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327 lines
8.4 KiB
C
327 lines
8.4 KiB
C
/**
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* \file
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* <!--
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* This file is part of BeRTOS.
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*
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* Bertos is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* As a special exception, you may use this file as part of a free software
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* library without restriction. Specifically, if other files instantiate
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* templates or use macros or inline functions from this file, or you compile
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* this file and link it with other files to produce an executable, this
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* file does not by itself cause the resulting executable to be covered by
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* the GNU General Public License. This exception does not however
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* invalidate any other reasons why the executable file might be covered by
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* the GNU General Public License.
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*
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* Copyright 2011 Develer S.r.l. (http://www.develer.com/)
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*
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* -->
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*
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* \brief Himax HX8347 LCD controller driver
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*
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* \author Stefano Fedrigo <aleph@develer.com>
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*
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* Display initialization sequence is based on Atmel's softpack library
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* implementation, see license below.
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*/
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/* ----------------------------------------------------------------------------
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* ATMEL Microcontroller Software Support
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* ----------------------------------------------------------------------------
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* Copyright (c) 2010, Atmel Corporation
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the disclaimer below.
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*
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* Atmel's name may not be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
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* DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
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* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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* ----------------------------------------------------------------------------
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*/
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#include "lcd_hx8347.h"
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#include "hw/hw_hx8347.h"
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#include <cfg/debug.h>
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#include <drv/timer.h>
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// Himax HX8347 chip id
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#define HX8347_ID_HIMAX 0x47
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static uint16_t lcd_row[LCD_WIDTH];
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struct lcd_hx8347_reg
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{
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uint8_t cmd; // Register index, if 0xFF wait for value ms
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uint8_t data; // Register value
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};
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static const struct lcd_hx8347_reg init_seq[] =
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{
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// Start internal OSC
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{ 0x19, 0x49 }, // OSCADJ=10 0000, OSD_EN=1 //60Hz
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{ 0x93, 0x0C }, // RADJ=1100
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// Power on flow
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{ 0x44, 0x4D }, // VCM=100 1101
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{ 0x45, 0x11 }, // VDV=1 0001
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{ 0x20, 0x40 }, // BT=0100
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{ 0x1D, 0x07 }, // VC1=111
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{ 0x1E, 0x00 }, // VC3=000
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{ 0x1F, 0x04 }, // VRH=0100
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{ 0x1C, 0x04 }, // AP=100
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{ 0x1B, 0x10 }, // GASENB=0, PON=1, DK=0, XDK=0, DDVDH_TRI=0, STB=0
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{ 0xFF, 50 }, // 50 ms delay
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{ 0x43, 0x80 }, // Set VCOMG=1
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{ 0xFF, 50 }, // 50 ms delay
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#if 0
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// Gamma for CMO 2.8
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{ 0x46, 0x95 },
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{ 0x47, 0x51 },
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{ 0x48, 0x00 },
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{ 0x49, 0x36 },
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{ 0x4A, 0x11 },
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{ 0x4B, 0x66 },
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{ 0x4C, 0x14 },
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{ 0x4D, 0x77 },
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{ 0x4E, 0x13 },
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{ 0x4F, 0x4C },
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{ 0x50, 0x46 },
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{ 0x51, 0x46 },
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#endif
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// 240x320 window setting
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{ 0x02, 0x00 }, // Column address start2
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{ 0x03, 0x00 }, // Column address start1
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{ 0x04, 0x00 }, // Column address end2
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{ 0x05, 0xEF }, // Column address end1
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{ 0x06, 0x00 }, // Row address start2
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{ 0x07, 0x00 }, // Row address start1
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{ 0x08, 0x01 }, // Row address end2
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{ 0x09, 0x3F }, // Row address end1
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// Display Setting
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{ 0x01, 0x06 }, // IDMON=0, INVON=1, NORON=1, PTLON=0
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// { 0x16, 0xC8 }, // MY=1, MX=1, MV=0, BGR=1
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{ 0x16, 0x68 }, // MY=0, MX=1, MV=1, RGB XY exchange X mirror
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{ 0x23, 0x95 }, // N_DC=1001 0101
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{ 0x24, 0x95 }, // P_DC=1001 0101
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{ 0x25, 0xFF }, // I_DC=1111 1111
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{ 0x27, 0x06 }, // N_BP=0000 0110
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{ 0x28, 0x06 }, // N_FP=0000 0110
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{ 0x29, 0x06 }, // P_BP=0000 0110
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{ 0x2A, 0x06 }, // P_FP=0000 0110
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{ 0x2C, 0x06 }, // I_BP=0000 0110
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{ 0x2D, 0x06 }, // I_FP=0000 0110
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{ 0x3A, 0x01 }, // N_RTN=0000, N_NW=001
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{ 0x3B, 0x01 }, // P_RTN=0000, P_NW=001
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{ 0x3C, 0xF0 }, // I_RTN=1111, I_NW=000
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{ 0x3D, 0x00 }, // DIV=00
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{ 0x3E, 0x38 }, // SON=38h
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{ 0x40, 0x0F }, // GDON=0Fh
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{ 0x41, 0xF0 }, // GDOF=F0h
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};
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/*
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* Write to an LCD register.
