arduino labview上位机修改下位机的字符串

tobychao

本人写了一个两个电机联动的程序，已经可以正常工作了，程序中红色字符串4到7位为修改速度的4位16进制，10到14是修改位移量的5位16进制，想通过labview通过上位机对这组字符串的速度和位移量 进行修改。不知怎么编写。请教一下大家。谢谢啦


#include <LiquidCrystal.h>

int PinA = 21;
long Pos = 0;
int rad = 0;
int Counter = 0;
int i = 0;
int a = 3;
unsigned long time = 0;
LiquidCrystal lcd(8, 9, 4, 5, 6, 7);

void setup() {
  Serial3.begin(9600);
   lcd.begin(16, 2);
   pinMode (PinA,INPUT);
   attachInterrupt(2, blinkA, FALLING);  
   time = millis();
}

void loop() {
  if (i == 0){
    Serial3.print("0AR\r\n");
    delay(2000);
     Serial3.print("0MP00\r\n");
    i = 1;
  }
  if ((millis() - time) > 1000){
    Pos += Counter;
    rad = Pos/1000;
    lcd.clear();
    lcd.print("Rotating speed:");
    lcd.setCursor(0, 1);
    lcd.print (rad);
    time = millis();
    Pos = 0;
  }
  if (Counter >= 1000){
    if (rad < 20){
     Serial3.print("0MV01903200003\r\n");//speed 400mm/s  displacement 0.9mm
    }
    else {
     Serial3.print("0MV00503200350\r\n");//speed 0mm/s displacement 25.44mm
    }   
     Pos += Counter;
     Counter = 0;
  }
}

void blinkA() {   
    Counter ++;
}

guizibing

LABVIEW小白，坐等大师回复