From d6869d1ec4bd24cd2c3eafa534f0849b25ec5607 Mon Sep 17 00:00:00 2001
From: Clyne Sullivan <tullivan99@gmail.com>
Date: Thu, 28 Feb 2019 17:04:22 -0500
Subject: added basic code

---
 .../digital_interrupt_deferred.ino                 | 46 ++++++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100755 arduino/libraries/Bluefruit52Lib/examples/Hardware/digital_interrupt_deferred/digital_interrupt_deferred.ino

(limited to 'arduino/libraries/Bluefruit52Lib/examples/Hardware/digital_interrupt_deferred')

diff --git a/arduino/libraries/Bluefruit52Lib/examples/Hardware/digital_interrupt_deferred/digital_interrupt_deferred.ino b/arduino/libraries/Bluefruit52Lib/examples/Hardware/digital_interrupt_deferred/digital_interrupt_deferred.ino
new file mode 100755
index 0000000..464e31b
--- /dev/null
+++ b/arduino/libraries/Bluefruit52Lib/examples/Hardware/digital_interrupt_deferred/digital_interrupt_deferred.ino
@@ -0,0 +1,46 @@
+/*********************************************************************
+ This is an example for our Feather Bluefruit modules
+
+ Pick one up today in the adafruit shop!
+
+ Adafruit invests time and resources providing this open source code,
+ please support Adafruit and open-source hardware by purchasing
+ products from Adafruit!
+
+ MIT license, check LICENSE for more information
+ All text above, and the splash screen below must be included in
+ any redistribution
+*********************************************************************/
+
+/*
+ * This sketch demonstrate how to pass ISR_DEFFERED as additional parameter
+ * to defer callback from ISR context with attachInterrupt
+ */
+#include <Arduino.h>
+
+int interruptPin = A0;
+
+void setup()
+{
+  Serial.begin(115200);
+
+  pinMode(interruptPin, INPUT_PULLUP);
+
+  // ISR_DEFERRED flag cause the callback to be deferred from ISR context
+  // and invoked within a callback thread.
+  // It is required to use ISR_DEFERRED if callback function take long time 
+  // to run e.g Serial.print() or using any of Bluefruit API() which will
+  // potentially call rtos API
+  attachInterrupt(interruptPin, digital_callback, ISR_DEFERRED | CHANGE);
+}
+
+void loop()
+{
+  // nothing to do
+}
+
+void digital_callback(void)
+{
+  Serial.print("Pin value: ");
+  Serial.println(digitalRead(interruptPin));
+}
-- 
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