[stm32f072] support Arduino I2C and update readme (#5824)
[stm32f072] support Arduino I2C and update readme
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# STM32L072 Nucleo开发板的Arduino生态兼容说明
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## 1 RTduino - RT-Thread的Arduino生态兼容层
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STM32L072 Nucleo开发板已经完整适配了[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)。
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### 1.1 如何开启针对本BSP的Arduino生态兼容层
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Env 工具下敲入 menuconfig 命令,或者 RT-Thread Studio IDE 下选择 RT-Thread Settings:
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```Kconfig
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Hardware Drivers Config --->
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Onboard Peripheral Drivers --->
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[*] Support Arduino
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```
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## 2 Arduino引脚排布
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该BSP遵照Arduino UNO板的引脚排列方式。详见 `pins_arduino.c`
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| Arduino引脚编号 | STM32引脚编号 | 备注 |
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| --------------- | ------------- | ---------------------------------------------- |
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| 0 (D0) | -- | 该引脚在UNO板中为串口RX引脚,不能被当做普通IO |
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| 1 (D1) | -- | 该引脚在UNO板中为串口TX引脚,不能被当做普通IO |
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| 2 (D2) | PA10 | |
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| 3 (D3) | PB3 | PWM(定时器2发生) |
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| 4 (D4) | PB5 | |
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| 5 (D5) | PB4 | PWM(定时器3发生) |
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| 6 (D6) | PB10 | PWM(定时器2发生) |
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| 7 (D7) | PA8 | |
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| 8 (D8) | PA9 | |
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| 9 (D9) | PC7 | PWM(定时器3发生) |
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| 10 (D10) | PB6 | PWM反相位(定时器16发生) |
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| 11 (D11) | PA7 | PWM(定时器17发生) |
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| 12 (D12) | PA6 | |
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| 13 (D13) | PA5 | |
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| 14 (D14) | PC13 | 扩展:Nucleo板载用户按键(左侧蓝色) |
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| A0 | PA0 | ADC |
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| A1 | PA1 | ADC |
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| A2 | PA4 | ADC |
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| A3 | PB0 | ADC |
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| A4 | PC1 | ADC |
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| A5 | PC0 | ADC |
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| -- | PB9 | I2C1-SDA,被RT-Thread的I2C设备框架i2c1总线接管 |
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| -- | | I2C1_SCL,被RT-Thread的I2C设备框架i2c1总线接管 |
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> 注意:
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>
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> 1. D10引脚是PWM反相位引脚,这是由STM32设计决定的,例如正常的PWM设定占空比是20%,它就是20%。但是对于D10引脚,设定占空比是20%,实际输出的占空比是80%。
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> 2. 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。
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> 3. USART2是Nucleo板的默认串口,理论应对接到了Arduino引脚编号的D0和D1,但是其实际用于串口通信,因此不允许当做普通IO来使用和操作。如果需要将D0、D1与STM32 USART2的引脚相连,需要手动焊接锡桥SB62、SB63。
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> 4. Nucleo板的Arduino接口中AVDD(即AREF)默认是与VDD相连的,如果需要扩展板提供外部参考电压,需要将SB57锡桥挑开。
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## 3 I2C总线
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STM32F072 Nucleo板的I2C总线是板上丝印的 `SCL/D15` 和 `SDA/D14` 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。
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@ -34,8 +34,7 @@ const pin_map_t pin_map_table[]=
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{D11, GET_PIN(A,7), "pwm17", 1}, /* PWM */
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{D12, GET_PIN(A,6)},
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{D13, GET_PIN(A,5)},
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{D14, GET_PIN(B,9)},
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{D15, GET_PIN(B,8)},
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{D14, GET_PIN(C,13)}, /* user button */
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{A0, GET_PIN(A,0), "adc1", 0}, /* ADC */
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{A1, GET_PIN(A,1), "adc1", 1}, /* ADC */
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{A2, GET_PIN(A,4), "adc1", 4}, /* ADC */
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@ -27,13 +27,12 @@
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#define D12 (12)
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#define D13 (13)
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#define D14 (14)
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#define D15 (15)
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#define A0 (16)
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#define A1 (17)
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#define A2 (18)
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#define A3 (19)
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#define A4 (20)
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#define A5 (21)
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#define A0 (15)
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#define A1 (16)
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#define A2 (17)
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#define A3 (18)
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#define A4 (19)
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#define A5 (20)
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#define LED_BUILTIN D13 /* Default Built-in LED */
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@ -31,7 +31,11 @@ menu "Onboard Peripheral Drivers"
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select BSP_USING_PWM16_CH1
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select BSP_USING_PWM17
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select BSP_USING_PWM17_CH1
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select BSP_USING_I2C
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select BSP_USING_I2C1
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imply RTDUINO_USING_SERVO
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imply RTDUINO_USING_WIRE
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imply RTDUINO_USING_ADAFRUIT
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default n
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endmenu
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@ -136,7 +140,20 @@ menu "On-chip Peripheral Drivers"
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select RT_USING_PIN
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if BSP_USING_I2C
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config BSP_USING_I2C1
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bool "Enable I2C1 Bus (User I2C)"
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default n
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if BSP_USING_I2C1
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comment "Notice: PB9 --> 25; PB8 --> 24"
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config BSP_I2C1_SCL_PIN
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int "i2c1 SCL pin number"
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range 1 176
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default 24
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config BSP_I2C1_SDA_PIN
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int "i2c1 SDA pin number"
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range 1 176
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default 25
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endif
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endif
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source "../libraries/HAL_Drivers/Kconfig"
