<<<<<<<<<< */
 
-#define SOFTWARE_IIC         DISABLE  // DISABLE: Hardware IIC; ENABLE: Software IIC
+#define SOFTWARE_IIC         CFG_DISABLE  // CFG_DISABLE: Hardware IIC; CFG_ENABLE: Software IIC
 
 /* >>>>>>>>>>>>>>>>>>>>[DEBUG MODE]<<<<<<<<<<<<<<<<<<<< */
 
-#define DEBUG_MODE           DISABLE  // DISABLE: Release Mode; ENABLE: Debug Mode
+#define DEBUG_MODE           CFG_DISABLE  // CFG_DISABLE: Release Mode; CFG_ENABLE: Debug Mode
 
 /* >>>>>>>>>>>>>>>>>>>>[COMMAND DEBUG]<<<<<<<<<<<<<<<<<<<< */
 
-#define COM_DEBUG            DISABLE  // DISABLE: Command debug off; ENABLE: Command debug on
+#define COM_DEBUG            CFG_DISABLE  // CFG_DISABLE: Command debug off; CFG_ENABLE: Command debug on
 
 /* >>>>>>>>>>>>>>>>>>>>[DEBUG ASSERTIONS DEFINE]<<<<<<<<<<<<<<<<<<<< */
 
-#define DEBUG_VERBOSE        DISABLE  // DISABLE: Verbose debug off; ENABLE: Verbose debug on
+#define DEBUG_VERBOSE        CFG_DISABLE  // CFG_DISABLE: Verbose debug off; CFG_ENABLE: Verbose debug on
 
 /* >>>>>>>>>>>>>>>>>>>>[SEGGER RTT DETECTION]<<<<<<<<<<<<<<<<<<<< */
 
-#define SEGGER_RTT_DETECTION ENABLE   // DISABLE: SEGGER RTT off; ENABLE: SEGGER RTT on
+#define SEGGER_RTT_DETECTION CFG_ENABLE   // CFG_DISABLE: SEGGER RTT off; CFG_ENABLE: SEGGER RTT on
 
-#if SEGGER_RTT_DETECTION == ENABLE
+#if SEGGER_RTT_DETECTION == CFG_ENABLE
   #include "SEGGER_RTT.h"
   #define RTT_printf(ch, ...)     SEGGER_RTT_printf(ch, __VA_ARGS__)
   #define RTT_WriteString(ch, s)  SEGGER_RTT_WriteString(ch, s)
@@ -48,6 +48,16 @@
   #define RTT_PutChar(ch, c)
 #endif
 
+/* >>>>>>>>>>>>>>>>>>>>[RS485 MODE]<<<<<<<<<<<<<<<<<<<< */
+
+#define RS485_MODE            CFG_DISABLE  // CFG_DISABLE: RS485 off; CFG_ENABLE: RS485 on
+
+#if RS485_MODE == CFG_ENABLE
+#define RS485_DE_RCU         RCU_GPIOA
+#define RS485_DE_PORT        GPIOA
+#define RS485_DE_PIN         GPIO_PIN_1   // 根据实际硬件修改 DE 引脚
+#endif
+
 /******************************************************************************/
 
 /* Dynamic USART Configuration Structure */
diff --git a/Inc/i2c.h b/Inc/i2c.h
index c3319d4..1e09da2 100644
--- a/Inc/i2c.h
+++ b/Inc/i2c.h
@@ -86,7 +86,7 @@ i2c_result_t i2c_bus_reset(void);
     \param[out] none
     \retval     none
 */
-#if DEBUG_VERBOSE == ENABLE
+#if DEBUG_VERBOSE == CFG_ENABLE
 void i2c_scan(void);
 #endif
 
@@ -141,7 +141,7 @@ i2c_result_t i2c_read(uint8_t slave_addr, uint8_t reg_addr, uint8_t *data, uint8
 */
 i2c_result_t i2c_read_raw(uint8_t slave_addr, uint8_t *data, uint8_t length);
 
