外设 API
- Analog to Digital Converter (ADC) Oneshot Mode Driver
 - Analog to Digital Converter (ADC) Continuous Mode Driver
 - Analog to Digital Converter (ADC) Calibration Driver
 - Clock Tree
 - Digital To Analog Converter (DAC)
 - GPIO & RTC GPIO
 - 通用定时器
 - 专用 GPIO
 - Hash-based Message Authentication Code (HMAC)
 - Digital Signature (DS)
 - I2C 驱动程序
 - I2S
 - LCD
 - LED PWM 控制器
 - 脉冲计数器 (PCNT)
 - 红外遥控 (RMT)
 - SD SPI Host Driver
 - Sigma-Delta Modulation (SDM)
 - SPI Master Driver
 - SPI 从机驱动程序
 - SPI Slave Half Duplex
 - Temperature Sensor
 - 触摸传感器
 - Touch Element
 - Two-Wire Automotive Interface (TWAI)
 - Universal Asynchronous Receiver/Transmitter (UART)
 - USB Device Driver
 - USB Host
 
本部分的 API 示例代码存放在 ESP-IDF 示例项目的 peripherals 目录下。