lcd-recorder.c

编译后直接运行的ＭＰ３播放器全部Ｃ语言源代码 一个包含FAT文件系统、系统引导 Boot、FLASH Driver等内容的

/***************************************************************************
 *             __________               __   ___.
 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
 *                     \/            \/     \/    \/            \/
 * $Id: lcd-recorder.c,v 1.26 2004/01/13 14:59:51 bagder Exp $
 *
 * 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"

#ifdef HAVE_LCD_BITMAP

#include "lcd.h"
#include "kernel.h"
#include "thread.h"
#include <string.h>
#include <stdlib.h>
#include "file.h"
#include "debug.h"
#include "system.h"
#include "font.h"
#include "hwcompat.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 */

#define SCROLL_SPACING 3

#define SCROLLABLE_LINES 10

struct scrollinfo {
    char line[MAX_PATH + LCD_WIDTH/2 + SCROLL_SPACING + 2];
    int len;    /* length of line in chars */
    int width;  /* length of line in pixels */
    int offset;
    int startx;
    int starty;
    bool backward; /* scroll presently forward or backward? */
    bool bidir;
    bool invert; /* invert the scrolled text */
    long start_tick;
};

static volatile int scrolling_lines=0; /* Bitpattern of which lines are scrolling */

static void scroll_thread(void);
static char scroll_stack[DEFAULT_STACK_SIZE];
static char scroll_name[] = "scroll";
static char scroll_speed = 8; /* updates per second */
static int scroll_delay = HZ/2; /* ticks delay before start */
static char scroll_step = 6;  /* pixels per scroll step */
static int bidir_limit = 50;  /* percent */
static struct scrollinfo scroll[SCROLLABLE_LINES];
static int xmargin = 0;
static int ymargin = 0;
static int curfont = FONT_SYSFIXED;
#ifndef SIMULATOR
static int xoffset = 0; /* needed for flip */
#endif

unsigned char lcd_framebuffer[LCD_HEIGHT/8][LCD_WIDTH];

/* All zeros and ones bitmaps for area filling */
static unsigned char zeros[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
static unsigned char ones[8]  = { 0xff, 0xff, 0xff, 0xff,
                                  0xff, 0xff, 0xff, 0xff};

int lcd_default_contrast(void)
{
#ifdef SIMULATOR
    return 30;
#else
    return (read_hw_mask() & LCD_CONTRAST_BIAS) ? 31 : 49;
#endif
}

#ifdef SIMULATOR

void lcd_init(void)
{
    create_thread(scroll_thread, scroll_stack,
                  sizeof(scroll_stack), scroll_name);
}

#else

/*
 * Initialize LCD
 */
void lcd_init (void)
{
    /* Initialize PB0-3 as output pins */
    PBCR2 &= 0xff00; /* MD = 00 */
    PBIOR |= 0x000f; /* IOR = 1 */

    /* inits like the original firmware */
    lcd_write(true, LCD_SOFTWARE_RESET);
    lcd_write(true, LCD_SET_INTERNAL_REGULATOR_RESISTOR_RATIO + 4);
    lcd_write(true, LCD_SET_1OVER4_BIAS_RATIO + 0); /* force 1/4 bias: 0 */
    lcd_write(true, LCD_SET_POWER_CONTROL_REGISTER + 7); /* power control register: op-amp=1, regulator=1, booster=1 */
    lcd_write(true, LCD_SET_DISPLAY_ON);
    lcd_write(true, LCD_SET_NORMAL_DISPLAY);
    lcd_write(true, LCD_SET_SEGMENT_REMAP + 1); /* mirror horizontal: 1 */
    lcd_write(true, LCD_SET_COM_OUTPUT_SCAN_DIRECTION + 8); /* mirror vertical: 1 */
    lcd_write(true, LCD_SET_DISPLAY_START_LINE + 0);
    lcd_set_contrast(lcd_default_contrast());
    lcd_write(true, LCD_SET_PAGE_ADDRESS);
    lcd_write(true, LCD_SET_LOWER_COLUMN_ADDRESS + 0);
    lcd_write(true, LCD_SET_HIGHER_COLUMN_ADDRESS + 0);

    lcd_clear_display();
    lcd_update();
    create_thread(scroll_thread, scroll_stack,
                  sizeof(scroll_stack), scroll_name);
}


