The AT32F421 Firmware Library is a firmware package which contains the device drivers for all of the peripherals for AT32F421.

This library provides a set of examples for each peripheral and some application such as the IAP and sLib utilities.

The mamual is structured as follows:

• AT32F421_periph_driver : device drivers
• AT32F421_periph_examples : examples for AT32F421
• AT32F421_periph_template : AT32F421 project template for Keil and IAR IDE tools
• AT32F421_board : AT-START-F421 board setting functions
• AT32F421_middlewares_i2c_application_library : middlewares for I2C application
• UTILITIES_examples : some applications such as FreeRTOS, sLib and IAP.