update arduino related (#5809)

- add comments
- remove ARDUINO_PWM_HZ
- remove initVariant blank function
- support DAC0
- improve Kconfig of STM32L475 PANDORA
- add readme
- add i2c1 bus device

bsp/stm32/stm32f072-st-nucleo/applications/arduino/pins_arduino.c

@@ -15,7 +15,7 @@
     {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 or PWM).
+    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[]=
@@ -43,9 +43,3 @@ const pin_map_t pin_map_table[]=
     {A4, GET_PIN(C,1), "adc1", 11}, /* ADC */
     {A5, GET_PIN(C,0), "adc1", 10} /* ADC */
 };
-
-/* initialization for BSP; maybe a blank function  */
-void initVariant(void)
-{
-    /* Nothing needs to initialize for this BSP */
-}

bsp/stm32/stm32f072-st-nucleo/applications/arduino/pins_arduino.h

@@ -7,6 +7,7 @@
  * Date           Author       Notes
  * 2021-12-10     Meco Man     first version
  */
+
 #ifndef Pins_Arduino_h
 #define Pins_Arduino_h
 
@@ -34,10 +35,8 @@
 #define A4   (20)
 #define A5   (21)
 
-#define LED_BUILTIN  D13 /* Built-in LED */
-
-#define ARDUINO_PWM_HZ 500 /* Arduino UNO's PWM is around 500Hz */
+#define LED_BUILTIN  D13 /* Default Built-in LED */
 
-#define ARDUINO_DEFAULT_IIC_BUS_NAME "i2c4"
+#define ARDUINO_DEFAULT_IIC_BUS_NAME "i2c1"
 
 #endif /* Pins_Arduino_h */

bsp/stm32/stm32f072-st-nucleo/board/Kconfig

@@ -17,7 +17,7 @@ menu "Onboard Peripheral Drivers"
     config BSP_USING_ARDUINO
         bool "Support Arduino"
         select PKG_USING_RTDUINO
-        select RT_USING_PIN
+        select BSP_USING_GPIO
         select BSP_USING_ADC
         select BSP_USING_ADC1
         select BSP_USING_PWM

