TCA9548A : initial implementation

merged with #413 from maleek

Signed-off-by: g-vidal <gerard.vidal@ens-lyon.fr>
Signed-off-by: Keelan Lightfoot <keelanlightfoot@gmail.com>
Signed-off-by: Jon Trulson <jtrulson@ics.com>

examples/c++/tca9548a.cxx

@@ -0,0 +1,103 @@
+/*
+ * Author: Gerard Vidal <gerard.vidal@ens-lyon.fr>
+ * 2017 IFE ENS de Lyon
+ *
+ *
+ * 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.
+ */
+
+#include <unistd.h>
+#include <iostream>
+#include <sstream>
+#include <signal.h>
+#include <stdio.h>
+#include <string.h>
+#include "tca9548a.hpp"
+
+using namespace std;
+using namespace upm;
+
+/*
+ * This examble is built to multiplex channel 2 and Channel 4
+ *
+ */
+
+void
+showAllPorts(upm::TCA9548A *multiplex) {
+    int i;
+    char  ports [80];
+    std::string convert;
+    for (i = 0; i<8; i++) {
+        if (multiplex->getPort(i))
+            strcat (ports, "1." );
+        else
+            strcat (ports,"0.");
+    }
+    cout << "Ports: " << ports;
+}
+
+int main(int argc, char **argv)
+{
+
+    // Instantiate a TCA9548A instance of i2c multiplexer
+    upm::TCA9548A *multiplex = new upm::TCA9548A(0);
+
+    //Clean
+    multiplex->disableAllPorts();
+    cout << "All ports disabled.";
+
+    // Open i2c bus on multiplexer channel 4
+    multiplex->setPort(4,multiplex->ENABLED,multiplex->EXCLUSIVE);
+    cout << "Port 4 enabled with exclusive access.";
+    showAllPorts(multiplex);
+
+    // Close com with channel 4
+    multiplex->disableAllPorts();
+
+    // Open i2c bus on multiplexer channel 2
+    multiplex->setPort(2,multiplex->ENABLED,multiplex->EXCLUSIVE);
+    cout << "Port 2 enabled with exclusive access.";
+    showAllPorts(multiplex);
+
+    //close com with channel 2
+    multiplex->disableAllPorts();
+
+    // Open 2 i2c bus on multiplexer channel 4 and channel2
+    multiplex->setPort(4,multiplex->ENABLED,multiplex->EXCLUSIVE);
+    multiplex->setPort(2,multiplex->ENABLED,multiplex->INCLUSIVE);
+    cout << "Port 4 enabled with exclusive access.";
+    cout << "Port 2 enabled with exclusive access.";
+    showAllPorts(multiplex);
+
+    //close com with all channels
+    multiplex->disableAllPorts();
+
+    // Open i2c bus on all multiplexer channels
+    multiplex->enableAllPorts();
+    cout << "All ports enabled.";
+    showAllPorts(multiplex);
+
+    //close com with all channels
+    multiplex->disableAllPorts();
+
+    delete multiplex;
+
+    return 0;
+}