eda9d03547
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
46 lines
1.5 KiB
Python
46 lines
1.5 KiB
Python
#!/usr/bin/env python
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# Author: Henry Bruce <henry.bruce@intel.com>
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# Copyright (c) 2016 Intel Corporation.
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#
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# Permission is hereby granted, free of charge, to any person obtaining
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# a copy of this software and associated documentation files (the
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# "Software"), to deal in the Software without restriction, including
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# without limitation the rights to use, copy, modify, merge, publish,
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# distribute, sublicense, and/or sell copies of the Software, and to
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# permit persons to whom the Software is furnished to do so, subject to
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# the following conditions:
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#
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# The above copyright notice and this permission notice shall be
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# included in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE
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# Example Usage: Read from MCP3004 ADC pin 0 in single ended mode
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import mraa
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import time
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# initialise SPI
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dev = mraa.Spi(0)
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# prepare data to send
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txbuf = bytearray(3)
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txbuf[0] = 0x01
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txbuf[1] = 0x80
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txbuf[2] = 0x00
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while True:
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# send data through SPI
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rxbuf = dev.write(txbuf)
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value = ((rxbuf[1] & 0x03) << 8) | rxbuf[2]
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print(value)
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time.sleep(0.5)
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