读取7段LED上显示的电压时出现错误。 PCB由另一个人设计。他们没有将7段LED引脚分配给MCU的同一端口。
在此，我认为MCU代码正确。但是LED显示错误的电压值。我首先有一个问题。我们可以将7段LED引脚连接到MCU（微控制器）的2个端口吗？例如段a〜d连接到MCU的引脚P1.0〜P1.3，段e〜h连接到引脚P2.0〜P2.3。或仅连接到同一端口，例如LED段a〜h连接到MCU引脚P1.0〜P1.7吗？
这是引脚寻址和LED控制的代码：
// PORT 1
//--------------------------------------
sbit UP_BUTTON = P1^0;
sbit DOWN_BUTTON = P1^1;
sbit LEFT_BUTTON = P1^2;
sbit RIGHT_BUTTON = P1^3;
sbit ENTER_BUTTON = P1^4;
sbit _7SEG_COM5 = P1^5;
sbit _7SEG_COM4 = P1^6;
sbit _7SEG_COM3 = P1^7;
//--------------------------------------
// PORT 2
//--------------------------------------
sbit _7SEG_F = P2^0;
sbit _7SEG_G = P2^1;
sbit _7SEG_H = P2^2;
sbit _7SEG_COM0 = P2^3;
sbit _7SEG_COM1 = P2^4;
sbit _7SEG_COM2 = P2^5;
sbit B_RST = P2^6; //DATA B RST
sbit B_RSTSEL = P2^7; //DATA B RSTSEL
//--------------------------------------
// PORT 3
//--------------------------------------
sbit THREE_ZERO = P3^0;
sbit THREE_ONE = P3^1;
sbit READY = P3^2;
sbit _7SEG_A = P3^3;
sbit _7SEG_B = P3^4;
sbit _7SEG_C = P3^5;
sbit _7SEG_D = P3^6;
sbit _7SEG_E = P3^7;
sbit Sinitial_f = Flag0^1;
unsigned char idata SEG[6] _at_ 0x82;
// 7 segment display in addition,3rd number(SEG2) is dot always
//=======================================================================================
void SEGMENT_DISPLAY(void)
{
unsigned char SFRPAGE_BUF,seg_num,seg_value;
int cnt, i, num, temp;
SFRPAGE_BUF = SFRPAGE;
SFRPAGE = CONFIG_PAGE;
if(!Sinitial_f)
{
SEG[0] = 0x0A;
SEG[1] = 0x0A;
SEG[2] = 0x0A;
SEG[3] = 0x0A;
SEG[4] = 0x0A;
SEG[5] = 0x0A;
Sinitial_f = 1;
}
for(seg_num=0x00;seg_num<=0x04;seg_num++)
{
seg_value = SEG[seg_num];
switch(seg_value)
{
case 0x00: _7SEG_A = 1;//0
_7SEG_B = 1;
_7SEG_C = 1;
_7SEG_D = 1;
_7SEG_E = 1;
_7SEG_F = 1;
_7SEG_G = 0;
_7SEG_H = 0;
break;
case 0x01: _7SEG_A = 0;//1
_7SEG_B = 1;
_7SEG_C = 1;
_7SEG_D = 0;
_7SEG_E = 0;
_7SEG_F = 0;
_7SEG_G = 0;
_7SEG_H = 0;
break;
case 0x02: _7SEG_A = 1;//2
_7SEG_B = 1;
_7SEG_C = 0;
_7SEG_D = 1;
_7SEG_E = 1;
_7SEG_F = 0;
_7SEG_G = 1;
_7SEG_H = 0;
break;
case 0x03: _7SEG_A = 1;//3
_7SEG_B = 1;
_7SEG_C = 1;
_7SEG_D = 1;
_7SEG_E = 0;
_7SEG_F = 0;
_7SEG_G = 1;
_7SEG_H = 0;
break;
case 0x04: _7SEG_A = 0;//4
_7SEG_B = 1;
_7SEG_C = 1;
_7SEG_D = 0;
_7SEG_E = 0;
_7SEG_F = 1;
_7SEG_G = 1;
_7SEG_H = 0;
break;
case 0x05: _7SEG_A = 1;//5
_7SEG_B = 0;
_7SEG_C = 1;
_7SEG_D = 1;
_7SEG_E = 0;
_7SEG_F = 1;
_7SEG_G = 1;
_7SEG_H = 0;
break;
case 0x06: _7SEG_A = 1;//6
_7SEG_B = 0;
_7SEG_C = 1;
_7SEG_D = 1;
_7SEG_E = 1;
_7SEG_F = 1;
_7SEG_G = 1;
_7SEG_H = 0;
break;
case 0x07: _7SEG_A = 1;//7
_7SEG_B = 1;
_7SEG_C = 1;
_7SEG_D = 0;
_7SEG_E = 0;
_7SEG_F = 1;
_7SEG_G = 0;
_7SEG_H = 0;
break;
case 0x08: _7SEG_A = 1;//8
_7SEG_B = 1;
_7SEG_C = 1;
_7SEG_D = 1;
_7SEG_E = 1;
_7SEG_F = 1;
_7SEG_G = 1;
_7SEG_H = 0;
break;
case 0x09: _7SEG_A = 1;//9
_7SEG_B = 1;
_7SEG_C = 1;
_7SEG_D = 0;
_7SEG_E = 0;
_7SEG_F = 1;
_7SEG_G = 1;
_7SEG_H = 0;
break;
case 0x0A: _7SEG_A = 0;//.
