diff --git a/Example/ADC_Demo/Libraries/doc/version.txt b/Example/ADC_Demo/Libraries/doc/version.txt
index 11ab82e..9d395a4 100644
--- a/Example/ADC_Demo/Libraries/doc/version.txt
+++ b/Example/ADC_Demo/Libraries/doc/version.txt
@@ -1,3 +1,6 @@
+V1.2.1
+    解决printf关闭的时候，编译报错的问题
+
 V1.2.0
     增加CH9141蓝牙转串口模块的驱动
     添加无线类型的枚举变量
diff --git a/Example/ADC_Demo/Libraries/seekfree_libraries/zf_uart.c b/Example/ADC_Demo/Libraries/seekfree_libraries/zf_uart.c
index 0e0162e..271b5b0 100644
--- a/Example/ADC_Demo/Libraries/seekfree_libraries/zf_uart.c
+++ b/Example/ADC_Demo/Libraries/seekfree_libraries/zf_uart.c
@@ -351,6 +351,7 @@ uint8 uart_query(UARTN_enum uartn, uint8 *dat)
     return 0;
 }
 
+#if(1 == PRINTF_ENABLE)
 //-------------------------------------------------------------------------------------------------------------------
 //  @brief      重定义printf 到串口
 //  @param      ch      需要打印的字节
@@ -362,4 +363,5 @@ int fputc(int ch, FILE *stream)
     uart_putchar(DEBUG_UART, (char)ch);
     return(ch);
 }
+#endif
 
diff --git a/Example/ADC_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h b/Example/ADC_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
index 2961771..b5559e4 100644
--- a/Example/ADC_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
+++ b/Example/ADC_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
@@ -78,6 +78,7 @@ typedef enum
 
 extern uint8 uart_flag;
 extern uint8 uart_data;
+extern uint8 mac_address[17];      //本机mac地址
 
 void bluetooth_ch9141_uart_callback(void);
 void bluetooth_ch9141_enter_at_mode(void);
diff --git a/Example/Cpu1_Handles_Interrupts_Demo/Libraries/doc/version.txt b/Example/Cpu1_Handles_Interrupts_Demo/Libraries/doc/version.txt
index 11ab82e..9d395a4 100644
--- a/Example/Cpu1_Handles_Interrupts_Demo/Libraries/doc/version.txt
+++ b/Example/Cpu1_Handles_Interrupts_Demo/Libraries/doc/version.txt
@@ -1,3 +1,6 @@
+V1.2.1
+    解决printf关闭的时候，编译报错的问题
+
 V1.2.0
     增加CH9141蓝牙转串口模块的驱动
     添加无线类型的枚举变量
diff --git a/Example/Cpu1_Handles_Interrupts_Demo/Libraries/seekfree_libraries/zf_uart.c b/Example/Cpu1_Handles_Interrupts_Demo/Libraries/seekfree_libraries/zf_uart.c
index 0e0162e..271b5b0 100644
--- a/Example/Cpu1_Handles_Interrupts_Demo/Libraries/seekfree_libraries/zf_uart.c
+++ b/Example/Cpu1_Handles_Interrupts_Demo/Libraries/seekfree_libraries/zf_uart.c
@@ -351,6 +351,7 @@ uint8 uart_query(UARTN_enum uartn, uint8 *dat)
     return 0;
 }
 
+#if(1 == PRINTF_ENABLE)
 //-------------------------------------------------------------------------------------------------------------------
 //  @brief      重定义printf 到串口
 //  @param      ch      需要打印的字节
@@ -362,4 +363,5 @@ int fputc(int ch, FILE *stream)
     uart_putchar(DEBUG_UART, (char)ch);
     return(ch);
 }
+#endif
 
diff --git a/Example/Cpu1_Handles_Interrupts_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h b/Example/Cpu1_Handles_Interrupts_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
index 2961771..b5559e4 100644
--- a/Example/Cpu1_Handles_Interrupts_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
+++ b/Example/Cpu1_Handles_Interrupts_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
@@ -78,6 +78,7 @@ typedef enum
 
 extern uint8 uart_flag;
 extern uint8 uart_data;
+extern uint8 mac_address[17];      //本机mac地址
 
 void bluetooth_ch9141_uart_callback(void);
 void bluetooth_ch9141_enter_at_mode(void);
diff --git a/Example/Dual_Core_Demo/Libraries/doc/version.txt b/Example/Dual_Core_Demo/Libraries/doc/version.txt
index 11ab82e..9d395a4 100644
--- a/Example/Dual_Core_Demo/Libraries/doc/version.txt
+++ b/Example/Dual_Core_Demo/Libraries/doc/version.txt
@@ -1,3 +1,6 @@
+V1.2.1
+    解决printf关闭的时候，编译报错的问题
+
 V1.2.0
     增加CH9141蓝牙转串口模块的驱动
     添加无线类型的枚举变量
diff --git a/Example/Dual_Core_Demo/Libraries/seekfree_libraries/zf_uart.c b/Example/Dual_Core_Demo/Libraries/seekfree_libraries/zf_uart.c
index 0e0162e..271b5b0 100644
--- a/Example/Dual_Core_Demo/Libraries/seekfree_libraries/zf_uart.c
+++ b/Example/Dual_Core_Demo/Libraries/seekfree_libraries/zf_uart.c
@@ -351,6 +351,7 @@ uint8 uart_query(UARTN_enum uartn, uint8 *dat)
     return 0;
 }
 
+#if(1 == PRINTF_ENABLE)
 //-------------------------------------------------------------------------------------------------------------------
 //  @brief      重定义printf 到串口
 //  @param      ch      需要打印的字节
@@ -362,4 +363,5 @@ int fputc(int ch, FILE *stream)
     uart_putchar(DEBUG_UART, (char)ch);
     return(ch);
 }
+#endif
 
diff --git a/Example/Dual_Core_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h b/Example/Dual_Core_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
index 2961771..b5559e4 100644
--- a/Example/Dual_Core_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
+++ b/Example/Dual_Core_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
@@ -78,6 +78,7 @@ typedef enum
 
 extern uint8 uart_flag;
 extern uint8 uart_data;
+extern uint8 mac_address[17];      //本机mac地址
 
 void bluetooth_ch9141_uart_callback(void);
 void bluetooth_ch9141_enter_at_mode(void);
diff --git a/Example/EEPROM_Demo/Libraries/doc/version.txt b/Example/EEPROM_Demo/Libraries/doc/version.txt
index 11ab82e..9d395a4 100644
--- a/Example/EEPROM_Demo/Libraries/doc/version.txt
+++ b/Example/EEPROM_Demo/Libraries/doc/version.txt
@@ -1,3 +1,6 @@
+V1.2.1
+    解决printf关闭的时候，编译报错的问题
+
 V1.2.0
     增加CH9141蓝牙转串口模块的驱动
     添加无线类型的枚举变量
diff --git a/Example/EEPROM_Demo/Libraries/seekfree_libraries/zf_uart.c b/Example/EEPROM_Demo/Libraries/seekfree_libraries/zf_uart.c
index 0e0162e..271b5b0 100644
--- a/Example/EEPROM_Demo/Libraries/seekfree_libraries/zf_uart.c
+++ b/Example/EEPROM_Demo/Libraries/seekfree_libraries/zf_uart.c
@@ -351,6 +351,7 @@ uint8 uart_query(UARTN_enum uartn, uint8 *dat)
     return 0;
 }
 
+#if(1 == PRINTF_ENABLE)
 //-------------------------------------------------------------------------------------------------------------------
 //  @brief      重定义printf 到串口
 //  @param      ch      需要打印的字节
@@ -362,4 +363,5 @@ int fputc(int ch, FILE *stream)
     uart_putchar(DEBUG_UART, (char)ch);
     return(ch);
 }
+#endif
 
diff --git a/Example/EEPROM_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h b/Example/EEPROM_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
index 2961771..b5559e4 100644
--- a/Example/EEPROM_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
+++ b/Example/EEPROM_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
@@ -78,6 +78,7 @@ typedef enum
 
 extern uint8 uart_flag;
 extern uint8 uart_data;
+extern uint8 mac_address[17];      //本机mac地址
 
