[Ardunio]为stm32f103-blue-pill对接RTdunio软件包 (#6231)

* 对接RTdunio

13 files changed, 295 insertions, 25 deletions

diff --git a/bsp/stm32/stm32f072-st-nucleo/applications/arduino_main.cpp b/bsp/stm32/stm32f072-st-nucleo/applications/arduino_main.cpp
index bf0431f83d..3219ffc63d 100644
--- a/bsp/stm32/stm32f072-st-nucleo/applications/arduino_main.cpp
+++ b/bsp/stm32/stm32f072-st-nucleo/applications/arduino_main.cpp
@@ -13,11 +13,12 @@
 void setup(void)
 {
     /* put your setup code here, to run once: */
+    Serial.begin();
 }
 
 void loop(void)
 {
     /* put your main code here, to run repeatedly: */
-    Serial.println("Hello Arduino!\n");
+    Serial.println("Hello Arduino!");
     delay(800);
 }
diff --git a/bsp/stm32/stm32f103-blue-pill/applications/SConscript b/bsp/stm32/stm32f103-blue-pill/applications/SConscript
index 9bb9abae89..6b22aa91b9 100644
--- a/bsp/stm32/stm32f103-blue-pill/applications/SConscript
+++ b/bsp/stm32/stm32f103-blue-pill/applications/SConscript
@@ -5,6 +5,9 @@ cwd = GetCurrentDir()
 src = Glob('*.c')
 CPPPATH = [cwd]
 
+if GetDepend(['PKG_USING_RTDUINO']) and not GetDepend(['RTDUINO_NO_SETUP_LOOP']):
+    src += ['arduino_main.cpp']
+    
 group = DefineGroup('Applications', src, depend = [''], CPPPATH = CPPPATH)
 
