我不明白为什么我的代码没有写入我的SD卡。我尝试了多种其他方法来获取卡上的数据。代码没有在页面底部进入我的IF循环。可能是我输入了错误的密码以获取数据吗？我正在使用Arduino mega上的RX3 15引脚来获取数据吗？那个插针会被认为是插针63吗？我在网上看了一张图，就是这么说的。
#include <SD.h>
#include <SPI.h>
#include <Wire.h>
File mySensorData;
int chipSelect = 63;
String inputstring = ""; //a string to hold incoming data from the PC
String sensorstring = ""; //a string to hold the data from the Atlas Scientific product
boolean input_string_complete = false; //have we received all the data from the PC
boolean sensor_string_complete = false; //have we received all the data from the Atlas Scientific product
void setup() { //set up the hardware
SD.begin(chipSelect);
pinMode(10, OUTPUT);
Serial.begin(9600); //set baud rate for the hardware serial port_0 to 9600
Serial3.begin(9600); //set baud rate for software serial port_3 to 9600
inputstring.reserve(10); //set aside some bytes for receiving data from the PC
sensorstring.reserve(30); //set aside some bytes for receiving data from Atlas Scientific product
}
void serialEvent() { //if the hardware serial port_0 receives a char
inputstring = Serial.readStringUntil(13); //read the string until we see a <CR>
input_string_complete = true; //set the flag used to tell if we have received a completed string from the PC
}
void serialEvent3() { //if the hardware serial port_3 receives a char
sensorstring = Serial3.readStringUntil(13); //read the string until we see a <CR>
sensor_string_complete = true; //set the flag used to tell if we have received a completed string from the PC
}
void loop() { //here we go...
if (input_string_complete == true) { //if a string from the PC has been received in its entirety
Serial3.print(inputstring); //send that string to the Atlas Scientific product
Serial3.print('\r'); //add a <CR> to the end of the string
inputstring = ""; //clear the string
input_string_complete = false; //reset the flag used to tell if we have received a completed string from the PC
}
if (sensor_string_complete == true) { //if a string from the Atlas Scientific product has been received in its entirety
if (isdigit(sensorstring[0]) == false) { //if the first character in the string is a digit
Serial.println(sensorstring); //send that string to the PC's serial monitor
}
else //if the first character in the string is NOT a digit
{
print_EC_data(); //then call this function
}
sensorstring = ""; //clear the string
sensor_string_complete = false; //reset the flag used to tell if we have received a completed string from the Atlas Scientific product
}
}
void print_EC_data(void) { //this function will pars the string
char sensorstring_array[30]; //we make a char array
char *EC; //char pointer used in string parsing
char *TDS; //char pointer used in string parsing
char *SAL; //char pointer used in string parsing
char *GRAV; //char pointer used in string parsing
float f_ec; //used to hold a floating point number that is the EC
sensorstring.toCharArray(sensorstring_array, 30); //convert the string to a char array
EC = strtok(sensorstring_array, ","); //let's pars the array at each comma
TDS = strtok(NULL, ","); //let's pars the array at each comma
SAL = strtok(NULL, ","); //let's pars the array at each comma
GRAV = strtok(NULL, ","); //let's pars the array at each comma
if(mySensorData){
Serial.print("EC:"); //we now print each value we parsed separately
Serial.println(EC); //this is the EC value
Serial.print("TDS:"); //we now print each value we parsed separately
Serial.println(TDS); //this is the TDS value
Serial.print("SAL:"); //we now print each value we parsed separately
Serial.println(SAL); //this is the salinity value
Serial.print("GRAV:"); //we now print each value we parsed separately
Serial.println(GRAV); //this is the specific gravity
Serial.println(); //this just makes the output easier to read
mySensorData= SD.open("CPData", FILE_WRITE);
mySensorData.print(EC);
mySensorData.close();
}
}