| /*************************************************************************** |
| * __________ __ ___. |
| * Open \______ \ ____ ____ | | _\_ |__ _______ ___ |
| * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / |
| * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < |
| * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ |
| * \/ \/ \/ \/ \/ |
| * $Id$ |
| * |
| * Copyright (C) 2004 by Linus Nielsen Feltzing |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version 2 |
| * of the License, or (at your option) any later version. |
| * |
| * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY |
| * KIND, either express or implied. |
| * |
| ****************************************************************************/ |
| #include "config.h" |
| |
| #include "system.h" |
| #include "kernel.h" |
| #include "lcd.h" |
| |
| /*** definitions ***/ |
| |
| /* LCD command codes */ |
| #define LCD_CNTL_POWER_CONTROL 0x25 |
| #define LCD_CNTL_VOLTAGE_SELECT 0x2b |
| #define LCD_CNTL_LINE_INVERT_DRIVE 0x36 |
| #define LCD_CNTL_GRAY_SCALE_PATTERN 0x39 |
| #define LCD_CNTL_TEMP_GRADIENT_SELECT 0x4e |
| #define LCD_CNTL_OSC_FREQUENCY 0x5f |
| #define LCD_CNTL_ON_OFF 0xae |
| #define LCD_CNTL_OSC_ON_OFF 0xaa |
| #define LCD_CNTL_OFF_MODE 0xbe |
| #define LCD_CNTL_REVERSE 0xa6 |
| #define LCD_CNTL_ALL_LIGHTING 0xa4 |
| #define LCD_CNTL_COMMON_OUTPUT_STATUS 0xc4 |
| #define LCD_CNTL_COLUMN_ADDRESS_DIR 0xa0 |
| #define LCD_CNTL_NLINE_ON_OFF 0xe4 |
| #define LCD_CNTL_DISPLAY_MODE 0x66 |
| #define LCD_CNTL_DUTY_SET 0x6d |
| #define LCD_CNTL_ELECTRONIC_VOLUME 0x81 |
| #define LCD_CNTL_DATA_INPUT_DIR 0x84 |
| #define LCD_CNTL_DISPLAY_START_LINE 0x8a |
| #define LCD_CNTL_AREA_SCROLL 0x10 |
| |
| #define LCD_CNTL_PAGE 0xb1 |
| #define LCD_CNTL_COLUMN 0x13 |
| #define LCD_CNTL_DATA_WRITE 0x1d |
| |
| /*** shared semi-private declarations ***/ |
| extern const unsigned char lcd_dibits[16] ICONST_ATTR; |
| |
| /*** hardware configuration ***/ |
| int lcd_default_contrast(void) |
| { |
| return DEFAULT_CONTRAST_SETTING; |
| } |
| |
| void lcd_set_contrast(int val) |
| { |
| /* Keep val in acceptable hw range */ |
| if (val < 0) |
| val = 0; |
| else if (val > 127) |
| val = 127; |
| |
| lcd_write_command_ex(LCD_CNTL_ELECTRONIC_VOLUME, val, -1); |
| } |
| |
| void lcd_set_invert_display(bool yesno) |
| { |
| lcd_write_command(LCD_CNTL_REVERSE | (yesno?1:0)); |
| } |
| |
| /* turn the display upside down (call lcd_update() afterwards) */ |
| void lcd_set_flip(bool yesno) |
| { |
| if (yesno) |
| { |
| lcd_write_command(LCD_CNTL_COLUMN_ADDRESS_DIR | 1); |
| lcd_write_command(LCD_CNTL_COMMON_OUTPUT_STATUS | 0); |
| lcd_write_command_ex(LCD_CNTL_DUTY_SET, 0x20, 0); |
| } |
| else |
| { |
| lcd_write_command(LCD_CNTL_COLUMN_ADDRESS_DIR | 0); |
| lcd_write_command(LCD_CNTL_COMMON_OUTPUT_STATUS | 1); |
| lcd_write_command_ex(LCD_CNTL_DUTY_SET, 0x20, 1); |
| } |
| } |
| |
| void lcd_init_device(void) |
| { |
| /* GPO35 is the LCD A0 pin |
| GPO46 is LCD RESET */ |
| or_l(0x00004008, &GPIO1_OUT); |
| or_l(0x00004008, &GPIO1_ENABLE); |
| or_l(0x00004008, &GPIO1_FUNCTION); |
| |
| /* Reset LCD */ |
| sleep(1); |
| and_l(~0x00004000, &GPIO1_OUT); |
| sleep(1); |
| or_l(0x00004000, &GPIO1_OUT); |
| sleep(1); |
| |
| lcd_write_command(LCD_CNTL_COLUMN_ADDRESS_DIR | 0); /* Normal */ |
| lcd_write_command(LCD_CNTL_COMMON_OUTPUT_STATUS | 1); /* Reverse dir */ |
| lcd_write_command(LCD_CNTL_REVERSE | 0); /* Reverse OFF */ |
| lcd_write_command(LCD_CNTL_ALL_LIGHTING | 0); /* Normal */ |
| lcd_write_command_ex(LCD_CNTL_DUTY_SET, 0x20, 1); |
| lcd_write_command(LCD_CNTL_OFF_MODE | 1); /* OFF -> VCC on drivers */ |
| lcd_write_command_ex(LCD_CNTL_VOLTAGE_SELECT, 3, -1); |
| lcd_write_command_ex(LCD_CNTL_ELECTRONIC_VOLUME, 0x1c, -1); |
| lcd_write_command_ex(LCD_CNTL_TEMP_GRADIENT_SELECT, 0, -1); |
| |
| lcd_write_command_ex(LCD_CNTL_LINE_INVERT_DRIVE, 0x10, -1); |