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@ -16,47 +16,50 @@ Hardware Drivers Config --->
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## 2 Arduino引脚排布
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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。
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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。详见 `pins_arduino.c`
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### 2.1 Arduino引脚排布
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### 2.1 Arduino引脚排布统览
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详见 `pins_arduino.c`
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| Arduino引脚编号 | STM32引脚编号 | 备注 |
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| --------------------- | ------------- | ---------------------------------------------- |
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| 0 (D0) | -- | 该引脚在UNO板中为串口RX引脚,不能被当做普通IO |
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| 1 (D1) | -- | 该引脚在UNO板中为串口TX引脚,不能被当做普通IO |
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| 2 (D2) | PB9 | 普通IO |
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| 3 (D3) | PD15 | PWM(定时器4发生) |
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| 4 (D4) | PA8 | 普通IO |
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| 5 (D5) | PD14 | 普通IO |
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| 6 (D6) | PB11 | PWM(定时器2发生) |
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| 7 (D7) | PB14 | 普通IO |
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| 8 (D8) | PB12 | 普通IO |
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| 9 (D9) | PD12 | PWM(定时器4发生) |
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| 10 (D10) | PB10 | PWM(定时器2发生) |
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| 11 (D11) | PB8 | PWM(定时器4发生) |
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| 12 (D12) | PB15 | 普通IO |
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| 13 (D13) | PB13 | 普通IO |
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| 14 (D14) | PA1 | 振动电机-A |
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| 15 (D15) | PA0 | 振动电机-B |
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| 16 (D16) | PB2 | 蜂鸣器 |
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| 17 (D17) | PD10 | KEY0 |
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| 18 (D18) | PD9 | KEY1 |
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| 19 (D19) | PD8 | KEY2 |
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| 20 (D20) | PC13 | KEY-WKUP |
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| 21 (D21) | PE7 | 红色LED |
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| 22 (D22, LED_BUILTIN) | PE8 | 绿色LED,Arduino默认LED |
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| 23 (D23) | PE9 | 蓝色LED,具有PWM功能(定时器1发生) |
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| 24 (D24) | PB0 | 红外发送 |
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| 25 (D25) | PB1 | 红外接收 |
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| A0 | PC2 | ADC |
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| A1 | PC4 | ADC |
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| A2 | -- | 芯片内部参考电压 ADC |
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| A3 | -- | 芯片内部温度 ADC |
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| DAC0 | PA4 | 真模拟输出 DAC |
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| -- | PC7 | I2C1-SDA,被RT-Thread的I2C设备框架i2c1总线接管 |
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| -- | PC6 | I2C1-SCL,被RT-Thread的I2C设备框架i2c1总线接管 |
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| Arduino引脚编号 | STM32引脚编号 | 备注 |
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| --------------------- | ------------- | --------------------------------------------------------- |
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| 0 (D0) | -- | 该引脚在UNO板中为串口RX引脚,不能被使用 |
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| 1 (D1) | -- | 该引脚在UNO板中为串口TX引脚,不能被使用 |
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| 2 (D2) | PB9 | 普通IO |
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| 3 (D3) | PD15 | PWM |
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| 4 (D4) | PA8 | 普通IO |
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| 5 (D5) | PD14 | 普通IO |
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| 6 (D6) | PB11 | PWM |
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| 7 (D7) | PB14 | 普通IO |
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| 8 (D8) | PB12 | 普通IO |
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| 9 (D9) | PD12 | PWM |
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| 10 (D10) | PB10 | PWM |
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| 11 (D11) | PB8 | PWM |
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| 12 (D12) | PB15 | 普通IO |
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| 13 (D13) | PB13 | 普通IO |
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| 14 (D14) | PA1 | 振动电机-A |
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| 15 (D15) | PA0 | 振动电机-B |
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| 16 (D16) | PB2 | 蜂鸣器 |
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| 17 (D17) | PD10 | KEY0 |
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| 18 (D18) | PD9 | KEY1 |
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| 19 (D19) | PD8 | KEY2 |
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| 20 (D20) | PC13 | KEY-WKUP |
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| 21 (D21) | PE7 | 红色LED |
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| 22 (D22, LED_BUILTIN) | PE8 | 绿色LED,Arduino默认LED |
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| 23 (D23) | PE9 | 蓝色LED,具有PWM功能 |
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| 24 (D24) | PB0 | 红外发送 |
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| 25 (D25) | PB1 | 红外接收 |
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| A0 | PC2 | ADC |
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| A1 | PC4 | ADC |
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| A2 | -- | 芯片内部参考电压 ADC |
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| A3 | -- | 芯片内部温度 ADC |
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| A4 | PC7 | I2C-SDA,被RT-Thread的I2C设备框架i2c1总线接管,无模拟功能 |
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| A5 | PC6 | I2C-SCL,被RT-Thread的I2C设备框架i2c1总线接管,无模拟功能 |
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| DAC0 | PA4 | 真模拟输出 DAC |
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> 注意:
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>
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> 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。
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> 2. USART1是潘多拉板的默认串口,理论应对接到了Arduino引脚编号的D0和D1,但是其实际用于串口通信,因此不允许当做普通IO来使用和操作。
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### 2.2 板载排针的Arduino引脚排布
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@ -97,11 +100,7 @@ Hardware Drivers Config --->
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- 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
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- i2c4 为板载 I2C 外设总线,连接板载 AHT10(温湿度传感器) 芯片
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> 注意:
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>
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> 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。
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>
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> 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。
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I2C的引脚都是被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。
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## 4 特殊功能说明
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@ -341,7 +341,7 @@ menu "On-chip Peripheral Drivers"
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range 1 176
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default 38
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config BSP_I2C1_SDA_PIN
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int "I2C1 SDA pin number"
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int "i2c1 SDA pin number"
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range 1 176
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default 39
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endif
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