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当我使用两个超声波传感器时，我感到困惑，但是当使用一个传感器时，代码工作正常。请帮助我附上两个ultarsnic sensores（HC-SR04）到我的代码，并使这工作得很好，如何将两个超声波传感器添加到PIC微控制器
在这里我打算做的事情是我想保持与范围内的对象，如果对象移动LED灯光需要打开。
我使用的PIC 16F877A
工作代码用于一个超声波传感器
void main()
{
int a;
int b;
TRISB = 0b00010000; //RB4 as Input PIN (ECHO)
TRISC = 0; //C as Output PINs (LED)
T1CON = 0x10; //Initialize Timer Module
TRISD = 1; // 1 input 0 output ,related to LED (display)
while(1)
{
for(b=1; b<3; b++){
if (b=2){
TMR1H = 0; //Sets the Initial Value of Timer
TMR1L = 0; //Sets the Initial Value of Timer
PORTB.F1 = 1; //TRIGGER HIGH
Delay_us(10); //10uS Delay
PORTB.F1 = 0; //TRIGGER LOW
while(!PORTD.F0); //Waiting for Echo
T1CON.F0 = 1; //Timer Starts
while(PORTD.F0); //Waiting for Echo goes LOW
T1CON.F0 = 0; //Timer Stops
a = (TMR1L | (TMR1H<<8)); //Reads Timer Value
a = a/58.82; //Converts Time to Distance
a = a + 1; //Distance Calibration\
//formular s=ut
if(a != 4){
PORTC = 0b01111111; // turn on LEDs in the PIC
Delay_ms(5);
PORTC = 0; // turn on LEDs in the PIC
} else {
//out of range
PORTC = 0b00000000;
}
}
}
}
}
不两个ultarsonic sensers
void main()
{
int a;
int b;
TRISB = 0b00010000; //RB4 as Input PIN (ECHO)
TRISC = 0; //C as Output PINs (LED)
T1CON = 0x10; //Initialize Timer Module
TRISD = 1; // 1 input 0 output ,related to LED (display)
while(1)
{
for(b=1; b<3; b++){
if(b=1){
TMR1H = 0; //Sets the Initial Value of Timer
TMR1L = 0; //Sets the Initial Value of Timer
PORTB.F0 = 1; //TRIGGER HIGH
Delay_us(10); //10uS Delay
PORTB.F0 = 0; //TRIGGER LOW
while(!PORTD.F1); //Waiting for Echo
T1CON.F0 = 1; //Timer Starts
while(PORTD.F1); //Waiting for Echo goes LOW
T1CON.F0 = 0; //Timer Stops
a = (TMR1L | (TMR1H<<8)); //Reads Timer Value
a = a/58.82; //Converts Time to Distance
a = a + 1; //Distance Calibration\
//formular s=ut
if(a != 4){
// PORTB.F3 = 1;
// PORTD = 0xFC; // display number two in LED displa
// Delay_ms(5);
// PORTB.F3 = 0;
PORTC = 0b00000011; // turn on LEDs in the PIC
Delay_ms(5);
PORTC = 0; // turn on LEDs in the PIC
} else {
//out of range
PORTC = 0b00000000;
}
}
else if (b=2){
TMR1H = 0; //Sets the Initial Value of Timer
TMR1L = 0; //Sets the Initial Value of Timer
PORTB.F1 = 1; //TRIGGER HIGH
Delay_us(10); //10uS Delay
PORTB.F1 = 0; //TRIGGER LOW
while(!PORTD.F0); //Waiting for Echo
T1CON.F0 = 1; //Timer Starts
while(PORTD.F0); //Waiting for Echo goes LOW
T1CON.F0 = 0; //Timer Stops
a = (TMR1L | (TMR1H<<8)); //Reads Timer Value
a = a/58.82; //Converts Time to Distance
a = a + 1; //Distance Calibration\
//formular s=ut
if(a != 4){
PORTC = 0b01111111; // turn on LEDs in the PIC
Delay_ms(5);
PORTC = 0; // turn on LEDs in the PIC
} else {
//out of range
PORTC = 0b00000000;
}
}
}
}
}
请格式化代码为可读文本和岗位作为这样的答案代码。行间距使其几乎不可读。另外，如果不直接访问硬件和调试器，SO用户很难修复您的代码。你自己做这件事更容易。 “不工作”无助于描述你的问题。 – ThingyWotsit
'if（b = 1）'可能是错误的，你可能想'if（b == 1）'。你有几个这样的问题。 – linuxfan
好的，我会更新这个。 Linuxfan你是如果条件的核心。很快我会用正确的代码更新这篇文章。 –