diff --git a/app/by_frame.c b/app/by_frame.c
index 1b09187..789968d 100644
--- a/app/by_frame.c
+++ b/app/by_frame.c
@@ -25,13 +25,14 @@ void by_frame_send(uint8_t data_num, uint32_t *data_array)
     frame_buffer[0]  = BY_FRAME_HEAD_1;
     frame_buffer[1]  = BY_FRAME_HEAD_2;
 
-    memcpy(frame_buffer + 2, data_array, data_num * sizeof(uint32_t));
+    memcpy(&frame_buffer[2], data_array, data_num * sizeof(uint32_t));
     crc_cal = crc16_check(frame_buffer, 2 + data_num * sizeof(uint32_t));
 
     frame_buffer[2 + data_num * sizeof(uint32_t)] = (uint8_t)(crc_cal >> 8);
     frame_buffer[3 + data_num * sizeof(uint32_t)] = (uint8_t)(crc_cal);
 
     uart_write_buffer(BY_FRAME_UART_INDEX, frame_buffer, 4 + data_num * sizeof(uint32_t));
+    system_delay_us(BY_FRAME_UART_IDLE_TIME_US);
 }
 
 void by_frame_parse(uint8_t data_num, uint32_t *data_array)
diff --git a/app/by_frame.h b/app/by_frame.h
index 29a555c..6b1ce45 100644
--- a/app/by_frame.h
+++ b/app/by_frame.h
@@ -8,13 +8,15 @@
 
 #include <stdint.h>
 
-#define BY_FRAME_HEAD_1      (0XEB)
-#define BY_FRAME_HEAD_2      (0x90)
+#define BY_FRAME_HEAD_1            (0XEB)
+#define BY_FRAME_HEAD_2            (0x90)
 
-#define BY_FRAME_UART_TX_PIN (UART2_MAP0_TX_A2)
-#define BY_FRAME_UART_RX_PIN (UART2_MAP0_RX_A3)
-#define BY_FRAME_UART_INDEX  (UART_2)
-#define BY_FRAME_UART_BAUDRATE  (115200)
+#define BY_FRAME_UART_TX_PIN       (UART2_MAP0_TX_A2)
+#define BY_FRAME_UART_RX_PIN       (UART2_MAP0_RX_A3)
+#define BY_FRAME_UART_INDEX        (UART_2)
+#define BY_FRAME_UART_BAUDRATE     (115200)
+
+#define BY_FRAME_UART_IDLE_TIME_US ((1000000 / BY_FRAME_UART_BAUDRATE * 8) * 4)
 
 extern void by_frame_init(void);
 extern void by_frame_send(uint8_t data_num, uint32_t *data_array);