ra8806 RAIO Technology Inc., ra8806 Datasheet - Page 88

• Manufacturer Part Number: ra8806
• Description: Two Layers Character/graphic Lcd Controller
• Manufacturer: RAIO Technology Inc.

Preliminary Version 1.2
RAiO
TECHNOLOGY INC.
6-11-2 Create Font in DDRAM
Program Example(2):
The DDRAM are 9.6KByte RAM, so it could create 600 Half-Size or 300 Full-Size characters. Table
6-35 is the font code mapping table in DDRAM for Half-Size characters. Table 6-36 is the font code
mapping table in DDRAM for Full –Size characters. These font codes were also fix in RA8806. The
register CURX and CURY are used to point the address that bit-map data to create font.
According to the register setting of user-created font in DDRAM, please refer to the below table.
MAMR
CURX
CURY
Reg.
// Create a half-size font in CGRAM and show on the screen.
// font_data[] = {00, 82, 44, 28, FE, 10, 10, 10, FE, 10, 10, 38, 54, 92, 10, 00}
Access_DDRAM1();
LCD_Text();
LCD_DataWrite( 0x05 );
Access_CGRAM();
Only_Show_DDRAM1();
LCD_CmdWrite( CURY );
LCD_DataWrite( 0x02 );
LCD_CmdWrite( CURX );
LCD_DataWrite( 0x10 );
LCD_CmdWrite( MWCR);
for( i = 0; i < 16; i++ )
LCD_GotoXY( 5 , 5 );
LCD_CmdWrite( MWCR);
LCD_DataWrite( 0x8F );
{
}
Delay2us(50);
LCD_DataWrite( font_data[i] );
Table 6-34 : Register Definition for Created-font in DDRAM
Bit_Num
Bit [6:4]
Bit [1:0]
Bit [5:0]
Bit [7:0]
Bit 7
Cursor Increase enable
Display mode
Select memory for write cycle
Both registers are Indicate which font
code data will be created.
Description
88/184
// Show as (2) of Figure 6-53
// MAMR[1:0] = 00b
// MAMR[6:4] = 001b
// Create 6
// Write font-data from 1
// B0h, Memory write command
// 16 continuous write for font bit-map
// Set Cursor position ( 5 , 5 )
// Corresponding font code( 8F05h )
Two Layers Character/Graphic LCD Controller
th
half-size char
st
REG[12h]
REG[60h]
REG[70h]
Reference
byte
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RA8806