-#if DEBUG_VERBOSE == ENABLE
+#if DEBUG_VERBOSE == CFG_ENABLE
 /*!
     \brief      get status string for debugging
     \param[in]  status: i2c_result_t value
diff --git a/Src/command.c b/Src/command.c
index ab423cf..c8ab702 100644
--- a/Src/command.c
+++ b/Src/command.c
@@ -101,7 +101,7 @@ void system_software_reset(void)
 }
 
 /* Debug output control */
-#if COM_DEBUG == ENABLE
+#if COM_DEBUG == CFG_ENABLE
     #include <stdio.h>
     #define COMMAND_DEBUG(fmt, ...) printf("[COMMAND] " fmt "\n", ##__VA_ARGS__)
 #else
@@ -565,7 +565,7 @@ void command_process(void) {
             // 到帧尾，进行各项校验
             bool verification_status = true;
 
-            #if DEBUG_VERBOSE == ENABLE
+            #if DEBUG_VERBOSE == CFG_ENABLE
             if (cmd_buf[0] != PROTOCOL_PACKAGE_HEADER) {
                 send_response(RESP_TYPE_HEADER_ERR, s_report_status_err, sizeof(s_report_status_err));
                 verification_status = false;
diff --git a/Src/gd32e23x_it.c b/Src/gd32e23x_it.c
index b7b49cc..e2c4b74 100644
--- a/Src/gd32e23x_it.c
+++ b/Src/gd32e23x_it.c
@@ -108,7 +108,7 @@ void USART0_IRQHandler(void) {
         g_usart_config.irq_handler();  // 通过函数指针调用对应的处理函数
     }
     // 作为调试口（第二串口）时也接收数据，便于模拟上位机命令
-#if DEBUG_MODE == ENABLE
+#if DEBUG_MODE == CFG_ENABLE
     else {
         usart0_irq_handler();
     }
diff --git a/Src/i2c.c b/Src/i2c.c
index 4dadd06..b3efc84 100644
--- a/Src/i2c.c
+++ b/Src/i2c.c
@@ -79,7 +79,7 @@ i2c_result_t i2c_bus_reset(void) {
     i2c_disable(I2C0);
     i2c_deinit(I2C0);
 
-#if DEBUG_VERBOSE == ENABLE
+#if DEBUG_VERBOSE == CFG_ENABLE
     printf("I2C bus reset\r\n");
 #endif
 
@@ -145,7 +145,7 @@ i2c_result_t i2c_bus_reset(void) {
  * 如果在某个地址上发现了设备，则会打印出该设备的地址。
  * 最后会打印出找到的设备总数。
  */
-#if DEBUG_VERBOSE == ENABLE
+#if DEBUG_VERBOSE == CFG_ENABLE
 void i2c_scan(void) {
     uint32_t timeout;
     uint8_t address;
@@ -262,7 +262,7 @@ static i2c_result_t _i2c_wait_flag_timeout(uint32_t flag)
     uint16_t timeout = 0;
     while(!i2c_flag_get(I2C0, flag)){
         if(timeout++ > I2C_TIME_OUT){
-#if DEBUG_VERBOSE == ENABLE
+#if DEBUG_VERBOSE == CFG_ENABLE
             const char* fname = "UNKNOWN";
             switch (flag) {
                 case I2C_FLAG_SBSEND: fname = "SBSEND"; break;
@@ -361,7 +361,7 @@ i2c_result_t i2c_write_16bits(uint8_t slave_addr, uint8_t reg_addr, uint8_t data
                 } else {
                     i2c_flag_clear(I2C0, I2C_FLAG_AERR);
                     timeout =0;
-#if DEBUG_VERBOSE == ENABLE
+#if DEBUG_VERBOSE == CFG_ENABLE
                     printf("IIC write failed for Error Slave Address. \n");
 #endif
                     return I2C_RESULT_NACK;
@@ -440,7 +440,7 @@ i2c_result_t i2c_write_16bits(uint8_t slave_addr, uint8_t reg_addr, uint8_t data
                 retry_count ++;
                 if (retry_count >= I2C_MAX_RETRY)
                 {
-#if DEBUG_VERBOSE == ENABLE
+#if DEBUG_VERBOSE == CFG_ENABLE
                     printf("IIC write failed after %d retries\n", I2C_MAX_RETRY);
 #endif
                     return I2C_RESULT_ERROR;
@@ -614,7 +614,7 @@ i2c_result_t i2c_read_16bits(uint8_t slave_addr, uint8_t reg_addr, uint8_t *data
 
