From bcf6ba58139197eaaba05abcdbf147ea68f57f9a Mon Sep 17 00:00:00 2001
From: ladyada <limor@ladyada.net>
Date: Fri, 29 Sep 2017 00:06:25 -0400
Subject: [PATCH] logger demo

---
 Introducing_Gemma_M0/Gemma_Logger.py      | 24 +++++++++++++++++++++++
 Introducing_Gemma_M0/Gemma_Logger_boot.py | 11 +++++++++++
 2 files changed, 35 insertions(+)
 create mode 100644 Introducing_Gemma_M0/Gemma_Logger.py
 create mode 100644 Introducing_Gemma_M0/Gemma_Logger_boot.py

diff --git a/Introducing_Gemma_M0/Gemma_Logger.py b/Introducing_Gemma_M0/Gemma_Logger.py
new file mode 100644
index 000000000..a8fa70889
--- /dev/null
+++ b/Introducing_Gemma_M0/Gemma_Logger.py
@@ -0,0 +1,24 @@
+import board
+import digitalio
+import microcontroller
+import time
+
+led = digitalio.DigitalInOut(board.D13)
+led.switch_to_output()
+
+try:
+    with open("/temperature.txt", "a") as fp:
+        while True:
+            temp = microcontroller.cpu.temperature
+            # do the C-to-F conversion here if you would like
+            fp.write('{0:f}\n'.format(temp))
+            fp.flush()
+            led.value = not led.value
+            time.sleep(1)
+except OSError as e:
+    delay = 0.5
+    if e.args[0] == 28:
+        delay = 0.25
+    while True:
+        led.value = not led.value
+        time.sleep(delay)
diff --git a/Introducing_Gemma_M0/Gemma_Logger_boot.py b/Introducing_Gemma_M0/Gemma_Logger_boot.py
new file mode 100644
index 000000000..13082b5b2
--- /dev/null
+++ b/Introducing_Gemma_M0/Gemma_Logger_boot.py
@@ -0,0 +1,11 @@
+import digitalio
+import board
+import storage
+
+switch = digitalio.DigitalInOut(board.D0)
+switch.direction = digitalio.Direction.INPUT
+switch.pull = digitalio.Pull.UP
+
+# If the D0 is connected to ground with a wire
+# CircuitPython can write to the drive
+storage.remount("/", switch.value)