asc_cosd.h

一个msp430与HGO12864加4*4键盘的菜单程序... ...！

/*--  文字:  O 25--*/
/*--  宋体12;  此字体下对应的点阵为：宽x高=8x16   --*/
0xE0,0x10,0x08,0x08,0x08,0x10,0xE0,0x00,0x0F,0x10,0x20,0x20,0x20,0x10,0x0F,0x00,

/*--  文字:  P 26--*/
/*--  宋体12;  此字体下对应的点阵为：宽x高=8x16   --*/
0x08,0xF8,0x08,0x08,0x08,0x08,0xF0,0x00,0x20,0x3F,0x21,0x01,0x01,0x01,0x00,0x00,

/*--  文字:  Q 27--*/
/*--  宋体12;  此字体下对应的点阵为：宽x高=8x16   --*/
0xE0,0x10,0x08,0x08,0x08,0x10,0xE0,0x00,0x0F,0x18,0x24,0x24,0x38,0x50,0x4F,0x00,

/*--  文字:  R 28--*/
/*--  宋体12;  此字体下对应的点阵为：宽x高=8x16   --*/
0x08,0xF8,0x88,0x88,0x88,0x88,0x70,0x00,0x20,0x3F,0x20,0x00,0x03,0x0C,0x30,0x20,

/*--  文字:  S 29--*/
/*--  宋体12;  此字体下对应的点阵为：宽x高=8x16   --*/
0x00,0x70,0x88,0x08,0x08,0x08,0x38,0x00,0x00,0x38,0x20,0x21,0x21,0x22,0x1C,0x00,

/*--  文字:  T 30--*/
/*--  宋体12;  此字体下对应的点阵为：宽x高=8x16   --*/
0x18,0x08,0x08,0xF8,0x08,0x08,0x18,0x00,0x00,0x00,0x20,0x3F,0x20,0x00,0x00,0x00,

/*--  文字:  U 31--*/
/*--  宋体12;  此字体下对应的点阵为：宽x高=8x16   --*/
0x08,0xF8,0x08,0x00,0x00,0x08,0xF8,0x08,0x00,0x1F,0x20,0x20,0x20,0x20,0x1F,0x00,

/*--  文字:  V 32--*/
/*--  宋体12;  此字体下对应的点阵为：宽x高=8x16   --*/
0x08,0x78,0x88,0x00,0x00,0xC8,0x38,0x08,0x00,0x00,0x07,0x38,0x0E,0x01,0x00,0x00,

/*--  文字:  W 33--*/
/*--  宋体12;  此字体下对应的点阵为：宽x高=8x16   --*/
0xF8,0x08,0x00,0xF8,0x00,0x08,0xF8,0x00,0x03,0x3C,0x07,0x00,0x07,0x3C,0x03,0x00,

/*--  文字:  X 34--*/
/*--  宋体12;  此字体下对应的点阵为：宽x高=8x16   --*/
0x08,0x18,0x68,0x80,0x80,0x68,0x18,0x08,0x20,0x30,0x2C,0x03,0x03,0x2C,0x30,0x20,

/*--  文字:  Y 35--*/
/*--  宋体12;  此字体下对应的点阵为：宽x高=8x16   --*/
0x08,0x38,0xC8,0x00,0xC8,0x38,0x08,0x00,0x00,0x00,0x20,0x3F,0x20,0x00,0x00,0x00,

