completed busio i2c demo

[Adafruit_Blinka-hackapet.git] / examples / pi_busio_i2c.py

diff --git a/examples/pi_busio_i2c.py b/examples/pi_busio_i2c.py
new file mode 100644 (file)
index 0000000..6e8e0ac
--- /dev/null
+++ b/examples/pi_busio_i2c.py
@@ -0,0 +1,33 @@
+import sys
+import time
+sys.path.append('/home/pi/Adafruit_Micropython_Blinka/src')
+sys.path.append('/home/pi/Adafruit_Python_GPIO')
+sys.path.append('/home/pi/Adafruit_Python_PureIO')
+
+import board
+import digitalio
+import busio
+
+print("hello blinka!")
+
+i2c = busio.I2C(board.SCL, board.SDA)
+
+print("I2C devices found: ", [hex(i) for i in i2c.scan()])
+
+if not 0x18 in i2c.scan():
+    print("Didn't find MCP9808")
+    exit()
+
+def temp_c(data):
+    value = data[0] << 8 | data[1]
+    temp = (value & 0xFFF) / 16.0
+    if value & 0x1000:
+        temp -= 256.0
+    return temp
+
+while True:
+    i2c.writeto(0x18, bytes([0x05]), stop=False)
+    result = bytearray(2)
+    i2c.readfrom_into(0x18, result)
+    print(temp_c(result))
+    time.sleep(0.5)