113 lines
No EOL
3.1 KiB
C
113 lines
No EOL
3.1 KiB
C
/*
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Copyright (c) 2013 Adafruit
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Author: Justin Cooper
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Permission is hereby granted, free of charge, to any person obtaining a copy of
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this software and associated documentation files (the "Software"), to deal in
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the Software without restriction, including without limitation the rights to
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use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
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of the Software, and to permit persons to whom the Software is furnished to do
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so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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*/
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#include "Python.h"
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#include "constants.h"
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#include "common.h"
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#include "c_adc.h"
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// python function cleanup()
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static PyObject *py_cleanup(PyObject *self, PyObject *args)
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{
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// unexport the ADC
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adc_cleanup();
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Py_RETURN_NONE;
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}
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// python function setup()
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static PyObject *py_setup_adc(PyObject *self, PyObject *args)
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{
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adc_setup();
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Py_RETURN_NONE;
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}
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// python function read(channel)
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static PyObject *py_read(PyObject *self, PyObject *args)
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{
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unsigned int ain;
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int value;
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char *channel;
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PyObject *py_value;
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if (!PyArg_ParseTuple(args, "s", &channel))
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return NULL;
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if (!get_adc_ain(channel, &ain)) {
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PyErr_SetString(PyExc_ValueError, "Invalid AIN key or name.");
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return NULL;
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}
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read_value(ain, &value);
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py_value = Py_BuildValue("i", value);
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return py_value;
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}
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static const char moduledocstring[] = "ADC functionality of a BeagleBone using Python";
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PyMethodDef adc_methods[] = {
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{"setup", py_setup_adc, METH_VARARGS, "Set up and start the ADC channel."},
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{"read", (PyCFunction)py_read, METH_VARARGS, "Read the analog value for the channel" },
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{"cleanup", py_cleanup, METH_VARARGS, "Clean up ADC."},
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//{"setwarnings", py_setwarnings, METH_VARARGS, "Enable or disable warning messages"},
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{NULL, NULL, 0, NULL}
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};
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#if PY_MAJOR_VERSION > 2
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static struct PyModuleDef bbadcmodule = {
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PyModuleDef_HEAD_INIT,
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"ADC", // name of module
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moduledocstring, // module documentation, may be NULL
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-1, // size of per-interpreter state of the module, or -1 if the module keeps state in global variables.
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adc_methods
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};
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#endif
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#if PY_MAJOR_VERSION > 2
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PyMODINIT_FUNC PyInit_ADC(void)
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#else
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PyMODINIT_FUNC initADC(void)
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#endif
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{
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PyObject *module = NULL;
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#if PY_MAJOR_VERSION > 2
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if ((module = PyModule_Create(&bbadcmodule)) == NULL)
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return NULL;
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#else
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if ((module = Py_InitModule3("ADC", adc_methods, moduledocstring)) == NULL)
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return;
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#endif
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define_constants(module);
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#if PY_MAJOR_VERSION > 2
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return module;
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#else
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return;
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#endif
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} |