// python function value = gpio_function(gpio)
static PyObject*
py_gpio_function(PyObject *self, PyObject *args)
{
int gpio, channel, f;
PyObject *func;
if (!PyArg_ParseTuple(args, "i", &channel))
return NULL;
if ((gpio = channel_to_gpio(channel)) < 0)
return NULL;
f = gpio_function(gpio);
switch (f)
{
case 0 :
f = INPUT;
break;
case 1 :
f = OUTPUT;
break;
}
func = Py_BuildValue("i", f);
return func;
}
static int
verify_input(int channel, int *gpio)
{
if ((*gpio = channel_to_gpio(channel)) == -1)
return 0;
if ((gpio_direction[*gpio] != INPUT) && (gpio_direction[*gpio] != OUTPUT)) {
PyErr_SetString(WrongDirectionException, "GPIO channel has not been set up");
return 0;
}
return 1;
}
// channel2gpio binding
static PyObject*
py_channel_to_gpio(PyObject *self, PyObject *args)
{
int channel, gpio;
PyObject *func;
if (!PyArg_ParseTuple(args, "i", &channel))
return NULL;
if ((gpio = channel_to_gpio(channel)) < 0)
return NULL;
func = Py_BuildValue("i", gpio);
return func;
}
// python function setup(channel, direction, pull_up_down=PUD_OFF, initial=None)
static PyObject*
py_setup_channel(PyObject *self, PyObject *args, PyObject *kwargs)
{
int gpio, channel, direction;
int pud = PUD_OFF;
int initial = -1;
static char *kwlist[] = {"channel", "direction", "pull_up_down", "initial", NULL};
int func;
if (!PyArg_ParseTupleAndKeywords(args, kwargs, "ii|ii", kwlist, &channel, &direction, &pud, &initial))
return NULL;
if (direction != INPUT && direction != OUTPUT) {
PyErr_SetString(InvalidDirectionException, "An invalid direction was passed to setup()");
return NULL;
}
if (direction == OUTPUT)
pud = PUD_OFF;
if (pud != PUD_OFF && pud != PUD_DOWN && pud != PUD_UP) {
PyErr_SetString(InvalidPullException, "Invalid value for pull_up_down - should be either PUD_OFF, PUD_UP or PUD_DOWN");
return NULL;
}
if ((gpio = channel_to_gpio(channel)) < 0)
return NULL;
func = gpio_function(gpio);
if (gpio_warnings && // warnings enabled and
((func != 0 && func != 1) || // (already one of the alt functions or
(gpio_direction[gpio] == -1 && func == 1))) // already an output not set from this program)
{
PyErr_WarnEx(NULL, "This channel is already in use, continuing anyway. Use RPIO.setwarnings(False) to disable warnings.", 1);
}
// printf("Setup GPIO %d direction %d pud %d\n", gpio, direction, pud);
if (direction == OUTPUT && (initial == LOW || initial == HIGH)) {
// printf("Writing intial value %d\n",initial);
output_gpio(gpio, initial);
}
setup_gpio(gpio, direction, pud);
gpio_direction[gpio] = direction;
Py_INCREF(Py_None);
return Py_None;
}
// python function value = input(channel) without direction check
static PyObject*
py_forceinput_gpio(PyObject *self, PyObject *args)
{
int gpio, channel;
if (!PyArg_ParseTuple(args, "i", &channel))
return NULL;
if ((gpio = channel_to_gpio(channel)) < 0)
return NULL;
//printf("Input GPIO %d\n", gpio);
if (input_gpio(gpio))
Py_RETURN_TRUE;
else
Py_RETURN_FALSE;
}
// python function output(channel, value) without direction check
static PyObject*
py_forceoutput_gpio(PyObject *self, PyObject *args)
{
int gpio, channel, value;
if (!PyArg_ParseTuple(args, "ii", &channel, &value))
return NULL;
// printf("Output GPIO %d value %d\n", gpio, value);
if ((gpio = channel_to_gpio(channel)) < 0)
return NULL;
output_gpio(gpio, value);
Py_INCREF(Py_None);
return Py_None;
}
// python function output(channel, value) without direction check
static PyObject*
py_set_pullupdn(PyObject *self, PyObject *args, PyObject *kwargs)
{
int gpio, channel;
int pud = PUD_OFF;
static char *kwlist[] = {"channel", "pull_up_down", NULL};
if (!PyArg_ParseTupleAndKeywords(args, kwargs, "ii|ii", kwlist, &channel, &pud))
return NULL;
if ((gpio = channel_to_gpio(channel)) < 0)
return NULL;
// printf("Setting gpio %d PULLUPDN to %d", gpio, pud);
set_pullupdn(gpio, pud);
Py_INCREF(Py_None);
return Py_None;
}
// python function output(channel, value)
static PyObject*
py_output_gpio(PyObject *self, PyObject *args)
{
int gpio, channel, value;
if (!PyArg_ParseTuple(args, "ii", &channel, &value))
return NULL;
if ((gpio = channel_to_gpio(channel)) < 0)
return NULL;
if (gpio_direction[gpio] != OUTPUT) {
PyErr_SetString(WrongDirectionException, "The GPIO channel has not been set up as an OUTPUT");
return NULL;
}
// printf("Output GPIO %d value %d\n", gpio, value);
output_gpio(gpio, value);
Py_INCREF(Py_None);
return Py_None;
}