/*--  文字:  Z 36--*/
/*--  宋体12;  此字体下对应的点阵为：宽x高=8x16   --*/
0x10,0x08,0x08,0x08,0xC8,0x38,0x08,0x00,0x20,0x38,0x26,0x21,0x20,0x20,0x18,0x00,
};
const unsigned char logo[]={
/*--  调入了一幅图像：C:\Documents and Settings\Administrator\桌面\未命名.bmp  --*/
/*--  宽度x高度=128x64  --*/
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0xC0,
0xE0,0xF0,0x7E,0x7E,0xFE,0xEC,0xE0,0xC0,0xC0,0xC0,0xC0,0xC0,0x00,0xC0,0xFE,0xFE,
0x3E,0x0E,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x80,0xC0,0xF0,0xFF,0xFF,0x9F,0xC7,0xC0,0xC0,0xC0,0xC0,0x80,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0xC0,0xF8,0xFF,0xFF,
0xCF,0xC2,0xC0,0xE0,0xE0,0xC0,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x08,0x18,0x1C,0x1C,0xCC,0xCC,0xCC,0xEC,0x76,
0x3E,0x1E,0x1E,0x0E,0x0E,0x04,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x60,0x60,0x30,0x38,0x1C,0xFC,0xFE,0xFF,0x9F,0x8B,
0xED,0xFC,0xFC,0x3C,0x08,0x01,0xE1,0xF9,0xFF,0x3F,0x07,0xF0,0xFE,0xFF,0x1F,0x01,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x03,0x07,0x87,0xE3,0xF3,0x7B,
0x3F,0x1F,0x0F,0x03,0x01,0x81,0xE1,0xF9,0xFF,0x3F,0x0F,0x03,0x01,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0xFF,0xFF,0xFF,0x8F,0x99,0xF9,0xFF,0xFF,0xCF,0xCF,0xCC,
0xF4,0xFC,0x7F,0x1F,0x0F,0x83,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x18,
0x18,0x18,0x18,0x18,0x1C,0x0C,0x0C,0x0C,0x0C,0x8C,0xFC,0xFF,0xFF,0x1F,0x06,0x06,
0x06,0x07,0x07,0x07,0x07,0x07,0x07,0x06,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x1F,0x3F,0x3F,0x38,0x33,0x33,
0x3B,0x3D,0x1F,0x1F,0x01,0x30,0x71,0xF1,0xF0,0xFC,0x7F,0x3F,0x07,0x00,0x00,0x00,
0x00,0x00,0x40,0x40,0x60,0x70,0x30,0x38,0x1C,0x0E,0x0E,0x07,0x03,0x01,0x00,0x98,
0xF8,0xF8,0x78,0x7C,0x3F,0x1F,0x07,0x03,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x01,0x01,0x01,0x1D,0x3F,0x7F,0x77,0x70,0x60,0x60,0x71,
0x71,0x70,0x70,0x7C,0x3F,0x3F,0x1F,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x10,0x30,0xF0,0xF0,0xF0,0xFC,0x7F,0x1F,0x07,0x01,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,
0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,
0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,
0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,
0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,
0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,
0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,
0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
};