 void bluetooth_ch9141_uart_callback(void);
 void bluetooth_ch9141_enter_at_mode(void);
diff --git a/Example/Encoder_Demo/Libraries/doc/version.txt b/Example/Encoder_Demo/Libraries/doc/version.txt
index 11ab82e..9d395a4 100644
--- a/Example/Encoder_Demo/Libraries/doc/version.txt
+++ b/Example/Encoder_Demo/Libraries/doc/version.txt
@@ -1,3 +1,6 @@
+V1.2.1
+    解决printf关闭的时候，编译报错的问题
+
 V1.2.0
     增加CH9141蓝牙转串口模块的驱动
     添加无线类型的枚举变量
diff --git a/Example/Encoder_Demo/Libraries/seekfree_libraries/zf_uart.c b/Example/Encoder_Demo/Libraries/seekfree_libraries/zf_uart.c
index 0e0162e..271b5b0 100644
--- a/Example/Encoder_Demo/Libraries/seekfree_libraries/zf_uart.c
+++ b/Example/Encoder_Demo/Libraries/seekfree_libraries/zf_uart.c
@@ -351,6 +351,7 @@ uint8 uart_query(UARTN_enum uartn, uint8 *dat)
     return 0;
 }
 
+#if(1 == PRINTF_ENABLE)
 //-------------------------------------------------------------------------------------------------------------------
 //  @brief      重定义printf 到串口
 //  @param      ch      需要打印的字节
@@ -362,4 +363,5 @@ int fputc(int ch, FILE *stream)
     uart_putchar(DEBUG_UART, (char)ch);
     return(ch);
 }
+#endif
 
diff --git a/Example/Encoder_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h b/Example/Encoder_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
index 2961771..b5559e4 100644
--- a/Example/Encoder_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
+++ b/Example/Encoder_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
@@ -78,6 +78,7 @@ typedef enum
 
 extern uint8 uart_flag;
 extern uint8 uart_data;
+extern uint8 mac_address[17];      //本机mac地址
 
 void bluetooth_ch9141_uart_callback(void);
 void bluetooth_ch9141_enter_at_mode(void);
diff --git a/Example/FFT_Demo/Libraries/doc/version.txt b/Example/FFT_Demo/Libraries/doc/version.txt
index 11ab82e..9d395a4 100644
--- a/Example/FFT_Demo/Libraries/doc/version.txt
+++ b/Example/FFT_Demo/Libraries/doc/version.txt
@@ -1,3 +1,6 @@
+V1.2.1
+    解决printf关闭的时候，编译报错的问题
+
 V1.2.0
     增加CH9141蓝牙转串口模块的驱动
     添加无线类型的枚举变量
diff --git a/Example/FFT_Demo/Libraries/seekfree_libraries/zf_uart.c b/Example/FFT_Demo/Libraries/seekfree_libraries/zf_uart.c
index 0e0162e..271b5b0 100644
--- a/Example/FFT_Demo/Libraries/seekfree_libraries/zf_uart.c
+++ b/Example/FFT_Demo/Libraries/seekfree_libraries/zf_uart.c
@@ -351,6 +351,7 @@ uint8 uart_query(UARTN_enum uartn, uint8 *dat)
     return 0;
 }
 
+#if(1 == PRINTF_ENABLE)
 //-------------------------------------------------------------------------------------------------------------------
 //  @brief      重定义printf 到串口
 //  @param      ch      需要打印的字节
@@ -362,4 +363,5 @@ int fputc(int ch, FILE *stream)
     uart_putchar(DEBUG_UART, (char)ch);
     return(ch);
 }
+#endif
 
diff --git a/Example/FFT_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h b/Example/FFT_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
index 2961771..b5559e4 100644
--- a/Example/FFT_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
+++ b/Example/FFT_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
@@ -78,6 +78,7 @@ typedef enum
 
 extern uint8 uart_flag;
 extern uint8 uart_data;
+extern uint8 mac_address[17];      //本机mac地址
 