 list = os.listdir(cwd)
diff --git a/bsp/stm32/stm32f103-blue-pill/applications/arduino_main.cpp b/bsp/stm32/stm32f103-blue-pill/applications/arduino_main.cpp
new file mode 100644
index 0000000000..254c3d2e13
--- /dev/null
+++ b/bsp/stm32/stm32f103-blue-pill/applications/arduino_main.cpp
@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2006-2022, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2022-08-05     liYony       first version
+ */
+
+#include <Arduino.h>
+
+void setup(void)
+{
+    /* put your setup code here, to run once: */
+    Serial.begin();
+}
+
+void loop(void)
+{
+    /* put your main code here, to run repeatedly: */
+    Serial.println("Hello Arduino!");
+    delay(800);
+}
diff --git a/bsp/stm32/stm32f103-blue-pill/applications/arduino_pinout/README.md b/bsp/stm32/stm32f103-blue-pill/applications/arduino_pinout/README.md
new file mode 100644
index 0000000000..23323fa9fa
--- /dev/null
+++ b/bsp/stm32/stm32f103-blue-pill/applications/arduino_pinout/README.md
@@ -0,0 +1,74 @@
+# STM32F103 Blue-Pill开发板的Arduino生态兼容说明
+
+## 1 RTduino - RT-Thread的Arduino生态兼容层
+
+STM32F103 Blue-Pill开发板已经完整适配了[RTduino软件包](https://github.com/RTduino/RTduino)，即RT-Thread的Arduino生态兼容层。用户可以按照Arduino的编程习惯来操作该BSP，并且可以使用大量Arduino社区丰富的库，是对RT-Thread生态的极大增强。更多信息，请参见[RTduino软件包说明文档](https://github.com/RTduino/RTduino)。
+
+### 1.1 如何开启针对本BSP的Arduino生态兼容层
+
+Env 工具下敲入 menuconfig 命令，或者 RT-Thread Studio IDE 下选择 RT-Thread Settings：
+
+```Kconfig
+Hardware Drivers Config --->
+    Onboard Peripheral Drivers --->
+        [*] Support Arduino
+```
+
+## 2 Arduino引脚排布
+
+![blue-pill-f103-pinout](blue-pill-f103-pinout.png)
+
+该BSP遵照Arduino UNO板的引脚排列方式，并扩展增加了Blue-pill自身的板载资源功能引脚。详见 `pins_arduino.c`
+
+| Arduino引脚编号 | STM32引脚编号 | 5V容忍 | 备注                                                         |
+| --------------- | ------------- | ------ | ------------------------------------------------------------ |
+| 0 (D0)          | --            |        | 该引脚在UNO板中为串口RX引脚，不可当做普通IO                     |
+| 1 (D1)          | --            |        | 该引脚在UNO板中为串口TX引脚，不可当做普通IO                     |
+| 2 (D2)          | PB9           | 是     | I2C1-SDA，被RT-Thread的I2C设备框架i2c1总线接管，不可当做普通IO  |
+| 3 (D3)          | PB8           | 是     | I2C1_SCL，被RT-Thread的I2C设备框架i2c1总线接管，不可当做普通IO  |
+| 4 (D4)          | PB7           | 是     |                                                              |
+| 5 (D5)          | PB6           | 是     |                                                              |
+| 6 (D6)          | PB5           | 否     | PWM3-CH2（定时器3发生）                                       |
+| 7 (D7)          | PB4           | 是     | PWM3-CH1（定时器3发生）                                       |
+| 8 (D8)          | PB3           | 是     | PWM2-CH2（定时器2发生）                                       |
+| 9 (D9)          | PA15          | 是     | PWM2-CH1（定时器2发生）                                       | 
+| 10 (D10)        | PA12          | 是     | USB-DB，不可当做普通IO                                        |
+| 11 (D11)        | PA11          | 是     | USB-DM，不可当做普通IO                                        |
+| 12 (D12)        | PA10          | 是     | UART1-RX，被RT-Thread的UART设备框架uart1接管，不可当做普通IO    |
+| 13 (D13)        | PA9           | 是     | UART1-RX，被RT-Thread的UART设备框架uart1接管，不可当做普通IO    |
+| 14 (D14)        | PA8           | 是     | PWM1-CH1（定时器1发生）                                       |
+| 15 (D15)        | PB15          | 是     |                                                              |
+| 16 (D16)        | PB14          | 是     |                                                              |
+| 17 (D17)        | PB13          | 是     | PWM1-CH1N（定时器1发生）                                      |
+| 18 (D18)        | PB12          | 是     |                                                              |
+| 19 (D19)        | PC13          | 否     | 板载LED默认引脚                                               |
+| 20 (D20)        | PC14          | 否     |                                                              |
+| 21 (D21)        | PC15          | 否     |                                                              |
+| 22 (D22)        | PA2           | 否     | UART2-TX，被RT-Thread的UART设备框架uart2接管，不可当做普通IO    |
+| 23 (D23)        | PA3           | 否     | UART2-RX，被RT-Thread的UART设备框架uart2接管，不可当做普通IO    |
+| 24 (D24)        | PA5           | 否     | SPI-SCK， SPI功能尚未完全实现，目前仅作普通IO使用               |
+| 25 (D25)        | PA6           | 否     | SPI-MISO，SPI功能尚未完全实现，目前仅作普通IO使用               |
+| 26 (D26)        | PA7           | 否     | SPI-MOSI，SPI功能尚未完全实现，目前仅作普通IO使用               |