/* Performance function that works with an external buffer
   note that y and height are in 8-pixel units! */
void lcd_blit (unsigned char* p_data, int x, int y, int width, int height, int stride)
{
    /* Copy display bitmap to hardware */
    while (height--)
    {
        lcd_write (true, LCD_CNTL_PAGE | (y++ & 0xf));
        lcd_write (true, LCD_CNTL_HIGHCOL | (((x+xoffset)>>4) & 0xf));
        lcd_write (true, LCD_CNTL_LOWCOL | ((x+xoffset) & 0xf));

        lcd_write_data(p_data, width);
        p_data += stride;
    } 
}


/*
 * Update the display.
 * This must be called after all other LCD functions that change the display.
 */
void lcd_update (void) __attribute__ ((section (".icode")));
void lcd_update (void)
{
    int y;

    /* Copy display bitmap to hardware */
    for (y = 0; y < LCD_HEIGHT/8; y++)
    {
        lcd_write (true, LCD_CNTL_PAGE | (y & 0xf));
        lcd_write (true, LCD_CNTL_HIGHCOL | ((xoffset>>4) & 0xf));
        lcd_write (true, LCD_CNTL_LOWCOL | (xoffset & 0xf));

        lcd_write_data (lcd_framebuffer[y], LCD_WIDTH);
    }
}

/*
 * Update a fraction of the display.
 */
void lcd_update_rect (int, int, int, int) __attribute__ ((section (".icode")));
void lcd_update_rect (int x_start, int y,
                      int width, int height)
{
    int ymax;

    /* The Y coordinates have to work on even 8 pixel rows */
    ymax = (y + height-1)/8;
    y /= 8;

    if(x_start + width > LCD_WIDTH)
        width = LCD_WIDTH - x_start;
    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 (true, LCD_CNTL_PAGE | (y & 0xf));
        lcd_write (true, LCD_CNTL_HIGHCOL | (((x_start+xoffset)>>4) & 0xf));
        lcd_write (true, LCD_CNTL_LOWCOL | ((x_start+xoffset) & 0xf));

        lcd_write_data (&lcd_framebuffer[y][x_start], width);
    }
}

void lcd_set_contrast(int val)
{
    lcd_write(true, LCD_CNTL_CONTRAST);
    lcd_write(true, val);
}

void lcd_set_invert_display(bool yesno)
{
    if (yesno) 
        lcd_write(true, LCD_SET_REVERSE_DISPLAY);
    else 
        lcd_write(true, LCD_SET_NORMAL_DISPLAY);
}

/* turn the display upside down (call lcd_update() afterwards) */
void lcd_set_flip(bool yesno)
{
    if (yesno) 
    {
        lcd_write(true, LCD_SET_SEGMENT_REMAP);
        lcd_write(true, LCD_SET_COM_OUTPUT_SCAN_DIRECTION);
        xoffset = 132 - LCD_WIDTH; /* 132 colums minus the 112 we have */
    }
    else 
    {
        lcd_write(true, LCD_SET_SEGMENT_REMAP | 0x01);
        lcd_write(true, LCD_SET_COM_OUTPUT_SCAN_DIRECTION | 0x08);
        xoffset = 0;
    }
}

/**
 * Rolls up the lcd display by the specified amount of lines.
 * Lines that are rolled out over the top of the screen are
 * rolled in from the bottom again. This is a hardware 
 * remapping only and all operations on the lcd are affected.
 * -> 
 * @param int lines - The number of lines that are rolled. 
 *  The value must be 0 <= pixels < LCD_HEIGHT.
 */
void lcd_roll(int lines)
{
    lcd_write(true, LCD_SET_DISPLAY_START_LINE | (lines & (LCD_HEIGHT-1)));
}

#endif /* SIMULATOR */

void lcd_clear_display (void)
{
    memset (lcd_framebuffer, 0, sizeof lcd_framebuffer);
    scrolling_lines = 0;
}

void lcd_setmargins(int x, int y)
{
    xmargin = x;
    ymargin = y;
}

int lcd_getxmargin(void)
{
    return xmargin;
}

int lcd_getymargin(void)
{
    return ymargin;
}

void lcd_setfont(int newfont)
{
    curfont = newfont;
}

int lcd_getstringsize(unsigned char *str, int *w, int *h)
{
    struct font* pf = font_get(curfont);
    int ch;
    int width = 0;

    while((ch = *str++)) {
        /* check input range*/
        if (ch < pf->firstchar || ch >= pf->firstchar+pf->size)
            ch = pf->defaultchar;
        ch -= pf->firstchar;

        /* get proportional width and glyph bits*/
        width += pf->width? pf->width[ch]: pf->maxwidth;
    }
    if ( w )
        *w = width;
    if ( h )
        *h = pf->height;
    return width;
}