bsp/stm32/stm32l475-atk-pandora/applications/arduino/README.md

@@ -0,0 +1,125 @@
+# STM32L475潘多拉的Arduino生态兼容说明
+
+## 1 RTduino - RT-Thread的Arduino生态兼容层
+
+STM32L475潘多拉已经完整适配了[RTduino软件包](https://github.com/mysterywolf/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/mysterywolf/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
+
+该BSP遵照Arduino UNO板的引脚排列方式，并扩展增加了潘多拉自身的板载资源功能引脚。
+
+### 2.1 Arduino引脚排布
+
+详见 `pins_arduino.c`
+
+| Arduino引脚编号       | STM32引脚编号 | 备注                                                      |
+| --------------------- | ------------- | --------------------------------------------------------- |
+| 0 (D0)                | --            | 该引脚在UNO板中为串口RX引脚，不能被使用                   |
+| 1 (D1)                | --            | 该引脚在UNO板中为串口TX引脚，不能被使用                   |
+| 2 (D2)                | PB9           | 普通IO                                                    |
+| 3 (D3)                | PD15          | PWM                                                       |
+| 4 (D4)                | PA8           | 普通IO                                                    |
+| 5 (D5)                | PD14          | 普通IO                                                    |
+| 6 (D6)                | PB11          | PWM                                                       |
+| 7 (D7)                | PB14          | 普通IO                                                    |
+| 8 (D8)                | PB12          | 普通IO                                                    |
+| 9 (D9)                | PD12          | PWM                                                       |
+| 10 (D10)              | PB10          | PWM                                                       |
+| 11 (D11)              | PB8           | PWM                                                       |
+| 12 (D12)              | PB15          | 普通IO                                                    |
+| 13 (D13)              | PB13          | 普通IO                                                    |
+| 14 (D14)              | PA1           | 振动电机-A                                                |
+| 15 (D15)              | PA0           | 振动电机-B                                                |
+| 16 (D16)              | PB2           | 蜂鸣器                                                    |
+| 17 (D17)              | PD10          | KEY0                                                      |
+| 18 (D18)              | PD9           | KEY1                                                      |
+| 19 (D19)              | PD8           | KEY2                                                      |
+| 20 (D20)              | PC13          | KEY-WKUP                                                  |
+| 21 (D21)              | PE7           | 红色LED                                                   |
+| 22 (D22, LED_BUILTIN) | PE8           | 绿色LED，Arduino默认LED                                   |
+| 23 (D23)              | PE9           | 蓝色LED，具有PWM功能                                      |
+| 24 (D24)              | PB0           | 红外发送                                                  |
+| 25 (D25)              | PB1           | 红外接收                                                  |
+| A0                    | PC2           | ADC                                                       |
+| A1                    | PC4           | ADC                                                       |
+| A2                    | --            | 芯片内部参考电压 ADC                                      |
+| A3                    | --            | 芯片内部温度 ADC                                          |
+| A4                    | PC7           | I2C-SDA，被RT-Thread的I2C设备框架i2c1总线接管，无模拟功能 |
+| A5                    | PC6           | I2C-SCL，被RT-Thread的I2C设备框架i2c1总线接管，无模拟功能 |
+| DAC0                  | PA4           | 真模拟输出 DAC                                            |
+
+### 2.2 板载排针的Arduino引脚排布
+
+| STM32引脚编号 | Arduino引脚编号 | 备注     | STM32引脚编号 | Arduino引脚编号 | 备注     |
+| ------------- | --------------- | -------- | ------------- | --------------- | -------- |
+| PB8           | 11 (D11)        | PWM      | PB9           | 2 (D2)          | 普通IO   |
+| PC7           | A4              | I2C1-SDA | PA8           | 4 (D4)          | 普通IO   |
+| PD15          | 3 (D3)          | PWM      | PC6           | A5              | I2C1-SCL |
+| PD13          | --              | --       | PD14          | 5 (D5)          | 普通IO   |
+| PC2           | A0              | ADC      | PD12          | 9 (D9)          | PWM      |
+| PB14          | 7 (D7)          | 普通IO   | PB15          | 12 (D12)        | 普通IO   |
+| PB12          | 8 (D8)          | 普通IO   | PB13          | 13 (D13)        | 普通IO   |
+| PB10          | 10 (D10)        | PWM      | PB11          | 6 (D6)          | PWM      |
+| PC4           | A1              | ADC      | PA4           | DAC0            | DAC      |
+
+### 2.3 板载外设的Arduino引脚排布
+
+| 外设名称              | Arduino引脚编号       | STM32引脚编号 |
+| --------------------- | --------------------- | ------------- |
+| 振动电机-A            | 14 (D14)              | PA1           |
+| 振动电机-B            | 15 (D15)              | PA0           |
+| 蜂鸣器                | 16 (D16)              | PB2           |
+| KEY0                  | 17 (D17)              | PD10          |
+| KEY1                  | 18 (D18)              | PD9           |
+| KEY2                  | 19 (D19)              | PD8           |
+| KEY-WKUP              | 20 (D20)              | PC13          |
+| 红LED                 | 21 (D21)              | PE7           |
+| 绿LED，Arduino默认LED | 22 (D22, LED_BUILTIN) | PE8           |
+| 蓝LED，具有PWM功能    | 23 (D23)              | PE9           |
+| 红外发射              | 24 (D24)              | PB0           |
+| 红外接收              | 25 (D25)              | PB1           |
+
+## 3 I2C总线
+
+潘多拉Arduino支持三条I2C总线，分别是：i2c1、i2c3 和 i2c4。你可以通过`pins_arduino.h`文件中的 `ARDUINO_DEFAULT_IIC_BUS_NAME` 宏来设定Arduino的I2C总线，**默认为 i2c4 总线**。其中：
+
+- i2c1 为用户总线，PC7 为 SDA，PC6 为 SCL。用户可以通过杜邦线连接其他 I2C 传感器/芯片。
+- i2c3 为板载 I2C 外设总线，连接板载 ICM20608（陀螺仪和加速度传感器） 和 AP3216C（距离和光亮度传感器） 芯片
+- i2c4 为板载 I2C 外设总线，连接板载 AHT10（温湿度传感器） 芯片
+
+> 注意：
+>
+> A4和A5引脚在Arduino UNO中即可以被用于模拟管脚，也可以当做I2C引脚使用。在RTduino中，RTduino的I2C功能是由RT-Thread的I2C设备框架直接接管的，A4和A5引脚被定死为I2C引脚。因此，这两个引脚实际并未被定义。
+>
+> 您只需要知道，如果想要使用I2C功能，只需要修改 `ARDUINO_DEFAULT_IIC_BUS_NAME` 宏的对应名称即可直接使用。与A4和A5这两个标识没有什么关系。
+
+## 4 特殊功能说明
+
+### 4.1 芯片内部ADC通道
+
+本BSP适配了STM32的两个芯片内部ADC通道，可以通过 analogRead 函数来分别获取如下功能：
+
+| 特殊功能             | Arduino引脚编号 | STM32引脚编号 |
+| -------------------- | --------------- | ------------- |
+| 芯片内部参考电压 ADC | A2              | --            |
+| 芯片内部温度 ADC     | A3              | --            |
+
+### 4.2 真模拟输出功能 (True Analog Output)
+
+Arduino的 analogWrite 函数虽为模拟写，但是实际输出的是PWM数字信号，并非真正的模拟信号。这是由于Arduino早期使用的AVR单片机并不支持DAC的功能，因此这个习惯就被保留了下来。但是随着Arduino支持芯片的丰富，部分高级芯片已经内建了DAC（例如Arduino官方板MKR、Zero等），因此Arduino的 analogWrite 函数后续也支持了真模拟输出功能。
+
+在潘多拉板上，使用PA4来当做真模拟输出功能引脚，使用方法为：
+
+```c
+analogWrite(DAC0, 1024); // STM32的DAC分辨率为12位，因此第二个参数范围可以为0-4095
+```

