> For the complete documentation index, see [llms.txt](https://freeioe.gitbook.io/doc/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://freeioe.gitbook.io/doc/reference/other/utils/gpios.md).

# gpios模块

***

## 控制设备的GPIO

用以帮助应用控制设备GPIO的输出。

### value

设定GPIO的电平状态（value为nil时，获取当前电平状态信息)

```lua
function led:value(value)
end
```

### toggle

切换输出状态，如果当前状态为高电平状态，则切换到低电平状态

```lua
function led:toggle()
end
```

### blink

设定GPIO进入闪烁切换状态。 sec是GPIO高电平时长(浮点数), dark\_sec是GPIO低电平时长。 闪烁会一直执行到取消闪烁

```lua
function led:blink(sec, dark_sec)
end
```

### cancel\_blink

取消GPIO电平闪烁状态

```lua
function led:cancel_blink()
end
```

### 使用示例

```lua
local gpios = require 'utils.gpios'

local pcie_reset = leds.pcie_reset --- 使用名称为pcie_reset的GPIO, /sys/class/gpio下的名称为pcie_reset的GPIO。

pcie_reset:value(1) -- 高电平
pcie_reset:value(0) -- 低电平

pcie_reset:blink(1, 1) -- 闪烁
```


---

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