_7SEG_B = 0;
_7SEG_C = 0;
_7SEG_D = 0;
_7SEG_E = 0;
_7SEG_F = 0;
_7SEG_G = 0;
_7SEG_H = 1;
break;
case 0x0B: _7SEG_A = 0;//-
_7SEG_B = 0;
_7SEG_C = 0;
_7SEG_D = 0;
_7SEG_E = 0;
_7SEG_F = 0;
_7SEG_G = 1;
_7SEG_H = 0;
break;
case 0x0C: _7SEG_A = 0;//Close
_7SEG_B = 0;
_7SEG_C = 0;
_7SEG_D = 0;
_7SEG_E = 0;
_7SEG_F = 0;
_7SEG_G = 0;
_7SEG_H = 0;
break;
case 0x0D: _7SEG_A = 1;//E
_7SEG_B = 0;
_7SEG_C = 0;
_7SEG_D = 1;
_7SEG_E = 1;
_7SEG_F = 1;
_7SEG_G = 1;
_7SEG_H = 0;
break;
case 0x0E: _7SEG_A = 1;//C
_7SEG_B = 0;
_7SEG_C = 0;
_7SEG_D = 1;
_7SEG_E = 1;
_7SEG_F = 1;
_7SEG_G = 0;
_7SEG_H = 0;
break;
case 0x0F: _7SEG_A = 1;//A
_7SEG_B = 1;
_7SEG_C = 1;
_7SEG_D = 0;
_7SEG_E = 1;
_7SEG_F = 1;
_7SEG_G = 1;
_7SEG_H = 0;
break;
case 0x10: _7SEG_A = 0;//r
_7SEG_B = 0;
_7SEG_C = 0;
_7SEG_D = 0;
_7SEG_E = 1;
_7SEG_F = 0;
_7SEG_G = 1;
_7SEG_H = 0;
break;
case 0x11: _7SEG_A = 1;//S
_7SEG_B = 0;
_7SEG_C = 1;
_7SEG_D = 1;
_7SEG_E = 0;
_7SEG_F = 1;
_7SEG_G = 1;
_7SEG_H = 0;
break;
case 0x12: _7SEG_A = 1;//P
_7SEG_B = 1;
_7SEG_C = 0;
_7SEG_D = 0;
_7SEG_E = 1;
_7SEG_F = 1;
_7SEG_G = 1;
_7SEG_H = 0;
break;
case 0x13: _7SEG_A = 1;//C.
