fb_support.c

来自「eCos操作系统源码」· C语言 代码 · 共 681 行 · 第 1/2 页

    }
}

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);
    }
}

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);
}


static int  _timeout = 500;


static int
_hexdigit(char c)
{
    if ((c >= '0') && (c <= '9')) {
        return c - '0';
    } else
    if ((c >= 'A') && (c <= 'F')) {
        return (c - 'A') + 0x0A;
    } else
    if ((c >= 'a') && (c <= 'f')) {
        return (c - 'a') + 0x0a;
    }
}

static int
_hex(char *cp)
{
    return (_hexdigit(*cp)<<4) | _hexdigit(*(cp+1));
}

static unsigned short
parse_color(char *cp)
{
    int red, green, blue;

    while (*cp && (*cp != 'c')) cp++;
    if (cp) {
        cp += 2;
        if (*cp == '#') {
            red = _hex(cp+1);
            green = _hex(cp+3);
            blue = _hex(cp+5);
#ifdef USE_RGB565
            return RGB_RED(red>>3) | RGB_GREEN(green>>2) | RGB_BLUE(blue>>3);
#else
            return RGB_RED(red>>3) | RGB_GREEN(green>>3) | RGB_BLUE(blue>>3);
#endif
        } else {
            // Should be "None"
            return 0xFFFF;
        }
    } else {
        return 0xFFFF;
    }
}

#ifndef CYGINT_ISO_STDIO_FORMATTED_IO
static int
get_int(char **_cp)
{
    char *cp = *_cp;
    char c;
    int val = 0;
    
    while ((c = *cp++) && (c != ' ')) {
        if ((c >= '0') && (c <= '9')) {
            val = val * 10 + (c - '0');
        } else {
            return -1;
        }
    }
    *_cp = cp;
    return val;
}
#endif

int
show_xpm(char *xpm[], int screen_pos)
{
    int i, row, col, offset;
    char *cp;
    int nrows, ncols, nclrs;
    unsigned short colors[256];  // Mapped by character index

    cp = xpm[0];
#ifdef CYGINT_ISO_STDIO_FORMATTED_IO
    if (sscanf(cp, "%d %d %d", &ncols, &nrows, &nclrs) != 3) {
#else
    if (((ncols = get_int(&cp)) < 0) ||
        ((nrows = get_int(&cp)) < 0) ||
        ((nclrs = get_int(&cp)) < 0)) {

#endif
        diag_printf("Can't parse XPM data, sorry\n");
        return 0;
    }
    // printf("%d rows, %d cols, %d colors\n", nrows, ncols, nclrs);

    for (i = 0;  i < 256;  i++) {
        colors[i] = 0x0000;
    }
    for (i = 0;  i < nclrs;  i++) {
        cp = xpm[i+1];
        colors[(unsigned int)*cp] = parse_color(&cp[1]);
        // printf("Color[%c] = %x\n", *cp, colors[(unsigned int)*cp]);
    }

#ifdef LOGO_AT_TOP
    offset = screen_pos;
#else
    offset = screen_pos-nrows;
#endif
    for (row = 0;  row < nrows;  row++) {            
        cp = xpm[nclrs+1+row];        
        for (col = 0;  col < ncols;  col++) {
            set_pixel(row+offset, col, colors[(unsigned int)*cp++]);
        }
    }
#ifdef LOGO_AT_TOP
    screen_start = (nrows + (FONT_HEIGHT-1))/FONT_HEIGHT;
    return offset+nrows;
#else    
    screen_height = offset / FONT_HEIGHT;
    return offset;
#endif
}


void fb_init(int depth)
{
    int cable = dcfb_cable_check();
    unsigned long **parm_list[4] = {
        dc_parm_vga, dc_parm_vga, dc_parm_interlace, dc_parm_composite,
    };
    unsigned long **dc_parms = parm_list[cable];

    unsigned long a, d, *p;
  
    switch(depth) {
    default:
    case 16:
        p = dc_parms[0];
        break;
    case 32:
        p = dc_parms[1];
        break;
    }
  
    HAL_WRITE_UINT32(RESETREG, 0);
    HAL_WRITE_UINT32(BORDERRGB, 0);

    while(1) {
        a = *p++; d = *p++;
        if (!a) break;
        HAL_WRITE_UINT32(a, d);
    }

    lcd_clear();
}


static cyg_bool
lcd_comm_getc_nonblock(void* __ch_data, cyg_uint8* ch)
{
    return false;
}

static cyg_uint8
lcd_comm_getc(void* __ch_data)
{
    cyg_uint8 ch;

    while (!lcd_comm_getc_nonblock(__ch_data, &ch)) ;
    return ch;
}

static void
lcd_comm_putc(void* __ch_data, cyg_uint8 c)
{
    lcd_putc(c);
}

static void
lcd_comm_write(void* __ch_data, const cyg_uint8* __buf, cyg_uint32 __len)
{
}

static void
lcd_comm_read(void* __ch_data, cyg_uint8* __buf, cyg_uint32 __len)
{
}

static cyg_bool
lcd_comm_getc_timeout(void* __ch_data, cyg_uint8* ch)
{
    int delay_count;
    cyg_bool res;

    delay_count = _timeout * 10; // delay in .1 ms steps
    for(;;) {
        res = lcd_comm_getc_nonblock(__ch_data, ch);
        if (res || 0 == delay_count--)
            break;
        CYGACC_CALL_IF_DELAY_US(100);
    }
    return res;
}

static int
lcd_comm_control(void *__ch_data, __comm_control_cmd_t __func, ...)
{
    int ret = 0;

    switch (__func) {
    case __COMMCTL_SET_TIMEOUT:
    {
        va_list ap;
        va_start(ap, __func);
        ret = _timeout;
        _timeout = va_arg(ap, cyg_uint32);
        va_end(ap);
	break;
    }
    case __COMMCTL_FLUSH_OUTPUT:
	break;
    default:
        break;
    }

    return ret;
}

static int
lcd_comm_isr(void *__ch_data, int* __ctrlc, 
           CYG_ADDRWORD __vector, CYG_ADDRWORD __data)
{
    return 0;
}

void fb_comm_init(void)
{
    static int init = 0;
  
    if (!init) {
        hal_virtual_comm_table_t* comm;
        int cur = CYGACC_CALL_IF_SET_CONSOLE_COMM(CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT);
    
        // Setup procs in the vector table
        CYGACC_CALL_IF_SET_CONSOLE_COMM(1);
        comm = CYGACC_CALL_IF_CONSOLE_PROCS();
        //CYGACC_COMM_IF_CH_DATA_SET(*comm, chan);
        CYGACC_COMM_IF_WRITE_SET(*comm, lcd_comm_write);
        CYGACC_COMM_IF_READ_SET(*comm, lcd_comm_read);
        CYGACC_COMM_IF_PUTC_SET(*comm, lcd_comm_putc);
        CYGACC_COMM_IF_GETC_SET(*comm, lcd_comm_getc);
        CYGACC_COMM_IF_CONTROL_SET(*comm, lcd_comm_control);
        CYGACC_COMM_IF_DBG_ISR_SET(*comm, lcd_comm_isr);
        CYGACC_COMM_IF_GETC_TIMEOUT_SET(*comm, lcd_comm_getc_timeout);
    
        // Restore original console
        CYGACC_CALL_IF_SET_CONSOLE_COMM(cur);
        
        init = 1;
    }
}

//-----------------------------------------------------------------------------
// End of fb_support.c