LED project to encourage lcd display investment and improve business innovation

LED enterprises pay attention to you, if the major industrial projects, research and development of key technologies and common technologies research, development of major new products and technology, public platform construction (including e-commerce platform, logistics platforms, etc.) so there are a, then it Come to declare Jiangmen LED industry development special fund it. Declaration from the 17th began.LED project to encourage investment and improve business innovation, build their 7 TFT display module own brands, bigger and stronger LED industry, Jiangmen City, set up a special LED industry development funds. On capital investment, focus on LED packaging applications and core aspects of industrial development, promote the industrialization of independent innovation, intellectual property rights and cultivate independent brands; around the industrial chain display lcd 16x2 promoting the Guangdong Province of strategic emerging industries (Jiangmen green light) bases . On the support range, focusing on the LED industry service platform, LED packaging applications (lighting) industrial, LED industrial packaging applications, LED packaging applications supporting materials industry and other projects. In addition, arrange special funds to introduce competition to take the competitive assessment, to achieve "more than in selected, well selected excellent."

It plays an important role lcd display in the rotating buffer memory

 Two types of motor failure by rotating crane crane pictures, directional control valves, brake valve, relief valve, overload, find fault, it needs to investigate the hydraulic system diagram gradual effect of combining different parts. Examination found that Lcd display modules the rotating motor is working properly, no abnormal sound or heat, can be reversed, analysts believe that is good. When the rotary directional control valve, the pressure valve is a check valve to the left to the right side of the rotating motor through the opening stroke, the left and right side is normal. Check the pressure gauge, the working pressure is normal  work and no vibration and noise, so that normal rotary valve. Brake brake, parking Serial display modules can be stopped, brake, and has nothing to do brake. In the inspection found no problems, and finally check the battery. It plays an important role in the rotating buffer memory. Cranes and hydraulic accumulators and batteries, has two main functions, the first time the engine is running at high speed within a short period of time, the energy storage device, thereby reducing the number of hydraulic pumps, saving engine power.

lcd display the system requires additional configuration

 a highly integrated mixed-signal system-on-chip. It has a 100-pin TQFP package, low power supply voltage of 2.7 ~ 3.3 V, all I / O, RST, JTAG pins are resistant to 5 V voltage; has high speed pipelined 8051-compatible CIP51 core structure (up to 25 MIPS). The MCU has a total of 64 P0 ~ P7 purpose I / O ports, each port pin can be configured as push-pull output or open-drain output. For VGS12864E, due to its operating voltage is 5 V, and C8051F020 operating voltage is 3.3 V, so Character LCD Modules the output C8051F020 better able to drive 5 V input OLED, the system requires lcd display additional configuration. In addition to the corresponding output port is set to "open drain", but also in the circuit will be connected to each port through a pull-up resistor on a 5 V power supply, so you can ensure C8051F020 logic "1" output can be raised to 5 V. The interface circuit shown in Figure 2.
4 software programming
Software programming language using Keil C51 driver includes a display module hardware (ie write commands and write data), and clear screen display module initialization routines as Serial display modules well as other common Western character display realization process. Since this command system and LCD module drive controller HD61202 compatible, so these lcd display procedures have a high versatility. For character character display, character features of the module library data is prepared in the form of columns of data that a byte of data represents the data of an 8 × 1, and compared with the usual character library, the character is rotated by 90 ° font data. Use Zimo21.exe take matrix software, and set the mode to portrait modulo extraction, you can easily obtain the necessary Western text mode.

the state is set to lcd display show the first two instructions

Instruction modules and LCD driver HD61202 compatible controller, a total of seven instructions. Not described in detail here, as listed in Table 2 only instruction list. Among them, the state is set to show the first two instructions, the rest of the Lcd modules class to read and write commands.VGS12864E interface connection in two ways: one is the direct access mode, the other is indirect access. Either lcd display way you want to access the module must first read the contents of the status register to determine the "busy" flag can be accessed when not busy. Direct access method is a module interface as a memory or I / O devices directly linked to the MCU bus, MCU to access memory or I / O device Serial display modules  the module operation. Indirect access MCU module is operated via software simulation control timing.Write instructions on the display module and write data write operation into the left screen and write the right screen. The difference between writing about half the screen is only set corresponding chip select signals, and the difference between writing instruction and writing data when the write data is set RS register select signal. Initialization operation is completed and opened to determine the display position of the display.