| lcd_write_command(LCD_CNTL_NLINE_ON_OFF | 1); /* N-line ON */ |
| |
| lcd_write_command_ex(LCD_CNTL_OSC_FREQUENCY, 3, -1); |
| lcd_write_command(LCD_CNTL_OSC_ON_OFF | 1); /* Oscillator ON */ |
| |
| lcd_write_command_ex(LCD_CNTL_POWER_CONTROL, 0x16, -1); |
| sleep(HZ/10); /* 100 ms pause */ |
| lcd_write_command_ex(LCD_CNTL_POWER_CONTROL, 0x17, -1); |
| |
| lcd_write_command_ex(LCD_CNTL_DISPLAY_START_LINE, 0, -1); |
| lcd_write_command_ex(LCD_CNTL_GRAY_SCALE_PATTERN, 0x43, -1); |
| lcd_write_command_ex(LCD_CNTL_DISPLAY_MODE, 0, -1); /* Greyscale mode */ |
| lcd_write_command(LCD_CNTL_DATA_INPUT_DIR | 0); /* Column mode */ |
| |
| lcd_update(); |
| lcd_write_command(LCD_CNTL_ON_OFF | 1); /* LCD ON */ |
| } |
| |
| /*** update functions ***/ |
| |
| /* Performance function that works with an external buffer |
| note that by and bheight are in 8-pixel units! */ |
| void lcd_blit_mono(const unsigned char *data, int x, int by, int width, |
| int bheight, int stride) |
| { |
| const unsigned char *src, *src_end; |
| unsigned char *dst_u, *dst_l; |
| static unsigned char upper[LCD_WIDTH] IBSS_ATTR; |
| static unsigned char lower[LCD_WIDTH] IBSS_ATTR; |
| unsigned int byte; |
| |
| by *= 2; |
| |
| while (bheight--) |
| { |
| src = data; |
| src_end = data + width; |
| dst_u = upper; |
| dst_l = lower; |
| do |
| { |
| byte = *src++; |
| *dst_u++ = lcd_dibits[byte & 0x0F]; |
| byte >>= 4; |
| *dst_l++ = lcd_dibits[byte & 0x0F]; |
| } |
| while (src < src_end); |
| |
| lcd_write_command_ex(LCD_CNTL_PAGE, by++, -1); |
| lcd_write_command_ex(LCD_CNTL_COLUMN, x, -1); |
| lcd_write_command(LCD_CNTL_DATA_WRITE); |
| lcd_write_data(upper, width); |
| |
| lcd_write_command_ex(LCD_CNTL_PAGE, by++, -1); |
| lcd_write_command_ex(LCD_CNTL_COLUMN, x, -1); |
| lcd_write_command(LCD_CNTL_DATA_WRITE); |
| lcd_write_data(lower, width); |
| |
| data += stride; |
| } |
| } |
| |
| /* Helper function for lcd_grey_phase_blit(). */ |
| void lcd_grey_data(unsigned char *values, unsigned char *phases, int count); |
| |
| /* Performance function that works with an external buffer |
| note that by and bheight are in 4-pixel units! */ |
| void lcd_blit_grey_phase(unsigned char *values, unsigned char *phases, |
| int x, int by, int width, int bheight, int stride) |
| { |
| stride <<= 2; /* 4 pixels per block */ |
| while (bheight--) |
| { |
| lcd_write_command_ex(LCD_CNTL_PAGE, by++, -1); |
| lcd_write_command_ex(LCD_CNTL_COLUMN, x, -1); |
| lcd_write_command(LCD_CNTL_DATA_WRITE); |
| lcd_grey_data(values, phases, width); |
| values += stride; |
| phases += stride; |
| } |
| } |
| |
| /* Update the display. |
| This must be called after all other LCD functions that change the display. */ |
| void lcd_update(void) ICODE_ATTR; |
| void lcd_update(void) |
| { |
| int y; |
| |
| /* Copy display bitmap to hardware */ |
| for (y = 0; y < LCD_FBHEIGHT; y++) |
| { |
| lcd_write_command_ex(LCD_CNTL_PAGE, y, -1); |
| lcd_write_command_ex(LCD_CNTL_COLUMN, 0, -1); |
| |
| lcd_write_command(LCD_CNTL_DATA_WRITE); |
| lcd_write_data (lcd_framebuffer[y], LCD_WIDTH); |
| } |
| } |
| |
| /* Update a fraction of the display. */ |
| void lcd_update_rect(int, int, int, int) ICODE_ATTR; |
| void lcd_update_rect(int x, int y, int width, int height) |
| { |
| int ymax; |
| |
| /* The Y coordinates have to work on even 8 pixel rows */ |
| ymax = (y + height-1) >> 2; |
| y >>= 2; |
| |
| if(x + width > LCD_WIDTH) |
| width = LCD_WIDTH - x; |
| if (width <= 0) |
| return; /* nothing left to do, 0 is harmful to lcd_write_data() */ |
| if(ymax >= LCD_FBHEIGHT) |
| ymax = LCD_FBHEIGHT-1; |
| |
| /* Copy specified rectange bitmap to hardware */ |
| for (; y <= ymax; y++) |
| { |
| lcd_write_command_ex(LCD_CNTL_PAGE, y, -1); |
| lcd_write_command_ex(LCD_CNTL_COLUMN, x, -1); |
| |
| lcd_write_command(LCD_CNTL_DATA_WRITE); |
| lcd_write_data (&lcd_framebuffer[y][x], width); |
| } |
| } |