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#include <IntervalTimer.h>
#include <SD.h>
#include <SPI.h>
#define LED_red 0
#define LED_IR 1
int SpO2_OpenMV = 0;
int SpO2_Raw_Zacurate = 0;
int SpO2_Raw_Fab = 0;
int Arr_SpO2_OpenMV[25000];
int Arr_SpO2_Raw_Zacurate[25000];
int Arr_SpO2_Raw_Fab[25000];
int Arr_micros[25000];
int counter = 0;
int led_counter = 0;
IntervalTimer sampleTimer;
IntervalTimer ledTimer;
void writelog() {
Arr_SpO2_OpenMV[counter] = SpO2_OpenMV;
Arr_SpO2_Raw_Zacurate[counter] = SpO2_Raw_Zacurate;
Arr_SpO2_Raw_Fab[counter] = SpO2_Raw_Fab;
Arr_micros[counter] = micros();
counter++;
}
void updateLEDs() {
if (led_counter < 6) {
digitalWrite(0, HIGH);
}
else if (led_counter < 12) {
digitalWrite(0, LOW);
}
else if (led_counter < 18) {
digitalWrite(1, HIGH);
}
else {
digitalWrite(1, LOW);
}
led_counter++;
if (led_counter > 72) {
led_counter = 0;
}
}
void setup() {
Serial.begin(115200); //USB serial port
Serial5.begin(19200); //OpenMV UART
analogReadResolution(16);
pinMode(0, OUTPUT);
pinMode(1, OUTPUT);
pinMode(13, OUTPUT);
SD.begin(BUILTIN_SDCARD);
delay(5000); //mostly to let the OpenMV board boot up
sampleTimer.begin(writelog, 200); // 200 us period
ledTimer.begin(updateLEDs, 100); // 100 us period
}
void loop() {
int i;
digitalWrite(13, HIGH);
if (Serial5.available() > 0) {
SpO2_OpenMV = Serial5.read();
}
SpO2_Raw_Zacurate = analogRead(4);
SpO2_Raw_Fab = analogRead(9);
if (counter == 25000) {
noInterrupts();
File dataFile = SD.open("datalog.txt", FILE_WRITE);
if (dataFile) {
for (i = 0; i < 25000; i++) {
dataFile.print(Arr_micros[i]);
dataFile.print(",");
dataFile.print(Arr_SpO2_OpenMV[i]);
dataFile.print(",");
dataFile.print(Arr_SpO2_Raw_Zacurate[i]);
dataFile.print(",");
dataFile.println(Arr_SpO2_Raw_Fab[i]);
}
dataFile.close();
}
counter = 0;
interrupts();
}
}