bsp/stm32/stm32l475-atk-pandora/applications/arduino/pins_arduino.c

@@ -15,7 +15,7 @@
     {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 or PWM).
+    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[]=
@@ -44,14 +44,11 @@ const pin_map_t pin_map_table[]=
     {D21, GET_PIN(E,7)}, /* BSP: RED-LED */
     {D22, GET_PIN(E,8)}, /* LED_BUILTIN, BSP: GREEN-LED */
     {D23, GET_PIN(E,9), "pwm1", 1}, /* PWM, BSP: BLUE-LED */
+    {D24, GET_PIN(B,0)}, /* INFRARED EMISSION */
+    {D25, GET_PIN(B,1)}, /* INFRARED RECEPTION */
     {A0, GET_PIN(C,2), "adc1", 3}, /* ADC */
     {A1, GET_PIN(C,4), "adc1", 13}, /* ADC */
     {A2, RT_NULL, "adc1", 0}, /* ADC, On-Chip: internal reference voltage */
-    {A3, RT_NULL, "adc1", 17} /* ADC, On-Chip: internal temperature sensor */
+    {A3, RT_NULL, "adc1", 17}, /* ADC, On-Chip: internal temperature sensor */
+    {DAC0, GET_PIN(A,4), "dac1", 1} /* DAC */
 };
-
-/* initialization for BSP; maybe a blank function  */
-void initVariant(void)
-{
-    /* Nothing needs to initialize for this BSP */
-}

bsp/stm32/stm32l475-atk-pandora/applications/arduino/pins_arduino.h

@@ -7,6 +7,7 @@
  * Date           Author       Notes
  * 2021-12-10     Meco Man     first version
  */
+
 #ifndef Pins_Arduino_h
 #define Pins_Arduino_h
 
@@ -35,15 +36,21 @@
 #define D21  (21)
 #define D22  (22)
 #define D23  (23)
-#define A0   (24)
-#define A1   (25)
-#define A2   (26)
-#define A3   (27)
-
-#define LED_BUILTIN  D22 /* Built-in LED */
+#define D24  (24)
+#define D25  (25)
+#define A0   (26)
+#define A1   (27)
+#define A2   (28)
+#define A3   (29)
+#define DAC0 (30)
 
-#define ARDUINO_PWM_HZ 500 /* Arduino UNO's PWM is around 500Hz */
+#define LED_BUILTIN  D22 /* Default Built-in LED */
 
+/*
+ * i2c1 - PC7-SDA PC6-SCL(User I2C)
+ * i2c3 - ICM20608, AP3216C (On Board)
+ * i2c4 - AHT10 (On Board)
+ */
 #define ARDUINO_DEFAULT_IIC_BUS_NAME "i2c4"
 
 #endif /* Pins_Arduino_h */

bsp/stm32/stm32l475-atk-pandora/board/Kconfig

@@ -22,6 +22,7 @@ menu "Onboard Peripheral Drivers"
     config BSP_USING_ARDUINO
         bool "Support Arduino"
         select PKG_USING_RTDUINO
+        select BSP_USING_GPIO
         select BSP_USING_PWM
         select BSP_USING_PWM1
         select BSP_USING_PWM1_CH1
@@ -35,12 +36,14 @@ menu "Onboard Peripheral Drivers"
         select BSP_USING_ADC
         select BSP_USING_ADC1
         select BSP_USING_I2C
+        select BSP_USING_I2C1
         select BSP_USING_I2C3
         select BSP_USING_I2C4
+        select BSP_USING_DAC
+        select BSP_USING_DAC1
         imply RTDUINO_USING_SERVO
         imply RTDUINO_USING_WIRE
         imply RTDUINO_USING_ADAFRUIT
-        imply RTDUINO_USING_USBSERIAL
         default n
 
