41 lines
1.4 KiB
Python
41 lines
1.4 KiB
Python
#!/usr/bin/env python
|
|
|
|
# Author: Henry Bruce <henry.bruce@intel.com>
|
|
# 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)
|
|
|