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; }