作　　者： ;

机构地区： 广州科技贸易职业学院

出　　处： 《通信技术》 2010年第7期193-194,197,共3页

摘　　要： 为了实现用CPLD器件解码红外遥控信号。在分析CX6122芯片红外遥控编码原理基础上,提出用VHDL语言有限状态机设计红外遥控解码电路。用延时电路和状态机S1、S2、S3检测红外接收器输出的电平信号来识别遥控引导码,用S4、S5判断遥控脉冲位置调制方式(PPM)编码的0.56ms脉宽的开始和结束,在S6下延时0.84ms,再经S7判断输入电平的状态解出二进制码,然后状态机进入数据移位和输出状态。该电路在EPM3128ATC100器件验证通过,解码准确,稳定性好。 This paper,based on analysis of CX6122 chip for infrared remote-control signal code,proposes a design of infrared remote-control decode circuit by using the VHDL finite state machine,thus to realize the decoding of infrared remote-control signal with CPLD.With the delay circuit and state machines S1,S2,and S3 detecting infrared receiver output signal and identifying the boot code,and S4 and S5 determining the start and end PPM remotely-encoded 0.56ms pulse width,and with a delay of 0.84ms in the S6,and then with S7 determining input level and finding the solution of binary code,the state machine gets into the data shift and output status.The experiment by the EPM3128 ATC100 device indicates that the circuit is accurate in decoding and excellent in stability.

关 键 词： 遥控器解码 状态机

领　　域： [电子电信] [电子电信] [电子电信]