lcd_support.c

来自「eCos操作系统源码」· C语言 代码 · 共 1,382 行 · 第 1/3 页

// Render a character at position (X,Y) with current background/foreground
static void
lcd_drawc(cyg_int8 c, int x, int y)
{
    cyg_uint8 bits;
    int l, p;

    if ((x < 0) || (x >= VISIBLE_SCREEN_WIDTH) || 
        (y < 0) || (y >= screen_height)) return;  
    for (l = 0;  l < FONT_HEIGHT;  l++) {
        bits = font_table[c-FIRST_CHAR][l]; 
        for (p = 0;  p < FONT_WIDTH;  p++) {
            if (bits & 0x01) {
                set_pixel(y*FONT_HEIGHT+l, x*FONT_WIDTH + p, fg);
            } else {
                set_pixel(y*FONT_HEIGHT+l, x*FONT_WIDTH + p, bg);
            }
            bits >>= 1;
        }
    }
}

static void
lcd_refresh(void)
{
    int row, col;

    for (row = screen_start;  row < screen_height;  row++) {
        for (col = 0;  col < VISIBLE_SCREEN_WIDTH;  col++) {
            if ((col+screen_pan) < screen_width) {
                lcd_drawc(screen[row][col+screen_pan], col, row);
            } else {
                lcd_drawc(' ', col, row);
            }
        }
    }
    if (cursor_enable) {
        lcd_drawc(CURSOR_ON, curX-screen_pan, curY);
    }
}

static void
lcd_scroll(void)
{
    int row, col;
    cyg_uint8 *c1, *c2;

    // First scroll up the virtual screen
    for (row = (screen_start+1);  row < screen_height;  row++) {
        c1 = &screen[row-1][0];
        c2 = &screen[row][0];
        for (col = 0;  col < screen_width;  col++) {
            *c1++ = *c2++;
        }
    } 
    c1 = &screen[screen_height-1][0];
    for (col = 0;  col < screen_width;  col++) {
        *c1++ = 0x20;
    }
    lcd_refresh();
}

// Draw one character at the current position
void
lcd_putc(cyg_int8 c)
{
    if (cursor_enable) {
        lcd_drawc(screen[curY][curX], curX-screen_pan, curY);
    }
    switch (c) {
    case '\r':
        curX = 0;
        break;
    case '\n':
        curY++;
        break;
    case '\b':
        curX--;
        if (curX < 0) {
            curY--;
            if (curY < 0) curY = 0;
            curX = screen_width-1;
        }
        break;
    default:
        if (((cyg_uint8)c < FIRST_CHAR) || ((cyg_uint8)c > LAST_CHAR)) c = '.';
        screen[curY][curX] = c;
        lcd_drawc(c, curX-screen_pan, curY);
        curX++;
        if (curX == screen_width) {
            curY++;
            curX = 0;
        }
    } 
    if (curY >= screen_height) {
        lcd_scroll();
        curY = (screen_height-1);
    }
    if (cursor_enable) {
        lcd_drawc(CURSOR_ON, curX-screen_pan, curY);
    }
}

// Basic LCD 'printf()' support

#include <stdarg.h>

#define is_digit(c) ((c >= '0') && (c <= '9'))

static int
_cvt(unsigned long val, char *buf, long radix, char *digits)
{
    char temp[80];
    char *cp = temp;
    int length = 0;
    if (val == 0) {
        /* Special case */
        *cp++ = '0';
    } else {
        while (val) {
            *cp++ = digits[val % radix];
            val /= radix;
        }
    }
    while (cp != temp) {
        *buf++ = *--cp;
        length++;
    }
    *buf = '\0';
    return (length);
}

