How to Initialize Char LCD using PIO (De0-Nano)

Hi I've been able to initialize it correctly.

I didn't set the biport output direction for all data pins.

No I fixed it:

IOWR_ALTERA_AVALON_PIO_DIRECTION(PIO_LCD_DATA_BASE , 0b11111111);

Anyway I try to print some char after the initialization but no result, here's the code I used to print a char:

IOWR_ALTERA_AVALON_PIO_DATA(PIO_LCD_DATA_BASE, 0x80);

usleep(1);

IOWR_ALTERA_AVALON_PIO_DATA(PIO_LCD_COMMAND_BASE, 0b001);

usleep(2);

IOWR_ALTERA_AVALON_PIO_DATA(PIO_LCD_COMMAND_BASE, 0b000);

usleep(200);

IOWR_ALTERA_AVALON_PIO_DATA(PIO_LCD_DATA_BASE, 0x41);

usleep(1);

IOWR_ALTERA_AVALON_PIO_DATA(PIO_LCD_COMMAND_BASE, 0b101);

usleep(2);

IOWR_ALTERA_AVALON_PIO_DATA(PIO_LCD_COMMAND_BASE, 0b100);

usleep(200);

I take some wide timing since I wanted to be sure the unit has time to do its internal operation.