 void bluetooth_ch9141_uart_callback(void);
 void bluetooth_ch9141_enter_at_mode(void);
diff --git a/Example/GPIO_Interrupt_Demo/Libraries/doc/version.txt b/Example/GPIO_Interrupt_Demo/Libraries/doc/version.txt
index 11ab82e..9d395a4 100644
--- a/Example/GPIO_Interrupt_Demo/Libraries/doc/version.txt
+++ b/Example/GPIO_Interrupt_Demo/Libraries/doc/version.txt
@@ -1,3 +1,6 @@
+V1.2.1
+    解决printf关闭的时候，编译报错的问题
+
 V1.2.0
     增加CH9141蓝牙转串口模块的驱动
     添加无线类型的枚举变量
diff --git a/Example/GPIO_Interrupt_Demo/Libraries/seekfree_libraries/zf_uart.c b/Example/GPIO_Interrupt_Demo/Libraries/seekfree_libraries/zf_uart.c
index 0e0162e..271b5b0 100644
--- a/Example/GPIO_Interrupt_Demo/Libraries/seekfree_libraries/zf_uart.c
+++ b/Example/GPIO_Interrupt_Demo/Libraries/seekfree_libraries/zf_uart.c
@@ -351,6 +351,7 @@ uint8 uart_query(UARTN_enum uartn, uint8 *dat)
     return 0;
 }
 
+#if(1 == PRINTF_ENABLE)
 //-------------------------------------------------------------------------------------------------------------------
 //  @brief      重定义printf 到串口
 //  @param      ch      需要打印的字节
@@ -362,4 +363,5 @@ int fputc(int ch, FILE *stream)
     uart_putchar(DEBUG_UART, (char)ch);
     return(ch);
 }
+#endif
 
diff --git a/Example/GPIO_Interrupt_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h b/Example/GPIO_Interrupt_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
index 2961771..b5559e4 100644
--- a/Example/GPIO_Interrupt_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
+++ b/Example/GPIO_Interrupt_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
@@ -78,6 +78,7 @@ typedef enum
 
 extern uint8 uart_flag;
 extern uint8 uart_data;
+extern uint8 mac_address[17];      //本机mac地址
 
 void bluetooth_ch9141_uart_callback(void);
 void bluetooth_ch9141_enter_at_mode(void);
diff --git a/Example/Interrupt_Priority_Set_Demo/Libraries/doc/version.txt b/Example/Interrupt_Priority_Set_Demo/Libraries/doc/version.txt
index 11ab82e..9d395a4 100644
--- a/Example/Interrupt_Priority_Set_Demo/Libraries/doc/version.txt
+++ b/Example/Interrupt_Priority_Set_Demo/Libraries/doc/version.txt
@@ -1,3 +1,6 @@
+V1.2.1
+    解决printf关闭的时候，编译报错的问题
+
 V1.2.0
     增加CH9141蓝牙转串口模块的驱动
     添加无线类型的枚举变量
diff --git a/Example/Interrupt_Priority_Set_Demo/Libraries/seekfree_libraries/zf_uart.c b/Example/Interrupt_Priority_Set_Demo/Libraries/seekfree_libraries/zf_uart.c
index 0e0162e..271b5b0 100644
--- a/Example/Interrupt_Priority_Set_Demo/Libraries/seekfree_libraries/zf_uart.c
+++ b/Example/Interrupt_Priority_Set_Demo/Libraries/seekfree_libraries/zf_uart.c
@@ -351,6 +351,7 @@ uint8 uart_query(UARTN_enum uartn, uint8 *dat)
     return 0;
 }
 
+#if(1 == PRINTF_ENABLE)
 //-------------------------------------------------------------------------------------------------------------------
 //  @brief      重定义printf 到串口
 //  @param      ch      需要打印的字节
@@ -362,4 +363,5 @@ int fputc(int ch, FILE *stream)
     uart_putchar(DEBUG_UART, (char)ch);
     return(ch);
 }
+#endif
 
diff --git a/Example/Interrupt_Priority_Set_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h b/Example/Interrupt_Priority_Set_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
index 2961771..b5559e4 100644
--- a/Example/Interrupt_Priority_Set_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
+++ b/Example/Interrupt_Priority_Set_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
@@ -78,6 +78,7 @@ typedef enum
 
 extern uint8 uart_flag;
 extern uint8 uart_data;
+extern uint8 mac_address[17];      //本机mac地址
 