_7SEG_B = 0;
_7SEG_C = 0;
_7SEG_D = 1;
_7SEG_E = 1;
_7SEG_F = 1;
_7SEG_G = 0;
_7SEG_H = 1;
break;
case 0x14: _7SEG_A = 0;//d
_7SEG_B = 1;
_7SEG_C = 1;
_7SEG_D = 1;
_7SEG_E = 1;
_7SEG_F = 0;
_7SEG_G = 1;
_7SEG_H = 0;
break;
case 0x15: _7SEG_A = 0;//n
_7SEG_B = 0;
_7SEG_C = 1;
_7SEG_D = 0;
_7SEG_E = 1;
_7SEG_F = 0;
_7SEG_G = 1;
_7SEG_H = 0;
break;
case 0x16: _7SEG_A = 0;//V
_7SEG_B = 1;
_7SEG_C = 0;
_7SEG_D = 0;
_7SEG_E = 1;
_7SEG_F = 1;
_7SEG_G = 1;
_7SEG_H = 0;
break;
case 0x17: _7SEG_A = 0;//h
_7SEG_B = 0;
_7SEG_C = 1;
_7SEG_D = 0;
_7SEG_E = 1;
_7SEG_F = 1;
_7SEG_G = 1;
_7SEG_H = 0;
break;
case 0x18: _7SEG_A = 0;//L
_7SEG_B = 0;
_7SEG_C = 0;
_7SEG_D = 1;
_7SEG_E = 1;
_7SEG_F = 1;
_7SEG_G = 0;
_7SEG_H = 0;
break;
case 0x19: _7SEG_A = 0;//U
_7SEG_B = 1;
_7SEG_C = 1;
_7SEG_D = 1;
_7SEG_E = 1;
_7SEG_F = 1;
_7SEG_G = 0;
_7SEG_H = 0;
break;
case 0x1A: _7SEG_A = 0;//b
_7SEG_B = 0;
_7SEG_C = 1;
_7SEG_D = 1;
_7SEG_E = 1;
_7SEG_F = 1;
_7SEG_G = 1;
_7SEG_H = 0;
break;
case 0x1B: _7SEG_A = 1;//g
_7SEG_B = 1;
_7SEG_C = 1;
_7SEG_D = 1;
_7SEG_E = 0;
_7SEG_F = 1;
_7SEG_G = 1;
_7SEG_H = 0;
break;
case 0x1C: _7SEG_A = 0;//V.
_7SEG_B = 1;
_7SEG_C = 0;
_7SEG_D = 0;
_7SEG_E = 1;
_7SEG_F = 1;
_7SEG_G = 1;
_7SEG_H = 1;
break;
case 0x1D: _7SEG_A = 0;//r.
_7SEG_B = 0;
_7SEG_C = 0;
_7SEG_D = 0;
_7SEG_E = 1;
_7SEG_F = 0;
_7SEG_G = 1;
_7SEG_H = 1;
break;
case 0x1E: _7SEG_A = 1;//g.
_7SEG_B = 1;
_7SEG_C = 1;
_7SEG_D = 1;
_7SEG_E = 0;
_7SEG_F = 1;
_7SEG_G = 1;
_7SEG_H = 1;
break;
case 0x1F: _7SEG_A = 0;//b.
_7SEG_B = 0;
_7SEG_C = 1;
_7SEG_D = 1;
_7SEG_E = 1;
_7SEG_F = 1;
_7SEG_G = 1;
_7SEG_H = 1;
break;
//number + dot
case 0x20: _7SEG_A = 1;//0.
_7SEG_B = 1;
_7SEG_C = 1;
_7SEG_D = 1;
_7SEG_E = 1;
_7SEG_F = 1;
_7SEG_G = 0;
_7SEG_H = 1;
break;
case 0x21: _7SEG_A = 0;//1.
_7SEG_B = 1;
_7SEG_C = 1;
_7SEG_D = 0;
_7SEG_E = 0;
_7SEG_F = 0;
_7SEG_G = 0;
_7SEG_H = 1;
break;
case 0x22: _7SEG_A = 1;//2.
_7SEG_B = 1;
_7SEG_C = 0;
_7SEG_D = 1;
_7SEG_E = 1;
_7SEG_F = 0;
_7SEG_G = 1;
_7SEG_H = 1;
break;
case 0x23: _7SEG_A = 1;//3.
_7SEG_B = 1;
_7SEG_C = 1;
_7SEG_D = 1;
_7SEG_E = 0;
_7SEG_F = 0;
_7SEG_G = 1;
_7SEG_H = 1;
break;
case 0x24: _7SEG_A = 0;//4.
_7SEG_B = 1;
_7SEG_C = 1;
_7SEG_D = 0;
_7SEG_E = 0;
_7SEG_F = 1;
_7SEG_G = 1;
_7SEG_H = 1;
break;
case 0x25: _7SEG_A = 1;//5.
_7SEG_B = 0;
_7SEG_C = 1;
_7SEG_D = 1;
_7SEG_E = 0;
_7SEG_F = 1;
_7SEG_G = 1;
_7SEG_H = 1;
break;
case 0x26: _7SEG_A = 1;//6.
_7SEG_B = 0;
_7SEG_C = 1;
_7SEG_D = 1;
_7SEG_E = 1;
_7SEG_F = 1;
_7SEG_G = 1;
_7SEG_H = 1;
break;
case 0x27: _7SEG_A = 1;//7.
_7SEG_B = 1;
_7SEG_C = 1;
_7SEG_D = 0;
_7SEG_E = 0;
_7SEG_F = 1;
_7SEG_G = 0;
_7SEG_H = 1;
break;
case 0x28: _7SEG_A = 1;//8.