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*/
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static void regWrite(uint8_t reg, uint16_t val)
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{
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hx8347_cmd(reg);
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hx8347_write(val);
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}
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/*
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* Read data from a LCD register.
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*/
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static uint16_t regRead(uint8_t reg)
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{
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hx8347_cmd(reg);
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return hx8347_read();
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}
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/*
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* Write data in a buffer to the LCD controller.
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*/
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static void bufferWrite(const uint16_t *buf, uint16_t size)
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{
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uint16_t i;
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for (i = 0 ; i < size; ++i)
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hx8347_write(buf[i]);
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}
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static void lcd_setCursor(uint16_t x, uint16_t y)
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{
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regWrite(0x02, x >> 8);
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regWrite(0x03, x & 0xff);
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regWrite(0x06, y >> 8);
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regWrite(0x07, y & 0xff);
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}
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static void lcd_setWindow(uint16_t x, uint16_t y, uint16_t width, uint16_t height)
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{
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ASSERT(x + width <= LCD_WIDTH);
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ASSERT(y + height <= LCD_HEIGHT);
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ASSERT(width > 0);
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ASSERT(height > 0);
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// Window right and bottom limits are inclusive
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width--;
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height--;
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lcd_setCursor(x, y);
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regWrite(0x04, (x + width) >> 8);
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regWrite(0x05, (x + width) & 0xff);
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regWrite(0x08, (y + height) >> 8);
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regWrite(0x09, (y + height) & 0xff);
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}
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/*
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* Refresh a bitmap on screen
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*/
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void lcd_hx8347_blitBitmap(const Bitmap *bm)
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{
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uint8_t mask;
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int i, l, r;
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lcd_setWindow(0, 0, bm->width, bm->height);
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hx8347_cmd(0x22);
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for (l = 0; l < bm->height / 8; l++)
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{
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for (mask = 1; mask; mask <<= 1)
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{
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for (i = 0; i < bm->width; i++)
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{
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if (bm->raster[l * bm->width + i] & mask)
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lcd_row[i] = 0x0000;
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else
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lcd_row[i] = 0xFFFF;
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}
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bufferWrite(lcd_row, bm->width);
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}
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}
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for (r = 0, mask = 1; r < bm->height % 8; r++, mask <<= 1)
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{
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for (i = 0; i < bm->width; i++)
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{
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if (bm->raster[l * bm->width + i] & mask)
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lcd_row[i] = 0x0000;
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else
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lcd_row[i] = 0xFFFF;
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}
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bufferWrite(lcd_row, bm->width);
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}
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}
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/*
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* Blit a 24 bit color raw raster directly on screen
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*/
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void lcd_hx8347_blitBitmap24(int x, int y, int width, int height, const char *bmp)
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{
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int l, r;
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lcd_setWindow(x, y, width, height);
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hx8347_cmd(0x22);
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for (l = 0; l < height; l++)
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{
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for (r = 0; r < width; r++)
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{
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lcd_row[r] =
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(((uint16_t)bmp[0] << 8) & 0xF800) |
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(((uint16_t)bmp[1] << 3) & 0x07E0) |
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(((uint16_t)bmp[2] >> 3) & 0x001F);
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bmp += 3;
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}
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bufferWrite(lcd_row, width);
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}
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}
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/**
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* Turn off display.
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*/
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void lcd_hx8347_off(void)
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{
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regWrite(0x90, 0); // SAP=0000 0000
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regWrite(0x26, 0); // GON=0, DTE=0, D=00
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}
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/**
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* Turn on display.
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*/
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void lcd_hx8347_on(void)
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{
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regWrite(0x90, 0x7F); // SAP=0111 1111
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regWrite(0x26, 0x04); // GON=0, DTE=0, D=01
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timer_delay(100);
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regWrite(0x26, 0x24); // GON=1, DTE=0, D=01
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regWrite(0x26, 0x2C); // GON=1, DTE=0, D=11
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timer_delay(100);
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regWrite(0x26, 0x3C); // GON=1, DTE=1, D=11
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}
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/**
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* Display initialization.
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*/
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void lcd_hx8347_init(void)
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{
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unsigned i;
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uint16_t chip_id;
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hx8347_busInit();
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lcd_hx8347_off();
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// Check chip id
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if ((chip_id = regRead(0x67)) != HX8347_ID_HIMAX)
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{
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kprintf("HX8347 chip id read error or wrong id (0x%x), skipping initialization.\n", chip_id);
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return;
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}
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for (i = 0; i < countof(init_seq); i++)
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{
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if (init_seq[i].cmd != 0xFF)
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regWrite(init_seq[i].cmd, init_seq[i].data);
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else
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timer_delay(init_seq[i].data);
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}
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lcd_hx8347_on();
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}
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