 void bluetooth_ch9141_uart_callback(void);
 void bluetooth_ch9141_enter_at_mode(void);
diff --git a/Example/LED_Blink_Demo/Libraries/doc/version.txt b/Example/LED_Blink_Demo/Libraries/doc/version.txt
index 11ab82e..9d395a4 100644
--- a/Example/LED_Blink_Demo/Libraries/doc/version.txt
+++ b/Example/LED_Blink_Demo/Libraries/doc/version.txt
@@ -1,3 +1,6 @@
+V1.2.1
+    解决printf关闭的时候，编译报错的问题
+
 V1.2.0
     增加CH9141蓝牙转串口模块的驱动
     添加无线类型的枚举变量
diff --git a/Example/LED_Blink_Demo/Libraries/seekfree_libraries/zf_uart.c b/Example/LED_Blink_Demo/Libraries/seekfree_libraries/zf_uart.c
index 0e0162e..271b5b0 100644
--- a/Example/LED_Blink_Demo/Libraries/seekfree_libraries/zf_uart.c
+++ b/Example/LED_Blink_Demo/Libraries/seekfree_libraries/zf_uart.c
@@ -351,6 +351,7 @@ uint8 uart_query(UARTN_enum uartn, uint8 *dat)
     return 0;
 }
 
+#if(1 == PRINTF_ENABLE)
 //-------------------------------------------------------------------------------------------------------------------
 //  @brief      重定义printf 到串口
 //  @param      ch      需要打印的字节
@@ -362,4 +363,5 @@ int fputc(int ch, FILE *stream)
     uart_putchar(DEBUG_UART, (char)ch);
     return(ch);
 }
+#endif
 
diff --git a/Example/LED_Blink_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h b/Example/LED_Blink_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
index 2961771..b5559e4 100644
--- a/Example/LED_Blink_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
+++ b/Example/LED_Blink_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
@@ -78,6 +78,7 @@ typedef enum
 
 extern uint8 uart_flag;
 extern uint8 uart_data;
+extern uint8 mac_address[17];      //本机mac地址
 
 void bluetooth_ch9141_uart_callback(void);
 void bluetooth_ch9141_enter_at_mode(void);
diff --git a/Example/PIT_Demo/Libraries/doc/version.txt b/Example/PIT_Demo/Libraries/doc/version.txt
index 11ab82e..9d395a4 100644
--- a/Example/PIT_Demo/Libraries/doc/version.txt
+++ b/Example/PIT_Demo/Libraries/doc/version.txt
@@ -1,3 +1,6 @@
+V1.2.1
+    解决printf关闭的时候，编译报错的问题
+
 V1.2.0
     增加CH9141蓝牙转串口模块的驱动
     添加无线类型的枚举变量
diff --git a/Example/PIT_Demo/Libraries/seekfree_libraries/zf_uart.c b/Example/PIT_Demo/Libraries/seekfree_libraries/zf_uart.c
index 0e0162e..271b5b0 100644
--- a/Example/PIT_Demo/Libraries/seekfree_libraries/zf_uart.c
+++ b/Example/PIT_Demo/Libraries/seekfree_libraries/zf_uart.c
@@ -351,6 +351,7 @@ uint8 uart_query(UARTN_enum uartn, uint8 *dat)
     return 0;
 }
 
+#if(1 == PRINTF_ENABLE)
 //-------------------------------------------------------------------------------------------------------------------
 //  @brief      重定义printf 到串口
 //  @param      ch      需要打印的字节
@@ -362,4 +363,5 @@ int fputc(int ch, FILE *stream)
     uart_putchar(DEBUG_UART, (char)ch);
     return(ch);
 }
+#endif
 
diff --git a/Example/PIT_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h b/Example/PIT_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
index 2961771..b5559e4 100644
--- a/Example/PIT_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
+++ b/Example/PIT_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
@@ -78,6 +78,7 @@ typedef enum
 
 extern uint8 uart_flag;
 extern uint8 uart_data;
+extern uint8 mac_address[17];      //本机mac地址
 