                 retry_count++;
                 if (retry_count >= I2C_MAX_RETRY) {
-#if DEBUG_VERBOSE == ENABLE
+#if DEBUG_VERBOSE == CFG_ENABLE
                     printf("IIC read failed after %d retries\n", I2C_MAX_RETRY);
 #endif
                     return I2C_RESULT_ERROR;
@@ -654,7 +654,7 @@ i2c_result_t i2c_write(uint8_t slave_addr, uint8_t reg_addr, uint8_t *data, uint
 
     /* parameter validation */
     if (data == NULL || slave_addr > 0x7F || length == 0) {
-#if DEBUG_VERBOSE == ENABLE
+#if DEBUG_VERBOSE == CFG_ENABLE
         printf("I2C read invalid param: slave=0x%02X, len=%u, data=%p\r\n", slave_addr, length, data);
 #endif
         return I2C_RESULT_INVALID_PARAM;
@@ -714,7 +714,7 @@ i2c_result_t i2c_write(uint8_t slave_addr, uint8_t reg_addr, uint8_t *data, uint
                     i2c_flag_clear(I2C0, I2C_FLAG_AERR);
                     i2c_stop_on_bus(I2C0);
                     timeout = 0;
-#if DEBUG_VERBOSE == ENABLE
+#if DEBUG_VERBOSE == CFG_ENABLE
                     printf("I2C write failed for Error Slave Address. \n");
 #endif
                     return I2C_RESULT_NACK;
@@ -789,7 +789,7 @@ i2c_result_t i2c_write(uint8_t slave_addr, uint8_t reg_addr, uint8_t *data, uint
 
                 retry_count++;
                 if (retry_count >= I2C_MAX_RETRY) {
-#if DEBUG_VERBOSE == ENABLE
+#if DEBUG_VERBOSE == CFG_ENABLE
                     printf("IIC write failed after %d retries\n", I2C_MAX_RETRY);
 #endif
                     return I2C_RESULT_ERROR;
@@ -834,7 +834,7 @@ i2c_result_t i2c_read(uint8_t slave_addr, uint8_t reg_addr, uint8_t *data, uint8
     /* enable acknowledge */
     i2c_ack_config(I2C0, I2C_ACK_ENABLE);
 
-#if DEBUG_VERBOSE == ENABLE
+#if DEBUG_VERBOSE == CFG_ENABLE
     printf("I2C read start: slave=0x%02X reg=0x%02X len=%u\r\n", slave_addr, reg_addr, length);
 #endif
 
@@ -886,7 +886,7 @@ i2c_result_t i2c_read(uint8_t slave_addr, uint8_t reg_addr, uint8_t *data, uint8
                 }
 
