有人可以解决我的“无效值没有被忽略，因为它应该是”错误吗？

Question

我收到错误：

void 值不应被忽略

有人可以帮我解决这个问题吗（我不是专业的 Arduino 编码员）？

当我编译它时，我在第 79 行收到错误：

done = radio.read( received_data, num_received_data );

我不知道如何解决它，甚至不知道这里发生了什么。

#include <Servo.h> 
#include <SPI.h>
#include "nRF24L01.h"
#include "RF24.h"
#include "printf.h"

RF24 radio(9,10);

Servo CH1;  
Servo CH2; 
Servo CH3;  
Servo CH4;  
Servo CH5;  
Servo CH6; 
int ch1; 
int ch2;
int ch3;
int ch4;
int ch5;
int ch6;
const int CH7 =  4;  
const int CH8 =  3;  
const int CH9 =  5;  
const int CH10 =  2;  
const int SIGNAL =  7;  
const uint64_t pipe = 0xE8E8F0F0E1LL;
uint8_t received_data[12];
uint8_t num_received_data =sizeof(received_data);
void setup(void)
{
delay(3000);  

CH1.attach(15); //right-y(AIL)
CH2.attach(16); //right-x(ELE)  
CH3.attach(19); //vol-batt (CH6)
CH4.attach(18); //left-x  (CH5)
CH5.attach(17); //left-y (RUD)
CH6.attach(14); //throt

pinMode(CH7, OUTPUT);
pinMode(CH8, OUTPUT);
pinMode(CH9, OUTPUT);
pinMode(CH10, OUTPUT);
pinMode(SIGNAL, OUTPUT);
Serial.begin(57600);
printf_begin();
printf("\n\rRF24/Reciever/\n\r");


  radio.begin();
  radio.openReadingPipe(1,pipe);
  radio.startListening();
  radio.printDetails(); 
}


void loop(void)
{
  
  
  

  if ( radio.available() )
  {
  digitalWrite(SIGNAL, HIGH) ;     
  }
  else {
  digitalWrite(SIGNAL, LOW) ; 
  }     

    bool done = false;
    int ESC_value;
    while (!done)
    
    {
 
      
      done = radio.read( received_data, num_received_data );

//////////////PWM//////////////
ch1=(received_data[1]); 
ch1=ch1+3;
CH1.write(ch1); 

ch2=(received_data[2]);
ch2=ch2+4;
CH2.write(ch2); 

ch3=(received_data[3]); 
ch3=ch3+4;
CH3.write(ch3);

ch4=(received_data[4]); 
ch4=ch4+4;
CH4.write(ch4); 
 
ch5=(received_data[5]); 
ch5=ch5+4;
CH5.write(ch5); 

ch6=(received_data[6]); 
ch6=ch6+4;
CH6.write(ch6); 
 
//////////////0-1//////////////
if ((received_data[7])>100) {
    digitalWrite(CH7, HIGH);
  }
  else {
    digitalWrite(CH7, LOW);
  } 

 //////////////   
if ((received_data[8])>100) {
    digitalWrite(CH8, HIGH);
  }
  else {
    digitalWrite(CH8, LOW);
  }  


printf("\n\r");
Serial.print("ROL:");Serial.print(radio.available()); Serial.print("\t");
Serial.print("PITCH:");Serial.print((received_data[2])); Serial.print("\t");
Serial.print("THROT:");Serial.print((received_data[1])); Serial.print("\t");
    }
  }

我会将其上传到我的 DIY RC 控制器的 atmega328p 上。

Answer 1

根据文档，

RF24::read()

方法返回

void

，即它不返回任何内容。您无法将返回值分配给您的

data

变量。