Merge branch 'esp8266' of https://github.com/esp8266/Arduino into esp8266

libraries/ESP8266WebServer/examples/SDWebServer/SDWebServer.ino

@@ -55,7 +55,6 @@ void returnOK(){
   message += "Access-Control-Allow-Origin: *\r\n";
   message += "\r\n";
   client.print(message);
-  message = 0;
   client.stop();
 }
 
@@ -69,7 +68,6 @@ void returnFail(String msg){
   message += msg;
   message += "\r\n";
   client.print(message);
-  message = 0;
   client.stop();
 }
 
@@ -108,8 +106,8 @@ bool loadFromSdCard(String path){
     head += "\r\nAccess-Control-Allow-Origin: *";
     head += "\r\n\r\n";
     client.print(head);
-    dataType = 0;
-    path = 0;
+    dataType = String();
+    path = String();
     
     uint8_t obuf[WWW_BUF_SIZE];
     
@@ -172,11 +170,11 @@ void deleteRecursive(String path){
       entry.close();
       SD.remove((char *)entryPath.c_str());
     }
-    entryPath = 0;
+    entryPath = String();
     yield();
   }
   SD.rmdir((char *)path.c_str());
-  path = 0;
+  path = String();
   file.close();
 }
 
@@ -186,7 +184,7 @@ void handleDelete(){
   if(path == "/" || !SD.exists((char *)path.c_str())) return returnFail("BAD PATH");
   deleteRecursive(path);
   returnOK();
-  path = 0;
+  path = String();
 }
 
 void handleCreate(){
@@ -203,7 +201,7 @@ void handleCreate(){
     SD.mkdir((char *)path.c_str());
   }
   returnOK();
-  path = 0;
+  path = String();
 }
 
 void printDirectory() {
@@ -211,7 +209,7 @@ void printDirectory() {
   String path = server.arg("dir");
   if(path != "/" && !SD.exists((char *)path.c_str())) return returnFail("BAD PATH");
   File dir = SD.open((char *)path.c_str());
-  path = 0;
+  path = String();
   if(!dir.isDirectory()){
     dir.close();
     return returnFail("NOT DIR");
@@ -242,7 +240,7 @@ void printDirectory() {
  output += "]";
  client.write(output.c_str(), output.length());
  client.stop();
- output = 0;
+ output = String();
 }
 
 void handleNotFound(){

libraries/SPI/SPI.cpp

@@ -308,6 +308,13 @@ void SPIClass::write32(uint32_t data, bool msb) {
     while(SPI1CMD & SPIBUSY) {}
 }
 
+/**
+ * Note:
+ *  data need to be aligned to 32Bit
+ *  or you get an Fatal exception (9)
+ * @param data uint8_t *
+ * @param size uint32_t
+ */
 void SPIClass::writeBytes(uint8_t * data, uint32_t size) {
     while(size) {
         if(size > 64) {
@@ -340,6 +347,15 @@ void SPIClass::writeBytes_(uint8_t * data, uint8_t size) {
     while(SPI1CMD & SPIBUSY) {}
 }
 
+
+/**
+ * Note:
+ *  data need to be aligned to 32Bit
+ *  or you get an Fatal exception (9)
+ * @param data uint8_t *
+ * @param size uint8_t  max for size is 64Byte
+ * @param repeat uint32_t
+ */
 void SPIClass::writePattern(uint8_t * data, uint8_t size, uint32_t repeat) {
     if(size > 64) return; //max Hardware FIFO
 
@@ -376,6 +392,14 @@ void SPIClass::writePattern_(uint8_t * data, uint8_t size, uint8_t repeat) {
     writeBytes(&buffer[0], bytes);
 }
 
+/**
+ * Note:
+ *  in and out need to be aligned to 32Bit
+ *  or you get an Fatal exception (9)
+ * @param out uint8_t *
+ * @param in  uint8_t *
+ * @param size uint32_t
+ */
 void SPIClass::transferBytes(uint8_t * out, uint8_t * in, uint32_t size) {
     while(size) {
         if(size > 64) {