Diff: SD.cpp

Revision:

12:a89096944f20

Parent:

9:fe2c9b3a312b

--- a/SD.cpp	Mon Nov 16 23:29:15 2015 +0000
+++ b/SD.cpp	Sun Jan 31 01:02:36 2016 +0000
@@ -9,7 +9,7 @@
         mySD(const char* name):FATFileSystem(name)
         {
             uint8_t result=BSP_SD_Init();
-            DPrintf("BSP_SD_Init: %u.\r\n",result);
+            DPrintf_("BSP_SD_Init: %u.\r\n",result);
             BSP_SD_GetCardInfo(&CardInfo);
             DPrintf("BSP_SD_GetCardInfo: 0x%llX bytes / %u sector size.\r\n",CardInfo.CardCapacity,CardInfo.CardBlockSize);
         };
@@ -33,7 +33,6 @@
 };
 
 mySD                        sd("sd");
-bool                        mustSrand=true;
 FileHandle                  *fileHandle;
 uint8_t                     buffer[6000];
 int16_t                     offsetX;
@@ -104,13 +103,6 @@
     BYTE                    scale;
     JPG_UINT                pictureWidth;
     JPG_UINT                pictureHeight;
-    AnalogIn                analogIn(PA_0);
-
-    if (mustSrand==true)
-    {
-        srand(time(NULL)+analogIn.read_u16());
-        mustSrand=false;
-    }
 
     //
     // count all jpegs
@@ -134,8 +126,8 @@
     //
     // get random number
     //
-    count=(uint32_t)((uint64_t)rand()*(uint64_t)count/RAND_MAX);
-    DPrintf("SD_ShowRandomPicture: Take %u.\r\n",count);
+    count=(uint32_t)((uint64_t)TM_RNG_Get()*(uint64_t)count/0xFFFFFFFF);
+    DPrintf_("SD_ShowRandomPicture: Take %u.\r\n",count);
 
     //
     // find random jpeg
@@ -144,7 +136,6 @@
     dir=opendir("/sd/");
     while ((dirEnt=readdir(dir))!=NULL)
     {
-DPrintf("check %s.\r\n",dirEnt->d_name);
         extension=strrchr(dirEnt->d_name,'.');
         if ((extension==NULL) || (strcmp(extension,".jpg"))!=0)
             continue;        
@@ -158,7 +149,6 @@
         count--;
     }
     closedir(dir);
-DPrintf("got %s.\r\n",file);
     
     if (file[0]=='\0')
         return false;
@@ -166,7 +156,7 @@
     //
     // load random jpeg
     //
-    DPrintf("SD_ShowRandomPicture: Open %s.\r\n",file);
+    DPrintf_("SD_ShowRandomPicture: Open %s.\r\n",file);
     if ((fileHandle=sd.open(file,O_RDONLY))==NULL)
         return false;
 
@@ -178,6 +168,9 @@
         pictureWidth=jdec.width;
         pictureHeight=jdec.height;
         scale=0;
+
+        DPrintf("SD_ShowRandomPicture: Picture %ux%u, LCD: %ux%u.\r\n",pictureWidth,pictureHeight,uiLcd.GetXSize(),uiLcd.GetYSize());
+
         while ((pictureWidth>uiLcd.GetXSize()) || (pictureHeight>uiLcd.GetYSize()))
         {
             pictureWidth/=2;
@@ -190,17 +183,18 @@
         offsetX=(uiLcd.GetXSize()-pictureWidth)/2;
         offsetY=(uiLcd.GetYSize()-pictureHeight)/2;
 
+        DPrintf("SD_ShowRandomPicture: Scale %u.\r\n",scale);
+
         jResult=jd_decomp(&jdec,jpeg_output_func,scale);
         if (jResult==JDR_OK)
             result=true;
         else
-            DPrintf("SD_ShowRandomPicture: jd_decomp: %u\r\n",jResult);
+            DPrintf("SD_ShowRandomPicture: jd_decomp: %u on %s\r\n",jResult,file);
     }
     else
-        DPrintf("SD_ShowRandomPicture: jd_prepare %u\r\n",jResult);
+        DPrintf("SD_ShowRandomPicture: jd_prepare %u on %s\r\n",jResult,file);
 
     fileHandle->close();
 
     return result;
 }
-    
\ No newline at end of file