The following procedures as if can only be in the right variables, cannot shift to the left and keep the original number
Is there a big help me take a look at how to change
Thank you very much!!!!!!!!!!!
# include "reg51. H"//this file defines the MCU some special function register
Typedef unsigned int under-16;//to statement defines the data type
Typedef unsigned char u8;
# define GPIO_DIG P0
# define GPIO_KEY P1
U8 KeyValue;//used to store the keys of the read
U8 keyflag;//used to reply whether there is a button to press
U8 code smgduan [16]={xa4 xc0 0, 0 xf9, 0, 0 xb0, 0 x99, 0 x92,
0 x82, 0 xf8, 0 x80, 0 x90, 0 x88, 0 x83, 0 xc6, xa1 0, 0 x86, 0 x8e};//show the value of 0 ~ F
Under-16 wei [8]=,1,2,3,4,5,6,7 {0};//used to store every digital tube digital array
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* letter of several: delay
* function function: delay function, I=1, delay about 10 us
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
Void delay (under-16 I)
{
while(i--);
}
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* letter of several: KeyDown
* functions: detection with keys pressed and reads the keys
No
* entered:No
* output:* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
Void KeyDown (void)
{
Char a=0;
GPIO_KEY=0 x0f;
If (GPIO_KEY!=0 x0f)/whether/read button press
{
Keyflag=1;//a button press, value is 1;
delay(1000);//delay 10 ms away shaking,
If (GPIO_KEY!=0 x0f)//again to test whether the keyboard press
{
//test column
GPIO_KEY=0 xf0;
//Delay10ms ();
The switch (GPIO_KEY)
{
Case (0 xe0-0xfc) : KeyValue=https://bbs.csdn.net/topics/0; break;
Case (0 xd0) : KeyValue=https://bbs.csdn.net/topics/1; break;
Case (0 xb0) : KeyValue=https://bbs.csdn.net/topics/2; break;
Case (0 x70) : KeyValue=https://bbs.csdn.net/topics/3; break;
//the default: KeyValue=https://bbs.csdn.net/topics/17;//detection error reply 17 mean off all of the digital tube,
}
//test
GPIO_KEY=0 x0f;
/* Delay10ms (); */
The switch (GPIO_KEY)
{
Case (0 x0e) : KeyValue=https://bbs.csdn.net/topics/KeyValue; break;
Case (0 x0d) : KeyValue=https://bbs.csdn.net/topics/KeyValue+4; break;
Case (0 x0b) : KeyValue=https://bbs.csdn.net/topics/KeyValue+8; break;
Case (0 x07) : KeyValue=https://bbs.csdn.net/topics/KeyValue+12; break;
While ((a<500) & amp; & (GPIO_KEY!=0 xf0))//inspection buttons let go
{
delay(1000);
a++;
}
}
}
}
}
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* letter of several: display
* function function: scan showed digital tube
No
* entered:No
* output:* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
Void the display ()
{unsigned char (I);
Unsigned char j;
for(i=0; I<8; I++)
{
P0=smgduan [wei [I]].
The P2=~ (1 & lt;
{}
The P2=0 XFF;
for(j=0; J<10; J++)
{}}
}
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* letter of several: the main
* function function: the main function
No
* entered:No
* output:* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
Void main ()
{
u8 i;
While (1)
{
The display ();//digital tube display
KeyDown ();//determine whether buttons to press
If (keyflag==1)//if the button pressed, each number in the array to move forward a
{
For (I=7. I> 0; I -)
{wei [I]=wei [I - 1); }
Wei [0]=KeyValue;
Keyflag=0;
}
}
}