#include
typedef unsigned char uchar;
typedef unsigned int uint;
typedef unsigned long ulong;
sbit ADDR0 = P1^0;
sbit ADDR1 = P1^1;
sbit ADDR2 = P1^2;
sbit ADDR3 = P1^3;
sbit ENLED = P1^4;
sbit KEY_IN_0 = P2^4;
sbit KEY_IN_1 = P2^5;
sbit KEY_IN_2 = P2^6;
sbit KEY_IN_3 = P2^7;
sbit KEY_OUT_0 = P2^3;
sbit KEY_OUT_1 = P2^2;
sbit KEY_OUT_2 = P2^1;
sbit KEY_OUT_3 = P2^0;
uchar code LEDChar[] = { //数码管显示字符转换表
0xC0, 0xF9, 0xA4, 0xB0, 0x99, 0x92, 0x82, 0xF8,
0x80, 0x90, 0x88, 0x83, 0xC6, 0xA1, 0x86, 0x8E
};
uchar LEDBuff[6] = { //数码管显示缓冲区
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF
};
uchar code keyCodeMap[4][4] = { //矩阵按键编号到标准键盘键码的映射表
{0x31, 0x32, 0x33, 0x26}, //数字键1、数字键2、数字键3、向上键
{0x34, 0x35, 0x36, 0x25}, //数字键4、数字键5、数字键6、向左键
{0x37, 0x38, 0x39, 0x28}, //数字键7、数字键8、数字键9、向下键
{0x30, 0x1B, 0x0D, 0x27} //数字键0、ESC键、 回车键、 向右键
};
uchar keyState[4][4] = { //全部矩阵按键的当前状态
{1, 1, 1, 1}, {1, 1, 1, 1}, {1, 1, 1, 1}, {1, 1, 1, 1}
};
uchar T0RH = 0;
uchar T0RL = 0;
void ShowNumber(ulong num)
{
char i;
uchar buf[6];
for (i=0; i<6; i++)
{
buf[i] = num % 10;
num /= 10;
}
for (i=5; i>=0; i--)
{
if (buf[i] == 0)
LEDBuff[i] = 0xFF;
else
break;
}
for (; i>=0; i--)
LEDBuff[i] = LEDChar[buf[i]];
}
void KeyAction(uchar keyCode)
{
static ulong result = 0;
static ulong number = 0;
if (keyCode >= 0x30 && keyCode <= 0x39)
{
number = number * 10 + keyCode - 0x30;
ShowNumber(number);
}
else if (keyCode == 0x26 || keyCode == 0x0D)
{
result += number;
number = 0;
ShowNumber(result);
}
else if (keyCode == 0x1B)
{
number = 0;
result = 0;
ShowNumber(number);
}
}
void KeyDriver()
{
uchar i, j;
static uchar backup[4][4] = {
{1, 1, 1, 1}, {1, 1, 1, 1}, {1, 1, 1, 1}, {1, 1, 1, 1}
};
for (i=0; i<4; i++)
for (j=0; j<4; j++)
if (keyState[i][j] != backup[i][j])
{
if (keyState[i][j] == 0)
KeyAction(keyCodeMap[i][j]);
backup[i][j] = keyState[i][j];
}
}
void KeyScan()
{
static uchar i = 0;
static uchar keyBuf[4][4] = {
{0xFF, 0xFF, 0xFF, 0xFF}, {0xFF, 0xFF, 0xFF, 0xFF},
{0xFF, 0xFF, 0xFF, 0xFF}, {0xFF, 0xFF, 0xFF, 0xFF}
};
uchar j;
keyBuf[i][0] = (keyBuf[i][0] <
keyBuf[i][1] = (keyBuf[i][1] <
keyBuf[i][2] = (keyBuf[i][2] <
keyBuf[i][3] = (keyBuf[i][3] <
for (j=0; j<4; j++)
{
if (keyBuf[i][j] == 0x00)
keyState[i][j] = 0;
else if (keyBuf[i][j] == 0xFF)
keyState[i][j] = 1;
}
switch (i)
{
