int main(int argc, char **argv)
{
int rep;
int spifd;
gpio_request_one(RESET_GPIO, GPIOF_INIT_HIGH, "");
/* reset lcd controller */
gpio_set_value(RESET_GPIO, 0);
gpio_set_value(RESET_GPIO, 1);
spifd = open_spidev(SPIDEV, SPIMODE, SPISPEED);
printf("\nDevice code: 0x%04X\n", read_devicecode(spifd));
close(spifd);
gpio_free(RESET_GPIO);
return 0;
}
static int init_display(struct fbtft_par *par)
{
unsigned int devcode;
par->fbtftops.reset(par);
devcode = read_devicecode(par);
fbtft_par_dbg(DEBUG_INIT_DISPLAY, par, "Device code: 0x%04X\n",
devcode);
if ((devcode != 0x0000) && (devcode != 0x9320))
dev_warn(par->info->device,
"Unrecognized Device code: 0x%04X (expected 0x9320)\n",
devcode);
/* Initialization sequence from ILI9320 Application Notes */
/* *********** Start Initial Sequence ********* */
/* Set the Vcore voltage and this setting is must. */
write_reg(par, 0x00E5, 0x8000);
/* Start internal OSC. */
write_reg(par, 0x0000, 0x0001);
/* set SS and SM bit */
write_reg(par, 0x0001, 0x0100);
/* set 1 line inversion */
write_reg(par, 0x0002, 0x0700);
/* Resize register */
write_reg(par, 0x0004, 0x0000);
/* set the back and front porch */
write_reg(par, 0x0008, 0x0202);
/* set non-display area refresh cycle */
write_reg(par, 0x0009, 0x0000);
/* FMARK function */
write_reg(par, 0x000A, 0x0000);
/* RGB interface setting */
write_reg(par, 0x000C, 0x0000);
/* Frame marker Position */
write_reg(par, 0x000D, 0x0000);
/* RGB interface polarity */
write_reg(par, 0x000F, 0x0000);
/* ***********Power On sequence *************** */
/* SAP, BT[3:0], AP, DSTB, SLP, STB */
write_reg(par, 0x0010, 0x0000);
/* DC1[2:0], DC0[2:0], VC[2:0] */
write_reg(par, 0x0011, 0x0007);
/* VREG1OUT voltage */
write_reg(par, 0x0012, 0x0000);
/* VDV[4:0] for VCOM amplitude */
write_reg(par, 0x0013, 0x0000);
/* Dis-charge capacitor power voltage */
mdelay(200);
/* SAP, BT[3:0], AP, DSTB, SLP, STB */
write_reg(par, 0x0010, 0x17B0);
/* R11h=0x0031 at VCI=3.3V DC1[2:0], DC0[2:0], VC[2:0] */
write_reg(par, 0x0011, 0x0031);
mdelay(50);
/* R12h=0x0138 at VCI=3.3V VREG1OUT voltage */
write_reg(par, 0x0012, 0x0138);
mdelay(50);
/* R13h=0x1800 at VCI=3.3V VDV[4:0] for VCOM amplitude */
write_reg(par, 0x0013, 0x1800);
/* R29h=0x0008 at VCI=3.3V VCM[4:0] for VCOMH */
write_reg(par, 0x0029, 0x0008);
mdelay(50);
/* GRAM horizontal Address */
write_reg(par, 0x0020, 0x0000);
/* GRAM Vertical Address */
write_reg(par, 0x0021, 0x0000);
/* ------------------ Set GRAM area --------------- */
/* Horizontal GRAM Start Address */
write_reg(par, 0x0050, 0x0000);
/* Horizontal GRAM End Address */
write_reg(par, 0x0051, 0x00EF);
/* Vertical GRAM Start Address */
write_reg(par, 0x0052, 0x0000);
/* Vertical GRAM End Address */
write_reg(par, 0x0053, 0x013F);
/* Gate Scan Line */
write_reg(par, 0x0060, 0x2700);
/* NDL,VLE, REV */
write_reg(par, 0x0061, 0x0001);
/* set scrolling line */
write_reg(par, 0x006A, 0x0000);
/* -------------- Partial Display Control --------- */
write_reg(par, 0x0080, 0x0000);
write_reg(par, 0x0081, 0x0000);
write_reg(par, 0x0082, 0x0000);
write_reg(par, 0x0083, 0x0000);
write_reg(par, 0x0084, 0x0000);
write_reg(par, 0x0085, 0x0000);
/* -------------- Panel Control ------------------- */
write_reg(par, 0x0090, 0x0010);
write_reg(par, 0x0092, 0x0000);
write_reg(par, 0x0093, 0x0003);
write_reg(par, 0x0095, 0x0110);
write_reg(par, 0x0097, 0x0000);
write_reg(par, 0x0098, 0x0000);
write_reg(par, 0x0007, 0x0173); /* 262K color and display ON */
return 0;
}
