Firstly the paper presents the main features of TMS320F240 DSP and principle and application of SED1335 LCD controller,then discusses the hardware interface design scheme about using digital I/O ports to simulate time sequence between DSP and LCD,and gives the specific software implementation method. This means ultimately realizes good interface between DSP and LCD controller SED1335 and achieves success in the practical system application.
The characteristic of SED1335 LCD controller is introduced in this paper, and combining need of economic NC system, the hardware interface of SED1335 LCD controller and 89C52 single-chip computer are shown in detail. At last, the correlative software design is also introduced in CNC system.
Hardware structure of the SED1335 controller in display of liquid crys tal and the interface of SED1335 and 89C58 chip microprocessors were introduced. The method of interface in time order specific property and software design wer e put forward. The reality application in series products of analysis analyses i nstrument in petroleum chemical have been carried out.