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*
* \brief Himax HX8347 LCD controller driver
*
* \author Stefano Fedrigo <aleph@develer.com>
*
* Display initialization sequence is based on Atmel's softpack library
* implementation, see license below.
*/
/* ----------------------------------------------------------------------------
* ATMEL Microcontroller Software Support
* ----------------------------------------------------------------------------
* Copyright (c) 2010, Atmel Corporation
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the disclaimer below.
*
* Atmel's name may not be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
* DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
* ----------------------------------------------------------------------------
*/
#include "lcd_hx8347.h"
#include "hw/hw_hx8347.h"
#include <cfg/debug.h>
#include <drv/timer.h>
// Himax HX8347 chip id
#define HX8347_ID_HIMAX 0x47
static uint16_t lcd_row[LCD_WIDTH];
struct lcd_hx8347_reg
{
uint8_t cmd; // Register index, if 0xFF wait for value ms
uint8_t data; // Register value
};
static const struct lcd_hx8347_reg init_seq[] =
{
// Start internal OSC
{ 0x19, 0x49 }, // OSCADJ=10 0000, OSD_EN=1 //60Hz
{ 0x93, 0x0C }, // RADJ=1100
// Power on flow
{ 0x44, 0x4D }, // VCM=100 1101
{ 0x45, 0x11 }, // VDV=1 0001
{ 0x20, 0x40 }, // BT=0100
{ 0x1D, 0x07 }, // VC1=111
{ 0x1E, 0x00 }, // VC3=000
{ 0x1F, 0x04 }, // VRH=0100
{ 0x1C, 0x04 }, // AP=100
{ 0x1B, 0x10 }, // GASENB=0, PON=1, DK=0, XDK=0, DDVDH_TRI=0, STB=0
{ 0xFF, 50 }, // 50 ms delay
{ 0x43, 0x80 }, // Set VCOMG=1
{ 0xFF, 50 }, // 50 ms delay
#if 0
// Gamma for CMO 2.8
{ 0x46, 0x95 },
{ 0x47, 0x51 },
{ 0x48, 0x00 },
{ 0x49, 0x36 },
{ 0x4A, 0x11 },
{ 0x4B, 0x66 },
{ 0x4C, 0x14 },
{ 0x4D, 0x77 },
{ 0x4E, 0x13 },
{ 0x4F, 0x4C },
{ 0x50, 0x46 },
{ 0x51, 0x46 },
#endif
// 240x320 window setting
{ 0x02, 0x00 }, // Column address start2
{ 0x03, 0x00 }, // Column address start1
{ 0x04, 0x00 }, // Column address end2
{ 0x05, 0xEF }, // Column address end1
{ 0x06, 0x00 }, // Row address start2
{ 0x07, 0x00 }, // Row address start1
{ 0x08, 0x01 }, // Row address end2
{ 0x09, 0x3F }, // Row address end1
// Display Setting
{ 0x01, 0x06 }, // IDMON=0, INVON=1, NORON=1, PTLON=0
// { 0x16, 0xC8 }, // MY=1, MX=1, MV=0, BGR=1
{ 0x16, 0x68 }, // MY=0, MX=1, MV=1, RGB XY exchange X mirror
{ 0x23, 0x95 }, // N_DC=1001 0101
{ 0x24, 0x95 }, // P_DC=1001 0101
{ 0x25, 0xFF }, // I_DC=1111 1111
{ 0x27, 0x06 }, // N_BP=0000 0110
{ 0x28, 0x06 }, // N_FP=0000 0110
{ 0x29, 0x06 }, // P_BP=0000 0110
{ 0x2A, 0x06 }, // P_FP=0000 0110
{ 0x2C, 0x06 }, // I_BP=0000 0110
{ 0x2D, 0x06 }, // I_FP=0000 0110
{ 0x3A, 0x01 }, // N_RTN=0000, N_NW=001
{ 0x3B, 0x01 }, // P_RTN=0000, P_NW=001
{ 0x3C, 0xF0 }, // I_RTN=1111, I_NW=000
{ 0x3D, 0x00 }, // DIV=00
{ 0x3E, 0x38 }, // SON=38h
{ 0x40, 0x0F }, // GDON=0Fh
{ 0x41, 0xF0 }, // GDOF=F0h
};
/*
* Write to an LCD register.
