Diff: main.cpp

Revision:

0:1855a008f28e

Child:

1:1637e625b21b

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu Aug 16 15:49:19 2012 +0000
@@ -0,0 +1,138 @@
+#include "mbed.h"
+#include "MSCFileSystem.h"
+#include "EthernetInterface.h"
+#include "HTTPClient.h"
+#include "HTTPFile.h"
+#include "BlinkLed.h"
+#include "tinyxml2.h"
+
+using namespace tinyxml2;
+
+int GetFile(const char *path, const char *url);
+
+EthernetInterface eth;
+HTTPClient http;
+MSCFileSystem usb("usb");
+BlinkLed led1(LED1, 4);
+DigitalOut fsusb30s(p9);
+Timer timer;
+
+const char* rssUrl = "http://www3.nhk.or.jp/rj/podcast/rss/english.xml";
+const char* rssPath = "/usb/english.xml";
+const char* mp3Path = "/usb/english.mp3";
+
+int main()
+{
+    printf("\n\n================================\n");
+    printf("mpod NHK English news Downloader\n");
+    printf("================================\n\n");
+    
+    // FSUSB30 switches to HSD1 (mbed)
+    printf("USB host was switched to HSD1.\n");
+    fsusb30s = 0;
+    
+    // Network setup
+    printf("Setup EtherNet with DHCP.\n");
+    eth.init(); //Use DHCP
+    eth.connect();
+    
+    
+    // Obtain lastBuildDate
+    const char* lastBuildDateOriginal;
+    XMLDocument docOriginal;
+    if(XML_SUCCESS != docOriginal.LoadFile(rssPath))
+    {
+        lastBuildDateOriginal = "No english.xml in USB memory";
+    }
+    XMLElement* lastBuildDateOriginalElement = docOriginal.FirstChildElement("rss")->FirstChildElement("channel")->FirstChildElement("lastBuildDate");
+    if(NULL == lastBuildDateOriginalElement)
+    {
+        lastBuildDateOriginal = "No \"lastBuildDate\" element in RSS";
+    }
+    else
+    {
+        lastBuildDateOriginal = lastBuildDateOriginalElement->GetText();
+    }
+    printf("lastBuildDate (original): %s\n", lastBuildDateOriginal);
+    
+    
+    // RSS download and parse
+    GetFile(rssPath, rssUrl);
+    const char* lastBuildDateCurrent;
+    XMLDocument docCurrent;
+    if(XML_SUCCESS != docCurrent.LoadFile(rssPath))
+    {
+        lastBuildDateCurrent = "No english.xml in USB memory";
+    }
+    XMLElement* lastBuildDateCurrentElement = docCurrent.FirstChildElement("rss")->FirstChildElement("channel")->FirstChildElement("lastBuildDate");
+    if(NULL == lastBuildDateCurrentElement)
+    {
+        lastBuildDateCurrent = "No \"lastBuildDate\" element in RSS";
+    }
+    else
+    {
+        lastBuildDateCurrent = lastBuildDateCurrentElement->GetText();
+    }
+    printf("lastBuildDate (Current) : %s\n", lastBuildDateCurrent);
+    
+    
+    if (strcmp(lastBuildDateOriginal, lastBuildDateCurrent) == 0)
+    {
+        printf("lastBuildDate (original) == lastBuildDate (current)\n");
+        FILE* mp3fp = fopen(mp3Path, "r"); // check an existance of english.mp3
+        if (mp3fp != NULL)
+        {
+            fclose(mp3fp);
+        }
+        else
+        {
+            printf("However, no enlish.mp3 in USB memory\n");
+        }
+    }
+    else
+    {
+        const char* mp3Url;
+        XMLElement* enclosureElement = docCurrent.FirstChildElement("rss")->FirstChildElement("channel")->FirstChildElement("item")->FirstChildElement("enclosure");
+        if(NULL == enclosureElement)
+        {
+            while(1){};
+        }
+        else
+        {
+            mp3Url = enclosureElement->Attribute( "url" );
+        }
+        printf("mp3Url : %s\n", mp3Url);
+        GetFile(mp3Path, mp3Url);
+    }
+    
+    
+    // Switch USB host from mbed to KWD
+    printf("USB host was switched to HSD2.\n");
+    fsusb30s = 1; // HSD2 (KWD)
+
+    // blink LED
+    led1.startBlink();
+    
+    while(true){}
+}
+
+int GetFile(const char *path, const char *url)
+{
+    HTTPFile file(path);
+    printf("Getting %s\n", url);
+    
+    timer.stop();
+    timer.reset();
+    timer.start();
+    
+    HTTPResult retGet = http.get(url, &file);
+    if (retGet != HTTP_OK) {
+        error("Error in http.get in GetFile(): %d\n", retGet);
+    }
+    file.clear();
+    
+    timer.stop();
+    printf("timer.read_ms(): %d\n", timer.read_ms());
+
+    return (0);
+}