/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * * Copyright (C) 2007 by Jens Arnold * * 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_POWER_SAVE 0xa8 #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 | 0); lcd_write_command(LCD_CNTL_COMMON_OUTPUT_STATUS | 1); lcd_write_command_ex(LCD_CNTL_DUTY_SET, 0x20, 2); } else { 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, 1); } } void lcd_init_device(void) { /* LCD Reset */ and_l(~0x00000010, &GPIO1_OUT); or_l(0x00000010, &GPIO1_ENABLE); or_l(0x00000010, &GPIO1_FUNCTION); sleep(1); or_l(0x00000010, &GPIO1_OUT); sleep(1); lcd_write_command(LCD_CNTL_ON_OFF | 1); /* LCD ON */ lcd_write_command(LCD_CNTL_OFF_MODE | 1); /* OFF -> VCC on drivers */ lcd_write_command(LCD_CNTL_REVERSE | 0); /* Reverse OFF */ lcd_write_command(LCD_CNTL_ALL_LIGHTING | 0); /* Normal */ lcd_write_command(LCD_CNTL_COMMON_OUTPUT_STATUS | 0); /* Normal dir */ lcd_write_command_ex(LCD_CNTL_DISPLAY_START_LINE, 4, -1); lcd_write_command(LCD_CNTL_COLUMN_ADDRESS_DIR | 1); /* Reverse */ lcd_write_command_ex(LCD_CNTL_DISPLAY_MODE, 0, -1); /* Greyscale mode */ lcd_write_command_ex(LCD_CNTL_GRAY_SCALE_PATTERN, 0x53, -1); lcd_write_command_ex(LCD_CNTL_DUTY_SET, 0x20, 1); lcd_write_command_ex(LCD_CNTL_ELECTRONIC_VOLUME, 40, -1); lcd_write_command(LCD_CNTL_OSC_ON_OFF | 1); /* Oscillator ON */ lcd_write_command(LCD_CNTL_POWER_SAVE | 0); lcd_write_command_ex(LCD_CNTL_VOLTAGE_SELECT, 3, -1); lcd_write_command_ex(LCD_CNTL_POWER_CONTROL, 0x17, -1); lcd_write_command_ex(LCD_CNTL_OSC_FREQUENCY, 3, -1); lcd_write_command(LCD_CNTL_NLINE_ON_OFF | 1); /* N-line ON */ lcd_write_command_ex(LCD_CNTL_LINE_INVERT_DRIVE, 0x10, -1); lcd_write_command_ex(LCD_CNTL_TEMP_GRADIENT_SELECT, 0, -1); 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) { 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; void* (*fbaddr)(int x, int y) = FB_CURRENTVP_BUFFER->get_address_fn; /* 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 (fbaddr(0,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; void* (*fbaddr)(int x, int y) = FB_CURRENTVP_BUFFER->get_address_fn; /* 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 (fbaddr(x,y), width); } }