     config BSP_USING_KEY
@@ -95,7 +98,7 @@ menu "Onboard Peripheral Drivers"
         default n
 
     config BSP_USING_ICM20608
-        bool "Enable icm20608 (i2c3)"
+        bool "Enable ICM20608 (i2c3)"
         select BSP_USING_I2C
         select BSP_USING_I2C3
         select PKG_USING_SENSORS_DRIVERS
@@ -104,7 +107,7 @@ menu "Onboard Peripheral Drivers"
         default n
         
     config BSP_USING_AHT10
-        bool "Enable aht10 (i2c4)"
+        bool "Enable AHT10 (i2c4)"
         select BSP_USING_I2C
         select BSP_USING_I2C4
         select PKG_USING_SENSORS_DRIVERS
@@ -261,12 +264,12 @@ menu "On-chip Peripheral Drivers"
         default n
 
     menuconfig BSP_USING_SPI
-        bool "Enable SPI BUS"
+        bool "Enable SPI Bus"
         default n
         select RT_USING_SPI
         if BSP_USING_SPI
             config BSP_USING_SPI1
-                bool "Enable SPI1 BUS"
+                bool "Enable SPI1 Bus"
                 default n
 
             config BSP_SPI1_TX_USING_DMA
@@ -281,7 +284,7 @@ menu "On-chip Peripheral Drivers"
                 default n
 
             config BSP_USING_SPI2
-                bool "Enable SPI2 BUS"
+                bool "Enable SPI2 Bus"
                 default n  
                 
             config BSP_SPI2_TX_USING_DMA
@@ -296,7 +299,7 @@ menu "On-chip Peripheral Drivers"
                 default n
                 
             config BSP_USING_SPI3
-                bool "Enable SPI3 BUS"
+                bool "Enable SPI3 Bus"
                 default n
 
             config BSP_SPI3_TX_USING_DMA
@@ -312,7 +315,7 @@ menu "On-chip Peripheral Drivers"
         endif
 
     config BSP_USING_QSPI
-        bool "Enable QSPI BUS"
+        bool "Enable QSPI Bus"
         select RT_USING_QSPI
         select RT_USING_SPI
         default n
@@ -322,39 +325,52 @@ menu "On-chip Peripheral Drivers"
         default n
 
     menuconfig BSP_USING_I2C
-        bool "Enable I2C BUS"
+        bool "Enable I2C Bus"
         default n
         select RT_USING_I2C
         select RT_USING_I2C_BITOPS
         select RT_USING_PIN
         if BSP_USING_I2C
-            menuconfig BSP_USING_I2C3
-                bool "Enable I2C3 BUS (software simulation)"
-                default y
+            config BSP_USING_I2C1
+                bool "Enable I2C1 Bus (User I2C)"
+                default n
+                if BSP_USING_I2C1
+                    comment "Notice: PC7 --> 39; PC6 --> 38" 
+                    config BSP_I2C1_SCL_PIN
+                        int "i2c1 SCL pin number"
+                        range 1 176
+                        default 38
+                    config BSP_I2C1_SDA_PIN
+                        int "I2C1 SDA pin number"
+                        range 1 176
+                        default 39
+                endif
+
+            config BSP_USING_I2C3
+                bool "Enable I2C3 Bus (AP3216C/ICM20608/ES8388)"
+                default n
+
                 if BSP_USING_I2C3
-                    comment "Notice: PC0 --> 32; PC1 --> 33" 
+                    # Notice: PC0 --> 32; PC1 --> 33
                     config BSP_I2C3_SCL_PIN
-                        int "i2c3 scl pin number"
-                        range 1 176
+                        int
                         default 32
                     config BSP_I2C3_SDA_PIN
-                        int "I2C3 sda pin number"
-                        range 1 176
+                        int
                         default 33
                 endif
 
-            menuconfig BSP_USING_I2C4
-                bool "Enable I2C4 BUS (AHT10)"
+            config BSP_USING_I2C4
+                bool "Enable I2C4 Bus (AHT10)"
                 default n
+
                 if BSP_USING_I2C4
-                    comment "Notice: PC1 --> 33; PD6 --> 54" 
+                    # Notice: PC1 --> 33; PD6 --> 54
                     config BSP_I2C4_SCL_PIN
-                        int "i2c4 scl pin number"
-                        range 1 176
+                        int
                         default 54
                     config BSP_I2C4_SDA_PIN
-                        int "I2C4 sda pin number"
-                        range 1 176
+                        int
                         default 33
                 endif
         endif