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以下草圖適用於Arduino Nano克隆。它等待一個START命令，然後從一個I2C從設備收集數據，組裝它以便登錄SD卡，將其寫入卡，將其打印到串行監視器並重復。我已經測試並重新測試。記錄標題和30行數據中的3行後，SD卡日誌文件總是停止，但串行監視器顯示所有預期數據。從未在我的任何測試中產生SD寫入錯誤。爲什麼SD卡沒有錯誤地停止記錄？
我很感激任何想法，爲什麼SD停止記錄和如何解決它。
Arduino的草圖
#include <Wire.h>
#include <Servo.h>
#include <SD.h>
#include <SPI.h>
// Uncomment the #define below to enable internal polling of data.
#define POLLING_ENABLED
//define slave i2c address
#define I2C_SLAVE_ADDRESS 9
/* ===================================
Arduino Nano Connections
ESC (PWM) Signal - Pin 9 (1000ms min, 2000ms max)
S.Port Signal - Pin 10
SPI Connections
MOSI = Pin 11
MISO = Pin 12
SCLK = PIN 13
I2C Connections
SDA = Pin A4
SCL = Pin A5
Start/Stop Switches
Start = Pin 2 => INT0
Stop = Pin 3 => INT1
===================================*/
Servo esc; // Servo object for the ESC - PIN 9
const unsigned long pause = 800; // Number of ms between readings
const unsigned long testDelay = 30000; // Number of ms between tests
const int CS_pin = 10; // Pin to use for CS (SS) on your board
const int Startpin = 2;
const int Stoppin = 3;
const int readings = 3; // Number of readings to take at every step
const int steps = 5; // Number of steps to stop the ESC and take readings
const byte HALT = 0;
int ESC = 0;
int throttle = 0;
int increment;
volatile bool STOP = 0;
volatile bool START = 0;
const String header = "% Thr,Thrust,Curr,Volts,RPM,Cell1,Cell2,Cell3,Cell4,Cell5,Cell6";
char buffer0[33]; // Buffer for I2C received data
char buffer1[33]; // Buffer for I2C received data
String logEntry = " GOT NO DATA "; //52 bytes
void setup() {
Wire.begin();
Serial.begin(115200);
pinMode(Startpin, INPUT_PULLUP);
pinMode(Stoppin, INPUT_PULLUP);
// Attach an interrupt to the ISR vector
attachInterrupt(digitalPinToInterrupt(Startpin), start_ISR, LOW);
attachInterrupt(digitalPinToInterrupt(Stoppin), stop_ISR, LOW);
esc.attach(9, 1000, 2000);
// attaches the ESC on pin 9 to the servo object and sets min and max pulse width
esc.write(HALT); // Shut down Motor NOW!
increment = 180/(steps - 1);
// Number of degrees to move servo (ESC) per step (servo travel is 0-180 degrees so 180 = 100% throttle)
delay(500);
Serial.println(" Thrust Meter I2C Master");
//Print program name
//Initialize SD Card
if (!SD.begin(CS_pin)) {
Serial.println("Card Failure");
}
Serial.println("Card Ready");
//Write Log File Header to SD Card
writeSD(header);
Serial.println(header);
}
void loop() {
if (START) {
Serial.println("Start Pressed");
while (!STOP) {
for (throttle = 0; throttle <= 180; throttle += increment) {
for (int x = 0; x < readings; x++) {
if (STOP) {
esc.write(HALT); // Shut down Motor NOW!
Serial.println("Halting Motor");
} else {
wait (pause);
esc.write(throttle); // increment the ESC
wait (200);
ESC = throttle * 100/180;
getData(buffer0);
wait (100);
getData(buffer1);
String logEntry = String(ESC) + "," + String(buffer1) + "," + String(buffer0);
writeSD(logEntry);
Serial.println(logEntry);
}
}
}
for (throttle = 180; throttle >= 0; throttle -= increment) {
for (int x = 0; x < readings; x++) {
if (STOP) {
esc.write(HALT); // Shut down Motor NOW!
Serial.println("Halting Motor");
} else {
wait (pause);
esc.write(throttle); // increment the ESC
wait (200);
ESC = throttle * 100/180;
getData(buffer0);
wait (100);
getData(buffer1);
String logEntry = String(ESC) + "," + String(buffer1) + "," + String(buffer0);
writeSD(logEntry);
Serial.println(logEntry);
}
}
}
Serial.println("End of Test Pass");
wait (testDelay);
}
esc.write(HALT); // Shut down Motor NOW!