case 0: KEY_OUT_0 = 1; KEY_OUT_1 = 0; break;
case 1: KEY_OUT_1 = 1; KEY_OUT_2 = 0; break;
case 2: KEY_OUT_2 = 1; KEY_OUT_3 = 0; break;
case 3: KEY_OUT_3 = 1; KEY_OUT_0 = 0; break;
default : break;
}
i = ++i & 0x03;
}
void LEDScan()
{
static uchar i = 0;
P0 = 0xFF;
P1 = (P1 & 0xF8) | i;
P0 = LEDBuff[i];
if (i
i++;
else
i = 0;
}
void SetTimer0(uint ms)
{
ulong tmp;
tmp = 11059326 / 12;
tmp = tmp * ms / 1000;
tmp = 65536 - tmp;
tmp += 28;
T0RL = tmp;
T0RH = tmp>>8;
}
void InterruptTimer0() interrupt 1
{
TH0 = T0RH;
TL0 = T0RL;
LEDScan();
KeyScan();
}
void main()
{
EA = 1;
ENLED = 0;
ADDR3 = 1;
TMOD = 0x01;
SetTimer0(1);
TH0 = T0RH;
TL0 = T0RL;
ET0 = 1;
TR0 = 1;
LEDBuff[0] = LEDChar[0];
while (1)
{
KeyDriver();
}
}
我想加一个效果,在按加号的时候同时显示数字和加号,我使用了第二个定时器定时,可是实验结果是中断服务函数执行得太慢了,扫描很慢,看不到连续的画面,效果不好,而且影响下一个按键的判断。。
[cpp] view plain copy
#include
typedef unsigned char uchar;
typedef unsigned int uint;
typedef unsigned long ulong;
sbit ADDR0 = P1^0;
sbit ADDR1 = P1^1;
sbit ADDR2 = P1^2;
sbit ADDR3 = P1^3;
sbit ENLED = P1^4;
sbit KEY_IN_0 = P2^4;
sbit KEY_IN_1 = P2^5;
sbit KEY_IN_2 = P2^6;
sbit KEY_IN_3 = P2^7;
sbit KEY_OUT_0 = P2^3;
sbit KEY_OUT_1 = P2^2;
sbit KEY_OUT_2 = P2^1;
sbit KEY_OUT_3 = P2^0;
uchar code LedChar[] = { //数码管显示字符转换表
0xC0, 0xF9, 0xA4, 0xB0, 0x99, 0x92, 0x82, 0xF8,
0x80, 0x90, 0x88, 0x83, 0xC6, 0xA1, 0x86, 0x8E
};
uchar LedBuff[6] = { //数码管显示缓冲区
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF
};
uchar code KeyCodeMap[4][4] = { //矩阵按键编号到标准键盘键码的映射表
{ 0x31, 0x32, 0x33, 0x26 }, //数字键1、数字键2、数字键3、向上键
{ 0x34, 0x35, 0x36, 0x25 }, //数字键4、数字键5、数字键6、向左键
{ 0x37, 0x38, 0x39, 0x28 }, //数字键7、数字键8、数字键9、向下键
{ 0x30, 0x1B, 0x0D, 0x27 } //数字键0、ESC键、 回车键、 向右键
};
uchar keyState[4][4] = { //全部矩阵按键的当前状态
{1, 1, 1, 1}, {1, 1, 1, 1}, {1, 1, 1, 1}, {1, 1, 1, 1}
};
uchar code image[] = {
0xFF,0xE7,0xE7,0x81,0x81,0xE7,0xE7,0xFF
};
uchar T0RH = 0;
uchar T0RL = 0;
void showNumber(ulong num){
char i;
uchar buf[6];
for(i=0; i<6; i++){
buf[i] = num % 10;
num /= 10;
}
for(i=5; i>=0; i--){
if(buf[i] == 0) LedBuff[i] = 0xFF;
else break;
}
for(; i>=0; i--){
LedBuff[i] = LedChar[buf[i]];
}
}
void showPicture(){
TR0 = 0;
ET0 = 0;
ADDR3 = 0;
TMOD &= 0x0F;
TMOD |= 0x10;
TH1 = 0xFF;
TL1 = 0xFE;
ET1 = 1;
TR1 = 1;
}
void closePicture(){
TR1 = 0;
ET1 = 0;
ADDR3 = 1;
ET0 = 1;
