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#define MAIN_Fosc 22118400L //定義主時鐘
#include "STC15Fxxxx.H"
#define Timer0_Reload (65536UL -(MAIN_Fosc / 1000)) //Timer 0 中斷頻率, 1000次/秒
#define DIS_DOT 0x20
#define DIS_BLACK 0x10
#define DIS_ 0x11
u8 code t_display[]={ //標準字庫
// 0 1 2 3 4 5 6 7 8 9 A B C D E F
0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F,0x77,0x7C,0x39,0x5E,0x79,0x71,
//black - H J K L N o P U t G Q r M y
0x00,0x40,0x76,0x1E,0x70,0x38,0x37,0x5C,0x73,0x3E,0x78,0x3d,0x67,0x50,0x37,0x6e,
0xBF,0x86,0xDB,0xCF,0xE6,0xED,0xFD,0x87,0xFF,0xEF,0x46}; //0. 1. 2. 3. 4. 5. 6. 7. 8. 9. -1
u8 code T_COM[]={0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80}; //位碼
sbit P_HC595_SER = P4^0; //pin 14 SER data input
sbit P_HC595_RCLK = P5^4; //pin 12 RCLk store (latch) clock
sbit P_HC595_SRCLK = P4^3; //pin 11 SRCLK Shift data clock
u8 LED8[8]; //顯示緩沖
u8 display_index; //顯示位索引
bit B_1ms; //1ms標志
u8 KeyCode; //給用戶使用的鍵碼, 1~16有效
u8 cnt10ms;
u8 IO_KeyState, IO_KeyState1, IO_KeyHoldCnt; //行列鍵盤變量
u8 cnt50ms;
u8 hour,minute,second; //RTC變量
u16 msecond;
void IO_KeyScan(void); //50ms call
/********************** 顯示時鐘函數 ************************/
void DisplayRTC(void)
{
if(hour >= 10) LED8[0] = hour / 10;
else LED8[0] = DIS_BLACK;
LED8[1] = hour % 10;
LED8[2] = minute / 10;
LED8[3] = minute % 10;
if(msecond >= 500) LED8[1] |= DIS_DOT; //小時后的小數點做秒閃
}
/********************** RTC演示函數 ************************/
void RTC(void)
{
if(++second >= 60)
{
second = 0;
if(++minute >= 60)
{
minute = 0;
if(++hour >= 24) hour = 0;
}
}
}
/**********************************************/
void main(void)
{
u8 i;
P0M1 = 0; P0M0 = 0; //設置為準雙向口
P1M1 = 0; P1M0 = 0; //設置為準雙向口
P2M1 = 0; P2M0 = 0; //設置為準雙向口
P3M1 = 0; P3M0 = 0; //設置為準雙向口
P4M1 = 0; P4M0 = 0; //設置為準雙向口
P5M1 = 0; P5M0 = 0; //設置為準雙向口
P6M1 = 0; P6M0 = 0; //設置為準雙向口
P7M1 = 0; P7M0 = 0; //設置為準雙向口
display_index = 0;
AUXR = 0x80; //Timer0 set as 1T, 16 bits timer auto-reload,
TH0 = (u8)(Timer0_Reload / 256);
TL0 = (u8)(Timer0_Reload % 256);
ET0 = 1; //Timer0 interrupt enable
TR0 = 1; //Tiner0 run
EA = 1; //打開總中斷
for(i=0; i<8; i++) LED8[i] = 0x10; //上電消隱
hour = 12; //初始化時間值
minute = 0;
second = 0;
DisplayRTC();
KeyCode = 0; //給用戶使用的鍵碼, 1~16有效
cnt10ms = 0;
IO_KeyState = 0;
IO_KeyState1 = 0;
IO_KeyHoldCnt = 0;
cnt50ms = 0;
while(1)
{
if(B_1ms) //1ms到
{
B_1ms = 0;
if(++msecond >= 1000) //1秒到
{
msecond = 0;
RTC();
DisplayRTC();
}