}
}
void writeSD(String logdata) {
File logFile = SD.open("NANO_LOG.csv", FILE_WRITE);
if (logFile) {
logFile.println(logdata);
logFile.close();
} else {
Serial.println("Error writing log data");
}
}
void wait(unsigned long i) {
unsigned long time = millis() + i;
while(millis()<time) { }
}
void start_ISR() {
START = 1;
STOP = 0;
}
void stop_ISR() {
STOP = 1;
START = 0;
}
void getData(char* buff) {
Wire.requestFrom(9, 32);
for (byte i = 0; i < 32 && Wire.available(); ++i) {
buff[i] = Wire.read();
if (buff[i] == '#') {
buff[i] = '\0';
break;
}
}
}
這是SD卡的內容：
% Thr,Thrust,Curr,Volts,RPM,Cell1,Cell2,Cell3,Cell4,Cell5,Cell6
0,-12,0.00,15.76,0,3.10,4.20,3.96,3.96,0.00,0.00
0,-12,0.00,15.76,0,3.10,4.20,3.96,3.96,0.00,0.00
0,128,0.00,15.76,0,3.10,4.20,3.96,3.96,0.00,0.00
這是從串行監控輸出：
Thrust Meter I2C Master
Card Ready
% Thr,Thrust,Curr,Volts,RPM,Cell1,Cell2,Cell3,Cell4,Cell5,Cell6
Start Pressed
0,-12,0.00,15.76,0,3.10,4.20,3.96,3.96,0.00,0.00
0,-12,0.00,15.76,0,3.10,4.20,3.96,3.96,0.00,0.00
0,128,0.00,15.76,0,3.10,4.20,3.96,3.96,0.00,0.00
25,2062,0.00,15.76,0,3.10,4.20,3.96,3.96,0.00,0.00
25,2520,0.00,15.75,0,3.10,4.20,3.96,3.96,0.00,0.00
25,2710,0.00,15.75,0,3.10,4.20,3.96,3.96,0.00,0.00
50,519,0.00,15.75,0,3.10,4.20,3.96,3.96,0.00,0.00
50,216,0.00,15.76,0,3.10,4.20,3.96,3.96,0.00,0.00
50,2288,0.00,15.76,0,3.10,4.20,3.96,3.96,0.00,0.00
75,890,0.00,15.76,0,3.10,4.20,3.96,3.96,0.00,0.00
75,891,0.00,15.76,0,3.10,4.20,3.96,3.96,0.00,0.00
75,1386,0.00,15.76,0,3.10,4.20,3.96,3.96,0.00,0.00
100,2621,0.00,15.76,0,3.10,4.20,3.96,3.96,0.00,0.00
100,2424,0.00,15.76,0,3.10,4.20,3.96,3.96,0.00,0.00
100,692,0.00,15.76,0,3.10,4.20,3.96,3.96,0.00,0.00
100,3409,0.00,15.76,0,3.10,4.20,3.96,3.96,0.00,0.00
100,227,0.00,15.76,0,3.10,4.20,3.96,3.96,0.00,0.00
100,3349,0.00,15.76,0,3.10,4.20,3.96,3.96,0.00,0.00
75,2220,0.00,15.76,0,3.10,4.20,3.96,3.96,0.00,0.00
75,2249,0.00,15.76,0,3.10,4.20,3.96,3.96,0.00,0.00
75,509,0.00,15.76,0,3.10,4.20,3.96,3.96,0.00,0.00
50,1977,0.00,15.76,0,3.10,4.20,3.96,3.96,0.00,0.00
50,2986,0.00,15.76,0,3.10,4.20,3.96,3.96,0.00,0.00
50,546,0.00,15.76,0,3.10,4.20,3.96,3.96,0.00,0.00
25,3746,0.00,15.76,0,3.10,4.20,3.96,3.96,0.00,0.00
25,3337,0.00,15.76,0,3.10,4.20,3.96,3.96,0.00,0.00
25,3015,0.00,15.76,0,3.10,4.20,3.96,3.96,0.00,0.00
0,96,0.00,15.76,0,3.10,4.20,3.96,3.96,0.00,0.00
0,-12,0.00,15.76,0,3.10,4.20,3.96,3.96,0.00,0.00
0,-14,0.00,15.76,0,3.10,4.20,3.96,3.96,0.00,0.00
End of Test Pass
如果你讓'logFile'不斷打開，它會起作用嗎？ –
好主意。剛剛嘗試過。相同的結果。太糟糕了。我真的認爲你可能會有一些東西。感謝這個想法。 –
這是猜測推斷髮生了什麼。這裏還有一些。你如何閱讀'SD'文件來顯示其內容？ 'ls -la file_name'說什麼？文件的長度？ 'cat -A file_name'顯示什麼？如果每次寫入不同的文件會發生什麼？你是否嘗試用另一個替換SD卡？ –