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;
+}

examples/javascript/tca9548.js

@@ -0,0 +1,75 @@
+/*
+* Author: Keelan Lightfoot <keelanlightfoot@gmail.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.
+*/
+
+/*
+* On its own, a i2c switch doesn't really do anything, so the best I can do is
+* flips some ports on and off to demonstrate the capabilities of the library.
+*/
+
+var tca = require('jsupm_tca9548a');
+
+// Assumes default bus and address
+var sw = new tca.TCA9548A(tca.TCA9548A_I2C_BUS,
+                          tca.TCA9548A_DEFAULT_ADDR);
+
+// Start with clean slate
+sw.disableAllPorts();
+console.log("All ports disabled.");
+showAllPorts();
+
+// Enable port 4
+sw.setPort(4, tca.TCA9548A.ENABLED, tca.TCA9548A.EXCLUSIVE);
+console.log("Port 4 enabled with exclusive access.");
+showAllPorts();
+
+// Enable port 5
+sw.setPort(5, tca.TCA9548A.ENABLED, tca.TCA9548A.INCLUSIVE);
+console.log("Port 5 enabled with inclusive access.");
+showAllPorts();
+
+// Disable port 5
+sw.setPort(5, tca.TCA9548A.DISABLED, tca.TCA9548A.INCLUSIVE);
+console.log("Port 5 disabled with inclusive access.");
+showAllPorts();
+
+// Enable all ports
+sw.enableAllPorts();
+console.log("All ports enabled.");
+showAllPorts();
+
+// Clean up our mess, in an oblique way.
+sw.setPort(4, tca.TCA9548A.DISABLED, tca.TCA9548A.EXCLUSIVE);
+console.log("Port 4 disabled with exclusive access.");
+showAllPorts();
+
+// fin
+process.exit(0);
+
+function showAllPorts() {
+    var ports = "";
+    for (var i = 0; i<8; i++) {
+	ports += (sw.getPort(i)?i:".");
+    }
+    console.log("Ports: "+ports);
+}