Nios LCD Display

This is the main.c file of my project , please examine it , LCD still doesnt work ....I am screwed.. :((((

Do I have a problem with this "DALT_USE_LCD_16207" I did not add that.

/*

* "Small Hello World" example.

*

* This example prints 'Hello from Nios II' to the STDOUT stream. It runs on

* the Nios II 'standard', 'full_featured', 'fast', and 'low_cost' example

* designs. It requires a STDOUT device in your system's hardware.

*

* The purpose of this example is to demonstrate the smallest possible Hello

* World application, using the Nios II HAL library. The memory footprint

* of this hosted application is ~332 bytes by default using the standard

* reference design. For a more fully featured Hello World application

* example, see the example titled "Hello World".

*

* The memory footprint of this example has been reduced by making the

* following changes to the normal "Hello World" example.

* Check in the Nios II Software Developers Manual for a more complete

* description.

*

* In the SW Application project (small_hello_world):

*

* - In the C/C++ Build page

*

* - Set the Optimization Level to -Os

*

* In System Library project (small_hello_world_syslib):

* - In the C/C++ Build page

*

* - Set the Optimization Level to -Os

*

* - Define the preprocessor option ALT_NO_INSTRUCTION_EMULATION

* This removes software exception handling, which means that you cannot

* run code compiled for Nios II cpu with a hardware multiplier on a core

* without a the multiply unit. Check the Nios II Software Developers

* Manual for more details.

*

* - In the System Library page:

* - Set Periodic system timer and Timestamp timer to none

* This prevents the automatic inclusion of the timer driver.

*

* - Set Max file descriptors to 4

* This reduces the size of the file handle pool.

*

* - Check Main function does not exit

* - Uncheck Clean exit (flush buffers)

* This removes the unneeded call to exit when main returns, since it

* won't.

*

* - Check Don't use C++

* This builds without the C++ support code.

*

* - Check Small C library

* This uses a reduced functionality C library, which lacks

* support for buffering, file IO, floating point and getch(), etc.

* Check the Nios II Software Developers Manual for a complete list.

*

* - Check Reduced device drivers

* This uses reduced functionality drivers if they're available. For the

* standard design this means you get polled UART and JTAG UART drivers,

* no support for the LCD driver and you lose the ability to program

* CFI compliant flash devices.

*

* - Check Access device drivers directly

* This bypasses the device file system to access device drivers directly.

* This eliminates the space required for the device file system services.

* It also provides a HAL version of libc services that access the drivers

* directly, further reducing space. Only a limited number of libc

* functions are available in this configuration.

*

* - Use ALT versions of stdio routines:

*

* Function Description

* =============== =====================================

* alt_printf Only supports %s, %x, and %c ( < 1 Kbyte)

* alt_putstr Smaller overhead than puts with direct drivers

* Note this function doesn't add a newline.

* alt_putchar Smaller overhead than putchar with direct drivers

* alt_getchar Smaller overhead than getchar with direct drivers

*

*/

# include "sys/alt_stdio.h"

# include <unistd.h>

# include "system.h"

# include "altera_avalon_pio_regs.h"

# include <stdio.h>

# include "alt_types.h"

# include "altera_avalon_lcd_16207_regs.h"

# include "altera_avalon_lcd_16207.h"

# define LCD_WR_COMMAND_REG 0

# define LCD_WR_DATA_REG 2

void lcd_init(void);

void lcd_test(void);

int main()

{

alt_putstr("Hello from Nios II!\n");

usleep(15000); /* Wait for more than 15 ms before init */

lcd_init();

lcd_test();

while (1);

return 0;

}

void lcd_init(void)

{

/* Set function code four times -- 8-bit, 2 line, 5x7 mode */

IOWR_ALTERA_AVALON_LCD_16207_COMMAND(LCD_BASE,0x38);

usleep(4100); /* Wait for more than 4.1 ms */

IOWR_ALTERA_AVALON_LCD_16207_COMMAND(LCD_BASE,0x38);

usleep(100); /* Wait for more than 100 us */

IOWR_ALTERA_AVALON_LCD_16207_COMMAND(LCD_BASE,0x38);

usleep(5000); /* Wait for more than 100 us */

IOWR_ALTERA_AVALON_LCD_16207_COMMAND(LCD_BASE,0x38);

usleep(100); /* Wait for more than 100 us */

/* Set Display to OFF*/

IOWR_ALTERA_AVALON_LCD_16207_COMMAND(LCD_BASE,0x08);

usleep(100);

/* Set Display to ON */

IOWR_ALTERA_AVALON_LCD_16207_COMMAND(LCD_BASE,0x0C);

usleep(100);

/* Set Entry Mode -- Cursor increment, display doesn't shift */

IOWR_ALTERA_AVALON_LCD_16207_COMMAND(LCD_BASE,0x06);

usleep(100);

/* Set the Cursor to the home position */

IOWR_ALTERA_AVALON_LCD_16207_COMMAND(LCD_BASE,0x02);

usleep(2000);

/* Display clear */

IOWR_ALTERA_AVALON_LCD_16207_COMMAND(LCD_BASE,0x01);

usleep(2000);

}

void lcd_test(void)

{

int i;

char message[17] = "Hello World... ";

char done[15] = "Done! ";

/* Write a simple message on the first line. */

for(i = 0; i < 16; i++)

{

IOWR_ALTERA_AVALON_LCD_16207_DATA(LCD_BASE,message);

usleep(100);

}

/* count along the bottom row */

/* set address */

iowr_altera_avalon_lcd_16207_command(lcd_base,0xc0);

usleep(1000);

/* display count */

for (i = 0; i < 10; i++)

{

iowr_altera_avalon_lcd_16207_data(lcd_base,(char)(i+0x30) );

usleep(500000); /* wait 0.5 sec */

}

/* write "done!" message on first line. */

/* set address */

iowr_altera_avalon_lcd_16207_command(lcd_base,0x80);

usleep(1000);

/* write data */

for(i = 0; i < 14; i++)

{

iowr_altera_avalon_lcd_16207_data(lcd_base,done);

usleep(100);

}

}

Hello everybody,

i have a problem to get my LCD running at my DE0-Nano-board. The LCD module is a TM164AAA http://pdf.datasheetcatalog.net/datasheets2/36/361888_1.pdf (http://pdf.datasheetcatalog.net/datasheets2/36/361888_1.pdf)

I used Quartus and QSYS to add the LCD in the FPGA.

In nios 2 I tried different examplecodes but nothing worked. I would be very pleased if you could have a short look on my simple code/files.

I want to call the displayfunction in my mainfile. The files "display.h" , "display_1.h" and "display_2.h" are three different examplecodes.

Please find attached some screenshots of my system and the three display-files.

https://www.dropbox.com/s/q1yqr77xucjc0ld/hardware.jpg (https://www.dropbox.com/s/q1yqr77xucjc0ld/hardware.jpg)

https://www.dropbox.com/s/660jtbpz57tyr2x/qsys.jpg (https://www.dropbox.com/s/660jtbpz57tyr2x/qsys.jpg)

https://www.dropbox.com/s/iyfakq3nhugeyjt/system_h.jpg (https://www.dropbox.com/s/iyfakq3nhugeyjt/system_h.jpg)

Thank you very much. I'm a newbie. Just want to see some characters on my LCD-screen...