Diff: SlideShow/AppSlideShow.cpp

Revision:

5:f4de114c31c3

Child:

11:265884fa7fdd

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SlideShow/AppSlideShow.cpp	Sun Dec 21 13:53:07 2014 +0100
@@ -0,0 +1,118 @@
+/*
+ *  Copyright 2014 Embedded Artists AB
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+
+#include "mbed.h"
+#include "AppSlideShow.h"
+
+/******************************************************************************
+ * Defines and typedefs
+ *****************************************************************************/
+
+#define TICKER_RESOLUTION_IN_MS  10
+
+/******************************************************************************
+ * Global variables
+ *****************************************************************************/
+
+volatile uint32_t msTicks = 0;
+
+/******************************************************************************
+ * Private functions
+ *****************************************************************************/
+
+static void tRender(void const *args)
+{
+  Renderer* s = (Renderer*)args;
+  s->render();
+}
+
+static void ticker(void const *n) {
+  msTicks += TICKER_RESOLUTION_IN_MS;
+}
+
+/******************************************************************************
+ * Public functions
+ *****************************************************************************/
+
+AppSlideShow::AppSlideShow() : _fb(NULL), _disp(NULL), _show(NULL), _rend(NULL), _fileMutex()
+{
+}
+
+AppSlideShow::~AppSlideShow()
+{
+    teardown();
+}
+
+bool AppSlideShow::setup()
+{
+    SlideShow::SlideShowError err;
+    
+    _disp = DMBoard::instance().display();
+    
+    _fb = _disp->allocateFramebuffer();
+    if (_fb == NULL) {
+        err = SlideShow::OutOfMemory;
+    } else {
+        memset(_fb, 0xff, _disp->fbSize());
+        _rend = new Renderer();
+        _show = new SlideShow(_rend, "/mci/elec14", NULL, 150, 95, 1, &_fileMutex);
+        err = _show->prepare("/mci/elec14/ea_logo.txt");
+    }
+
+    return (err == SlideShow::Ok);
+}
+
+void AppSlideShow::runToCompletion()
+{
+    // Save existing frame buffer
+    void* oldFB = _disp->swapFramebuffer(_fb);
+    
+    // Alternative 1: use the calling thread's context to run in
+    Thread tr(tRender, _rend, osPriorityHigh);
+    _rend->setRenderThread(&tr);
+    
+    // Generate the millisecond ticks for the slideshow
+    RtosTimer rtosTimer(ticker, osTimerPeriodic);
+    rtosTimer.start(TICKER_RESOLUTION_IN_MS);    
+
+    // Wait for slideshow to complete
+    _show->run();
+    
+    tr.terminate();
+    
+    // Restore the original FB
+    _disp->swapFramebuffer(oldFB);
+}
+
+bool AppSlideShow::teardown()
+{
+    if (_show != NULL) {
+        free(_show);
+        _show = NULL;
+    }
+    if (_rend != NULL) {
+        free(_rend);
+        _rend = NULL;
+    }
+    if (_fb != NULL) {
+        free(_fb);
+        _fb = NULL;
+    }
+    return true;
+}
+
+