void lcd_init()
{
// Setup all lcd pins as outputs
LCD_CONTROL_DDR |= _BV(LCD_RS_PIN) | _BV(LCD_E_PIN);
LCD_DATA_DDR |= _BV(LCD_DATA0_PIN) | _BV(LCD_DATA1_PIN) | _BV(LCD_DATA2_PIN) | _BV(LCD_DATA3_PIN);
// Wait for the module
_delay_ms(200);
// To be safe switch back to 8-bit interface for a moment (Function Set)
LCD_CONTROL_PORT &= ~_BV(LCD_RS_PIN) & ~_BV(LCD_E_PIN);
LCD_RST_DATA;
LCD_DATA_PORT |= _BV(LCD_DATA0_PIN) | _BV(LCD_DATA1_PIN);
lcd_strobe();
_delay_ms(10);
lcd_strobe();
_delay_ms(10);
lcd_strobe();
_delay_ms(10);
// Function Set: switch to 4 bit mode (last 8-bit command)
LCD_RST_DATA;
LCD_DATA_PORT |= _BV(LCD_DATA1_PIN);
lcd_strobe();
_delay_ms(10);
// Using 4 bit mode now. Repeat Function Set command (2 lines, 5x8 chars, 4-bit mode)
lcd_cmd(0x28);
lcd_off();
lcd_clr();
lcd_cmd(LCD_CMD_DEFAULT_MODE);
lcd_on();
}
void lcd_test(void)
{
unsigned char c;
static int lcdon = 0;
static int blon = 0;
static int dispon = 0;
lcd_init();
while (1)
{
printf("********LCD TEST MENU********\n\r");
printf("[L] enable/disable LCD\n\r");
printf("[B] enable/disable back light\n\r");
printf("[C] enable/disable s3c6410 display controller\n\r");
printf("[D] display color\n\r");
printf("[Q] quit\n\r");
do {
c = getc();
if (c == '\n' || c == '\r')
{
printf("\n\r");
}
else
{
putc(c);
}
} while (c == '\n' || c == '\r');
switch (c) {
case 'l':
case 'L':
{
if (lcdon)
{
lcd_off();
printf("LCD off\n\r");
}
else
{
lcd_on();
printf("LCD on\n\r");
}
lcdon = !lcdon;
break;
}
case 'b':
case 'B':
{
if (blon)
{
backlight_disable();
printf("Backlight off\n\r");
}
else
{
backlight_enable();
printf("Backlight on\n\r");
}
blon = !blon;
break;
}
case 'c':
case 'C':
{
if (dispon)
{
displaycon_off();
printf("Display controller off\n\r");
}
else
{
displaycon_on();
printf("Display controller on\n\r");
}
blon = !blon;
break;
}
case 'd':
case 'D':
{
display_red();
break;
}
case 'q':
case 'Q':
{
return ;
break;
}
}
}
}
int main (void)
{
FRESULT rc; /* Result code */
DIR dir; /* Directory object */
FILINFO fno; /* File information object */
unsigned long br, i;
alt_u32* active_buff;
printf("System started\r\n");
lcd_off();
for(i=0;i<5000000;i++){}
alt_sgdma_dev *dma = alt_avalon_sgdma_open("/dev/sgdma");
printf("open dma returned %ld\n", (alt_u32)dma);
printf("framebuffer 1 at %lx\n", (alt_u32)frameBufferA);
printf("framebuffer 2 at %lx\n", (alt_u32)frameBufferB);
active_buff = frameBufferA;
//printf("framebuffer 1 at %lx\n", (alt_u32)active_buff);
printf("Turning LCD on \r\n");
lcd_on();
printf("Starting DMA\r\n");
init_and_start_framebuffer(dma);
IoInit();
Color col2;
col2.color32 = 0x00ff0000;
memset(frameBufferA, col2.color32, 522240/4);
f_mount(0, &Fatfs); /* Register volume work area (never fails) */
for (;;) {
printf("\nOpen root directory.\n");
rc = f_opendir(&dir, "");
if (rc) die(rc);
printf("\nDirectory listing...\n");
for (;;) {
rc = f_readdir(&dir, &fno); /* Read a directory item */
if (rc || !fno.fname[0]) break; /* Error or end of dir */
if (fno.fattrib & AM_DIR)
printf(" <dir> %s\n", fno.fname);
else {
printf("%8lu %s\n", fno.fsize, fno.fname);
//printf("\nOpen an existing file.\n");
rc = f_open(&Fil, fno.fname, FA_READ);
if (rc) die(rc);
if (active_buffer == 0) {
active_buffer = 1;
active_buff = frameBufferA;
} else {
active_buff = frameBufferB;
active_buffer = 0;
}
for (;;) {
rc = f_read(&Fil, (alt_u32*)active_buff, f_size(&Fil), &br); /* Read a chunk of file */
if (rc || !br)
break; /* Error or end of file */
}
if (rc) die(rc);
rc = f_close(&Fil);
if (rc) die(rc);
}
}
if (rc) die(rc);
}
}