+| 27 (D27)        | PB10          | 是     | UART3-TX，被RT-Thread的UART设备框架uart3接管，不可当做普通IO    |
+| 28 (D28)        | PB11          | 是     | UART3-RX，被RT-Thread的UART设备框架uart3接管，不可当做普通IO    |
+| A0              | PA0           | 否     | ADC                                                          |
+| A1              | PA1           | 否     | ADC                                                          |
+| A2              | PA4           | 否     | ADC                                                          |
+| A3              | PB0           | 否     | ADC                                                          |
+| A4              | PB1           | 否     | ADC                                                          |
+| A5              | --            |        | 芯片内部参考电压 ADC                                          |
+| A6              | --            |        | 芯片内部温度 ADC                                              |
+
+> 注意：
+>
+> 1. 驱动舵机和analogWrite函数要选择不同定时器发生的PWM信号引脚，由于STM32的定时器4个通道需要保持相同的频率，如果采用相同的定时器发生的PWM分别驱动舵机和analogWrite，可能会导致舵机失效。
+> 4. D10引脚是PWM反相位引脚(也就是常说的互补输出引脚CHxN)。但是这里不用考虑到占空比互补问题（CHx-20%，CHxN-80%），直接正常使用即可。
+> 4. STM32的PA15引脚默认作为JTAG下载使用，但是如果采用SWD调试时，PA15(D9)可以作为普通的IO口使用，但是需要设置一些寄存器。
+
+> 参考资料
+>
+> 1. 暂无
+
+## 3 I2C总线
+
+STM32F103 Blue-Pill板的I2C总线是板上丝印的 `SCL/D3` 和 `SDA/D2` 引脚，这两个引脚是被RT-Thread I2C设备框架接管的，不需要直接操控这两个引脚，直接引用`#include <Wire.h>`（Arduino官方I2C头文件）即可使用。
diff --git a/bsp/stm32/stm32f103-blue-pill/applications/arduino_pinout/SConscript b/bsp/stm32/stm32f103-blue-pill/applications/arduino_pinout/SConscript
new file mode 100644
index 0000000000..beb0cb7a7c
--- /dev/null
+++ b/bsp/stm32/stm32f103-blue-pill/applications/arduino_pinout/SConscript
@@ -0,0 +1,9 @@
+from building import *
+
+cwd = GetCurrentDir()
+src = Glob('*.c') + Glob('*.cpp')
+inc = [cwd]
+
+group = DefineGroup('Arduino', src, depend = ['PKG_USING_RTDUINO'], CPPPATH = inc)
+
+Return('group')
diff --git a/bsp/stm32/stm32f103-blue-pill/applications/arduino_pinout/blue-pill-f103-pinout.png b/bsp/stm32/stm32f103-blue-pill/applications/arduino_pinout/blue-pill-f103-pinout.png
new file mode 100644
index 0000000000..dd1c50a677
--- /dev/null
+++ b/bsp/stm32/stm32f103-blue-pill/applications/arduino_pinout/blue-pill-f103-pinout.png
diff --git a/bsp/stm32/stm32f103-blue-pill/applications/arduino_pinout/pins_arduino.c b/bsp/stm32/stm32f103-blue-pill/applications/arduino_pinout/pins_arduino.c
new file mode 100644
index 0000000000..1e0de799bc
--- /dev/null
+++ b/bsp/stm32/stm32f103-blue-pill/applications/arduino_pinout/pins_arduino.c
@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2006-2022, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2022-08-05     liYony       first version
+ */
+#include <Arduino.h>
+#include <board.h>
+#include "pins_arduino.h"
+
+/*
+    {Arduino Pin, RT-Thread Pin [, Device Name(PWM or ADC), Channel]}
+    [] means optional
+    Digital pins must NOT give the device name and channel.
+    Analog pins MUST give the device name and channel(ADC, PWM or DAC).
+    Arduino Pin must keep in sequence.
+*/
+const pin_map_t pin_map_table[]=
+{
+    {D0}, /* RX */
+    {D1}, /* TX */
+    {D2}, /* I2C1-SDA */
+    {D3}, /* I2C1-SCL */
+    {D4, GET_PIN(B,7)},
+    {D5, GET_PIN(B,6)},
+    {D6, GET_PIN(B,5), "pwm3", 2},/* PWM */
+    {D7, GET_PIN(B,4), "pwm3", 1}, /* PWM */
+    {D8, GET_PIN(B,3), "pwm2", 2}, /* PWM */
+    {D9, GET_PIN(A,15), "pwm2", 1}, /* PWM */
+    {D10}, /* USB-DP */
+    {D11}, /* USB-DM */
+    {D12}, /* UART1-RX */
+    {D13}, /* UART1-TX */
+    {D14, GET_PIN(A,8), "pwm1", 1}, /* PWM */
+    {D15, GET_PIN(B,15)},
+    {D16, GET_PIN(B,14)},
+    {D17, GET_PIN(B,13), "pwm1", -1}, /* PWM */
+    {D18, GET_PIN(B,12)},
+    {D19, GET_PIN(C,13)}, /* user led1 */
+    {D20, GET_PIN(C,14)},
+    {D21, GET_PIN(C,15)},
+    {D22}, /* UART2-TX */
+    {D23}, /* UART2-RX */
+    /* The connection of RTdunio SPI has not been completed, *
+     * and it can only be used as a common GPIO at present.  */
+    {D24, GET_PIN(A,5)}, /* SPI-SCK */
+    {D25, GET_PIN(A,6)}, /* SPI-MISO */
+    {D26, GET_PIN(A,7)}, /* SPI-MOSI */
+    {D27}, /* UART3-TX */
+    {D28}, /* UART3-RX */
+    {A0, GET_PIN(A,0), "adc1", 0}, /* ADC */
+    {A1, GET_PIN(A,1), "adc1", 1}, /* ADC */
+    {A2, GET_PIN(A,4), "adc1", 4}, /* ADC */
+    {A3, GET_PIN(B,0), "adc1", 8}, /* ADC */
+    {A4, GET_PIN(B,1), "adc1", 9}, /* ADC */
+    {A5, RT_NULL, "adc1", 17}, /* ADC, On-Chip: internal reference voltage, ADC_CHANNEL_VREFINT */
+    {A6, RT_NULL, "adc1", 16} /* ADC, On-Chip: internal temperature sensor, ADC_CHANNEL_TEMPSENSOR */
+};