TR0 = 1;
}
void keyAction(uchar keyCode){
static ulong result = 0;
static ulong number = 0;
static bit flag = 0;
if(keyCode >= 0x30 && keyCode <= 0x39){
if(flag == 1){
closePicture();
flag = 0;
}
number = number * 10 + keyCode - 0x30;
showNumber(number);
}
else if(keyCode == 0x26 || keyCode == 0x0D){
result += number;
number = 0;
showNumber(result);
showPicture();
flag = 1;
}
else if(keyCode == 0x1B){
if(flag == 1){
closePicture();
flag = 0;
}
number = 0;
result = 0;
showNumber(number);
}
}
void keyDriver(){
uchar i, j;
static uchar backup[4][4] = {
{1, 1, 1, 1}, {1, 1, 1, 1}, {1, 1, 1, 1}, {1, 1, 1, 1}
};
for(i=0; i<4; i++){
for(j=0; j<4; j++){
if(keyState[i][j] != backup[i][j]){
if(keyState[i][j] == 0){
keyAction(KeyCodeMap[i][j]);
}
backup[i][j] = keyState[i][j];
}
}
}
}
void keyScan(){
static uchar i = 0;
static uchar keyBuf[4][4] = {
{0xFF, 0xFF, 0xFF, 0xFF}, {0xFF, 0xFF, 0xFF, 0xFF},
{0xFF, 0xFF, 0xFF, 0xFF}, {0xFF, 0xFF, 0xFF, 0xFF}
};
uchar j;
keyBuf[i][0] = (keyBuf[i][0] <
keyBuf[i][1] = (keyBuf[i][1] <
keyBuf[i][2] = (keyBuf[i][2] <
keyBuf[i][3] = (keyBuf[i][3] <
for(j=0; j<4; j++) {
if(keyBuf[i][j] == 0x00){
keyState[i][j] = 0;
}
else if(keyBuf[i][j] == 0xFF){
keyState[i][j] = 1;
}
}
switch(i){
case 0: KEY_OUT_0 = 1; KEY_OUT_1 = 0; break;
case 1: KEY_OUT_1 = 1; KEY_OUT_2 = 0; break;
case 2: KEY_OUT_2 = 1; KEY_OUT_3 = 0; break;
case 3: KEY_OUT_3 = 1; KEY_OUT_0 = 0; break;
default: break;
}
i = ++i & 0x03;
}
void LEDScan(){
static uchar i = 0;
P0 = 0xFF;
P1 = (P1 & 0xF8) | i;
P0 = LedBuff[i];
if(i
else i = 0;
}
void setTimer0(uint ms){
ulong tmp;
tmp = 11059326 / 12;
tmp = tmp * ms / 1000;
tmp = 65536 - tmp;
tmp += 28;
T0RL = tmp;
T0RH = tmp>>8;
}
void interruptTimer0() interrupt 1{
TH0 = T0RH;
TL0 = T0RL;
LEDScan();
keyScan();
}
void interruptTimer1() interrupt 3{
static uchar i = 0, j = 0;
static bit flag = 1;
if(flag){
ADDR3 = 0;
P0 = 0xFF;
P1 = (P1 & 0xF8) | i;
P0 = image[i];
if(i
else{
i = 0;
flag = 0;
}
}
else{
ADDR3 = 1;
P0 = 0xFF;
P1 = (P1 & 0xF8) | j;
P0 = LedBuff[j];
if(j
else{
j = 0;
flag = 1;
}
}
keyScan();
}
void main(){
EA = 1;
ENLED = 0;
ADDR3 = 1;
TMOD = 0x01;
setTimer0(1);
TH0 = T0RH;
TL0 = T0RL;
ET0 = 1;
TR0 = 1;
LedBuff[0] = LedChar[0];
while(1){
keyDriver();
}
}
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