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blueSolder
2016-12-26 16:34:47 +11:00
committed by GitHub
parent 5aa08351c2
commit 51c38843d9
1 changed files with 51 additions and 1 deletions
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source/py_gpio.c
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@ -749,6 +749,54 @@ static PyObject *py_selftest(PyObject *self, PyObject *args)
static const char moduledocstring[] = "GPIO functionality of a CHIP using Python";
/*
mine for changing pin directipn
*/
static PyObject *py_set_direction(PyObject *self, PyObject *args, PyObject *kwargs)
{
int gpio;
char *channel;
int direction;
static char *kwlist[] = { "channel", "direction", NULL };
clear_error_msg();
if (!PyArg_ParseTupleAndKeywords(args, kwargs, "si|ii", kwlist, &channel, &direction))
return NULL;
if (!module_setup) {
init_module();
}
if (direction != INPUT && direction != OUTPUT)
{
PyErr_SetString(PyExc_ValueError, "An invalid direction was passed to setup()");
return NULL;
}
if (get_gpio_number(channel, &gpio) < 0) {
char err[2000];
snprintf(err, sizeof(err), "Invalid channel %s. (%s)", channel, get_error_msg());
PyErr_SetString(PyExc_ValueError, err);
return NULL;
}
if (gpio_set_direction(gpio, direction) < 0) {
char err[2000];
snprintf(err, sizeof(err), "Error setting direction %d on channel %s. (%s)", direction, channel, get_error_msg());
PyErr_SetString(PyExc_RuntimeError, err);
return NULL;
}
remember_gpio_direction(gpio, direction);
Py_RETURN_NONE;
}
PyMethodDef gpio_methods[] = {
{"setup", (PyCFunction)py_setup_channel, METH_VARARGS | METH_KEYWORDS, "Set up the GPIO channel, direction and (optional) pull/up down control\nchannel - Either: CHIP board pin number (not R8 GPIO 00..nn number). Pins start from 1\n or : CHIP GPIO name\ndirection - INPUT or OUTPUT\n[pull_up_down] - PUD_OFF (default), PUD_UP or PUD_DOWN\n[initial] - Initial value for an output channel"},
{"cleanup", py_cleanup, METH_VARARGS, "Clean up by resetting all GPIO channels that have been used by this program to INPUT with no pullup/pulldown and no event detection"},
@ -763,9 +811,11 @@ PyMethodDef gpio_methods[] = {
{"setwarnings", py_setwarnings, METH_VARARGS, "Enable or disable warning messages"},
{"get_gpio_base", py_gpio_base, METH_VARARGS, "Get the XIO base number for sysfs"},
{"selftest", py_selftest, METH_VARARGS, "Internal unit tests"},
{ "direction", (PyCFunction)py_set_direction, METH_VARARGS, "Change direction of gpio channel. Either INPUT or OUTPUT\n" },
{NULL, NULL, 0, NULL}
};
#if PY_MAJOR_VERSION > 2
static struct PyModuleDef rpigpiomodule = {
PyModuleDef_HEAD_INIT,
@ -815,4 +865,4 @@ PyMODINIT_FUNC initGPIO(void)
#else
return;
#endif
}
}