diff --git a/bsp/stm32/stm32f103-blue-pill/applications/arduino_pinout/pins_arduino.h b/bsp/stm32/stm32f103-blue-pill/applications/arduino_pinout/pins_arduino.h
new file mode 100644
index 0000000000..7c69c82807
--- /dev/null
+++ b/bsp/stm32/stm32f103-blue-pill/applications/arduino_pinout/pins_arduino.h
@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2006-2022, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2022-08-05     liYony       first version
+ */
+
+#ifndef Pins_Arduino_h
+#define Pins_Arduino_h
+
+/* pins alias. Must keep in sequence */
+#define D0   (0)
+#define D1   (1)
+#define D2   (2)
+#define D3   (3)
+#define D4   (4)
+#define D5   (5)
+#define D6   (6)
+#define D7   (7)
+#define D8   (8)
+#define D9   (9)
+#define D10  (10)
+#define D11  (11)
+#define D12  (12)
+#define D13  (13)
+#define D14  (14)
+#define D15  (15)
+#define D16  (16)
+#define D17  (17)
+#define D18  (18)
+#define D19  (19)
+#define D20  (20)
+#define D21  (21)
+#define D22  (22)
+#define D23  (23)
+#define D24  (24)
+#define D25  (25)
+#define D26  (26)
+#define D27  (27)
+#define D28  (28)
+#define A0   (29)
+#define A1   (30)
+#define A2   (31)
+#define A3   (32)
+#define A4   (33)
+#define A5   (34)
+#define A6   (35)
+
+#define F_CPU  72000000L /* CPU: 72MHz */
+#define LED_BUILTIN  D19 /* Default Built-in LED */
+
+#define RTDUINO_DEFAULT_IIC_BUS_NAME            "i2c1"
+
+#define RTDUINO_SERIAL2_DEVICE_NAME             "uart2"
+#define RTDUINO_SERIAL3_DEVICE_NAME             "uart3"
+
+#endif /* Pins_Arduino_h */
diff --git a/bsp/stm32/stm32f103-blue-pill/board/CubeMX_Config/CubeMX_Config.ioc b/bsp/stm32/stm32f103-blue-pill/board/CubeMX_Config/CubeMX_Config.ioc
index cb1e8f19de..74e56aa6ad 100644
--- a/bsp/stm32/stm32f103-blue-pill/board/CubeMX_Config/CubeMX_Config.ioc
+++ b/bsp/stm32/stm32f103-blue-pill/board/CubeMX_Config/CubeMX_Config.ioc
@@ -33,33 +33,34 @@ Mcu.Pin12=PB0
 Mcu.Pin13=PB1
 Mcu.Pin14=PB10
 Mcu.Pin15=PB11
-Mcu.Pin16=PA8
-Mcu.Pin17=PA9
-Mcu.Pin18=PA10
-Mcu.Pin19=PA11
+Mcu.Pin16=PB13
+Mcu.Pin17=PA8
+Mcu.Pin18=PA9
+Mcu.Pin19=PA10
 Mcu.Pin2=PD0-OSC_IN
-Mcu.Pin20=PA12
-Mcu.Pin21=PA13
-Mcu.Pin22=PA14
-Mcu.Pin23=PA15
-Mcu.Pin24=PB3
-Mcu.Pin25=PB4
-Mcu.Pin26=PB5
-Mcu.Pin27=VP_ADC1_TempSens_Input
-Mcu.Pin28=VP_ADC1_Vref_Input
-Mcu.Pin29=VP_RTC_VS_RTC_Activate
+Mcu.Pin20=PA11
+Mcu.Pin21=PA12
+Mcu.Pin22=PA13
+Mcu.Pin23=PA14
+Mcu.Pin24=PA15
+Mcu.Pin25=PB3
+Mcu.Pin26=PB4
+Mcu.Pin27=PB5
+Mcu.Pin28=VP_ADC1_TempSens_Input
+Mcu.Pin29=VP_ADC1_Vref_Input
 Mcu.Pin3=PD1-OSC_OUT
-Mcu.Pin30=VP_SYS_VS_Systick
-Mcu.Pin31=VP_TIM1_VS_ClockSourceINT
-Mcu.Pin32=VP_TIM2_VS_ClockSourceINT
-Mcu.Pin33=VP_TIM3_VS_ClockSourceINT
+Mcu.Pin30=VP_RTC_VS_RTC_Activate
+Mcu.Pin31=VP_SYS_VS_Systick
+Mcu.Pin32=VP_TIM1_VS_ClockSourceINT
+Mcu.Pin33=VP_TIM2_VS_ClockSourceINT
+Mcu.Pin34=VP_TIM3_VS_ClockSourceINT
 Mcu.Pin4=PA0-WKUP
 Mcu.Pin5=PA1
 Mcu.Pin6=PA2
 Mcu.Pin7=PA3
 Mcu.Pin8=PA4
 Mcu.Pin9=PA5
-Mcu.PinsNb=34
+Mcu.PinsNb=35
 Mcu.ThirdPartyNb=0
 Mcu.UserConstants=
 Mcu.UserName=STM32F103C8Tx
@@ -122,6 +123,9 @@ PB10.Mode=Asynchronous
 PB10.Signal=USART3_TX
 PB11.Mode=Asynchronous
 PB11.Signal=USART3_RX
+PB13.Locked=true
+PB13.Mode=PWM Generation1 CH1 CH1N
+PB13.Signal=TIM1_CH1N
 PB3.Signal=S_TIM2_CH2
 PB4.Signal=S_TIM3_CH1
 PB5.Signal=S_TIM3_CH2
@@ -195,7 +199,7 @@ SH.ADCx_IN8.0=ADC1_IN8,IN8
 SH.ADCx_IN8.ConfNb=1
 SH.ADCx_IN9.0=ADC1_IN9,IN9
 SH.ADCx_IN9.ConfNb=1
-SH.S_TIM1_CH1.0=TIM1_CH1,PWM Generation1 CH1
+SH.S_TIM1_CH1.0=TIM1_CH1,PWM Generation1 CH1 CH1N
 SH.S_TIM1_CH1.ConfNb=1
 SH.S_TIM2_CH1_ETR.0=TIM2_CH1,PWM Generation1 CH1
 SH.S_TIM2_CH1_ETR.ConfNb=1
@@ -211,8 +215,8 @@ SPI1.Direction=SPI_DIRECTION_2LINES
 SPI1.IPParameters=VirtualType,Mode,Direction,BaudRatePrescaler,CalculateBaudRate
 SPI1.Mode=SPI_MODE_MASTER
 SPI1.VirtualType=VM_MASTER
-TIM1.Channel-PWM\ Generation1\ CH1=TIM_CHANNEL_1
-TIM1.IPParameters=Channel-PWM Generation1 CH1
+TIM1.Channel-PWM\ Generation1\ CH1\ CH1N=TIM_CHANNEL_1
+TIM1.IPParameters=Channel-PWM Generation1 CH1 CH1N
 TIM2.Channel-PWM\ Generation1\ CH1=TIM_CHANNEL_1
 TIM2.Channel-PWM\ Generation2\ CH2=TIM_CHANNEL_2
 TIM2.IPParameters=Channel-PWM Generation1 CH1,Channel-PWM Generation2 CH2
diff --git a/bsp/stm32/stm32f103-blue-pill/board/CubeMX_Config/Src/stm32f1xx_hal_msp.c b/bsp/stm32/stm32f103-blue-pill/board/CubeMX_Config/Src/stm32f1xx_hal_msp.c
index b6bb182a4f..1d68034e4d 100644
--- a/bsp/stm32/stm32f103-blue-pill/board/CubeMX_Config/Src/stm32f1xx_hal_msp.c
+++ b/bsp/stm32/stm32f103-blue-pill/board/CubeMX_Config/Src/stm32f1xx_hal_msp.c
@@ -327,10 +327,17 @@ void HAL_TIM_MspPostInit(TIM_HandleTypeDef* htim)
   /* USER CODE BEGIN TIM1_MspPostInit 0 */
 
