编写C语言代码实现测量2个信号发生器的频率和脉冲宽度
时间: 2024-02-18 21:03:44 浏览: 18
以下是一个简单的C语言代码实现,该代码使用Arduino板和计时器来测量两个信号发生器的频率和脉冲宽度:
```
#include <TimerOne.h>
// 设置输入引脚和计时器
const int inputPin1 = 2;
const int inputPin2 = 3;
const int timer1Pin1 = 11;
const int timer1Pin2 = 12;
// 设置计时器变量
volatile unsigned long int pulseCount1 = 0;
volatile unsigned long int pulseCount2 = 0;
volatile unsigned long int lastPulseCount1 = 0;
volatile unsigned long int lastPulseCount2 = 0;
volatile unsigned int pulseWidth1 = 0;
volatile unsigned int pulseWidth2 = 0;
// 定义计时器中断函数
void timer1_ISR() {
pulseWidth1 = (unsigned int)(pulseCount1 - lastPulseCount1);
pulseWidth2 = (unsigned int)(pulseCount2 - lastPulseCount2);
lastPulseCount1 = pulseCount1;
lastPulseCount2 = pulseCount2;
}
void setup() {
// 初始化串口
Serial.begin(9600);
// 设置输入引脚为输入模式
pinMode(inputPin1, INPUT);
pinMode(inputPin2, INPUT);
// 设置计时器
Timer1.initialize(1000); // 设置计时器频率为1kHz
Timer1.attachInterrupt(timer1_ISR); // 绑定中断函数
// 设置计时器引脚为输出模式
pinMode(timer1Pin1, OUTPUT);
pinMode(timer1Pin2, OUTPUT);
}
void loop() {
// 测量信号1的频率和脉冲宽度
pulseCount1 = 0;
digitalWrite(timer1Pin1, HIGH);
delayMicroseconds(10);
digitalWrite(timer1Pin1, LOW);
delay(1000);
float frequency1 = (float)(pulseCount1 - lastPulseCount1) / 1000.0;
float pulseWidth1_ms = (float)pulseWidth1 / 1000.0;
Serial.print("Signal 1 frequency: ");
Serial.print(frequency1);
Serial.print(" kHz, pulse width: ");
Serial.print(pulseWidth1_ms);
Serial.println(" ms");
// 测量信号2的频率和脉冲宽度
pulseCount2 = 0;
digitalWrite(timer1Pin2, HIGH);
delayMicroseconds(10);
digitalWrite(timer1Pin2, LOW);
delay(1000);
float frequency2 = (float)(pulseCount2 - lastPulseCount2) / 1000.0;
float pulseWidth2_ms = (float)pulseWidth2 / 1000.0;
Serial.print("Signal 2 frequency: ");
Serial.print(frequency2);
Serial.print(" kHz, pulse width: ");
Serial.print(pulseWidth2_ms);
Serial.println(" ms");
}
```
此代码将使用Arduino板的TimerOne库来设置计时器,并使用两个输入引脚来测量两个信号发生器的频率和脉冲宽度。通过调整计时器频率和脉冲宽度的测量时间,可以根据需要调整精度。