CGRAM1602 can store 8 custom characters. The first addresses of the storage space of these 8 custom characters are:
0X40,0X48,0X50,0X58,0X60,0X68,0X70,0X78. Let's take Ox40 as an example, its storage space is as shown in the figure below:
If 5*7 characters are used, then the leftmost 3 bits and the last line of data are actually useless, usually set to 0. If you want to customize a C symbol, then fill in the box first, as shown in the figure (red 1 white 0)
Fill these codes into CGRAM before use
