23 lines
967 B
Markdown
23 lines
967 B
Markdown
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# IoT Hardware<a name="EN-US_TOPIC_0000001117425053"></a>
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- [Introduction](#section11660541593)
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- [Directory Structure](#section1464106163817)
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- [Constraints](#section1718733212019)
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## Introduction<a name="section11660541593"></a>
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The Internet of Things \(IoT\) hardware subsystem provides APIs for operating IoT devices, including flash, general-purpose input/output \(GPIO\), Inter-Integrated Circuit \(I2C\), pulse width modulation \(PWM\), universal asynchronous receiver-transmitter \(UART\), and watchdog APIs.
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## Directory Structure<a name="section1464106163817"></a>
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```
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/base/iothardware/peripheral
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├── interfaces
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└── inner_api # APIs for operating IoT devices
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```
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## Constraints<a name="section1718733212019"></a>
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The IoT hardware subsystem is compiled using the C language. Currently, only the Hi3861 development board is supported. If you want to use other chips, you need to implement OpenHarmony APIs.
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