                 /* debug: show address ack and error flags */
-#if DEBUG_VERBOSE == ENABLE
+#if DEBUG_VERBOSE == CFG_ENABLE
                 printf("I2C CLEAR_ADDRESS: write_phase=%d ADDSEND=%d AERR=%d\r\n",
                        (int)write_phase,
                        (int)i2c_flag_get(I2C0, I2C_FLAG_ADDSEND),
@@ -904,19 +904,19 @@ i2c_result_t i2c_read(uint8_t slave_addr, uint8_t reg_addr, uint8_t *data, uint8
                        - length > 2: keep ACK enabled and clear ADDR; we'll handle N-2/BTF sequence later */
                     if (length == 1) {
                         i2c_ack_config(I2C0, I2C_ACK_DISABLE);
-#if DEBUG_VERBOSE == ENABLE
+#if DEBUG_VERBOSE == CFG_ENABLE
                         printf("I2C READ phase: length=1, disabling ACK before clearing ADDSEND\r\n");
 #endif
                     } else if (length == 2) {
                         i2c_ackpos_config(I2C0, I2C_ACKPOS_NEXT);
                         i2c_ack_config(I2C0, I2C_ACK_DISABLE);
-#if DEBUG_VERBOSE == ENABLE
+#if DEBUG_VERBOSE == CFG_ENABLE
                         printf("I2C READ phase: length=2, set ACKPOS_NEXT and disabling ACK before clearing ADDSEND\r\n");
 #endif
                     } else {
                         /* length > 2: keep ACK enabled so slave will clock out data */
                         i2c_ack_config(I2C0, I2C_ACK_ENABLE);
-#if DEBUG_VERBOSE == ENABLE
+#if DEBUG_VERBOSE == CFG_ENABLE
                         printf("I2C READ phase: length=%u (>2), keeping ACK enabled\r\n", length);
 #endif
                     }
@@ -949,7 +949,7 @@ i2c_result_t i2c_read(uint8_t slave_addr, uint8_t reg_addr, uint8_t *data, uint8
                     break;
                 }
 
-#if DEBUG_VERBOSE == ENABLE
+#if DEBUG_VERBOSE == CFG_ENABLE
                 printf("I2C RESTART: after BTC, delay 5ms and issuing repeated START\r\n");
 #endif
                 /* small delay to allow slave device to prepare multi-byte data before repeated start */
@@ -972,13 +972,13 @@ i2c_result_t i2c_read(uint8_t slave_addr, uint8_t reg_addr, uint8_t *data, uint8
                 write_phase = false;
                 state = I2C_STATE_CLEAR_ADDRESS;
                 timeout = 0;
-#if DEBUG_VERBOSE == ENABLE
+#if DEBUG_VERBOSE == CFG_ENABLE
                 printf("I2C addressing sent for read (slave=0x%02X)\r\n", slave_addr);
 #endif
                 break;
 
             case I2C_STATE_RECEIVE_DATA:
-#if DEBUG_VERBOSE == ENABLE
+#if DEBUG_VERBOSE == CFG_ENABLE
                 printf("I2C RECEIVE_DATA: expecting %u bytes\r\n", length);
 #endif
                 if (length == 1) {
@@ -1060,7 +1060,7 @@ i2c_result_t i2c_read(uint8_t slave_addr, uint8_t reg_addr, uint8_t *data, uint8
 
             case I2C_STATE_ERROR:
                 /* I2C bus error, try to reset the bus and retry */
-#if DEBUG_VERBOSE == ENABLE
+#if DEBUG_VERBOSE == CFG_ENABLE
                 printf("I2C_STATE_ERROR: resetting bus and retrying (retry_count=%u)\r\n", retry_count);
 #endif
                 i2c_bus_reset();
@@ -1071,7 +1071,7 @@ i2c_result_t i2c_read(uint8_t slave_addr, uint8_t reg_addr, uint8_t *data, uint8
 