 void bluetooth_ch9141_uart_callback(void);
 void bluetooth_ch9141_enter_at_mode(void);
diff --git a/Example/PWM_Demo/Libraries/doc/version.txt b/Example/PWM_Demo/Libraries/doc/version.txt
index 11ab82e..9d395a4 100644
--- a/Example/PWM_Demo/Libraries/doc/version.txt
+++ b/Example/PWM_Demo/Libraries/doc/version.txt
@@ -1,3 +1,6 @@
+V1.2.1
+    解决printf关闭的时候，编译报错的问题
+
 V1.2.0
     增加CH9141蓝牙转串口模块的驱动
     添加无线类型的枚举变量
diff --git a/Example/PWM_Demo/Libraries/seekfree_libraries/zf_uart.c b/Example/PWM_Demo/Libraries/seekfree_libraries/zf_uart.c
index 0e0162e..271b5b0 100644
--- a/Example/PWM_Demo/Libraries/seekfree_libraries/zf_uart.c
+++ b/Example/PWM_Demo/Libraries/seekfree_libraries/zf_uart.c
@@ -351,6 +351,7 @@ uint8 uart_query(UARTN_enum uartn, uint8 *dat)
     return 0;
 }
 
+#if(1 == PRINTF_ENABLE)
 //-------------------------------------------------------------------------------------------------------------------
 //  @brief      重定义printf 到串口
 //  @param      ch      需要打印的字节
@@ -362,4 +363,5 @@ int fputc(int ch, FILE *stream)
     uart_putchar(DEBUG_UART, (char)ch);
     return(ch);
 }
+#endif
 
diff --git a/Example/PWM_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h b/Example/PWM_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
index 2961771..b5559e4 100644
--- a/Example/PWM_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
+++ b/Example/PWM_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
@@ -78,6 +78,7 @@ typedef enum
 
 extern uint8 uart_flag;
 extern uint8 uart_data;
+extern uint8 mac_address[17];      //本机mac地址
 
 void bluetooth_ch9141_uart_callback(void);
 void bluetooth_ch9141_enter_at_mode(void);
diff --git a/Example/Printf_Demo/Libraries/doc/version.txt b/Example/Printf_Demo/Libraries/doc/version.txt
index 11ab82e..9d395a4 100644
--- a/Example/Printf_Demo/Libraries/doc/version.txt
+++ b/Example/Printf_Demo/Libraries/doc/version.txt
@@ -1,3 +1,6 @@
+V1.2.1
+    解决printf关闭的时候，编译报错的问题
+
 V1.2.0
     增加CH9141蓝牙转串口模块的驱动
     添加无线类型的枚举变量
diff --git a/Example/Printf_Demo/Libraries/seekfree_libraries/zf_uart.c b/Example/Printf_Demo/Libraries/seekfree_libraries/zf_uart.c
index 0e0162e..271b5b0 100644
--- a/Example/Printf_Demo/Libraries/seekfree_libraries/zf_uart.c
+++ b/Example/Printf_Demo/Libraries/seekfree_libraries/zf_uart.c
@@ -351,6 +351,7 @@ uint8 uart_query(UARTN_enum uartn, uint8 *dat)
     return 0;
 }
 
+#if(1 == PRINTF_ENABLE)
 //-------------------------------------------------------------------------------------------------------------------
 //  @brief      重定义printf 到串口
 //  @param      ch      需要打印的字节
@@ -362,4 +363,5 @@ int fputc(int ch, FILE *stream)
     uart_putchar(DEBUG_UART, (char)ch);
     return(ch);
 }
+#endif
 
diff --git a/Example/Printf_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h b/Example/Printf_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
index 2961771..b5559e4 100644
--- a/Example/Printf_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
+++ b/Example/Printf_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
@@ -78,6 +78,7 @@ typedef enum
 
 extern uint8 uart_flag;
 extern uint8 uart_data;
+extern uint8 mac_address[17];      //本机mac地址
 
