基于FPGA的高速DSP与液晶模块接口的实现

Implementation of Interface Between High-speed DSP and LCD Based on FPGA

介绍了一种基于TMS320VC5402 DSP&FPGA在液晶模块中的设计。针对高速DSP与LCD读写数据过程中时序的不匹配,提出了一种基于FPGA的解决方法。给出了快速器件DSP和慢速器件液晶模块的接口方法,并做出了逻辑时序分析;介绍了TMS320VC5402 DSP与液晶模块通过FPGA接口的硬件和软件实例,并给出了部分程序代码。利用FPGA进行I/O口的扩展,克服了DSP I/O口功能弱的缺点,提高了DSP的控制能力,节省了DSP的I/O资源。实验表明,该系统具有可靠性高的优点。

A kind of design based on TMS320VC5402 DSP＆FPGA and LCD is introduced. In order to solve the mismatch between high-speed DSP and time schedule requirement of LCD, the author puts forward a method based on FPGA. It applies the method of interface between high-speed device DSP and slow-speed device LCD, gives logictiming analysis. Meanwhile＇ it produces the example that the TMS320VC5402 DSP integrated with LCD through using FPGA successfully by hardware and software. And it gives part of the program-code. By using FPGA to expand the I/O interface ,the weakness of DSP I/O interface function is improved, the capacity of DSP control is enhanced and the resource of I/O is saved. The experiments show that the system is reliable.