_7SEG_B = 1;
_7SEG_C = 1;
_7SEG_D = 1;
_7SEG_E = 1;
_7SEG_F = 1;
_7SEG_G = 1;
_7SEG_H = 1;
break;
case 0x29: _7SEG_A = 1;//9.
_7SEG_B = 1;
_7SEG_C = 1;
_7SEG_D = 0;
_7SEG_E = 0;
_7SEG_F = 1;
_7SEG_G = 1;
_7SEG_H = 1;
break;
default: break;
}
switch(seg_num)
{
case 0x00: _7SEG_COM5 = 0;
break;
case 0x01: _7SEG_COM4 = 0;
break;
case 0x02:
_7SEG_COM3 = 0;
break;
case 0x03: if(engineering_f)
_7SEG_H = 1;
_7SEG_COM2 = 0;
break;
case 0x04: _7SEG_COM1 = 0;
break;
default: break;
}
DELAY_X2us(100);
_7SEG_COM0 = 1;
_7SEG_COM1 = 1;
_7SEG_COM2 = 1;
_7SEG_COM3 = 1;
_7SEG_COM4 = 1;
_7SEG_COM5 = 1;
}
SFRPAGE = SFRPAGE_BUF;
}
void SEGMENT_REG_REFRESH(void)
{
//for display voltage (V)
unsigned long voltage;
unsigned char voltage_ten_thousand;
unsigned char voltage_thousand;
unsigned char voltage_hundred;
unsigned char voltage_ten;
unsigned char voltage_unit;
unsigned long DAC_buf =0x0000;
//for display pattern index
unsigned char hundred;
unsigned char ten;
unsigned char unit;
if(Keyboard ==1)
{
switch(Keyboard_Item_Index)
{
case 0: //VGH
voltage = VGH_VGL_A*0.05+ 3.2;
voltage_ten = voltage/10 ;
voltage = voltage%10;
SEG[5] = 0x16;
SEG[4] = 0x1B;
SEG[3] = 0x17;
if(voltage_ten!=0x00)
{
SEG[2] = voltage_ten;
SEG[1] = voltage_unit + 0x20; //add dot
SEG[0] = voltage_hundred;
}
else
{
SEG[2] = voltage_thousand + 0x20; //add dot
SEG[1] = voltage_hundred;
SEG[0] = voltage_ten;
}
break;
case 1: //VGL
voltage = VGH_VGL_B*0.05+ 1.2;
voltage_ten = voltage/10 ;
voltage = voltage%10;
SEG[5] = 0x16;
SEG[4] = 0x1B;
SEG[3] = 0x18;
if(voltage_ten!=0x00)
{
SEG[2] = voltage_ten;
SEG[1] = voltage_unit + 0x20; //add dot
SEG[0] = voltage_hundred;
}
else
{
SEG[2] = voltage_thousand + 0x20; //add dot
SEG[1] = voltage_hundred;
SEG[0] = voltage_ten;
}
break;
// Button Control to switch voltage for adjustment. Keyboard_Item_Index //corresponds each voltage VGH/VGL...
//=======================================================================================
void Button_Check()
{
if(!UP_BUTTON)
{
Debounce_Cnt++;
if(Debounce_Cnt > 5)
{
Debounce_Cnt = 0;
Up_Button_f = 1;
Action_f = 0;
Up_Hold_Cnt++;
if(Up_Hold_Cnt > 100)
{
Up_Hold_Cnt = 0;
Up_Button_Hold_f = 1;
if(Keyboard == 1)
{
BUZZER();
}
else
{
BUZZER();
DELAY_X2us(50000);
BUZZER();
DELAY_X2us(50000);
}
}
}
}
else if(!DOWN_BUTTON)
{
Debounce_Cnt++;
if(Debounce_Cnt > 5)
{
Debounce_Cnt = 0;
Down_Button_f = 1;
Action_f = 0;
Down_Hold_Cnt++;
if(Down_Hold_Cnt > 100)
{
Down_Hold_Cnt = 0;
Down_Button_Hold_f = 1;
if(Keyboard==1)
{
BUZZER();
}
}
}
}
else if(!LEFT_BUTTON)
{
Debounce_Cnt++;
if(Debounce_Cnt > 5)
{
Debounce_Cnt = 0;
Left_Button_f = 1;
Action_f = 0;
Left_Hold_Cnt++;
if(Keyboard == 1)
{
}
else
{
BUZZER();
DELAY_X2us(50000);
BUZZER();
DELAY_X2us(50000);
}
if(Left_Hold_Cnt > 100)
