Question

怎样快速的将arduino读到的数据从串口输出？

小白学生党一枚，最近做课题开始用到arduino，把霍尔元件传感器连到anolog的管脚想要读数然后进行处理，但是用serial.print读数太慢，用示波器测试能画出好看的方波，但用arduino取到的数据太慢，画不出波形，求指点怎样更快速地读进来数据？

代码是这样的（有一部分是读imu板子的）,不胜感激

#include <TextFinder.h>

#define PERIOD 1 // [ms]

/*** Vars for IMU ***/
TextFinder finder(Serial3);
const int NUMBER_OF_FIELDS = 3;
float rpy[NUMBER_OF_FIELDS];

int Pina = 0;
int Pinb = 1;
int va = 0;
int vb = 0; /

void setup()
{
Serial.begin(57600);
Serial3.begin(57600); // init the Serial3 port to get data from the IMU

pinMode(Pina, INPUT);
pinMode(Pinb, INPUT);

delay(500);

initIMU();
}

void loop()
{
// print manager timer
static unsigned long timer = 0;
static unsigned long currentTime = 0;

/************************************************************/
/*** Request after a specific period for the data
/************************************************************/
currentTime = millis();
if(currentTime - timer >= PERIOD)
{
// Request one output frame from the IMU
// #f only requests one reply, replies are still bound to the internal 20ms (50Hz) time raster.
// So worst case delay that #f can add is 19.99ms.

va = analogRead(Pina);
vb = analogRead(Pinb);
Serial3.write("#f");

/************************************************************/
/*** Get the IMU values
/************************************************************/

int fieldIndex = 0;

// search the Serial Buffer as long as the header character is found
boolean found_HeaderChar = finder.find("#YPR=");

if (found_HeaderChar)
{

while(fieldIndex < NUMBER_OF_FIELDS)
{
rpy[fieldIndex++] = finder.getFloat();
}
}
Serial.print(va);
Serial.print(",");
Serial.print(vb);
Serial.print(",");
/************************************************************/
/*** Print out the values
/*** Format: yaw, pitch, roll, left_Encoder, right_Encoder
/************************************************************/
if (found_HeaderChar)
{
// print IMU values
for(fieldIndex=0; fieldIndex < NUMBER_OF_FIELDS; fieldIndex++)
{

Serial.print(rpy[fieldIndex]);
Serial.print(",");
}
Serial.println("");
}

timer = millis();
}
}

/********************************/
/*** Initialize Functions
/********************************/

void initIMU()
{
// Output CALIBRATED SENSOR data of all 9 axes in TEXT format. & Turn off continuous streaming output & Disable error message output
Serial3.write("#ot#o0#oe0");
Serial3.flush();
}

Answer 1

你把串口速度升上去应该就没有问题了 你试试 115200吧

追问

我改了，不行呢，因为imu板子的输出是57600，这里改成115200以后度数变得特别慢了TAT

追答

忽然想起来，你是怎么看输出数据的？是那种串口助手一行行显示出来的么？

追问

serial monitor, 私信我吧。。再追问就要花金币了。。