if(msecond == 500) DisplayRTC(); //小時后的小數點做秒閃
if(++cnt50ms >= 50) //50ms掃描一次行列鍵盤
{
cnt50ms = 0;
IO_KeyScan();
}
if(KeyCode > 0) //有鍵按下
{
LED8[6] = KeyCode / 10; //顯示鍵碼
LED8[7] = KeyCode % 10; //顯示鍵碼
if(KeyCode == 17) //hour +1
{
if(++hour >= 24) hour = 0;
DisplayRTC();
}
if(KeyCode == 18) //hour -1
{
if(--hour >= 24) hour = 23;
DisplayRTC();
}
if(KeyCode == 19) //minute +1
{
second = 0;
if(++minute >= 60) minute = 0;
DisplayRTC();
}
if(KeyCode == 20) //minute -1
{
second = 0;
if(--minute >= 60) minute = 59;
DisplayRTC();
}
KeyCode = 0;
}
}
}
}
/**********************************************/
/*****************************************************
行列鍵掃描程序
使用XY查找4x4鍵的方法，只能單鍵，速度快
Y P04 P05 P06 P07
| | | |
X | | | |
P00 ---- K00 ---- K01 ---- K02 ---- K03 ----
| | | |
P01 ---- K04 ---- K05 ---- K06 ---- K07 ----
| | | |
P02 ---- K08 ---- K09 ---- K10 ---- K11 ----
| | | |
P03 ---- K12 ---- K13 ---- K14 ---- K15 ----
| | | |
******************************************************/
u8 code T_KeyTable[16] = {0,1,2,0,3,0,0,0,4,0,0,0,0,0,0,0};
void IO_KeyDelay(void)
{
u8 i;
i = 60;
while(--i) ;
}
void IO_KeyScan(void) //50ms call
{
u8 j;
j = IO_KeyState1; //保存上一次狀態
P0 = 0xf0; //X低，讀Y
IO_KeyDelay();
IO_KeyState1 = P0 & 0xf0;
P0 = 0x0f; //Y低，讀X
IO_KeyDelay();
IO_KeyState1 |= (P0 & 0x0f);
IO_KeyState1 ^= 0xff; //取反
if(j == IO_KeyState1) //連續兩次讀相等
{
j = IO_KeyState;
IO_KeyState = IO_KeyState1;
if(IO_KeyState != 0) //有鍵按下
{
F0 = 0;
if(j == 0) F0 = 1; //第一次按下
else if(j == IO_KeyState)
{
if(++IO_KeyHoldCnt >= 20) //1秒后重鍵
{
IO_KeyHoldCnt = 18;
F0 = 1;
}
}
if(F0)
{
j = T_KeyTable[IO_KeyState >> 4];
if((j != 0) && (T_KeyTable[IO_KeyState& 0x0f] != 0))
KeyCode = (j - 1) * 4 + T_KeyTable[IO_KeyState & 0x0f] + 16; //計算鍵碼，17~32
}
}
else IO_KeyHoldCnt = 0;
}
P0 = 0xff;
}
/**************** 向HC595發送一個字節函數 ******************/
void Send_595(u8 dat)
{
u8 i;
for(i=0; i<8; i++)
{
dat <<= 1;
P_HC595_SER = CY;
P_HC595_SRCLK = 1;
P_HC595_SRCLK = 0;
}
}
/********************** 顯示掃描函數 ************************/
void DisplayScan(void)
{
Send_595(~T_COM[display_index]); //輸出位碼
Send_595(t_display[LED8[display_index]]); //輸出段碼
P_HC595_RCLK = 1;
P_HC595_RCLK = 0; //鎖存輸出數據
if(++display_index >= 8) display_index = 0; //8位結束回0
}
/********************** Timer0 1ms中斷函數 ************************/
void timer0 (void) interrupt TIMER0_VECTOR
{
DisplayScan(); //1ms掃描顯示一位
B_1ms = 1; //1ms標志
}

復制代碼

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