{
Left_Hold_Cnt = 0;
Left_Button_Hold_f = 1;
//BUZZER();
}
}
}
else if(!RIGHT_BUTTON)
{
Debounce_Cnt++;
if(Debounce_Cnt > 5)
{
Debounce_Cnt = 0;
Right_Button_f = 1;
Action_f = 0;
Right_Hold_Cnt++;
if(Keyboard == 1)
{
}
else
{
POWER_SLEEP();
//BUZZER();
DELAY_X2us(50000);
//BUZZER();
DELAY_X2us(50000);
}
if(Right_Hold_Cnt > 100)
{
Right_Hold_Cnt = 0;
Right_Button_Hold_f = 1;
//BUZZER();
}
}
}
else if(!ENTER_BUTTON)
{
Debounce_Cnt++;
if(Debounce_Cnt > 5)
{
Debounce_Cnt = 0;
Enter_Button_f = 1;
Action_f = 0;
Enter_Hold_Cnt++;
if(Enter_Hold_Cnt > 100)
{
Enter_Hold_Cnt = 0;
Enter_Button_Hold_f = 1;
BUZZER();
DELAY_X2us(50000);
BUZZER();
DELAY_X2us(50000);
}
}
}
else
{
Action_f = 1;
Debounce_Cnt = 0;
Up_Hold_Cnt = 0;
Down_Hold_Cnt = 0;
Left_Hold_Cnt = 0;
Right_Hold_Cnt = 0;
Enter_Hold_Cnt = 0;
}
}
void Button_Function()
{
//int i;
if(Up_Button_Hold_f)
{
Up_Button_f = 0;
Up_Button_Hold_f = 0;
if(Keyboard ==1)
{
Keyboard_Adj(Keyboard_Item_Index,3);
}
else
{
returnPatternZero();
}
//Keyboard = !Keyboard;
}
else if(Down_Button_Hold_f)
{
Down_Button_f = 0;
Down_Button_Hold_f = 0;
BUZZER();
check_ID();
// DELAY_X2us(5000);
// if(Keyboard ==1)
// {
//
// Keyboard_Adj(Keyboard_Item_Index,2);
//
// }
}
else if(Left_Button_Hold_f)
{
Left_Button_f = 0;
Left_Button_Hold_f = 0;
}
else if(Right_Button_Hold_f)
{
Right_Button_f = 0;
Right_Button_Hold_f = 0;
//DC Power wake up
POWER_INITIAL();
DELAY_X2us(5000);
returnPatternZero();
}
else if(Enter_Button_Hold_f)
{
Enter_Button_f = 0;
Enter_Button_Hold_f = 0;
Keyboard = !Keyboard;
}
else if(Up_Button_f)
{
Up_Button_f = 0;
if(Keyboard ==1)
{
Keyboard_Adj(Keyboard_Item_Index,1);
}
else
{
if(Pattern_Index<Total_Pattern-1)
{
Pattern_Index++;
}
else
{
Pattern_Index=0;
}
quickPattern();
}
}
else if(Down_Button_f)
{
Down_Button_f = 0;
if(Keyboard ==1)
{
Keyboard_Adj(Keyboard_Item_Index,0);
}
else
{
if(Pattern_Index>0)
{
Pattern_Index--;
}
else
{
Pattern_Index=Total_Pattern-1;
}
quickPattern();
}
}
else if(Left_Button_f)
{
Left_Button_f = 0;
if(Keyboard ==1)
{
if(Keyboard_Item_Index >0)
{
Keyboard_Item_Index-=1 ;
}
else
{
Keyboard_Item_Index = Total_Keyboard_Item_Index-1;
}
}
else
{
returnPatternZero();
}
}
else if(Right_Button_f)
{
Right_Button_f = 0;
if(Keyboard ==1)
{
if(Keyboard_Item_Index < Total_Keyboard_Item_Index-1)
{
Keyboard_Item_Index +=1 ;
}
else
{
Keyboard_Item_Index = 0;
}
}
else
{
//DC Power wake up
POWER_INITIAL();
DELAY_X2us(5000);
returnPatternZero();
}
}
else if(Enter_Button_f)
{
Enter_Button_f = 0;
}
}
void main(void)
{
while(1)
{
Button_Check();
if(Action_f)
{
Button_Function();
}
SEGMENT_REG_REFRESH();
SEGMENT_DISPLAY();
}
}
答案 0 :(得分：0)
在您定义中，电压是一个int值：
unsigned long voltage;
您不能做这样的事情：
voltage = VGH_VGL_B*0.05+ 1.2;
带有整数。
我想您应该完全避免使用float。