docs/zh_CN/api_reference/micropython/peripherals/api_gpio.md

# GPIO

中文 | [English](/en/api_reference/micropython/peripherals/api_gpio) | [日本語](/ja/api_reference/micropython/peripherals/api_gpio)

*使用Arduino库的GPIO API*

### <mark>digitalRead</mark>
> uint32 digitalRead(uint8 pin);

读取数字引脚电平值

| Param | Type | Description |
| --- | --- | --- |
| pin | <code>uint8</code> | 引脚编号 |

Return:
    电平值(0/1)

**例程**
```c++
uint32_t pin21_data;
pin21_data = digitalRead(21);
```
add "api reference" 2018-11-30 17:31:47 +08:00			`# GPIO`

add ja lcd api reference 2018-12-04 15:00:14 +08:00			`中文 \| [English](/en/api_reference/micropython/peripherals/api_gpio) \| [日本語](/ja/api_reference/micropython/peripherals/api_gpio)`

add "api reference" 2018-11-30 17:31:47 +08:00			`使用Arduino库的GPIO API`

			`### <mark>digitalRead</mark>`
			`> uint32 digitalRead(uint8 pin);`

			`读取数字引脚电平值`

			`\| Param \| Type \| Description \|`
			`\| --- \| --- \| --- \|`
			`\| pin \| <code>uint8</code> \| 引脚编号 \|`

			`Return:`
			`电平值(0/1)`

			`例程`
			```c++
			`uint32_t pin21_data;`
			`pin21_data = digitalRead(21);`
			```