static int
lcd_vprintf(void (*putc)(cyg_int8), const char *fmt0, va_list ap)
{
    char c, sign, *cp;
    int left_prec, right_prec, zero_fill, length, pad, pad_on_right;
    char buf[32];
    long val;
    while ((c = *fmt0++)) {
        cp = buf;
        length = 0;
        if (c == '%') {
            c = *fmt0++;
            left_prec = right_prec = pad_on_right = 0;
            if (c == '-') {
                c = *fmt0++;
                pad_on_right++;
            }
            if (c == '0') {
                zero_fill = TRUE;
                c = *fmt0++;
            } else {
                zero_fill = FALSE;
            }
            while (is_digit(c)) {
                left_prec = (left_prec * 10) + (c - '0');
                c = *fmt0++;
            }
            if (c == '.') {
                c = *fmt0++;
                zero_fill++;
                while (is_digit(c)) {
                    right_prec = (right_prec * 10) + (c - '0');
                    c = *fmt0++;
                }
            } else {
                right_prec = left_prec;
            }
            sign = '\0';
            switch (c) {
            case 'd':
            case 'x':
            case 'X':
                val = va_arg(ap, long);
                switch (c) {
                case 'd':
                    if (val < 0) {
                        sign = '-';
                        val = -val;
                    }
                    length = _cvt(val, buf, 10, "0123456789");
                    break;
                case 'x':
                    length = _cvt(val, buf, 16, "0123456789abcdef");
                    break;
                case 'X':
                    length = _cvt(val, buf, 16, "0123456789ABCDEF");
                    break;
                }
                break;
            case 's':
                cp = va_arg(ap, char *);
                length = strlen(cp);
                break;
            case 'c':
                c = va_arg(ap, long /*char*/);
                (*putc)(c);
                continue;
            default:
                (*putc)('?');
            }
            pad = left_prec - length;
            if (sign != '\0') {
                pad--;
            }
            if (zero_fill) {
                c = '0';
                if (sign != '\0') {
                    (*putc)(sign);
                    sign = '\0';
                }
            } else {
                c = ' ';
            }
            if (!pad_on_right) {
                while (pad-- > 0) {
                    (*putc)(c);
                }
            }
            if (sign != '\0') {
                (*putc)(sign);
            }
            while (length-- > 0) {
                (*putc)(c = *cp++);
                if (c == '\n') {
                    (*putc)('\r');
                }
            }
            if (pad_on_right) {
                while (pad-- > 0) {
                    (*putc)(' ');
                }
            }
        } else {
            (*putc)(c);
            if (c == '\n') {
                (*putc)('\r');
            }
        }
    }
}

int
_lcd_printf(char const *fmt, ...)
{
    int ret;
    va_list ap;

    va_start(ap, fmt);
    ret = lcd_vprintf(lcd_putc, fmt, ap);
    va_end(ap);
    return (ret);
}

void
lcd_setbg(int red, int green, int blue)
{
    bg = RGB_RED(red) | RGB_GREEN(green) | RGB_BLUE(blue);
}

void
lcd_setfg(int red, int green, int blue)
{
    fg = RGB_RED(red) | RGB_GREEN(green) | RGB_BLUE(blue);
}

#ifdef CYGSEM_EDB7XXX_LCD_COMM

//
// Support LCD/keyboard (PS2) as a virtual I/O channel
//   Adapted from i386/pcmb_screen.c
//

static int  _timeout = 500;

//-----------------------------------------------------------------------------
// Keyboard definitions

#define	KBDATAPORT	0x40010000		// data I/O port
#define	KBCMDPORT	0x40010001		// command port (write)
#define	KBSTATPORT	0x40010001		// status port	(read)
#define KBINRDY         0x01
#define KBOUTRDY        0x02
#define KBTXTO          0x40                    // Transmit timeout - nothing there
#define KBTEST          0xAB

// Scan codes

#define	LSHIFT		0x2a
#define	RSHIFT		0x36
#define	CTRL		0x1d
#define	ALT		0x38
#define	CAPS		0x3a
#define	NUMS		0x45

#define	BREAK		0x80

// Bits for KBFlags

#define	KBNormal	0x0000
#define	KBShift		0x0001
#define	KBCtrl		0x0002
#define KBAlt		0x0004
#define	KBIndex		0x0007	// mask for the above

#define	KBExtend	0x0010
#define	KBAck		0x0020
#define	KBResend	0x0040
#define	KBShiftL	(0x0080 | KBShift)
#define	KBShiftR	(0x0100 | KBShift)
#define	KBCtrlL		(0x0200 | KBCtrl)
#define	KBCtrlR		(0x0400 | KBCtrl)
#define	KBAltL		(0x0800 | KBAlt)
#define	KBAltR		(0x1000 | KBAlt)
#define	KBCapsLock	0x2000
#define	KBNumLock	0x4000

#define KBArrowUp       0x48
#define KBArrowRight    0x4D
#define KBArrowLeft     0x4B
#define KBArrowDown     0x50

