// python function add_event_detect(gpio, edge, callback=None, bouncetime=0
static PyObject *py_add_event_detect(PyObject *self, PyObject *args, PyObject *kwargs)
{
unsigned int gpio;
int channel, edge, result;
unsigned int bouncetime = 0;
PyObject *cb_func = NULL;
char *kwlist[] = {"gpio", "edge", "callback", "bouncetime", NULL};
if (!PyArg_ParseTupleAndKeywords(args, kwargs, "ii|Oi", kwlist, &channel, &edge, &cb_func, &bouncetime))
return NULL;
if (cb_func != NULL && !PyCallable_Check(cb_func))
{
PyErr_SetString(PyExc_TypeError, "Parameter must be callable");
return NULL;
}
if (get_gpio_number(channel, &gpio))
return NULL;
// check channel is set up as an input
if (gpio_direction[gpio] != INPUT)
{
PyErr_SetString(PyExc_RuntimeError, "You must setup() the GPIO channel as an input first");
return NULL;
}
// is edge valid value
edge -= PY_EVENT_CONST_OFFSET;
if (edge != RISING_EDGE && edge != FALLING_EDGE && edge != BOTH_EDGE)
{
PyErr_SetString(PyExc_ValueError, "The edge must be set to RISING, FALLING or BOTH");
return NULL;
}
if (check_gpio_priv())
return NULL;
if ((result = add_edge_detect(gpio, edge, bouncetime)) != 0) // starts a thread
{
if (result == 1)
{
PyErr_SetString(PyExc_RuntimeError, "Edge detection already enabled for this GPIO channel");
return NULL;
} else {
PyErr_SetString(PyExc_RuntimeError, "Failed to add edge detection");
return NULL;
}
}
if (cb_func != NULL)
if (add_py_callback(gpio, cb_func) != 0)
return NULL;
Py_RETURN_NONE;
}
// python function add_event_callback(gpio, callback, bouncetime=0)
static PyObject *py_add_event_callback(PyObject *self, PyObject *args, PyObject *kwargs)
{
unsigned int gpio;
int channel;
unsigned int bouncetime = 0;
PyObject *cb_func;
char *kwlist[] = {"gpio", "callback", "bouncetime", NULL};
if (!PyArg_ParseTupleAndKeywords(args, kwargs, "iO|i", kwlist, &channel, &cb_func, &bouncetime))
return NULL;
if (!PyCallable_Check(cb_func))
{
PyErr_SetString(PyExc_TypeError, "Parameter must be callable");
return NULL;
}
if (get_gpio_number(channel, &gpio))
return NULL;
// check channel is set up as an input
if (gpio_direction[gpio] != INPUT)
{
PyErr_SetString(WrongDirectionException, "You must setup() the GPIO channel as an input first");
return NULL;
}
if (!gpio_event_added(gpio))
{
PyErr_SetString(AddEventException, "Add event detection using add_event_detect first before adding a callback");
return NULL;
}
if (add_py_callback(gpio, bouncetime, cb_func) != 0)
return NULL;
Py_INCREF(Py_None);
return Py_None;
}
// python function add_event_callback(gpio, callback)
static PyObject *py_add_event_callback(PyObject *self, PyObject *args, PyObject *kwargs)
{
unsigned int gpio;
unsigned int sys_gpio;
int channel;
PyObject *cb_func;
char *kwlist[] = {"gpio", "callback", NULL};
if (!PyArg_ParseTupleAndKeywords(args, kwargs, "iO|i", kwlist, &channel, &cb_func))
return NULL;
if (!PyCallable_Check(cb_func))
{
PyErr_SetString(PyExc_TypeError, "Parameter must be callable");
return NULL;
}
if (get_gpio_number(channel, &gpio, &sys_gpio))
return NULL;
// check channel is set up as an input
if (gpio_direction[sys_gpio] != INPUT)
{
PyErr_SetString(PyExc_RuntimeError, "You must setup() the GPIO channel as an input first");
return NULL;
}
if (!gpio_event_added(sys_gpio))
{
PyErr_SetString(PyExc_RuntimeError, "Add event detection using add_event_detect first before adding a callback");
return NULL;
}
if (add_py_callback(sys_gpio, cb_func) != 0)
return NULL;
Py_RETURN_NONE;
}