   /* USER CODE END TIM1_MspPostInit 0 */
+    __HAL_RCC_GPIOB_CLK_ENABLE();
     __HAL_RCC_GPIOA_CLK_ENABLE();
     /**TIM1 GPIO Configuration
+    PB13     ------> TIM1_CH1N
     PA8     ------> TIM1_CH1
     */
+    GPIO_InitStruct.Pin = GPIO_PIN_13;
+    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
+    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
+    HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
+
     GPIO_InitStruct.Pin = GPIO_PIN_8;
     GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
     GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
diff --git a/bsp/stm32/stm32f103-blue-pill/board/Kconfig b/bsp/stm32/stm32f103-blue-pill/board/Kconfig
index 3d546c6975..6e27e245c0 100644
--- a/bsp/stm32/stm32f103-blue-pill/board/Kconfig
+++ b/bsp/stm32/stm32f103-blue-pill/board/Kconfig
@@ -15,6 +15,32 @@ menu "Onboard Peripheral Drivers"
         select BSP_USING_UART1
         default y
 
+      config BSP_USING_ARDUINO
+        bool "Support Arduino"
+        select PKG_USING_RTDUINO
+        select BSP_USING_STLINK_TO_USART
+        select BSP_USING_UART2
+        select BSP_USING_UART3
+        select BSP_USING_GPIO
+        select BSP_USING_ADC
+        select BSP_USING_ADC1
+        select BSP_USING_PWM
+        select BSP_USING_PWM1
+        select BSP_USING_PWM1_CH1
+        select BSP_USING_PWM2
+        select BSP_USING_PWM2_CH1
+        select BSP_USING_PWM2_CH2
+        select BSP_USING_PWM3
+        select BSP_USING_PWM3_CH1
+        select BSP_USING_PWM3_CH2
+        select BSP_USING_I2C
+        select BSP_USING_I2C1
+        imply RTDUINO_USING_SERVO
+        imply RTDUINO_USING_WIRE
+        imply RTDUINO_USING_ADAFRUIT
+        imply RTDUINO_USING_MSTIMER2
+        default n
+
 endmenu
 