                 retry_count++;
                 if (retry_count >= I2C_MAX_RETRY) {
-#if DEBUG_VERBOSE == ENABLE
+#if DEBUG_VERBOSE == CFG_ENABLE
                     /* Print diagnostic flags to help root-cause analysis */
                     printf("I2C read final failure after %d retries, last_state=%d\r\n", I2C_MAX_RETRY, state);
                     printf("  FLAGS: AERR=%d BERR=%d LOSTARB=%d I2CBSY=%d\r\n",
@@ -1080,7 +1080,7 @@ i2c_result_t i2c_read(uint8_t slave_addr, uint8_t reg_addr, uint8_t *data, uint8
                            (int)i2c_flag_get(I2C0, I2C_FLAG_LOSTARB),
                            (int)i2c_flag_get(I2C0, I2C_FLAG_I2CBSY));
 #endif
-#if DEBUG_VERBOSE == ENABLE
+#if DEBUG_VERBOSE == CFG_ENABLE
                     printf("I2C read failed after %d retries\n", I2C_MAX_RETRY);
 #endif
                     return I2C_RESULT_ERROR;
@@ -1101,7 +1101,7 @@ i2c_result_t i2c_read(uint8_t slave_addr, uint8_t reg_addr, uint8_t *data, uint8
         }
     }
     /* timeout path: provide debug info */
-#if DEBUG_VERBOSE == ENABLE
+#if DEBUG_VERBOSE == CFG_ENABLE
     printf("I2C read timeout (end state). slave=0x%02X, len=%u\r\n", slave_addr, length);
     printf("  FLAGS: AERR=%d BERR=%d LOSTARB=%d I2CBSY=%d\r\n",
            (int)i2c_flag_get(I2C0, I2C_FLAG_AERR),
@@ -1269,7 +1269,7 @@ i2c_result_t i2c_read_raw(uint8_t slave_addr, uint8_t *data, uint8_t length)
     return I2C_RESULT_TIMEOUT;
 }
 
-#if DEBUG_VERBOSE == ENABLE
+#if DEBUG_VERBOSE == CFG_ENABLE
 /*!
     \brief      get status string for debugging
     \param[in]  status: i2c_status_t value
diff --git a/Src/main.c b/Src/main.c
index 9bc9432..8ef3410 100644
--- a/Src/main.c
+++ b/Src/main.c
@@ -62,15 +62,15 @@ int main(void)
 
     i2c_config();
 
-#if DEBUG_MODE == ENABLE
+#if DEBUG_MODE == CFG_ENABLE
     printf("Hello World!\r\n");
 #endif
 
-#if SEGGER_RTT_DETECTION == ENABLE
+#if SEGGER_RTT_DETECTION == CFG_ENABLE
     RTT_printf(0, "Hello World!\r\n");
 #endif
 
-#if DEBUG_VERBOSE == ENABLE
+#if DEBUG_VERBOSE == CFG_ENABLE
     i2c_scan();
 
     i2c_bus_reset();
diff --git a/Src/uart.c b/Src/uart.c
index 347f0a8..d3ce37e 100644
--- a/Src/uart.c
+++ b/Src/uart.c
@@ -17,6 +17,14 @@ void uart_init(void) {
     gpio_mode_set(UART_GPIO_PORT, GPIO_MODE_AF, GPIO_PUPD_PULLUP, UART_TX_PIN | UART_RX_PIN);
     gpio_output_options_set(UART_GPIO_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, UART_TX_PIN | UART_RX_PIN);
 
+#if RS485_MODE == CFG_ENABLE
+    /* 配置 RS485 DE 引脚 */
+    rcu_periph_clock_enable(RS485_DE_RCU);
+    gpio_af_set(RS485_DE_PORT, GPIO_AF_1, RS485_DE_PIN);
+    gpio_mode_set(RS485_DE_PORT, GPIO_MODE_AF, GPIO_PUPD_NONE, RS485_DE_PIN);
+    gpio_output_options_set(RS485_DE_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, RS485_DE_PIN);
+#endif
+
     /* 配置波特率、数据位、停止位等 */
     usart_deinit(UART_PHY);
     usart_word_length_set(UART_PHY, USART_WL_8BIT);
@@ -26,6 +34,13 @@ void uart_init(void) {
     usart_receive_config(UART_PHY, USART_RECEIVE_ENABLE);
     usart_transmit_config(UART_PHY, USART_TRANSMIT_ENABLE);
 
+#if RS485_MODE == CFG_ENABLE
+    // 配置 RS485 模式
+    usart_rs485_driver_enable(UART_PHY);
+    usart_driver_assertime_config(UART_PHY, 10);
+    usart_driver_deassertime_config(UART_PHY, 10);
+
+#endif
     usart_enable(UART_PHY);
 
     nvic_irq_enable(UART_IRQ, 0);