* @param data the byte to send
* @return data received on the miso line
*/
- char write(char data) {
- return (char) mraa_spi_write(m_spi, (uint8_t) data);
+ uint8_t writeByte(uint8_t data) {
+ return mraa_spi_write(m_spi, (uint8_t) data);
}
/**
* Write buffer of bytes to SPI device The pointer return has to be
* free'd by the caller. It will return a NULL pointer in cases of
* error
*
- * @param data buffer to send
+ * @param txBuf buffer to send
* @param length size of buffer to send
- * @return char* data received on the miso line. Same length as passed in
+ * @return uint8_t* data received on the miso line. Same length as passed in
*/
- char* write(char* data, size_t length) {
- return (char*) mraa_spi_write_buf(m_spi, (uint8_t *) data, (int) length);
+ uint8_t* write(uint8_t* txBuf, int length) {
+ return mraa_spi_write_buf(m_spi, txBuf, length);
}
#ifndef SWIG
/**
* @param length size of buffer to send
* @return Result of operation
*/
- mraa_result_t transfer(char* data, char* rxBuf, size_t length) {
- return mraa_spi_transfer_buf(m_spi, (uint8_t *) data, (uint8_t *)rxBuf, (int) length);
+ mraa_result_t transfer(uint8_t* txBuf, uint8_t* rxBuf, int length) {
+ return mraa_spi_transfer_buf(m_spi, txBuf, rxBuf, length);
}
#endif
/**
spi = new mraa::Spi(0);
- char data[] = {0x00, 100};
- char rxBuf[2];
- char *recv;
+ uint8_t data[] = {0x00, 100};
+ uint8_t rxBuf[2];
+ uint8_t *recv;
while (running == 0) {
int i;
for (i = 90; i < 130; i++) {
--- /dev/null
+#!/usr/bin/env node
+
+/*
+ * Author: Brendan Le Foll <brendan.le.foll@intel.com>
+ * Copyright (c) 2015 Intel Corporation.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+var m = require('mraa'); //require mraa
+
+// helper function to go from hex val to dec
+function char(x) { return parseInt(x, 16); }
+
+x = new m.Spi(0)
+buf = new Buffer(4)
+buf[0] = char('0xf4')
+buf[1] = char('0x2e')
+buf[2] = char('0x3e')
+buf[3] = char('0x4e')
+buf2 = x.write(buf)
+console.log("Sent: " + buf.toString('hex') + ". Received: " + buf2.toString('hex'))
+
+
--- /dev/null
+#!/usr/bin/env python
+
+# Author: Brendan Le Foll <brendan.le.foll@intel.com>
+# Copyright (c) 2015 Intel Corporation.
+#
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+#
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE
+
+import mraa as m
+import random as rand
+
+# Excuse the super boring example, I was out of fun devices to play with, this
+# will write and read the same data back to itself, a few 100 times, just short
+# MISO & MOSI on your board
+
+dev = m.Spi(0)
+
+for x in range(0,100):
+ txbuf = bytearray(4)
+ for y in range(0,4):
+ txbuf[y] = rand.randrange(0, 256)
+ rxbuf = dev.write(txbuf)
+ if rxbuf != txbuf:
+ print("We have an error captain!")
+ break
+ exit(1)
+
$2 = node::Buffer::Length($input);
}
+// Spi write()
+%typemap(in) (uint8_t *txBuf, int length) {
+ $1 = (uint8_t*) node::Buffer::Data($input);
+ $2 = node::Buffer::Length($input);
+}
+
+namespace mraa {
+class Spi;
+%typemap(out) uint8_t*
+{
+ // need to loop over length
+ $result = node::Buffer::New((char*) $1, arg3)->handle_;
+}
+}
+
%newobject I2c::read(uint8_t *data, int length);
+%newobject Spi::write(uint8_t *data, int length);
%typemap(in) (uint8_t *data, int length) {
int x;
}
}
+// Spi write()
+%typemap(in) (uint8_t *txBuf, int length) {
+ if (PyByteArray_Check($input)) {
+ // whilst this may seem 'hopeful' it turns out this is safe
+ $1 = (uint8_t*) PyByteArray_AsString($input);
+ $2 = PyByteArray_Size($input);
+ }
+}
+
+namespace mraa {
+class I2c;
%typemap(out) uint8_t*
{
// need to loop over length
$result = PyByteArray_FromStringAndSize((char*) $1, arg2);
}
+class Spi;
+%typemap(out) uint8_t*
+{
+ // need to loop over length
+ $result = PyByteArray_FromStringAndSize((char*) $1, arg3);
+}
+}
+
%newobject I2c::read(uint8_t *data, int length);
+%newobject Spi::write(uint8_t *data, int length);
+%newobject Spi::transfer(uint8_t *txBuf, uint8_t *rxBuf, int length);
+
+// I2c::read()
%typemap(in) (uint8_t *data, int length) {
if (!PyInt_Check($input)) {
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
projects / contrib / mraa.git / commitdiff