Design and implementation of auto intelligent air controller

This article describes the design of intelligent control system for air conditioning. Proposed the processing algorithms of the key controlling and the power Fail Safeguard; Design the key priority encoder and the encoder interrupt and status with the programmable logic device, it solved the problem of resource shortage of the microcontroller. Proposed the processing algorithms of the control of steering, it solved the problem of critical resource and plug events. Simulate I²C bus protocol and SPI bus protocol for data transfer. Simulate the PWM wave for the control of DC motor´s speed with the timer. Use the mechanism of interrupt and the way of parallel processing to improve the system´s processing speed. It provides a simple interactive interface for users. It can set temperature, wind direction and speed, and comes with a key intelligence operations, intelligent power-down protection, and smart reset.