 menu "On-chip Peripheral Drivers"
diff --git a/bsp/stm32/stm32f401-st-nucleo/applications/arduino_main.cpp b/bsp/stm32/stm32f401-st-nucleo/applications/arduino_main.cpp
index 39391c9650..b2b2ab8162 100644
--- a/bsp/stm32/stm32f401-st-nucleo/applications/arduino_main.cpp
+++ b/bsp/stm32/stm32f401-st-nucleo/applications/arduino_main.cpp
@@ -13,11 +13,12 @@
 void setup(void)
 {
     /* put your setup code here, to run once: */
+    Serial.begin();
 }
 
 void loop(void)
 {
     /* put your main code here, to run repeatedly: */
-    Serial.println("Hello Arduino!\n");
+    Serial.println("Hello Arduino!");
     delay(800);
 }
diff --git a/bsp/stm32/stm32f401-st-nucleo/board/Kconfig b/bsp/stm32/stm32f401-st-nucleo/board/Kconfig
index 20d37d836a..940c0f632e 100644
--- a/bsp/stm32/stm32f401-st-nucleo/board/Kconfig
+++ b/bsp/stm32/stm32f401-st-nucleo/board/Kconfig
@@ -14,7 +14,7 @@ menu "Onboard Peripheral Drivers"
         select BSP_USING_UART2
         default y
 
-   config BSP_USING_ARDUINO
+    config BSP_USING_ARDUINO
         bool "Support Arduino"
         select PKG_USING_RTDUINO
         select BSP_USING_STLINK_TO_USART