/*  西文字符库定义  */
const unsigned char success[768]={ 
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,    /*" "=00H*/
0x00,0x00,0x00,0x4F,0x00,0x00,0x00,0x00,    /*"!"=01H*/
0x00,0x00,0x07,0x00,0x07,0x00,0x00,0x00,    /*"""=02h*/
0x00,0x14,0x7F,0x14,0x7F,0x14,0x00,0x00,    /*"#"=03h*/
0x00,0x24,0x2A,0x7F,0x2A,0x12,0x00,0x00,    /*"$"=04h*/
0x00,0x23,0x13,0x08,0x64,0x62,0x00,0x00,    /*"%"=05h*/
0x00,0x36,0x49,0x55,0x22,0x50,0x00,0x00,    /*"&"=06h*/
0x00,0x00,0x05,0x03,0x00,0x00,0x00,0x00,    /*"'"=07h*/
0x00,0x00,0x1C,0x22,0x41,0x00,0x00,0x00,    /*"("=08h*/
0x00,0x00,0x41,0x22,0x1C,0x00,0x00,0x00,    /*")"=09h*/
0x00,0x14,0x08,0x3E,0x08,0x14,0x00,0x00,    /*"*"=0Ah*/
0x00,0x08,0x08,0x3E,0x08,0x08,0x00,0x00,    /*"+"=0Bh*/
0x00,0x00,0x50,0x30,0x00,0x00,0x00,0x00,    /*";"=0Ch*/
0x00,0x08,0x08,0x08,0x08,0x08,0x00,0x00,    /*"-"=0Dh*/
0x00,0x00,0x60,0x60,0x00,0x00,0x00,0x00,    /*"."=0Eh*/
0x00,0x20,0x10,0x08,0x04,0x02,0x00,0x00,    /*"/"=0Fh*/
0x00,0x3E,0x51,0x49,0x45,0x3E,0x00,0x00,    /*"0"=10h*/
0x00,0x00,0x42,0x7F,0x40,0x00,0x00,0x00,    /*"1"=11h*/
0x00,0x42,0x61,0x51,0x49,0x46,0x00,0x00,    /*"2"=12h*/
0x00,0x21,0x41,0x45,0x4B,0x31,0x00,0x00,    /*"3"=13h*/
0x00,0x18,0x14,0x12,0x7F,0x10,0x00,0x00,    /*"4"=14h*/
0x00,0x27,0x45,0x45,0x45,0x39,0x00,0x00,    /*"5"=15h*/
0x00,0x3C,0x4A,0x49,0x49,0x30,0x00,0x00,    /*"6"=16h*/
0x00,0x01,0x01,0x79,0x05,0x03,0x00,0x00,    /*"7"=17h*/
0x00,0x36,0x49,0x49,0x49,0x36,0x00,0x00,    /*"8"=18h*/
0x00,0x06,0x49,0x49,0x29,0x1E,0x00,0x00,    /*"9"=19h*/
0x00,0x00,0x36,0x36,0x00,0x00,0x00,0x00,    /*":"=1Ah*/
0x00,0x00,0x56,0x36,0x00,0x00,0x00,0x00,    /*";"=1Bh*/
0x00,0x08,0x14,0x22,0x41,0x00,0x00,0x00,    /*"<"=1Ch*/
0x00,0x14,0x14,0x14,0x14,0x14,0x00,0x00,    /*"="=1Dh*/
0x00,0x00,0x41,0x22,0x14,0x08,0x00,0x00,    /*">"=1Eh*/
0x00,0x02,0x01,0x51,0x09,0x06,0x00,0x00,    /*"?"=1Fh*/
0x00,0x32,0x49,0x79,0x41,0x3E,0x00,0x00,    /*"@"=20h*/
0x00,0x7E,0x11,0x11,0x11,0x7E,0x00,0x00,    /*"A"=21h*/
0x00,0x41,0x7F,0x49,0x49,0x36,0x00,0x00,    /*"B"=22h*/
0x00,0x3E,0x41,0x41,0x41,0x22,0x00,0x00,    /*"C"=23h*/
0x00,0x41,0x7F,0x41,0x41,0x3E,0x00,0x00,    /*"D"=24h*/
0x00,0x7F,0x49,0x49,0x49,0x49,0x00,0x00,    /*"E"=25h*/
0x00,0x7F,0x09,0x09,0x09,0x01,0x00,0x00,    /*"F"=26h*/
0x00,0x3E,0x41,0x41,0x49,0x7A,0x00,0x00,    /*"G"=27h*/
0x00,0x7F,0x08,0x08,0x08,0x7F,0x00,0x00,    /*"h"=28h*/
0x00,0x00,0x41,0x7F,0x41,0x00,0x00,0x00,    /*"I"=29h*/
0x00,0x20,0x40,0x41,0x3F,0x01,0x00,0x00,    /*"J"=2Ah*/
0x00,0x7F,0x08,0x14,0x22,0x41,0x00,0x00,    /*"K"=2Bh*/
0x00,0x7F,0x40,0x40,0x40,0x40,0x00,0x00,    /*"L"=2Ch*/
0x00,0x7F,0x02,0x0C,0x02,0x7F,0x00,0x00,    /*"M"=2Dh*/
0x00,0x7F,0x06,0x08,0x30,0x7F,0x00,0x00,    /*"N"=2Eh*/
0x00,0x3E,0x41,0x41,0x41,0x3E,0x00,0x00,    /*"O"=2Fh*/