//-----------------------------------------------------------------------------
// Keyboard Variables

static	int	KBFlags = 0;

static	CYG_BYTE	KBPending = 0xFF;

static	CYG_BYTE	KBScanTable[128][4] = {
//	Normal		Shift		Control		Alt
// 0x00
    {	0xFF,		0xFF,		0xFF,		0xFF,   },
    {	0x1b,		0x1b,		0x1b,		0xFF,	},
    {	'1',		'!',		0xFF,		0xFF,	},
    {	'2',		'"',		0xFF,		0xFF,	},
    {	'3',		'#',		0xFF,		0xFF,	},
    {	'4',		'$',		0xFF,		0xFF,	},
    {	'5',		'%',		0xFF,		0xFF,	},
    {	'6',		'^',		0xFF,		0xFF,	},
    {	'7',		'&',		0xFF,		0xFF,	},
    {	'8',		'*',		0xFF,		0xFF,	},
    {	'9',		'(',		0xFF,		0xFF,	},
    {	'0',		')',		0xFF,		0xFF,	},
    {	'-',		'_',		0xFF,		0xFF,	},
    {	'=',		'+',		0xFF,		0xFF,	},
    {	'\b',		'\b',		0xFF,		0xFF,	},
    {	'\t',		'\t',		0xFF,		0xFF,	},
// 0x10
    {	'q',		'Q',		0x11,		0xFF,	},
    {	'w',		'W',		0x17,		0xFF,	},
    {	'e',		'E',		0x05,		0xFF,	},
    {	'r',		'R',		0x12,		0xFF,	},
    {	't',		'T',		0x14,		0xFF,	},
    {	'y',		'Y',		0x19,		0xFF,	},
    {	'u',		'U',		0x15,		0xFF,	},
    {	'i',		'I',		0x09,		0xFF,	},
    {	'o',		'O',		0x0F,		0xFF,	},
    {	'p',		'P',		0x10,		0xFF,	},
    {	'[',		'{',		0x1b,		0xFF,	},
    {	']',		'}',		0x1d,		0xFF,	},
    {	'\r',		'\r',		'\n',		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	'a',		'A',		0x01,		0xFF,	},
    {	's',		'S',		0x13,		0xFF,	},
// 0x20
    {	'd',		'D',		0x04,		0xFF,	},
    {	'f',		'F',		0x06,		0xFF,	},
    {	'g',		'G',		0x07,		0xFF,	},
    {	'h',		'H',		0x08,		0xFF,	},
    {	'j',		'J',		0x0a,		0xFF,	},
    {	'k',		'K',		0x0b,		0xFF,	},
    {	'l',		'L',		0x0c,		0xFF,	},
    {	';',		':',		0xFF,		0xFF,	},
    {	0x27,		'@',		0xFF,		0xFF,	},
    {	'#',		'~',		0xFF,		0xFF,	},
    {	'`',		'~',		0xFF,		0xFF,	},
    {	'\\',		'|',		0x1C,		0xFF,	},
    {	'z',		'Z',		0x1A,		0xFF,	},
    {	'x',		'X',		0x18,		0xFF,	},
    {	'c',		'C',		0x03,		0xFF,	},
    {	'v',		'V',		0x16,		0xFF,	},
// 0x30
    {	'b',		'B',		0x02,		0xFF,	},
    {	'n',		'N',		0x0E,		0xFF,	},
    {	'm',		'M',		0x0D,		0xFF,	},
    {	',',		'<',		0xFF,		0xFF,	},
    {	'.',		'>',		0xFF,		0xFF,	},
    {	'/',		'?',		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	' ',		' ',		' ',		' ',	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xF1,		0xE1,		0xFF,		0xFF,	},
    {	0xF2,		0xE2,		0xFF,		0xFF,	},
    {	0xF3,		0xE3,		0xFF,		0xFF,	},
    {	0xF4,		0xE4,		0xFF,		0xFF,	},
    {	0xF5,		0xE5,		0xFF,		0xFF,	},
// 0x40
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},

    {	0x15,		0x15,		0x15,		0x15,	},
    {	0x10,		0x10,		0x10,		0x10,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
// 0x50
    {	0x04,		0x04,		0x04,		0x04,	},
    {	0x0e,		0x0e,		0x0e,		0x0e,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
// 0x60
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
// 0x70
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},
    {	0xFF,		0xFF,		0xFF,		0xFF,	},