Graphics LCD problem with Cyclone III FPGA Development Kit

Hi,

I was also looking to use the graphics LCD in Stratix III. Good to see your post. I saw that same Graphics LCD is used in Cyclone III as well as Stratix III.

I wanted to ask a few questions regarding how to make it work.

Here is what I did after seeing your example ... In the standard NIOS example, I did the following things...

1) In SOPC builder, I put 6 different PIO ports - oled_data (8 bits), oled_csn(1 bit), oled_d_cn(1 bit), oled_e_rdn(1 bit), oled_rstn(1 bit), oled_wen(1 bit).

2) synthesized the whole thing in quartus and programmed to Stratix III.

3) Used eclipse, and the program is the following, which i modified

# include <stdio.h># include <unistd.h># include "system.h"# include "altera_avalon_pio_regs.h"

int main()

{

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

IOWR_ALTERA_AVALON_PIO_DATA(OLED_E_RDN_BASE, 1); // Set all glcd pins HIGH

IOWR_ALTERA_AVALON_PIO_DATA(OLED_WEN_BASE, 1);

IOWR_ALTERA_AVALON_PIO_DATA(OLED_D_CN_BASE, 1);

IOWR_ALTERA_AVALON_PIO_DATA(OLED_CSN_BASE, 1);

IOWR_ALTERA_AVALON_PIO_DATA(OLED_RSTN_BASE, 0); // Hard reset

usleep(20); // Wait 20us;

IOWR_ALTERA_AVALON_PIO_DATA(OLED_RSTN_BASE, 1); // Release reset;

usleep(100000); // Wait 100ms);

IOWR_ALTERA_AVALON_PIO_DATA(OLED_DATA_BASE, 0xe2); // Internal Reset

IOWR_ALTERA_AVALON_PIO_DATA(OLED_DATA_BASE, 0xa2); // Bias = 1/9; 0xa3 for 1/7

IOWR_ALTERA_AVALON_PIO_DATA(OLED_DATA_BASE, 0xa1); // ADC = 1 (right to left); 0xa0 for 0(left to right)

IOWR_ALTERA_AVALON_PIO_DATA(OLED_DATA_BASE, 0xc0); // Common direction = Normal; 0xc1 for inverse

IOWR_ALTERA_AVALON_PIO_DATA(OLED_DATA_BASE, 0x28); // Set Power Control - Internal power circuits OFF ******* but looks better with 0x2f

IOWR_ALTERA_AVALON_PIO_DATA(OLED_DATA_BASE, 0xe7); // Set Driver ON; 0xe6 for OFF

IOWR_ALTERA_AVALON_PIO_DATA(OLED_DATA_BASE, 0xaf); // Display ON; 0xae for OFF

IOWR_ALTERA_AVALON_PIO_DATA(OLED_DATA_BASE, 0xa5); // Entire Display ON - Turn ON all pixels (irrespective of RAM)

usleep(500000); // Wait 500ms

usleep(500000);

IOWR_ALTERA_AVALON_PIO_DATA(OLED_DATA_BASE, 0xa4); // Entire Display NORMAL - Pixels correspond to display RAM

return 0;

}

I couldn't see any change in the graphics LCD panel...it is always light with blue light and it stays same...

can u tell what I might have done wrong..

thanks

pramod