 void bluetooth_ch9141_uart_callback(void);
 void bluetooth_ch9141_enter_at_mode(void);
diff --git a/Example/Specifies_Variable_Or_Code_Location_Demo/Libraries/doc/version.txt b/Example/Specifies_Variable_Or_Code_Location_Demo/Libraries/doc/version.txt
index 11ab82e..9d395a4 100644
--- a/Example/Specifies_Variable_Or_Code_Location_Demo/Libraries/doc/version.txt
+++ b/Example/Specifies_Variable_Or_Code_Location_Demo/Libraries/doc/version.txt
@@ -1,3 +1,6 @@
+V1.2.1
+    解决printf关闭的时候，编译报错的问题
+
 V1.2.0
     增加CH9141蓝牙转串口模块的驱动
     添加无线类型的枚举变量
diff --git a/Example/Specifies_Variable_Or_Code_Location_Demo/Libraries/seekfree_libraries/zf_uart.c b/Example/Specifies_Variable_Or_Code_Location_Demo/Libraries/seekfree_libraries/zf_uart.c
index 0e0162e..271b5b0 100644
--- a/Example/Specifies_Variable_Or_Code_Location_Demo/Libraries/seekfree_libraries/zf_uart.c
+++ b/Example/Specifies_Variable_Or_Code_Location_Demo/Libraries/seekfree_libraries/zf_uart.c
@@ -351,6 +351,7 @@ uint8 uart_query(UARTN_enum uartn, uint8 *dat)
     return 0;
 }
 
+#if(1 == PRINTF_ENABLE)
 //-------------------------------------------------------------------------------------------------------------------
 //  @brief      重定义printf 到串口
 //  @param      ch      需要打印的字节
@@ -362,4 +363,5 @@ int fputc(int ch, FILE *stream)
     uart_putchar(DEBUG_UART, (char)ch);
     return(ch);
 }
+#endif
 
diff --git a/Example/Specifies_Variable_Or_Code_Location_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h b/Example/Specifies_Variable_Or_Code_Location_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
index 2961771..b5559e4 100644
--- a/Example/Specifies_Variable_Or_Code_Location_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
+++ b/Example/Specifies_Variable_Or_Code_Location_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
@@ -78,6 +78,7 @@ typedef enum
 
 extern uint8 uart_flag;
 extern uint8 uart_data;
+extern uint8 mac_address[17];      //本机mac地址
 
 void bluetooth_ch9141_uart_callback(void);
 void bluetooth_ch9141_enter_at_mode(void);
diff --git a/Example/Systick_Demo/Libraries/doc/version.txt b/Example/Systick_Demo/Libraries/doc/version.txt
index 11ab82e..9d395a4 100644
--- a/Example/Systick_Demo/Libraries/doc/version.txt
+++ b/Example/Systick_Demo/Libraries/doc/version.txt
@@ -1,3 +1,6 @@
+V1.2.1
+    解决printf关闭的时候，编译报错的问题
+
 V1.2.0
     增加CH9141蓝牙转串口模块的驱动
     添加无线类型的枚举变量
diff --git a/Example/Systick_Demo/Libraries/seekfree_libraries/zf_uart.c b/Example/Systick_Demo/Libraries/seekfree_libraries/zf_uart.c
index 0e0162e..271b5b0 100644
--- a/Example/Systick_Demo/Libraries/seekfree_libraries/zf_uart.c
+++ b/Example/Systick_Demo/Libraries/seekfree_libraries/zf_uart.c
@@ -351,6 +351,7 @@ uint8 uart_query(UARTN_enum uartn, uint8 *dat)
     return 0;
 }
 
+#if(1 == PRINTF_ENABLE)
 //-------------------------------------------------------------------------------------------------------------------
 //  @brief      重定义printf 到串口
 //  @param      ch      需要打印的字节
@@ -362,4 +363,5 @@ int fputc(int ch, FILE *stream)
     uart_putchar(DEBUG_UART, (char)ch);
     return(ch);
 }
+#endif
 
diff --git a/Example/Systick_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h b/Example/Systick_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
index 2961771..b5559e4 100644
--- a/Example/Systick_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
+++ b/Example/Systick_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
@@ -78,6 +78,7 @@ typedef enum
 
 extern uint8 uart_flag;
 extern uint8 uart_data;
+extern uint8 mac_address[17];      //本机mac地址
 
