摘要
为解决实际中常利用的DSP的I/O口模拟并口的方法解决与该类液晶的并口通信兼容问题中存在的程序效率较低、占用端口硬件资源多且无法复用等问题,提出利用逻辑门电路或可编程逻辑器件编程实现XINTF接口产生与液晶并口匹配时序达到两者之间的兼容通信.通过逻辑分析仪观察改进后获得时序和所需时序的匹配程度以及DSP处理器与液晶并口的真实通信系统实现规定通信内容.实验结果证实了该方案的正确性、可行性和灵活性.
Low process efficiency,and more occupled port resources which can not be reused are problems in the compatible parallel communication. In order to solve the problems,I/O port of DSP is used to imitate parallel port. A logic gate circuit or a programmable logic device was pro posed to make XINTF interface compatible to LCD parallel port. By using the logic analyzer and DSP processor, the degree of the improved timing sequence and timing requirement is observed, and the compatible parallel communication system between XINTF interface of DSP and LCD parallel port can be implemented, the experiment results confirm the correctness, feasibility and flexibility of the program.
出处
《西安工程大学学报》
CAS
2016年第3期306-311,共6页
Journal of Xi’an Polytechnic University
基金
国家自然科学基金资助项目(61401347)
陕西省教育厅自然科学基金资助项目(14JK1303)
西安工程大学研究生创新基金资助项目(CHX2013052)
关键词
XINTF接口
DSP处理器
液晶并口
兼容通信
组合逻辑
时序
XINTF interface
DSP processor
LCDrs parallel port
compatible communication
combinational logic
timing sequence
