Nios LCD Display

See Chapter 9 "Optrex 16207 LCD Controller Core":

http://www.altera.com/literature/ug/ug_embedded_ip.pdf

Cheers,

Dave

Thats written in datasheet ; " An Avalon Memory-Mapped (Avalon-MM) slave interface that provides access to 4 registers "

That Avalon Memory-Mapped (avalon MM) slave should be added in SOPC builder.

I did not put any avalon slave to my system while I am defining system.I just add following

*Nios CPU

*PIO

*Onchip Memory

*JTAG_UART

*Systemid

*LCD Dsiplay

So Is there anything that I forgot?

Do I need extra stuff to add in SOPC, for access LCD.

And in nios ,How can I initialize LCD , I can not find init function .

--- Quote Start ---

Do I need extra stuff to add in SOPC, for access LCD.

And in nios ,How can I initialize LCD , I can not find init function .

--- Quote End ---

The LCD component provides read/write access to the LCD registers. Those registers are described in the Optrex LCD manual. The LCD manual also describes the initialization sequence.

http://www.optrex.com/pdfs/dmcman_full.pdf

I have not used the SOPC LCD controller, so I don't know what software support they offer.

Cheers,

Dave

Dave thank you for reply , But I want to say that , I want to define System in SOPC builder ,

I just want to use pio's and lcd .

I tried pio's and acheived how ever now I want to try lcd ,

Is anyone tell me step by step.

And I want to write test code in NIOS.

--- Quote Start ---

I want to define System in SOPC builder ,

I just want to use pio's and lcd .

I tried pio's and acheived how ever now I want to try lcd ,

Is anyone tell me step by step.

And I want to write test code in NIOS.

--- Quote End ---

The steps are;

1) Define an SOPC system containing; NIOS II + PIO + LCD

2) Write code to access the PIO and LCD at the addresses defined by the SOPC system.

The values of the data you have to write to the LCD to first initialize it, and then create text on it, is described in the Optrex manual.

Cheers,

Dave

--- Quote Start ---

The steps are;

1) Define an SOPC system containing; NIOS II + PIO + LCD

2) Write code to access the PIO and LCD at the addresses defined by the SOPC system.

The values of the data you have to write to the LCD to first initialize it, and then create text on it, is described in the Optrex manual.

Cheers,

Dave

--- Quote End ---

and what should I add to system On chipMemory , JTAG and whatelse I need , Do I need to add avalon slave?

--- Quote Start ---

and what should I add to system On chipMemory , JTAG and whatelse I need

--- Quote End ---

If you want to use your processor, sure you need memory for it. Just follow one of the "My First NIOS" tutorials that Altera/Terasic provide with their kits.

--- Quote Start ---

Do I need to add avalon slave?

--- Quote End ---

PIO and LCD are Avalon slaves.

You need to take the time to go through the tutorials to understand what an SOPC or Qsys system design is.

Cheers,

Dave

Hi cesimkaol,

I have build a system with the following components:

clk_source, Nios II Processor, lcd_character, Pio for led; onchip_memory, jtag_uart and an DDR2. The DDR2 is not neccasary but you have to take a look at your on-chip memory size and the size of your C-Code.

You can find an example how to program a LCD from optrex in the following doc

DOT MATRIX CHARACTER LCD MODULE USER’S MANUAL from here:

www.optrex.com/siteimages/litcentral/dmcman_full.pdf.

In that doc is a description about the LCD registers and how to control tham. It help me a lot.

Be also aware that you have the right Pin Assignments for your LCD(see right here:

www.alteraforum.com/forum/showthread.php?t=4610&nojs=1&gsa_pos=4&wt.oss_r=1&wt.oss=lcd character)

If you don´t have it your display make crazy things.

I hope this hint will help you.

LCD_ON is pin L4 and when I create system , I use system on block diagram I added system and connect pins ,there is just LCD_EN,LCD_RW,LCD_RS pins , where is the LCD_ON pin and LCD_BLON pins,or pin L4 and K2 are directly assigned to system wwhile system generated , according to lcd mocule verilog code , also there is not input for LCD_ON and LCD_BLON , just examine below ...

//Legal Notice: (C)2011 Altera Corporation. All rights reserved. Your

//use of Altera Corporation's design tools, logic functions and other

//software and tools, and its AMPP partner logic functions, and any

//output files any of the foregoing (including device programming or

//simulation files), and any associated documentation or information are

//expressly subject to the terms and conditions of the Altera Program

//License Subscription Agreement or other applicable license agreement,

//including, without limitation, that your use is for the sole purpose

//of programming logic devices manufactured by Altera and sold by Altera

//or its authorized distributors. Please refer to the applicable

//agreement for further details.

// synthesis translate_off

`timescale 1ns / 1ps

// synthesis translate_on

// turn off superfluous verilog processor warnings

// altera message_level Level1

// altera message_off 10034 10035 10036 10037 10230 10240 10030

module lcd (

// inputs:

address,

begintransfer,

clk,

read,

reset_n,

write,

writedata,

// outputs:

LCD_E,

LCD_RS,

LCD_RW,

LCD_data,

readdata

)

;

output LCD_E;

output LCD_RS;

output LCD_RW;

inout [ 7: 0] LCD_data;

output [ 7: 0] readdata;

input [ 1: 0] address;

input begintransfer;

input clk;

input read;

input reset_n;

input write;

input [ 7: 0] writedata;

wire LCD_E;

wire LCD_RS;

wire LCD_RW;

wire [ 7: 0] LCD_data;

wire [ 7: 0] readdata;

assign LCD_RW = address[0];

assign LCD_RS = address[1];

assign LCD_E = read | write;

assign LCD_data = (address[0]) ? 8'bz : writedata;

assign readdata = LCD_data;

//control_slave, which is an e_avalon_slave

endmodule

//module generated by SOPC builder.

--- Quote Start ---

where is the LCD_ON pin and LCD_BLON pins

--- Quote End ---

These are board-specific (not all LCD interfaces need them). You can control them using a PIO component.

Cheers,

Dave