0x00,0x7F,0x09,0x09,0x09,0x06,0x00,0x00,    /*"P"=30h*/
0x00,0x3E,0x41,0x51,0x21,0x5E,0x00,0x00,    /*"Q"=31h*/
0x00,0x7F,0x09,0x19,0x29,0x46,0x00,0x00,    /*"R"=32h*/
0x00,0x26,0x49,0x49,0x49,0x32,0x00,0x00,    /*"S"=33h*/
0x00,0x01,0x01,0x7F,0x01,0x01,0x00,0x00,    /*"T"=34h*/
0x00,0x3F,0x40,0x40,0x40,0x3F,0x00,0x00,    /*"U"=35h*/
0x00,0x1F,0x20,0x40,0x20,0x1F,0x00,0x00,    /*"V"=36h*/
0x00,0x7F,0x20,0x18,0x20,0x7F,0x00,0x00,    /*"W"=37h*/
0x00,0x63,0x14,0x08,0x14,0x63,0x00,0x00,    /*"X"=38h*/
0x00,0x07,0x08,0x70,0x08,0x07,0x00,0x00,    /*"Y"=39h*/
0x00,0x61,0x51,0x49,0x45,0x43,0x00,0x00,    /*"Z"=3Ah*/
0x00,0x00,0x7F,0x41,0x41,0x00,0x00,0x00,    /*"["=3Bh*/
0x00,0x02,0x04,0x08,0x10,0x20,0x00,0x00,    /*"\"=3Ch*/
0x00,0x00,0x41,0x41,0x7F,0x00,0x00,0x00,    /*"]"=3Dh*/
0x00,0x04,0x02,0x01,0x02,0x04,0x00,0x00,    /*"^"=3Eh*/
0x00,0x40,0x40,0x40,0x40,0x40,0x00,0x00,    /*"_"=3Fh*/
0x00,0x01,0x02,0x04,0x00,0x00,0x00,0x00,    /*"`"=40h*/
0x00,0x20,0x54,0x54,0x54,0x78,0x00,0x00,    /*"a"=41h*/
0x00,0x7F,0x48,0x44,0x44,0x38,0x00,0x00,    /*"b"=42h*/
0x00,0x38,0x44,0x44,0x44,0x28,0x00,0x00,    /*"c"=43h*/
0x00,0x38,0x44,0x44,0x48,0x7F,0x00,0x00,    /*"d"=44h*/
0x00,0x38,0x54,0x54,0x54,0x18,0x00,0x00,    /*"e"=45h*/
0x00,0x00,0x08,0x7E,0x09,0x02,0x00,0x00,    /*"f"=46h*/
0x00,0x0C,0x52,0x52,0x4C,0x3E,0x00,0x00,    /*"g"=47h*/
0x00,0x7F,0x08,0x04,0x04,0x78,0x00,0x00,    /*"h"=48h*/
0x00,0x00,0x44,0x7D,0x40,0x00,0x00,0x00,    /*"i"=49h*/
0x00,0x20,0x40,0x44,0x3D,0x00,0x00,0x00,    /*"j"=4Ah*/
0x00,0x00,0x7F,0x10,0x28,0x44,0x00,0x00,    /*"k"=4Bh*/
0x00,0x00,0x41,0x7F,0x40,0x00,0x00,0x00,    /*"l"=4Ch*/
0x00,0x7C,0x04,0x78,0x04,0x78,0x00,0x00,    /*"m"=4Dh*/
0x00,0x7C,0x08,0x04,0x04,0x78,0x00,0x00,    /*"n"=4Eh*/
0x00,0x38,0x44,0x44,0x44,0x38,0x00,0x00,    /*"o'=4Fh*/
0x00,0x7E,0x0C,0x12,0x12,0x0C,0x00,0x00,    /*"p"=50h*/
0x00,0x0C,0x12,0x12,0x0C,0x7E,0x00,0x00,    /*"q"=51h*/
0x00,0x7C,0x08,0x04,0x04,0x08,0x00,0x00,    /*"r"=52h*/
0x00,0x58,0x54,0x54,0x54,0x64,0x00,0x00,    /*"s"=53h*/
0x00,0x04,0x3F,0x44,0x40,0x20,0x00,0x00,    /*"t"=54h*/
0x00,0x3C,0x40,0x40,0x3C,0x40,0x00,0x00,    /*"u"=55h*/
0x00,0x1C,0x20,0x40,0x20,0x1C,0x00,0x00,    /*"v"=56h*/
0x00,0x3C,0x40,0x30,0x40,0x3C,0x00,0x00,    /*"w"=57h*/
0x00,0x44,0x28,0x10,0x28,0x44,0x00,0x00,    /*"x"=58h*/
0x00,0x1C,0xA0,0xA0,0x90,0x7C,0x00,0x00,    /*"y"=59h*/
0x00,0x44,0x64,0x54,0x4C,0x44,0x00,0x00,    /*"z"=5Ah*/
0x00,0x00,0x08,0x36,0x41,0x00,0x00,0x00,    /*"{"=5Bh*/
0x00,0x00,0x00,0x77,0x00,0x00,0x00,0x00,    /*"|"=5Ch*/
0x00,0x00,0x41,0x36,0x08,0x00,0x00,0x00,    /*"}"=5Dh*/
0x00,0x02,0x01,0x02,0x04,0x02,0x00,0x00,    /*"~"=5Fh*/
0x00,0xFF,0xFF,0xFF,0xFF,0xFF,0x00,0x00     /*" "=0x60*/
 };
#endif