英文输入（国外英文资料）.docVIP

英文输入（国外英文资料） # include reg52. H # define uint unsigned int # define uchar unsigned char / * LCD port definition * / Sbit RS = P3 ^ 7; Sbit RW = P3 ^ 6; Sbit E = P3 ^ 5; SFR LCDData = 0 x80; SFR keyport = 0 xa0; Bit dat. Uchar ywei = 0 x80, bian = 3; * liquid-crystal-drive function * * * * * * * * Void Delay (uint I) { While (I -); } Void Write_Instruction uchar (CMD) { Delay (5000); E = 0; RW = 0; RS = 0; E = 1; LCDData = CMD; Delay (50); E = 0; } Void InitLCD (void) { X38 Write_Instruction (0); Delay (200); X0c Write_Instruction (0); Delay (200); Write_Instruction x06 (0); Delay (200); } Void Write_Data (uchar dat) { Delay (5000); E = 0; RW = 0; RS = 1; E = 1; LCDData = dat; Delay (50); E = 0; } Void Write_String (uchar x, uchar * p) { Write_Instruction (x); While (* p! = 0 x00) { Write_Data (* p). P++; If (x + + = 0x8f) { Xc0 Write_Instruction (0); } } } * * * * * * * * * * * * * determinant keyboard drivers * * * * * * * * Bit ReadKey (void) { Bit dat. Keyport = 0 xf0; / / keyboard top 4 line is 1, low four line is 0 If (keyport = = 0 xf0) { Dat = 0; / / no buttons are pressed } The else { Dat = 1; / / there is a button pressing now } Return (dat); } Uchar IdentifyKey (void) { Uchar I = 1, j = 0xfe, m; While (j! = 0 x7f) { Keyport = j; M = keyport 0 xf0; The switch (m) { Case 0 xe0-0xfc: { / / I = I + 0; J = 0 x7f; Break; } Case 0 xd0: { I = I + 4; J = 0 x7f; Break; } Case 0 xb0: { I = I + 8; J = 0 x7f; Break; } Case 0 x70: { I = I + 12; J = 0 x7f; Break; } Default: { I = I + 1; J = (j 1) + 1; Break; } } } Return (I); } Uchar ucGetNum (unsigned char x) { The switch (x) { Case 1: Write_String ( a ); Break; Case 2: Write_String ( b ); Break; Case 3: Write_String ( c ); Break; Case 4: Write_String ( d ); Break; Case 5: Write_String ( e ); Break; Case 6: Write_String ( f ); Break; Case 7: Write_String ( g ); Break; Case 8: Write_String ( h ); Break; Case 9: Write_String ( I ); Break; Case 10: Write_String ( j ); Break; Case 11: Write_String ( k ); Break; Case 12: