-
Notifications
You must be signed in to change notification settings - Fork 97
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Merge pull request #182 from WorldFamousElectronics/joel-m-branch-1
Support for Arduino DUE
- Loading branch information
Showing
4 changed files
with
184 additions
and
32 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,160 @@ | ||
| /* | ||
| Code to detect pulses from the PulseSensor, | ||
| using an interrupt service routine. | ||
|
|
||
| Here is a link to the tutorial\ | ||
| https://pulsesensor.com/pages/getting-advanced | ||
|
|
||
| Copyright World Famous Electronics LLC - see LICENSE | ||
| Contributors: | ||
| Joel Murphy, https://pulsesensor.com | ||
| Yury Gitman, https://pulsesensor.com | ||
| Bradford Needham, @bneedhamia, https://bluepapertech.com | ||
|
|
||
| Licensed under the MIT License, a copy of which | ||
| should have been included with this software. | ||
|
|
||
| This software is not intended for medical use. | ||
| */ | ||
|
|
||
| /* | ||
| Include the DueTimer library. If you don't have it, use library manager to get it. | ||
| You can also find it at https://github.com/ivanseidel/DueTimer | ||
| If you use the Servo library, probably want to include that before this inlude. Just sayin'... | ||
| This will grab the next available timer and call it sampleTimer for use throughout the code | ||
| */ | ||
| #include <DueTimer.h> | ||
| DueTimer sampleTimer = Timer.getAvailable(); | ||
|
|
||
| /* | ||
| Every Sketch that uses the PulseSensor Playground must | ||
| define USE_ARDUINO_INTERRUPTS before including PulseSensorPlayground.h. | ||
| Here, #define USE_ARDUINO_INTERRUPTS true tells the library to use | ||
| interrupts to automatically read and process PulseSensor data. | ||
|
|
||
| See PulseSensor_BPM_Alternative.ino for an example of not using interrupts. | ||
| */ | ||
| #define USE_ARDUINO_INTERRUPTS true | ||
| #include <PulseSensorPlayground.h> | ||
|
|
||
| /* | ||
| * Declare the interrupt service routine | ||
| * This will be used in setup as the interrupt callback in attachInterrupt | ||
| */ | ||
| void sampleTimer_ISR(){ | ||
| PulseSensorPlayground::OurThis->onSampleTime(); | ||
| } | ||
|
|
||
| /* | ||
| The format of our output. | ||
|
|
||
| Set this to PROCESSING_VISUALIZER if you're going to run | ||
| the Processing Visualizer Sketch. | ||
| See https://github.com/WorldFamousElectronics/PulseSensor_Amped_Processing_Visualizer | ||
|
|
||
| Set this to SERIAL_PLOTTER if you're going to run | ||
| the Arduino IDE's Serial Plotter. | ||
| */ | ||
| const int OUTPUT_TYPE = SERIAL_PLOTTER; | ||
|
|
||
| /* | ||
| Pinout: | ||
| PULSE_INPUT = Analog Input. Connected to the pulse sensor | ||
| purple (signal) wire. | ||
| PULSE_BLINK = digital Output. Connected to an LED (and 1K series resistor) | ||
| that will flash on each detected pulse. | ||
| PULSE_FADE = digital Output. PWM pin onnected to an LED (and 1K series resistor) | ||
| that will smoothly fade with each pulse. | ||
| NOTE: PULSE_FADE must be a pin that supports PWM. Do not use | ||
| pin 9 or 10, because those pins' PWM interferes with the sample timer. | ||
| THRESHOLD should be set higher than the PulseSensor signal idles | ||
| at when there is nothing touching it. The expected idle value | ||
| should be 512, which is 1/2 of the ADC range. To check the idle value | ||
| open a serial monitor and make note of the PulseSensor signal values | ||
| with nothing touching the sensor. THRESHOLD should be a value higher | ||
| than the range of idle noise by 25 to 50 or so. When the library | ||
| is finding heartbeats, the value is adjusted based on the pulse signal | ||
| waveform. THRESHOLD sets the default when there is no pulse present. | ||
| Adjust as neccesary. | ||
| */ | ||
| const int PULSE_INPUT = A0; | ||
| const int PULSE_BLINK = LED_BUILTIN; | ||
| const int PULSE_FADE = 5; | ||
| const int THRESHOLD = 550; // Adjust this number to avoid noise when idle | ||
|
|
||
| /* | ||
| All the PulseSensor Playground functions. | ||
| */ | ||
| PulseSensorPlayground pulseSensor; | ||
|
|
||
| void setup() { | ||
| /* | ||
| Use 115200 baud because that's what the Processing Sketch expects to read, | ||
| and because that speed provides about 11 bytes per millisecond. | ||
|
|
||
| If we used a slower baud rate, we'd likely write bytes faster than | ||
| they can be transmitted, which would mess up the timing | ||
| of readSensor() calls, which would make the pulse measurement | ||
| not work properly. | ||
| */ | ||
| Serial.begin(115200); | ||
|
|
||
| // Configure the PulseSensor manager. | ||
|
|
||
| pulseSensor.analogInput(PULSE_INPUT); | ||
| pulseSensor.blinkOnPulse(PULSE_BLINK); | ||
| pulseSensor.fadeOnPulse(PULSE_FADE); | ||
|
|
||
| pulseSensor.setSerial(Serial); | ||
| pulseSensor.setOutputType(OUTPUT_TYPE); | ||
| pulseSensor.setThreshold(THRESHOLD); | ||
|
|
||
| // Now that everything is ready, start reading the PulseSensor signal. | ||
| if (!pulseSensor.begin()) { | ||
| /* | ||
| PulseSensor initialization failed, | ||
| likely because our particular Arduino platform interrupts | ||
| aren't supported yet. | ||
|
|
||
| If your Sketch hangs here, try PulseSensor_BPM_Alternative.ino, | ||
| which doesn't use interrupts. | ||
| */ | ||
| for(;;) { | ||
| // Flash the led to show things didn't work. | ||
| digitalWrite(PULSE_BLINK, LOW); | ||
| delay(50); Serial.println('!'); | ||
| digitalWrite(PULSE_BLINK, HIGH); | ||
| delay(50); | ||
| } | ||
| } | ||
|
|
||
| /* This starts the sample timer interrupt. Do this last in the setup() routine. | ||
| * We are using Timer6 to avoid potential conflict with the servo library | ||
| * This timer selection could be better... | ||
| * Use pause() and resume() to start and stop sampling on the fly | ||
| * Check Resources folder in the library for more tools | ||
| */ | ||
| sampleTimer.attachInterrupt(sampleTimer_ISR); | ||
| sampleTimer.start(2000); // Calls every period microseconds | ||
|
|
||
| } | ||
|
|
||
| void loop() { | ||
| /* | ||
| Wait a bit. | ||
| We don't output every sample, because our baud rate | ||
| won't support that much I/O. | ||
| */ | ||
| delay(20); | ||
|
|
||
| // write the latest sample to Serial. | ||
| pulseSensor.outputSample(); | ||
|
|
||
| /* | ||
| If a beat has happened since we last checked, | ||
| write the per-beat information to Serial. | ||
| */ | ||
| if (pulseSensor.sawStartOfBeat()) { | ||
| pulseSensor.outputBeat(); | ||
| } | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters