From a0332a13b087930a6c77d5c02bac74bace98166b Mon Sep 17 00:00:00 2001 From: Henry Bruce Date: Fri, 11 Nov 2016 09:06:47 -0800 Subject: [PATCH] examples: Python MCP3004 ADC example (use with MinnowMax Calamari lure) Signed-off-by: Henry Bruce Signed-off-by: Brendan Le Foll --- examples/python/mcp3004.py | 40 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 examples/python/mcp3004.py diff --git a/examples/python/mcp3004.py b/examples/python/mcp3004.py new file mode 100644 index 0000000..b941c49 --- /dev/null +++ b/examples/python/mcp3004.py @@ -0,0 +1,40 @@ +#!/usr/bin/env python + +# Author: Henry Bruce +# Copyright (c) 2016 Intel Corporation. +# +# Permission is hereby granted, free of charge, to any person obtaining +# a copy of this software and associated documentation files (the +# "Software"), to deal in the Software without restriction, including +# without limitation the rights to use, copy, modify, merge, publish, +# distribute, sublicense, and/or sell copies of the Software, and to +# permit persons to whom the Software is furnished to do so, subject to +# the following conditions: +# +# The above copyright notice and this permission notice shall be +# included in all copies or substantial portions of the Software. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE +# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION +# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION +# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE + +# Read from MCP3004 ADC pin 0 in single ended mode +import mraa +import time + +dev = mraa.Spi(0) +txbuf = bytearray(3) +txbuf[0] = 0x01 +txbuf[1] = 0x80 +txbuf[2] = 0x00 + +while True: + rxbuf = dev.write(txbuf) + value = ((rxbuf[1] & 0x03) << 8) | rxbuf[2] + print value + time.sleep(0.5) +