基于STM32遥控数字音量功放系统设计  

Design of remote digital volume amplification system based on STM32

作　　者：陈志丹[1] 郝卫东[1] 闫伟[1] 邓子信[1] 李君[1] 徐彪[1] 

机构地区：[1]桂林电子科技大学机电工程学院,广西桂林541004

出　　处：《微型机与应用》2014年第4期20-22,25,共4页Microcomputer & Its Applications

摘　　要：在红外遥控设备的使用中,设备的稳定性和调节平滑性是最基本而最重要的指标。根据NEC红外协议,设计了一种基于STM32F103C8单片机的红外可调的功放系统。此系统通过STM32F103C8的输入端口捕获红外遥控器发射的脉冲信号,用其强大的定时器对遥控编码进行解码,判断出哪个功能键被按下,根据所按下的功能键驱动单片机的GPIO口输出控制信号来调节数控电位器X9313,实现功放输入电压的调节,从而平滑地调节音量的增加和减少。通过测试,功放系统可通过红外遥控器进行有效的、平滑稳定的音量调节。In the use of infrared remote control equipment, equipment stability and regulation smoothness are the most basic and the most important index. According to the NEC protocol, an infrared and adjustable amplifier system based on STM32F103C8 is designed. This system captures the pulse signal of infrared remote control transmitter through the STM32F103C8 input port, and its powerful timer is used to decrypt remote control code, determining which judgment function keys is pressed. Function keys are pressed to drive SCM GPIO port to output control signal to adjust digital potentiometer X9313. The power amplifier input voltage is adjusted effectually, so that the increase and decrease of the volume are adjusted smoothly. The tests show that power amplifier system can adjust the volume effectively and smooth through the infrared remote controller.

关 键 词：STM32F103C8 红外 X9313 PAM8403 

分 类 号：TP368.2[自动化与计算机技术—计算机系统结构]