code.c

利用89S51将6*6键盘转换成PS/2协议

//按键扫描码定义，当前只包括了从a到z一共26个字母的扫描码，根据需要可以增加，比如增加阿拉伯数字0-9的扫描码
#define _A_M  0X1c                     //以下后缀是M的对应扫描码中的通码，后缀为B的对应断码
#define _A_B  0Xf0,0x1c
#define _B_M  0X32
#define _B_B  0Xf0,0X32
#define _C_M  0X21
#define _C_B  0Xf0,0x21
#define _D_M  0X23
#define _D_B  0XF0,0X23
#define _E_M  0X24
#define _E_B  0XF0,0X24

#define _F_M  0X2B
#define _F_B  0XF0,0X2B
#define _G_M  0X34
#define _G_B  0XF0,0X34

#define _H_M  0X33
#define _H_B  0XF0,0X33
#define _I_M  0X43
#define _I_B  0XF0,0X43
#define _J_M  0X3B
#define _J_B  0XF0,0X3B

#define _K_M  0X42
#define _K_B  0XF0,0X42
#define _L_M  0X4B
#define _L_B  0XF0,0X4B
#define _M_M  0X3A
#define _M_B  0XF0,0X3A
#define _N_M  0X31
#define _N_B  0XF0,0X31
#define _O_M  0X44
#define _O_B  0XF0,0X44
#define _P_M  0X4D
#define _P_B  0XF0,0X4D
#define _Q_M  0X15
#define _Q_B  0XF0,0X15
#define _R_M  0X2D
#define _R_B  0XF0,0X2D
#define _S_M  0X1B
#define _S_B  0XF0,0X1B
#define _T_M  0X2C
#define _T_B  0XF0,0X2C
#define _U_M  0X3C                 
#define _U_B  0XF0,0X3C
#define _V_M  0X2A
#define _V_B  0XF0,0X2A
#define _W_M  0X1D
#define _W_B  0XF0,0X1D

#define _X_M  0X22
#define _X_B  0XF0,0X22
#define _Y_M  0X35
#define _Y_B  0XF0,0X35
#define _Z_M  0X1A
#define _Z_B  0XF0,0X1A
#define _NULL_M 0
#define _NULL_B 0
//扫描码存储格式，在单片机程序存储区
unsigned char code
_A_[]={_A_M,0,_A_B,0},          //各数组扫描码通码和断码之间用0隔开，在发送扫描码时如果当前数组元素为0则表示发送完成（通码或者断码）
_B_[]={_B_M,0,_B_B,0},
_C_[]={_C_M,0,_C_B,0},
_D_[]={_D_M,0,_D_B,0},
_E_[]={_E_M,0,_E_B,0},
_F_[]={_F_M,0,_F_B,0},
_G_[]={_G_M,0,_G_B,0},
_H_[]={_H_M,0,_H_B,0},
_I_[]={_I_M,0,_I_B,0},
_J_[]={_J_M,0,_J_B,0},
_K_[]={_K_M,0,_K_B,0},
_L_[]={_L_M,0,_L_B,0},
_M_[]={_M_M,0,_M_B,0},
_N_[]={_N_M,0,_N_B,0},
_O_[]={_O_M,0,_O_B,0},
_P_[]={_P_M,0,_P_B,0},
_Q_[]={_Q_M,0,_Q_B,0},
_R_[]={_R_M,0,_R_B,0},
_S_[]={_S_M,0,_S_B,0},
_T_[]={_T_M,0,_T_B,0},
_U_[]={_U_M,0,_U_B,0},
_V_[]={_V_M,0,_V_B,0},
_W_[]={_W_M,0,_W_B,0},
_X_[]={_X_M,0,_X_B,0},
_Y_[]={_Y_M,0,_Y_B,0},
_Z_[]={_Z_M,0,_Z_B,0},
_NULL_[]={_NULL_M,0,_NULL_B,0};

/*按键扫描码存储区地址数组，通过修改排列顺序可改变按键定义。比如当前第一行第一列对应字母a，第一行第二列对应
字母b，第一行第三列对应字母c，如果将kk[]改为kk[]={_C_,_B_,_A_,..............},则第一行第一列将对应字母c，以此类推
在对键盘进行扫描时通过扫描的行和列可以计算出当前扫描到的按键的位置，每一位置对应按键扫描码存储区地址数组的一个数组，
*/
typedef unsigned char code *tt;
tt code kk[]={                 
_A_,
_B_,
_C_,
_D_,
_E_,
_F_,
_G_,
_H_,
_I_,
_J_,
_K_,
_L_,
_M_,
_N_,
_O_,
_P_,
_Q_,
_R_,
_S_,
_T_,
_U_,
_V_,
_W_,
_X_,
_Y_,
_Z_,
_NULL_};