![]() ![]() Generating custom characters on LCD is not very hard. When we send data to LCD it goes to the data register and is processed there. The data is the ASCII value of the character to be displayed on the LCD. Processing for commands happens in the command register.ĭata Register: The data register stores the data to be displayed on the LCD. A command is an instruction given to LCD to do a predefined task. RS=0 for command register, whereas RS=1 for data register.Ĭommand Register: The command register stores the command instructions given to the LCD. The register select is used to switch from one register to other. After this we again make it ground that is, en=0.Ī 16X2 LCD has two registers, namely, command and data. Usually, we set en=0, when we want to execute the instruction we make it high en=1 for some milliseconds. Sends data to data pins when a high to low pulse is given Extra voltage push is required to execute the instruction and EN(enable) signal is used for this purpose. Low to write to the register High to read from the register ![]() Selects command register when low, and data register when high Rotate the potentiometer knob forward and backwards to adjust the LCD contrast. The output of the potentiometer is connected to this pin. Contrast adjustment the best way is to use a variable resistor such as a potentiometer. ![]()
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