/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * $Id$ * * Copyright (C) 2002 by Alan Korr * Copyright (C) 2008 François Dinel * Copyright (C) 2008-2009 Rafaël Carré * * 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 "kernel.h" #include "lcd.h" #include "system.h" #include "cpu.h" #include "string.h" #include "lcd-clip.h" /*** definitions ***/ #define LCD_SET_LOWER_COLUMN_ADDRESS ((char)0x00) #define LCD_SET_HIGHER_COLUMN_ADDRESS ((char)0x10) #define LCD_SET_DISPLAY_START_LINE ((char)0x40) #define LCD_SET_CONTRAST_CONTROL_REGISTER ((char)0x81) #define LCD_SET_SEGMENT_REMAP ((char)0xA0) #define LCD_SET_SEGMENT_REMAP_INV ((char)0xA1) #define LCD_SET_ENTIRE_DISPLAY_OFF ((char)0xA4) #define LCD_SET_ENTIRE_DISPLAY_ON ((char)0xA5) #define LCD_SET_NORMAL_DISPLAY ((char)0xA6) #define LCD_SET_REVERSE_DISPLAY ((char)0xA7) #define LCD_SET_MULTIPLEX_RATIO ((char)0xA8) #define LCD_SET_DC_DC ((char)0xAD) #define LCD_SET_DISPLAY_OFF ((char)0xAE) #define LCD_SET_DISPLAY_ON ((char)0xAF) #define LCD_SET_PAGE_ADDRESS ((char)0xB0) #define LCD_SET_COM_OUTPUT_SCAN_DIRECTION ((char)0xC0) #define LCD_SET_COM_OUTPUT_SCAN_DIRECTION_INV ((char)0xC8) #define LCD_SET_DISPLAY_CLOCK_AND_OSC_FREQ ((char)0xD5) #define LCD_SET_VCOM_DESELECT_LEVEL ((char)0xDB) #define LCD_SET_PRECHARGE_PERIOD ((char)0xD9) #define LCD_NOP ((char)0xE3) /* LCD command codes */ #define LCD_CNTL_CONTRAST 0x81 /* Contrast */ #define LCD_CNTL_OUTSCAN 0xc8 /* Output scan direction */ #define LCD_CNTL_SEGREMAP 0xa1 /* Segment remap */ #define LCD_CNTL_DISPON 0xaf /* Display on */ #define LCD_CNTL_PAGE 0xb0 /* Page address */ #define LCD_CNTL_HIGHCOL 0x10 /* Upper column address */ #define LCD_CNTL_LOWCOL 0x00 /* Lower column address */ /** globals **/ static bool display_on; /* used by lcd_enable */ /* Display variant, always 0 in clipv1, clipv2, can be 0 or 1 in clip+ * variant 0: has 132 pixel wide framebuffer, max brightness about 50 * variant 1: has 128 pixel wide framebuffer, max brightness about 128 */ static int variant; static int offset; /* column offset */ /*** hardware configuration ***/ int lcd_default_contrast(void) { return DEFAULT_CONTRAST_SETTING; } void lcd_set_contrast(int val) { lcd_write_command(LCD_CNTL_CONTRAST); if (variant == 1) { val = val * 5 / 2; } lcd_write_command(val); } void lcd_set_invert_display(bool yesno) { if (yesno) lcd_write_command(LCD_SET_REVERSE_DISPLAY); else lcd_write_command(LCD_SET_NORMAL_DISPLAY); } /* turn the display upside down (call lcd_update() afterwards) */ void lcd_set_flip(bool yesno) { if (yesno) { lcd_write_command(LCD_SET_SEGMENT_REMAP); lcd_write_command(LCD_SET_COM_OUTPUT_SCAN_DIRECTION); } else { lcd_write_command(LCD_SET_SEGMENT_REMAP_INV); lcd_write_command(LCD_SET_COM_OUTPUT_SCAN_DIRECTION_INV); } } #ifdef HAVE_LCD_ENABLE void lcd_enable(bool enable) { if(display_on == enable) return; if( (display_on = enable) ) /* simple '=' is not a typo ! */ { lcd_enable_power(enable); lcd_write_command(LCD_SET_DISPLAY_ON); send_event(LCD_EVENT_ACTIVATION, NULL); } else { lcd_write_command(LCD_SET_DISPLAY_OFF); lcd_enable_power(enable); } } bool lcd_active(void) { return display_on; } #endif /* LCD init, largely based on what OF does */ void lcd_init_device(void) { int i; variant = lcd_hw_init(); offset = (variant == 0) ? 