LCD interfacing with FPGA using SPI

[Sam Cristtina]

Hello sir,
I'm new in verilog.
I want to displaying character on LCD.
I have done in C language using controller. Now i want to move displaying function on FPGA.
Can any one help me for displaying character on LCD with verilog using SPI?

My code is given in attechment. from attechment u think that i'm new in verilog..

In c language
For writing 'A' on lcd, I transmitting 0x0c41 and 0x0d00.

0x0c00 and 0x0d00 used for EN and reset. SO i transmitting this as DATA in SPI.

can any one help me for doing this using FPGA with verilog code?

Thanks,

 

[bhav]

First initialize the LCD display then clear it and come to first line and character.
Send your character with increment in position value

 

[ravics]

You need to follow the initialization sequence for your LCD interface. Timing has to be followed according to datasheet's timing diagram for LCD Enable, Register Select, Read Write & Data bits. You may use a state machine running on SPI clock.

After initialization sequence data can be sent to LCD.

Below is an example init seq for 4-bit LCD interface

--The initialization sequence first establishes that the FPGA application wishes to use the
--four-bit data interface to the LCD as follows:
--1. Wait 15 ms or longer, although the display is generally ready when the FPGA finishes
--configuration. The 15 ms interval is 750,000 clock cycles at 50 MHz.
--2. Write LCD_DB<7:4> = 0x3, and pulse LCD_E High for 12 clock cycles.
--3. Wait 4.1 ms or longer, which is 205,000 clock cycles at 50 MHz.
--4. Write LCD_DB<7:4> = 0x3, and pulse LCD_E High for 12 clock cycles.
--5. Wait 100 ?s or longer, which is 5,000 clock cycles at 50 MHz.
--6. Write LCD_DB<7:4> = 0x3, and pulse LCD_E High for 12 clock cycles.
--7. Wait 40 ?s or longer, which is 2,000 clock cycles at 50 MHz.
--8. Write LCD_DB<7:4> = 0x2, and pulse LCD_E High for 12 clock
--9. Wait 40 ?s or longer, which is 2,000 clock cycles at 50 MHz.

Hope this helps

 

[Sam Cristtina]

I have done this all using C language with controller and i also display character using controller so I know about command and data. but now i want to move my Graphics LCD fuction on FPGA in verilog code.
is it possible to make a constant array from which i locate hex value for displaying character in verilog?