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Altera_Forum
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22 years ago

What's wrong with my programm?

I have write a programme to initialize the lcd16207,but it couldn&#39;t work correctly. The code is:# include <unistd.h># include <stdlib.h># include <stdio.h> //#include "lcd_16207.h" /* Comman...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
22 years ago

<div class='quotetop'>QUOTE </div>

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PIO_LCD_IO_COMMAND=LCD_CMD_FUNCTION_SET | LCD_CMD_8BIT;

PIO_LCD_IO_COMMAND=LCD_CMD_FUNCTION_SET | LCD_CMD_8BIT | LCD_CMD_TWO_LINE;

PIO_LCD_IO_COMMAND=LCD_CMD_ONOFF;

PIO_LCD_IO_COMMAND=LCD_CMD_CLEAR;

PIO_LCD_IO_COMMAND=LCD_CMD_MODES | LCD_CMD_MODE_INC;

PIO_LCD_IO_COMMAND=LCD_CMD_ONOFF | LCD_CMD_ENABLE_DISP;[/b]

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There&#39;s no delays here, presumably these commands will be far too quick for the LCD.

Have you traced through the code?

Strictly speaking you sh9uldn&#39;t be writing directly to a device from userland, but a lack of MMU on nios shouldn&#39;t prevent this from happening.

What exactly "not works", have you looked at the signals under a scope?

Adrian