我正在开发一个控制 DIY RC卡车的 Arduino 项目，该卡车读取 RC 接收器的输出引脚，并且应该相应地对几个引脚进行PWM 。这些引脚连接到采用 PWM 的电机控制器上。
这就是问题所在。我的反向工作完美，但在向前的引脚上，我只得到随机活动。我正在使用Arduino Mega 2560。
这是代码。该问题已在其下方发布：
#include <Servo.h>
//Create variables for three channels
int RXCH[3];
volatile int RXSG[3];
int RXOK[3];
int PWMSG[3];
byte vooruit;
byte achteruit;
Servo stuur;
int mv = 13;
int ma = 10;
void setup() {
Serial.begin(115200);
stuur.attach(8);
//Assign PPM input pins. The receiver output pins are conected as below to non-PWM Digital connectors:
RXCH[0] = 6; //Throttle
RXCH[1] = 7; //Steering
//RXCH[2] = 5; //Nothing yet
//RXCH[3] = 2; //Nothing yet
//RXCH[4] = 7; //Nothing yet
//RXCH[5] = 8; //Nothing yet
for (int i = 0; i < 3; i++){
pinMode(RXCH[i], INPUT);
}
//TCCR1B = TCCR1B & 0b11111000 | 0x01;
//TCCR2B = TCCR2B & 0b11111000 | 0x01;
}
void loop() {
// Read RX values
for (int i = 0; i < 3; i++){ //For each of the 6 channels:
RXSG[i] = pulseIn(RXCH[i], HIGH, 20000); //Read the receiver signal
if (RXSG[i] == 0) { //Error catching
RXSG[i] = RXOK[i];
} else {
RXOK[i] = RXSG[i];
}
//Substitute the high values to a value between -255 and 255
PWMSG[0] = map(RXSG[0], 1000, 2000, -255, 255);
//Servo values, calibrated according to my steering servo.
PWMSG[1] = map(RXSG[1], 1000, 2000, 24, 169);
//Make sure that the value stays within the desired boundaries.
constrain (PWMSG[i], -255, 255);
//For debugginf purposes
Serial.print(" || Ch: ");
Serial.print(i);
Serial.print(" / PWMSG: ");
Serial.print(PWMSG[i]);
}
delay (5);
// Car goes forwards
if (PWMSG[0] > 40)
{
MV();
}
// Car goes backwards
if (PWMSG[0] < -40)
{
MA();
}
// Car stops
else
{
stopmotor();
}
stuur.write(PWMSG[1]);
Serial.println();
}
void MV()
{
vooruit = PWMSG[0];
analogWrite (mv, vooruit);
digitalWrite (ma, LOW);
Serial.print(" vooruit: ");
Serial.print(vooruit);
}
void MA()
{
achteruit = abs(PWMSG[0]);
analogWrite (ma, achteruit);
digitalWrite (mv, LOW);
Serial.print(" achteruit: ");
Serial.print(achteruit);
}
void stopmotor()
{
digitalWrite (ma, LOW);
digitalWrite (mv, LOW);
}
我真的不知道代码是否被认为是漂亮的，或者我是否为此犯了一些基本错误。
这是我尝试以正确方式进行的第一个项目之一，发表评论等，欢迎所有评论良好的批评。
代码应该做什么：
- 向前移动发射器上的摇杆，小车前进，速度应根据摇杆的位置。
- 将发射器上的摇杆向后移动，汽车后退，速度应根据摇杆的位置。
- 向左或向右移动发射器上的摇杆，车内的舵机应根据 Arduino 计算的值做出反应。您可能想知道为什么我不将伺服直接放在发射器上。嗯，那是因为我对这个项目有更多未来的想法，现在我可以更容易地校准它。
问题：
- 当我将发射器上的操纵杆向前移动，串行监视器打开时，我在串行监视器上得到正确的值，但引脚 13 上的 LED 只是随机闪烁，我必须说非常暗淡。
我已经尝试用 int 替换 byte 之类的东西，但它没有效果。其余代码工作正常。
使用一些新代码，我从每个“阶段”得到串行响应，除了控制引脚的最后阶段。
#include <Servo.h>
//Create variables for channels
Servo wheel;
int MFORWARD_PIN = 13;
#define MBACKWARD_PIN 10
#define WHEEL_PIN 8
#define THROTTLE_PIN 6
#define STEERING_PIN 7
void setup() {
Serial.begin(115200);
wheel.attach(WHEEL_PIN);
pinMode(THROTTLE_PIN, INPUT);
pinMode(STEERING_PIN, INPUT);
pinMode(MFORWARD_PIN, OUTPUT);
pinMode(MBACKWARD_PIN, OUTPUT);
//TCCR1B = TCCR1B & 0b11111000 | 0x01;
//TCCR2B = TCCR2B & 0b11111000 | 0x01;
}
void loop() {
int throttle = read_throttle();
int steering = read_steering();
delay (5);
throttle_handle(throttle);
steering_handle(steering);
}
// Read RX values
int read_throttle(){
int throttle = pulseIn(THROTTLE_PIN, HIGH, 20000);
throttle = map(throttle, 1000, 2000, -255, 255); //Substitute the high values to a value between -255 and 255.
constrain (throttle, -255, 255); //Make sure that the value stays within the desired boundaries.
//Serial.println(throttle);
}
int read_steering() {
int steering = pulseIn(STEERING_PIN, HIGH, 20000);
steering = map(steering, 1000, 2000, 24, 169); //Servo values, calibrated according to my steering servo.
constrain (steering, 24, 169); //Make sure that the value stays within the disired boundaries.
//Serial.println("steering");
}
void move_forward(int val) {
analogWrite (MFORWARD_PIN, val);
digitalWrite (MBACKWARD_PIN, LOW);
Serial.print(" vooruit: ");
Serial.print(val);
}
void move_backward(int val)
{
val = abs(val);
analogWrite (MBACKWARD_PIN, val);
digitalWrite (MFORWARD_PIN, LOW);
Serial.print(" achteruit: ");
Serial.print(val);
}
void move_stop()
{
digitalWrite (MFORWARD_PIN, LOW);
digitalWrite (MBACKWARD_PIN, LOW);
}
void throttle_handle(int throttle) {
//Serial.print("throttle");
if (throttle > 40) {
move_forward(throttle);
}
if (throttle < -40) {
move_backward(throttle);
}
else {
move_stop();
}
}
void steering_handle(int steering) {
wheel.write(steering);
// Serial.println("steering:");
// Serial.print(steering);
}