/* put a string at a given char position */
void lcd_puts(int x, int y, unsigned char *str)
{
    lcd_puts_style(x, y, str, STYLE_DEFAULT);
}

void lcd_puts_style(int x, int y, unsigned char *str, int style)
{
    int xpos,ypos,w,h;
    struct scrollinfo* s;
    int index;

#if defined(SIMULATOR) && defined(HAVE_LCD_CHARCELLS)
    /* We make the simulator truncate the string if it reaches the right edge,
       as otherwise it'll wrap. The real target doesn't wrap. */

    char buffer[12];
    if(strlen(str)+x > 11 ) {
        strncpy(buffer, str, sizeof buffer);
        buffer[11-x]=0;
        str = buffer;
    }
    xmargin = 0;
    ymargin = 8;
#endif

    /* make sure scrolling is turned off on the line we are updating */
    if (scrolling_lines) {
        for (index = 0; index < SCROLLABLE_LINES; index++) {
            if (scrolling_lines&(1<<index)) {
                s = &scroll[index];
                if (s->starty == y) {
                    scrolling_lines &= ~(1<<index);
                    break;
                }
            }
        }
    }

    if(!str || !str[0])
        return;

    lcd_getstringsize(str, &w, &h);
    xpos = xmargin + x*w / strlen(str);
    ypos = ymargin + y*h;
    lcd_putsxy(xpos, ypos, str);
    lcd_clearrect(xpos + w, ypos, LCD_WIDTH - (xpos + w), h);
    if (style & STYLE_INVERT)
        lcd_invertrect(xpos, ypos, LCD_WIDTH - xpos, h);

#if defined(SIMULATOR) && defined(HAVE_LCD_CHARCELLS)
    lcd_update();
#endif
}

/* put a string at a given pixel position, skipping first ofs pixel columns */
static void lcd_putsxyofs(int x, int y, int ofs, unsigned char *str)
{
    int ch;
    struct font* pf = font_get(curfont);

    while ((ch = *str++) != '\0' && x < LCD_WIDTH)
    {
        int width;

        /* check input range */
        if (ch < pf->firstchar || ch >= pf->firstchar+pf->size)
            ch = pf->defaultchar;
        ch -= pf->firstchar;

        /* no partial-height drawing for now... */
        if (y + pf->height > LCD_HEIGHT)
            break;

        /* get proportional width and glyph bits */
        width = pf->width ? pf->width[ch] : pf->maxwidth;
        width = MIN (width, LCD_WIDTH - x);

        if (ofs != 0)
        {
            if (ofs > width)
            {
                ofs -= width;
                continue;
            }
            width -= ofs;
        }

        if (width > 0)
        {
            int rows = (pf->height + 7) / 8;
            bitmap_t* bits = pf->bits + 
                (pf->offset ? pf->offset[ch] : (pf->height * ch));
            lcd_bitmap (((unsigned char*) bits) + ofs*rows, x, y,
                        width, pf->height, true);
            x += width;
        }
        ofs = 0;
    }
}

/* put a string at a given pixel position */
void lcd_putsxy(int x, int y, unsigned char *str)
{
    lcd_putsxyofs(x, y, 0, str);
}

/*
 * All bitmaps have this format:
 * Bits within a byte are arranged veritcally, LSB at top.
 * Bytes are stored in column-major format, with byte 0 at top left,
 * byte 1 is 2nd from top, etc.  Bytes following left-most column
 * starts 2nd left column, etc.
 *
 * Note: The HW takes bitmap bytes in row-major order.
 *
 * Memory copy of display bitmap
 */

/*
 * Draw a bitmap at (x, y), size (nx, ny)
 * if 'clear' is true, clear destination area first
 */
void lcd_bitmap (unsigned char *src, int x, int y, int nx, int ny,
                 bool clear) __attribute__ ((section (".icode")));
void lcd_bitmap (unsigned char *src, int x, int y, int nx, int ny,
                 bool clear)
{
    unsigned char *dst;
    unsigned char *dst2;
    unsigned int data, mask, mask2, mask3, mask4;
    int shift;

    if (((unsigned)x >= LCD_WIDTH) || ((unsigned)y >= LCD_HEIGHT))
        return;
    if (((unsigned)(x + nx)) >= LCD_WIDTH)
        nx = LCD_WIDTH - x;
    if (((unsigned)(y + ny)) >= LCD_HEIGHT)
        ny = LCD_HEIGHT - y;      

    shift = y & 7;
    dst2 = &lcd_framebuffer[y/8][x];

    /* short cut for byte aligned match (e.g. standard text) */
    if (!shift && clear && ny==8)
    {
        memcpy(dst2, src, nx);
        return;
    }