我不确定为什么我的SD卡在我运行我的代码时无法初始化（如下），但是当我只是检查Arduino是否正在使用Arduino库中的CardInfo代码读取它时。数据记录器来自Ada fruit，我连接的传感器是maxbotic。我已经尝试重置SD卡和Arduino并切换SD卡。当我验证Arduino中的代码时没有问题，所以我不完全确定为什么这不起作用。非常感谢任何帮助。
更新： 我能够通过移动
来获得SD卡的初始化if (!SD.begin(chipSelect)) {
error("Card failed, or not present");
}
Serial.println().
但现在它没有保存数据，也没有将数据打印为新行。当我添加代码的平均部分时，事情就变成了南方，因为在此之前它将数据打印为新行并且SD卡初始化。 我的时间非常错误我得到了像2165/165/165 165：165：85这样的日期。 attached image of circuit
#include <SPI.h>
#include <SD.h>
#include <Wire.h>
#include "RTClib.h"
/*
The goal of this code is to collect 10 data points a minute, average them, and store them to an SD card
*/
#define LOG_INTERVAL 6000 // mills between entries (reduce to take more/faster data)
// how many milliseconds before writing the logged data permanently to disk
// set it to the LOG_INTERVAL to write each time (safest)
// set it to 10*LOG_INTERVAL to write all data every 10 datareads, you could lose up to
// the last 10 reads if power is lost but it uses less power and is much faster!
#define SYNC_INTERVAL 1000 // mills between calls to flush() - to write data to the card
uint32_t syncTime = 0; // time of last sync()
#define ECHO_TO_SERIAL 1 // echo data to serial port
#define WAIT_TO_START 0// Wait for serial input in setup()
RTC_DS1307 RTC; // define the Real Time Clock object
// The analog pin that connect to the sensor
const int ultrasonicPin = A0; // declare the input pin for the ultrasonic sensor
unsigned long time;
// for the data logging shield, we use digital pin 10 for the SD cs line
const int chipSelect = 10;
const int numReadings = 10; //define number of samples to keep track of
int readings[numReadings]; //the readings from the analog input
int readIndex = 0; // the index of the current reading
int total = 0; // the running total
int average = 0; // the average
// the logging file
File logfile;
void error(char *str)
{
Serial.print("error: ");
Serial.println(str);
// red LED indicates error
//digitalWrite(redLEDpin, HIGH);
while(1);
}
void setup() {
Serial.begin(9600);
Serial.println();
//initialize all the readings to 0:
for(int thisReading = 0; thisReading < numReadings; thisReading++) {
readings[thisReading] = 0;
#if WAIT_TO_START
Serial.println("Type any character to start");
while (!Serial.available());
#endif //WAIT_TO_START
// initialize the SD card
Serial.print("Initializing SD card...");
// make sure that the default chip select pin is set to
// output, even if you don't use it:
pinMode(10, OUTPUT);
// see if the card is present and can be initialized:
if (!SD.begin(chipSelect)) {
error("Card failed, or not present");
}
Serial.println("card initialized.");
// create a new file
char filename[] = "LOGGER00.CSV";
for (uint8_t i = 0; i < 100; i++) {
filename[6] = i/10 + '0';
filename[7] = i%10 + '0';
if (! SD.exists(filename)) {
// only open a new file if it doesn't exist
logfile = SD.open(filename, FILE_WRITE);
break; // leave the loop!
}
}
if (! logfile) {
error("couldnt create file");
}
Serial.print("Logging to: ");
Serial.println(filename);
// connect to RTC
Wire.begin();
if (!RTC.begin()) {
logfile.println("RTC failed");
#if ECHO_TO_SERIAL
Serial.println("RTC failed");
#endif //ECHO_TO_SERIAL
}
logfile.println("millis,stamp,datetime,light,temp,vcc");
#if ECHO_TO_SERIAL
Serial.println("millis,stamp,datetime,light,temp,vcc");
#endif //ECHO_TO_SERIAL
// If you want to set the aref to something other than 5v
analogReference(EXTERNAL);
}
}
void loop() {
DateTime now;
// delay for the amount of time we want between readings
delay((LOG_INTERVAL -1) - (millis() % LOG_INTERVAL));
// log milliseconds since starting
uint32_t m = millis();
logfile.print(m); // milliseconds since start
logfile.print(", ");
#if ECHO_TO_SERIAL
Serial.print(m); // milliseconds since start
Serial.print(", ");
#endif
// fetch the time
now = RTC.now();
// log time
logfile.print(now.unixtime()); // seconds since 1/1/1970
logfile.print(", ");
logfile.print('"');
logfile.print(now.year(), DEC);
logfile.print("/");
logfile.print(now.month(), DEC);
logfile.print("/");
logfile.print(now.day(), DEC);
logfile.print(" ");
logfile.print(now.hour(), DEC);
logfile.print(":");
logfile.print(now.minute(), DEC);
logfile.print(":");
logfile.print(now.second(), DEC);
logfile.print('"');
#if ECHO_TO_SERIAL
Serial.print(now.unixtime()); // seconds since 1/1/1970
Serial.print(", ");
Serial.print('"');
Serial.print(now.year(), DEC);
Serial.print("/");
Serial.print(now.month(), DEC);
Serial.print("/");
Serial.print(now.day(), DEC);
Serial.print(" ");
Serial.print(now.hour(), DEC);
Serial.print(":");
Serial.print(now.minute(), DEC);
Serial.print(":");
Serial.print(now.second(), DEC);
Serial.print('"');
#endif //ECHO_TO_SERIAL
analogRead(ultrasonicPin);
delay(10);
int value = analogRead(ultrasonicPin);
for (int i=0; i < 50; i++){
if (millis() < 60000*(++i))
{
// subtract the last reading:
total = total - readings[readIndex];
//read from the sensor:
readings[readIndex] = analogRead(ultrasonicPin);
// add the reading to the total:
total = total + readings[readIndex];
//advance to the next position in the array:
readIndex = readIndex + 1;
//if we're at the end of the array
if (readIndex >= numReadings) {
//wrap around to the beginning:
readIndex = 0;
}
//calculate the average:
average = total / numReadings;
delay(6000);
}
else if (millis() == 60000*(++i))
{
logfile.print(",");
logfile.print(average);
Serial.print("Ultrasonic Reading = ");
Serial.println(average);
//Serial.print("Time: ");
//time = millis();
//prints time since program started
//Serial.println(time);
//wait a second so as not to send massive amounts of data
// Now we write data to disk! Don't sync too often - requires 2048 bytes of I/O to SD card
// which uses a bunch of power and takes time
if ((millis() - syncTime) < SYNC_INTERVAL) return;
syncTime = millis();
delay(100);
}
}
}
// this reads in cm