 void bluetooth_ch9141_uart_callback(void);
 void bluetooth_ch9141_enter_at_mode(void);
diff --git a/Example/UART_Demo/Libraries/doc/version.txt b/Example/UART_Demo/Libraries/doc/version.txt
index 11ab82e..9d395a4 100644
--- a/Example/UART_Demo/Libraries/doc/version.txt
+++ b/Example/UART_Demo/Libraries/doc/version.txt
@@ -1,3 +1,6 @@
+V1.2.1
+    解决printf关闭的时候，编译报错的问题
+
 V1.2.0
     增加CH9141蓝牙转串口模块的驱动
     添加无线类型的枚举变量
diff --git a/Example/UART_Demo/Libraries/seekfree_libraries/zf_uart.c b/Example/UART_Demo/Libraries/seekfree_libraries/zf_uart.c
index 0e0162e..271b5b0 100644
--- a/Example/UART_Demo/Libraries/seekfree_libraries/zf_uart.c
+++ b/Example/UART_Demo/Libraries/seekfree_libraries/zf_uart.c
@@ -351,6 +351,7 @@ uint8 uart_query(UARTN_enum uartn, uint8 *dat)
     return 0;
 }
 
+#if(1 == PRINTF_ENABLE)
 //-------------------------------------------------------------------------------------------------------------------
 //  @brief      重定义printf 到串口
 //  @param      ch      需要打印的字节
@@ -362,4 +363,5 @@ int fputc(int ch, FILE *stream)
     uart_putchar(DEBUG_UART, (char)ch);
     return(ch);
 }
+#endif
 
diff --git a/Example/UART_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h b/Example/UART_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
index 2961771..b5559e4 100644
--- a/Example/UART_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
+++ b/Example/UART_Demo/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
@@ -78,6 +78,7 @@ typedef enum
 
 extern uint8 uart_flag;
 extern uint8 uart_data;
+extern uint8 mac_address[17];      //本机mac地址
 
 void bluetooth_ch9141_uart_callback(void);
 void bluetooth_ch9141_enter_at_mode(void);
diff --git a/Seekfree_TC264_Opensource_Library/Libraries/doc/version.txt b/Seekfree_TC264_Opensource_Library/Libraries/doc/version.txt
index 11ab82e..9d395a4 100644
--- a/Seekfree_TC264_Opensource_Library/Libraries/doc/version.txt
+++ b/Seekfree_TC264_Opensource_Library/Libraries/doc/version.txt
@@ -1,3 +1,6 @@
+V1.2.1
+    解决printf关闭的时候，编译报错的问题
+
 V1.2.0
     增加CH9141蓝牙转串口模块的驱动
     添加无线类型的枚举变量
diff --git a/Seekfree_TC264_Opensource_Library/Libraries/seekfree_libraries/zf_uart.c b/Seekfree_TC264_Opensource_Library/Libraries/seekfree_libraries/zf_uart.c
index 0e0162e..271b5b0 100644
--- a/Seekfree_TC264_Opensource_Library/Libraries/seekfree_libraries/zf_uart.c
+++ b/Seekfree_TC264_Opensource_Library/Libraries/seekfree_libraries/zf_uart.c
@@ -351,6 +351,7 @@ uint8 uart_query(UARTN_enum uartn, uint8 *dat)
     return 0;
 }
 
+#if(1 == PRINTF_ENABLE)
 //-------------------------------------------------------------------------------------------------------------------
 //  @brief      重定义printf 到串口
 //  @param      ch      需要打印的字节
@@ -362,4 +363,5 @@ int fputc(int ch, FILE *stream)
     uart_putchar(DEBUG_UART, (char)ch);
     return(ch);
 }
+#endif
 
diff --git a/Seekfree_TC264_Opensource_Library/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h b/Seekfree_TC264_Opensource_Library/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
index 2961771..b5559e4 100644
--- a/Seekfree_TC264_Opensource_Library/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
+++ b/Seekfree_TC264_Opensource_Library/Libraries/seekfree_peripheral/SEEKFREE_BLUETOOTH_CH9141.h
@@ -78,6 +78,7 @@ typedef enum
 
 extern uint8 uart_flag;
 extern uint8 uart_data;
+extern uint8 mac_address[17];      //本机mac地址
 
 void bluetooth_ch9141_uart_callback(void);
 void bluetooth_ch9141_enter_at_mode(void);