C语言代码：key功能实现

/*--------------------------------------------------------------------------*/
/**@file key.C
   @brief 按键处理
   @details 按键处理，包括按键检测和按键音处理
   @author LZZ
   @date   2010-08-17
   @note   none
*/
/*----------------------------------------------------------------------------*/
#include "key.h"
#include "tff.h"
#include "MP3_API.h"
#include "sd.h"
#include "I2C_OTP.h"
#include "include.h"
#include "lcd.h"
#include "deal_msg.h"

#include "otp_var.h"


extern bool  set_dac_sample(u8 sample);


#ifdef USB_TIMER1_IR
#define TIMER1_PRESCAL    128  //32
#define userCode_FD02 0XFD02    //20KEY
#define userCode_FE01 0XFE01    //21KEY
#define userCode_FF00 0xFF00    //21KEY
#define userCode_BF00 0xBF00    //18KEY

#pragma constseg=IR_CONST_TABLE
const u8 irUserTable_FD02[32] = //20KEY
{
   //code FD02
   // 0           1              2            3       4            5               6             7       8                9                A                B       C        D        E        F */
/*0*/ T_KEY_PLAY, T_KEY_CH_DOWN, T_KEY_CH_UP, NO_KEY, T_KEY_EQ_UP, T_KEY_VOL_DOWN, T_KEY_VOL_UP, NO_KEY, T_KEY_0,         T_KEY_PREV_FILE, T_KEY_NEXT_FILE, NO_KEY, T_KEY_1, T_KEY_2, T_KEY_3, NO_KEY,
/*1*/ T_KEY_4,    T_KEY_5,       T_KEY_6,     NO_KEY, T_KEY_7,     T_KEY_8,        T_KEY_9,      NO_KEY, T_KEY_PICK_SONG, NO_KEY,          T_KEY_MODE,      NO_KEY, NO_KEY,  NO_KEY,  NO_KEY,  NO_KEY,
};

const u8 irUserTable_FE01[32] = //21KEY
{
   //code FE01
   // 0                1            2               3             4        5                6                7        8        9           A              B        C        D        E            F */
/*0*/ T_KEY_PICK_SONG, T_KEY_EQ_UP, T_KEY_VOL_DOWN, T_KEY_VOL_UP, T_KEY_0, T_KEY_PREV_FILE, T_KEY_NEXT_FILE, T_KEY_1, T_KEY_2, T_KEY_3,    T_KEY_4,       NO_KEY,  T_KEY_7, T_KEY_8, T_KEY_9,     T_KEY_POWER,
/*1*/ NO_KEY,          NO_KEY,      T_KEY_PLAY,     NO_KEY,       NO_KEY,  NO_KEY,          NO_KEY,          NO_KEY,  NO_KEY,  T_KEY_MODE, T_KEY_CH_DOWN, T_KEY_5, NO_KEY,  NO_KEY,  T_KEY_CH_UP, T_KEY_6,
};

const u8 irUserTable_FF00[96] = //21KEY
{
   //code FF00
   // 0                1       2        3            4           5                6               7                8        9             A         B       C        D        E        F */
/*0*/ NO_KEY,          NO_KEY, NO_KEY,  NO_KEY,      NO_KEY,     NO_KEY,          NO_KEY,         T_KEY_PREV_FILE, T_KEY_4, T_KEY_PLAY,   NO_KEY,   NO_KEY, T_KEY_1, T_KEY_0, NO_KEY,  NO_KEY,
/*1*/ NO_KEY,          NO_KEY, NO_KEY,  NO_KEY,      NO_KEY,     T_KEY_NEXT_FILE, T_KEY_VOL_DOWN, NO_KEY,          T_KEY_2, T_KEY_VOL_UP, NO_KEY,   NO_KEY, T_KEY_5, NO_KEY,  NO_KEY,  NO_KEY,
/*2*/ NO_KEY,          NO_KEY, NO_KEY,  NO_KEY,      NO_KEY,     NO_KEY,          NO_KEY,         NO_KEY,          NO_KEY,  NO_KEY,       NO_KEY,   NO_KEY, NO_KEY,  NO_KEY,  NO_KEY,  NO_KEY,
/*3*/ NO_KEY,          NO_KEY, NO_KEY,  NO_KEY,      NO_KEY,     NO_KEY,          NO_KEY,         NO_KEY,          NO_KEY,  NO_KEY,       NO_KEY,   NO_KEY, NO_KEY,  NO_KEY,  NO_KEY,  NO_KEY,
/*4*/ T_KEY_PLAY_MODE, NO_KEY, T_KEY_7, T_KEY_EQ_UP, T_KEY_MODE, T_KEY_POWER,     T_KEY_STOP,     T_KEY_MUTE,      NO_KEY,  NO_KEY,       T_KEY_9,  NO_KEY, NO_KEY,  NO_KEY,  NO_KEY,  NO_KEY,
/*5*/ NO_KEY,          NO_KEY, T_KEY_8, NO_KEY,      NO_KEY,     NO_KEY,          NO_KEY,         NO_KEY,          NO_KEY,  NO_KEY,       T_KEY_6,  NO_KEY, NO_KEY,  NO_KEY,  T_KEY_3, NO_KEY,
};

const u8 irUserTable_BF00[32] = //18KEY