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當我使用兩個超聲波傳感器時，我感到困惑，但是當使用一個傳感器時，代碼工作正常。請幫助我附上兩個ultarsnic sensores（HC-SR04）到我的代碼，並使這工作得很好，如何將兩個超聲波傳感器添加到PIC微控制器
在這裏我打算做的事情是我想保持與範圍內的對象，如果對象移動LED燈光需要打開。
我使用的PIC 16F877A
工作代碼用於一個超聲波傳感器
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;
}
}
}
}
}
不兩個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;
}
}
}
}
}
請格式化代碼爲可讀文本和崗位作爲這樣的答案代碼。行間距使其幾乎不可讀。另外，如果不直接訪問硬件和調試器，SO用戶很難修復您的代碼。你自己做這件事更容易。 「不工作」無助於描述你的問題。 – ThingyWotsit
'if（b = 1）'可能是錯誤的，你可能想'if（b == 1）'。你有幾個這樣的問題。 – linuxfan
好的，我會更新這個。 Linuxfan你是如果條件的核心。很快我會用正確的代碼更新這篇文章。 –