/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * $Id$ * * Copyright (C) 2002 by Alan Korr * * All files in this archive are subject to the GNU General Public License. * See the file COPYING in the source tree root for full license agreement. * * 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" /*** definitions ***/ #define LCD_SET_LOWER_COLUMN_ADDRESS ((char)0x00) #define LCD_SET_HIGHER_COLUMN_ADDRESS ((char)0x10) #define LCD_SET_INTERNAL_REGULATOR_RESISTOR_RATIO ((char)0x20) #define LCD_SET_POWER_CONTROL_REGISTER ((char)0x28) #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_LCD_BIAS ((char)0xA2) #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_BIAS_TC_OSC ((char)0xA9) #define LCD_SET_1OVER4_BIAS_RATIO ((char)0xAA) #define LCD_SET_INDICATOR_OFF ((char)0xAC) #define LCD_SET_INDICATOR_ON ((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_TOTAL_FRAME_PHASES ((char)0xD2) #define LCD_SET_DISPLAY_OFFSET ((char)0xD3) #define LCD_SET_READ_MODIFY_WRITE_MODE ((char)0xE0) #define LCD_SOFTWARE_RESET ((char)0xE2) #define LCD_NOP ((char)0xE3) #define LCD_SET_END_OF_READ_MODIFY_WRITE_MODE ((char)0xEE) /* LCD command codes */ #define LCD_CNTL_RESET 0xe2 /* Software reset */ #define LCD_CNTL_POWER 0x2f /* Power control */ #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 */ /*** driver routines ***/ void lcd_write_command(int cmd) { while ((LCDSTAT & 3) != 3); LCDCMD = cmd; } void lcd_write_data( const unsigned char* data, int count ) { int i; for (i=0; i < count; i++) { while ((LCDSTAT & 3) != 3); LCDDATA = data[i]; } } /*** hardware configuration ***/ int lcd_default_contrast(void) { return 45; } void lcd_set_contrast(int val) { lcd_write_command(LCD_CNTL_CONTRAST); 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 | 0x01); lcd_write_command(LCD_SET_COM_OUTPUT_SCAN_DIRECTION | 0x08); } } void lcd_init_device(void) { LCDREG10 = 0xf; LCDREG04 = 0x4084; /* inits like the original firmware */ lcd_write_command(LCD_SOFTWARE_RESET); lcd_write_command(LCD_SET_INTERNAL_REGULATOR_RESISTOR_RATIO + 4); lcd_write_command(LCD_SET_LCD_BIAS); lcd_write_command(LCD_SET_POWER_CONTROL_REGISTER + 7); /* power control register: op-amp=1, regulator=1, booster=1 */ lcd_write_command(LCD_SET_DISPLAY_ON); lcd_write_command(LCD_SET_NORMAL_DISPLAY); lcd_set_flip(false); lcd_write_command(LCD_SET_DISPLAY_START_LINE + 0); lcd_set_contrast(lcd_default_contrast()); lcd_write_command(LCD_SET_PAGE_ADDRESS); lcd_write_command(LCD_SET_LOWER_COLUMN_ADDRESS + 0); lcd_write_command(LCD_SET_HIGHER_COLUMN_ADDRESS + 0); lcd_clear_display(); 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(const unsigned char* data, int x, int by, int width, int bheight, int stride) { /* Copy display bitmap to hardware */ while (bheight--) { lcd_write_command (LCD_CNTL_PAGE | (by++ & 0xf)); lcd_write_command (LCD_CNTL_HIGHCOL | (((x+4)>>4) & 0xf)); lcd_write_command (LCD_CNTL_LOWCOL | ((x+4) & 0xf)); lcd_write_data(data, width); data += 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_HEIGHT/8; y++) { lcd_write_command (LCD_CNTL_PAGE | (y & 0xf)); lcd_write_command (LCD_CNTL_HIGHCOL); lcd_write_command (LCD_CNTL_LOWCOL | 4); 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) >> 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_HEIGHT/8) ymax = LCD_HEIGHT/8-1; /* 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+4) >> 4) & 0xf)); lcd_write_command (LCD_CNTL_LOWCOL | ((x+4) & 0xf)); lcd_write_data (&lcd_framebuffer[y][x], width); } }