2 : 0; /* Set display clock (divide ratio = 1) and oscillator frequency (1) */ lcd_write_command(LCD_SET_DISPLAY_CLOCK_AND_OSC_FREQ); lcd_write_command(0x10); /* Set VCOM deselect level to 0.76V */ lcd_write_command(LCD_SET_VCOM_DESELECT_LEVEL); lcd_write_command(0x34); /* Set pre-charge period (p1period is 2 dclk and p2period is 5 dclk) */ lcd_write_command(LCD_SET_PRECHARGE_PERIOD); lcd_write_command(0x25); /* Set contrast register to 12% */ lcd_set_contrast(lcd_default_contrast()); /* Configure DC-DC */ lcd_write_command(LCD_SET_DC_DC); lcd_write_command((variant == 0) ? 0x8A : 0x10); /* Set starting line as 0 */ lcd_write_command(LCD_SET_DISPLAY_START_LINE /*|(0 & 0x3f)*/); /* Column 131 is remapped to SEG0 */ lcd_write_command(LCD_SET_SEGMENT_REMAP_INV); /* Invert COM scan direction (N-1 to 0) */ lcd_write_command(LCD_SET_COM_OUTPUT_SCAN_DIRECTION_INV); /* Set normal display mode (not every pixel ON) */ lcd_write_command(LCD_SET_ENTIRE_DISPLAY_OFF); /* Set normal display mode (not inverted) */ lcd_write_command(LCD_SET_NORMAL_DISPLAY); /* Clear whole framebuffer, including "overscan" * We don't need to handle that out of screen columns in lcd_clear_display() * since we will never write into it anymore */ lcd_write_command (LCD_SET_HIGHER_COLUMN_ADDRESS /*| 0*/); lcd_write_command (LCD_SET_LOWER_COLUMN_ADDRESS /*| 0*/); fb_data p_bytes[LCD_WIDTH + 2 * offset]; memset(p_bytes, 0, sizeof(p_bytes)); /* fills with 0 : pixel off */ for(i = 0; i < 8; i++) { lcd_write_command (LCD_SET_PAGE_ADDRESS | (i /*& 0xf*/)); lcd_write_data(p_bytes, LCD_WIDTH + 2 * offset); } lcd_enable(true); lcd_update(); } /*** 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) { if(!display_on) return; /* Copy display bitmap to hardware */ while (bheight--) { lcd_write_command (LCD_CNTL_PAGE | (by++ & 0xf)); lcd_write_command (LCD_CNTL_HIGHCOL | (((x+offset)>>4) & 0xf)); lcd_write_command (LCD_CNTL_LOWCOL | ((x+offset) & 0xf)); lcd_write_data(data, width); data += stride; } } #ifndef BOOTLOADER /* 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 8-pixel units! */ void lcd_blit_grey_phase(unsigned char *values, unsigned char *phases, int x, int by, int width, int bheight, int stride) { if(!display_on) return; stride <<= 3; /* 8 pixels per block */ /* Copy display bitmap to hardware */ while (bheight--) { lcd_write_command (LCD_CNTL_PAGE | (by++ & 0xf)); lcd_write_command (LCD_CNTL_HIGHCOL | (((x+offset)>>4) & 0xf)); lcd_write_command (LCD_CNTL_LOWCOL | ((x+offset) & 0xf)); lcd_grey_data(values, phases, width); values += stride; phases += stride; } } #endif /* 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; if(!display_on) return; /* Copy display bitmap to hardware */ for (y = 0; y < LCD_FBHEIGHT; y++) { lcd_write_command (LCD_CNTL_PAGE | (y & 0xf)); lcd_write_command (LCD_CNTL_HIGHCOL | ((offset >> 4) & 0xf)); lcd_write_command (LCD_CNTL_LOWCOL | (offset & 0xf)); 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; if(!display_on) return; /* The Y coordinates have to work on even 8 pixel rows */ ymax = (y + height-1) >> 3; y >>= 3; 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 (LCD_CNTL_PAGE | (y & 0xf)); lcd_write_command (LCD_CNTL_HIGHCOL | (((x+offset) >> 4) & 0xf)); lcd_write_command (LCD_CNTL_LOWCOL | ((x+offset) & 0xf)); lcd_write_data (&lcd_framebuffer[y][x], width); } }