lpd8806: Added new module - digital led strip (NOT TESTED)

Signed-off-by: Kiveisha Yevgeniy <yevgeniy.kiveisha@intel.com>

examples/CMakeLists.txt

@@ -26,6 +26,7 @@ add_executable (max31723-example max31723.cxx)
 add_executable (max5487-example max5487.cxx)
 add_executable (nrf8001-broadcast-example nrf8001_broadcast.cxx)
 add_executable (nrf8001-helloworld-example nrf8001_helloworld.cxx)
+add_executable (lpd8806-example lpd8806-example.cxx)
 
 include_directories (${PROJECT_SOURCE_DIR}/src/hmc5883l)
 include_directories (${PROJECT_SOURCE_DIR}/src/grove)
@@ -49,6 +50,7 @@ include_directories (${PROJECT_SOURCE_DIR}/src/maxds3231m)
 include_directories (${PROJECT_SOURCE_DIR}/src/max31723)
 include_directories (${PROJECT_SOURCE_DIR}/src/max5487)
 include_directories (${PROJECT_SOURCE_DIR}/src/nrf8001)
+include_directories (${PROJECT_SOURCE_DIR}/src/lpd8806)
 
 target_link_libraries (compass hmc5883l ${CMAKE_THREAD_LIBS_INIT})
 target_link_libraries (groveled grove ${CMAKE_THREAD_LIBS_INIT})
@@ -78,3 +80,4 @@ target_link_libraries (max31723-example max31723 ${CMAKE_THREAD_LIBS_INIT})
 target_link_libraries (max5487-example max5487 ${CMAKE_THREAD_LIBS_INIT})
 target_link_libraries (nrf8001-broadcast-example nrf8001 ${CMAKE_THREAD_LIBS_INIT})
 target_link_libraries (nrf8001-helloworld-example nrf8001 ${CMAKE_THREAD_LIBS_INIT})
+target_link_libraries (lpd8806-example lpd8806 ${CMAKE_THREAD_LIBS_INIT})

examples/lpd8806-example.cxx

@@ -0,0 +1,104 @@
+/*
+ * Author: Yevgeniy Kiveisha <yevgeniy.kiveisha@intel.com>
+ * Copyright (c) 2014 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 <iostream>
+#include "lpd8806.h"
+#include <signal.h>
+
+void scanner(uint8_t r, uint8_t g, uint8_t b, uint8_t wait);
+
+int doWork = 0;
+upm::LPD8806 *sensor = NULL;
+
+void
+sig_handler(int signo)
+{
+    printf("got signal\n");
+    if (signo == SIGINT) {
+        printf("exiting application\n");
+        doWork = 1;
+    }
+}
+
+int
+main(int argc, char **argv)
+{
+    //! [Interesting]
+    sensor = new upm::LPD8806(10, 7);
+    usleep (1000000);
+
+    sensor->show ();
+
+    while (!doWork) {
+        // Back-and-forth lights
+        scanner(127, 0, 0, 30);        // red, slow
+        scanner(0, 0, 127, 15);        // blue, fast
+        usleep (1000000);
+    }
+    //! [Interesting]
+
+    std::cout << "exiting application" << std::endl;
+
+    delete sensor;
+
+    return 0;
+}
+
+void scanner(uint8_t r, uint8_t g, uint8_t b, uint8_t wait) {
+    int i, j, pos, dir;
+
+    pos = 0;
+    dir = 1;
+
+    for(i=0; i < ((sensor->getStripLength() - 1) * 8); i++) {
+        // Draw 5 pixels centered on pos.  setPixelColor() will clip
+        // any pixels off the ends of the strip, no worries there.
+        // we'll make the colors dimmer at the edges for a nice pulse
+        // look
+        sensor->setPixelColor(pos - 2, r/4, g/4, b/4);
+        sensor->setPixelColor(pos - 1, r/2, g/2, b/2);
+        sensor->setPixelColor(pos, r, g, b);
+        sensor->setPixelColor(pos + 1, r/2, g/2, b/2);
+        sensor->setPixelColor(pos + 2, r/4, g/4, b/4);
+
+        sensor->show();
+        usleep (wait * 1000);
+        // If we wanted to be sneaky we could erase just the tail end
+        // pixel, but it's much easier just to erase the whole thing
+        // and draw a new one next time.
+        for(j=-2; j<= 2; j++) {
+            sensor->setPixelColor(pos+j, 0,0,0);
+        }
+        // Bounce off ends of strip
+        pos += dir;
+        if(pos < 0) {
+            pos = 1;
+            dir = -dir;
+        } else if (pos >= sensor->getStripLength()) {
+            pos = sensor->getStripLength() - 2;
+            dir = -dir;
+        }
+    }
+}