*/
static void regWrite(uint8_t reg, uint16_t val)
{
hx8347_cmd(reg);
hx8347_write(val);
}
/*
* Read data from a LCD register.
*/
static uint16_t regRead(uint8_t reg)
{
hx8347_cmd(reg);
return hx8347_read();
}
/*
* Write data in a buffer to the LCD controller.
*/
static void bufferWrite(const uint16_t *buf, uint16_t size)
{
uint16_t i;
for (i = 0 ; i < size; ++i)
hx8347_write(buf[i]);
}
static void lcd_setCursor(uint16_t x, uint16_t y)
{
regWrite(0x02, x >> 8);
regWrite(0x03, x & 0xff);
regWrite(0x06, y >> 8);
regWrite(0x07, y & 0xff);
}
static void lcd_setWindow(uint16_t x, uint16_t y, uint16_t width, uint16_t height)
{
ASSERT(x + width <= LCD_WIDTH);
ASSERT(y + height <= LCD_HEIGHT);
ASSERT(width > 0);
ASSERT(height > 0);
// Window right and bottom limits are inclusive
width--;
height--;
lcd_setCursor(x, y);
regWrite(0x04, (x + width) >> 8);
regWrite(0x05, (x + width) & 0xff);
regWrite(0x08, (y + height) >> 8);
regWrite(0x09, (y + height) & 0xff);
}
/*
* Refresh a bitmap on screen
*/
void lcd_hx8347_blitBitmap(const Bitmap *bm)
{
uint8_t mask;
int i, l, r;
lcd_setWindow(0, 0, bm->width, bm->height);
hx8347_cmd(0x22);
for (l = 0; l < bm->height / 8; l++)
{
for (mask = 1; mask; mask <<= 1)
{
for (i = 0; i < bm->width; i++)
{
if (bm->raster[l * bm->width + i] & mask)
lcd_row[i] = 0x0000;
else
lcd_row[i] = 0xFFFF;
}
bufferWrite(lcd_row, bm->width);
}
}
for (r = 0, mask = 1; r < bm->height % 8; r++, mask <<= 1)
{
for (i = 0; i < bm->width; i++)
{
if (bm->raster[l * bm->width + i] & mask)
lcd_row[i] = 0x0000;
else
lcd_row[i] = 0xFFFF;
}
bufferWrite(lcd_row, bm->width);
}
}
/*
* Blit a 24 bit color raw raster directly on screen
*/
void lcd_hx8347_blitBitmap24(int x, int y, int width, int height, const char *bmp)
{
int l, r;
lcd_setWindow(x, y, width, height);
hx8347_cmd(0x22);
for (l = 0; l < height; l++)
{
for (r = 0; r < width; r++)
{
lcd_row[r] =
(((uint16_t)bmp[0] << 8) & 0xF800) |
(((uint16_t)bmp[1] << 3) & 0x07E0) |
(((uint16_t)bmp[2] >> 3) & 0x001F);
bmp += 3;
}
bufferWrite(lcd_row, width);
}
}
/**
* Turn off display.
*/
void lcd_hx8347_off(void)
{
regWrite(0x90, 0); // SAP=0000 0000
regWrite(0x26, 0); // GON=0, DTE=0, D=00
}
/**
* Turn on display.
*/
void lcd_hx8347_on(void)
{
regWrite(0x90, 0x7F); // SAP=0111 1111
regWrite(0x26, 0x04); // GON=0, DTE=0, D=01
timer_delay(100);
regWrite(0x26, 0x24); // GON=1, DTE=0, D=01
regWrite(0x26, 0x2C); // GON=1, DTE=0, D=11
timer_delay(100);
regWrite(0x26, 0x3C); // GON=1, DTE=1, D=11
}
/**
* Display initialization.
*/
void lcd_hx8347_init(void)
{
unsigned i;
uint16_t chip_id;
hx8347_busInit();
lcd_hx8347_off();
// Check chip id
if ((chip_id = regRead(0x67)) != HX8347_ID_HIMAX)
{
kprintf("HX8347 chip id read error or wrong id (0x%x), skipping initialization.\n", chip_id);
return;
}
for (i = 0; i < countof(init_seq); i++)
{
if (init_seq[i].cmd != 0xFF)
regWrite(init_seq[i].cmd, init_seq[i].data);
else
timer_delay(init_seq[i].data);
}
lcd_hx8347_on();
}