cjq4435: C port, C++ wraps C

Signed-off-by: Jon Trulson <jtrulson@ics.com>

examples/c++/cjq4435.cxx

@@ -33,45 +33,45 @@ int shouldRun = true;
 
 void sig_handler(int signo)
 {
-  if (signo == SIGINT)
-    shouldRun = false;
+    if (signo == SIGINT)
+        shouldRun = false;
 }
 
 
 int main ()
 {
-  signal(SIGINT, sig_handler);
+    signal(SIGINT, sig_handler);
 
 //! [Interesting]
-  // Instantiate a CJQ4435 MOSFET on a PWM capable digital pin D3
-  upm::CJQ4435* mosfet = new upm::CJQ4435(3);
-  
-  mosfet->setPeriodMS(10);
-  mosfet->enable(true);
+    // Instantiate a CJQ4435 MOSFET on a PWM capable digital pin D3
+    upm::CJQ4435* mosfet = new upm::CJQ4435(3);
 
-  while (shouldRun)
+    mosfet->setPeriodMS(10);
+    mosfet->enable(true);
+
+    while (shouldRun)
     {
-      // start with a duty cycle of 0.0 (off) and increment to 1.0 (on)
-      for (float i=0.0; i <= 1.0; i+=0.1)
+        // start with a duty cycle of 0.0 (off) and increment to 1.0 (on)
+        for (float i=0.0; i <= 1.0; i+=0.1)
         {
-          mosfet->setDutyCycle(i);
-          usleep(100000);
+            mosfet->setDutyCycle(i);
+            usleep(100000);
         }
-      sleep(1);
-      // Now take it back down
-      // start with a duty cycle of 1.0 (on) and decrement to 0.0 (off)
-      for (float i=1.0; i >= 0.0; i-=0.1)
+        sleep(1);
+        // Now take it back down
+        // start with a duty cycle of 1.0 (on) and decrement to 0.0 (off)
+        for (float i=1.0; i >= 0.0; i-=0.1)
         {
-          mosfet->setDutyCycle(i);
-          usleep(100000);
+            mosfet->setDutyCycle(i);
+            usleep(100000);
         }
-      sleep(1);
+        sleep(1);
     }
 
 //! [Interesting]
 
-  cout << "Exiting..." << endl;
+    cout << "Exiting..." << endl;
 
-  delete mosfet;
-  return 0;
+    delete mosfet;
+    return 0;
 }

examples/c/CMakeLists.txt

@@ -144,6 +144,7 @@ add_example (mb704x)
 add_example (mcp2515)
 add_example (max30100)
 add_example (speaker)
+add_example (cjq4435)
 
 # Custom examples
 add_custom_example (nmea_gps_i2c-example-c nmea_gps_i2c.c nmea_gps)

examples/c/cjq4435.c

@@ -0,0 +1,82 @@
+/*
+ * Author: Jon Trulson <jtrulson@ics.com>
+ * Copyright (c) 2017 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.
+ */
+
+#include <unistd.h>
+#include <signal.h>
+
+#include <upm_utilities.h>
+#include "cjq4435.h"
+
+int shouldRun = true;
+
+void sig_handler(int signo)
+{
+    if (signo == SIGINT)
+        shouldRun = false;
+}
+
+
+int main ()
+{
+    signal(SIGINT, sig_handler);
+
+//! [Interesting]
+    // Instantiate a CJQ4435 MOSFET on a PWM capable digital pin D3
+    cjq4435_context mosfet = cjq4435_init(3);
+
+    if (!mosfet)
+    {
+        printf("cjq4435_init() failed.\n");
+        return 1;
+    }
+
+    cjq4435_set_period_ms(mosfet, 10);
+    cjq4435_enable(mosfet, true);
+
+    while (shouldRun)
+    {
+        // start with a duty cycle of 0.0 (off) and increment to 1.0 (on)
+        for (float i=0.0; i <= 1.0; i+=0.1)
+        {
+            cjq4435_set_duty_cycle(mosfet, i);
+            upm_delay_ms(100);
+        }
+        upm_delay(1);
+
+        // Now bring it back down
+        // start with a duty cycle of 1.0 (on) and decrement to 0.0 (off)
+        for (float i=1.0; i >= 0.0; i-=0.1)
+        {
+            cjq4435_set_duty_cycle(mosfet, i);
+            upm_delay_ms(100);
+        }
+        upm_delay(1);
+    }
+
+    printf("Exiting...\n");
+
+    cjq4435_close(mosfet);
+//! [Interesting]
+    return 0;
+}