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%module(docstring="Python interface to libmraa") mraa
%feature("autodoc", "3");
%include typemaps.i
%include carrays.i
%array_class(uint8_t, uint8Array);
// uart write()
%typemap(in) (const char* data, int length) {
if (PyByteArray_Check($input)) {
// whilst this may seem 'hopeful' it turns out this is safe
$1 = (char*) PyByteArray_AsString($input);
$2 = PyByteArray_Size($input);
} else {
PyErr_SetString(PyExc_ValueError, "bytearray expected");
return NULL;
}
}
// i2c write()
%typemap(in) (const uint8_t *data, int length) {
if (PyByteArray_Check($input)) {
// whilst this may seem 'hopeful' it turns out this is safe
$1 = (uint8_t*) PyByteArray_AsString($input);
$2 = PyByteArray_Size($input);
} else {
PyErr_SetString(PyExc_ValueError, "bytearray expected");
return NULL;
}
}
// Spi write()
%typemap(in) (uint8_t *txBuf, int length) {
if (PyByteArray_Check($input)) {
// whilst this may seem 'hopeful' it turns out this is safe
$1 = (uint8_t*) PyByteArray_AsString($input);
$2 = PyByteArray_Size($input);
} else {
PyErr_SetString(PyExc_ValueError, "bytearray expected");
return NULL;
}
}
namespace mraa {
class I2c;
%typemap(out) uint8_t*
{
// need to loop over length
$result = PyByteArray_FromStringAndSize((char*) $1, arg2);
free($1);
}
class Spi;
%typemap(out) uint8_t*
{
// need to loop over length
$result = PyByteArray_FromStringAndSize((char*) $1, arg3);
free($1);
}
}
%newobject I2c::read(uint8_t *data, int length);
%newobject Spi::write(uint8_t *data, int length);
%newobject Uart::read(char* data, int length);
%newobject Spi::transfer(uint8_t *txBuf, uint8_t *rxBuf, int length);
// Uart::read()
%typemap(in) (char* data, int length) {
if (!PyInt_Check($input)) {
PyErr_SetString(PyExc_ValueError, "Expecting an integer");
return NULL;
}
$2 = PyInt_AsLong($input);
if ($2 < 0) {
PyErr_SetString(PyExc_ValueError, "Positive integer expected");
return NULL;
}
$1 = (char*) malloc($2 * sizeof(char));
}
%typemap(argout) (char* data, int length) {
Py_XDECREF($result); /* Blow away any previous result */
if (result < 0) { /* Check for I/O error */
free($1);
PyErr_SetFromErrno(PyExc_IOError);
return NULL;
}
// Append output value $1 to $result
$result = PyByteArray_FromStringAndSize((char*) $1, result);
free($1);
}
// I2c::read()
%typemap(in) (uint8_t *data, int length) {
if (!PyInt_Check($input)) {
PyErr_SetString(PyExc_ValueError, "Expecting an integer");
return NULL;
}
$2 = PyInt_AsLong($input);
if ($2 < 0) {
PyErr_SetString(PyExc_ValueError, "Positive integer expected");
return NULL;
}
$1 = (uint8_t*) malloc($2 * sizeof(uint8_t));
}
%typemap(argout) (uint8_t *data, int length) {
Py_XDECREF($result); /* Blow away any previous result */
if (result < 0) { /* Check for I/O error */
free($1);
PyErr_SetFromErrno(PyExc_IOError);
return NULL;
}
// Append output value $1 to $result
$result = PyByteArray_FromStringAndSize((char*) $1, result);
free($1);
}
// Spi::transfer()
%typemap(in) (uint8_t* txBuf, uint8_t* rxBuf, int length) {
if (!PyInt_Check($input)) {
PyErr_SetString(PyExc_ValueError, "Expecting an integer");
return NULL;
}
$3 = PyInt_AsLong($input);
if ($3 < 0) {
PyErr_SetString(PyExc_ValueError, "Positive integer expected");
return NULL;
}
$2 = (uint8_t*) malloc($3 * sizeof(uint8_t));
}
%typemap(argout) (uint8_t* txBuf, uint8_t* rxBuf, int length) {
Py_XDECREF($result); /* Blow away any previous result */
if (result != MRAA_SUCCESS) { /* Check for I/O error */
free($2);
PyErr_SetFromErrno(PyExc_IOError);
return NULL;
}
$result = PyByteArray_FromStringAndSize((char*) $2, $3);
free($2);
}
%include ../mraa.i
%init %{
//Adding mraa_init() to the module initialisation process
mraa_init();
%}
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