DE2 LCD display

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I'm trying to debug a code I've written, but I'm having trouble figuring out the values of some of my parameters while using the Altera Debug Client. I'm using the Altera DE2 board and I was hoping to display some results on the LCD screen 

I found in verilog this command: DE2LCDDriver(parameter)  How would i convert that to C or C++??  Thanks!

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does anyone have a copy of this library? 

alt_up_character_lcd.h

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#ifndef __ALTERA_UP_AVALON_CHARACTER_LCD_H__ 

# define __ALTERA_UP_AVALON_CHARACTER_LCD_H__  # include <stddef.h>  # include "sys/alt_dev.h" # include "sys/alt_alarm.h" # include "sys/alt_warning.h"  # ifdef __cplusplus extern "C" { # endif /* __cplusplus */  /*  * Device structure definition. Each instance of the driver uses one  * of these structures to hold its associated state.  */ typedef struct alt_up_character_lcd_dev {  /// @brief character mode device structure   /// @sa Developing Device Drivers for the HAL in Nios II Software Developer's Handbook  alt_dev dev;  /// @brief the base address of the device  unsigned int base; } alt_up_character_lcd_dev;  // system functions /**  * @brief Initialize the LCD by clearing its display  *  * @param lcd -- struct for the LCD Controller device   *  **/ void alt_up_character_lcd_init(alt_up_character_lcd_dev *lcd);  // file-like operation functions int alt_up_character_lcd_write_fd(alt_fd *fd, const char *ptr, unsigned int len);  // direct operation functions /**  * @brief Open the character LCD device specified by <em> name </em>  *  * @param name -- the character LCD name. For example, if the character LCD name in SOPC Builder is "character_lcd_0", then <em> name </em> should be "/dev/character_lcd_0"  *  * @return The corresponding device structure, or NULL if the device is not found  **/ alt_up_character_lcd_dev* alt_up_character_lcd_open_dev(const char* name);  /**  * @brief Write the characters in the buffer pointed to by <em> ptr </em> to  * the LCD, starting from where the current cursor points to   *  * @param lcd -- struct for the LCD Controller device   * @param ptr -- the pointer to the char buffer  * @param len -- the length of the char buffer  *  * @return 0 for success  **/ int alt_up_character_lcd_write(alt_up_character_lcd_dev *lcd, const char *ptr, unsigned int len);  /**  * @brief Set the cursor position  *  * @param lcd -- struct for the LCD Controller device   * @param x_pos -- x coordinate ( 0 to 15, from left to right )  * @param y_pos -- y coordinate ( 1 for the first row, 2 for the second row )  *  * @return 0 for success  **/ int alt_up_character_lcd_set_cursor_pos(alt_up_character_lcd_dev *lcd, unsigned x_pos, unsigned y_pos);  /**  * @brief Shift the cursor to left or right  *  * @param lcd -- struct for the LCD Controller device   * @param x_right_shift_offset -- the number of spaces to shift to the right. If the offset is  * negative, then the cursor shifts to the left.  *  * @return 0 for success  **/ int alt_up_character_lcd_shift_cursor(alt_up_character_lcd_dev *lcd, int x_right_shift_offset);  /**  * @brief Shift the entire display to left or right  *  * @param lcd -- struct for the LCD Controller device   * @param x_right_shift_offset -- the number of spaces to shift to the right. If the offset is  * negative, then the display shifts to the left.  *  * @return 0 for success  **/ int alt_up_character_lcd_shift_display(alt_up_character_lcd_dev *lcd, int x_right_shift_offset);  /**  * @brief Erase the character at the specified coordinate   *  * @param lcd -- struct for the LCD Controller device   * @param x_pos -- x coordinate ( 0 to 15, from left to right )  * @param y_pos -- y coordinate ( 1 for the first row, 2 for the second row )  *  * @return 0 for success  **/ int alt_up_character_lcd_erase_pos(alt_up_character_lcd_dev *lcd, unsigned x_pos, unsigned y_pos);  /*  * Macros used by alt_sys_init   */ # define ALTERA_UP_AVALON_CHARACTER_LCD_INSTANCE(name, device)   static alt_up_character_lcd_dev device =   {   {   ALT_LLIST_ENTRY,   name##_NAME,   NULL, /* open */   NULL, /* close */   NULL, /* read */   alt_up_character_lcd_write_fd,   NULL, /* lseek */   NULL, /* fstat */   NULL, /* ioctl */   },   name##_BASE,   }  # define ALTERA_UP_AVALON_CHARACTER_LCD_INIT(name, device)   {   alt_up_character_lcd_init(&device);   alt_dev_reg(&device.dev);   }   # ifdef __cplusplus } # endif /* __cplusplus */  # endif /* __ALTERA_UP_AVALON_CHARACTER_LCD_H__ */

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Hope The Above Helps....

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Here I am posting some very rudimentary code that shows one way to drive the LCD display in the DE2 (very rudimentary code ....) 

 # include <stdio.h># include <unistd.h># include "system.h"# include "DE2_pio_regs.h"# include "altera_up_avalon_character_lcd.h"  int main() {  int in, out;  alt_up_character_lcd_dev * lcd;  int len;    len =15;  lcd = alt_up_character_lcd_open_dev(CHARACTER_LCD_0_NAME ); // i 've found CHARACTER_LCD_0_NAME in the system.h file   alt_up_character_lcd_set_cursor_pos(lcd, 0, 1);  alt_up_character_lcd_write(lcd, "SOO REALLY COOL", len);  alt_up_character_lcd_set_cursor_pos (lcd, 0, 2);  alt_up_character_lcd_write(lcd, "... TWICE SO ..", len);  [....]  }   Hope this helps others....   alfa  PS I am using Nios II IDE 8.0 and and Quartus/SoPC builder 8.0sp1. As I was learning how to do this i figured out that the name of some include files has changed. For instance: altera_up_avalon_character_lcd.h  used to be: alt_up_character_lcd.h  Has anyone else noticed?

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@foleyme (http://www.alteraforum.com/forum/member.php?u=3960) 

i'm trying connect keyboard to FPGA ( kit DE2 like you) and display on LCD green..can you give me verilog code of DE2LCDDriver(parameter)?I realy need it :)

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you can use the LCD16207. 

that will work.

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hello everybody, i'm trying to display time and date on LCD ( board DE2 Altera) by VHDL code, can you help me with the code ? please, i'm a beginer. thanks you very much

[Altera_Forum]

I keep hitting this 'obsolete' thread... just FYI, as of Quartus 13.0sp1 the library is 'altera_avalon_lcd_16207.h'  

 Looking over that and the other docs should help...# include "altera_avalon_lcd_16207.h"# include "altera_avalon_lcd_16207_regs.h"  then you just treat it like a 'mostly avalon' device...  IORD_ALTERA_AVALON_LCD_16207_STATUS(baseAddress); IOWR_ALTERA_AVALON_LCD_16207_DATA(base, data);  However... the LCD needs quite a few 'waits'... so don't try to do a lot of IOWR's in a quick sequence.. put in some waits.. try starting wtih 100usec between them to start.