Correct typos in comments and documentation

Author: per1234

cores/arduino/HardwareSerial.cpp

@@ -219,7 +219,7 @@ void HardwareSerial::flush()
 	  _tx_udr_empty_irq();
   }
   // If we get here, nothing is queued anymore (DRIE is disabled) and
-  // the hardware finished tranmission (TXC is set).
+  // the hardware finished transmission (TXC is set).
 }
 
 size_t HardwareSerial::write(uint8_t c)

cores/arduino/HardwareSerial.h

@@ -32,7 +32,7 @@
 // using a ring buffer (I think), in which head is the index of the location
 // to which to write the next incoming character and tail is the index of the
 // location from which to read.
-// NOTE: a "power of 2" buffer size is reccomended to dramatically
+// NOTE: a "power of 2" buffer size is recommended to dramatically
 //       optimize all the modulo operations for ring buffers.
 // WARNING: When buffer sizes are increased to > 256, the buffer index
 // variables are automatically increased in size, but the extra

cores/arduino/HardwareSerial_private.h

@@ -63,7 +63,7 @@
 #endif
 #endif // !defined TXC0
 
-// Check at compiletime that it is really ok to use the bit positions of
+// Check at compile time that it is really ok to use the bit positions of
 // UART0 for the other UARTs as well, in case these values ever get
 // changed for future hardware.
 #if defined(TXC1) && (TXC1 != TXC0 || RXEN1 != RXEN0 || RXCIE1 != RXCIE0 || \

cores/arduino/Print.h

@@ -59,7 +59,7 @@ class Print
     }
 
     // default to zero, meaning "a single write may block"
-    // should be overriden by subclasses with buffering
+    // should be overridden by subclasses with buffering
     virtual int availableForWrite() { return 0; }
 
     size_t print(const __FlashStringHelper *);

cores/arduino/Stream.h

@@ -25,7 +25,7 @@
 #include <inttypes.h>
 #include "Print.h"
 
-// compatability macros for testing
+// compatibility macros for testing
 /*
 #define   getInt()            parseInt()
 #define   getInt(ignore)    parseInt(ignore)

cores/arduino/USBAPI.h

@@ -32,7 +32,7 @@ typedef unsigned long u32;
 
 #include "Arduino.h"
 
-// This definitions is usefull if you want to reduce the EP_SIZE to 16
+// This definitions is useful if you want to reduce the EP_SIZE to 16
 // at the moment only 64 and 16 as EP_SIZE for all EPs are supported except the control endpoint
 #ifndef USB_EP_SIZE
 #define USB_EP_SIZE 64

cores/arduino/WString.h

@@ -95,7 +95,7 @@ class String
 
 	// returns true on success, false on failure (in which case, the string
 	// is left unchanged).  if the argument is null or invalid, the
-	// concatenation is considered unsucessful.
+	// concatenation is considered unsuccessful.
 	unsigned char concat(const String &str);
 	unsigned char concat(const char *cstr);
 	unsigned char concat(char c);
@@ -152,7 +152,7 @@ class String
 	unsigned char startsWith(const String &prefix, unsigned int offset) const;
 	unsigned char endsWith(const String &suffix) const;
 
-	// character acccess
+	// character access
 	char charAt(unsigned int index) const;
 	void setCharAt(unsigned int index, char c);
 	char operator [] (unsigned int index) const;

cores/arduino/new.cpp

@@ -18,7 +18,7 @@
 
 #include "new.h"
 
-// The C++ spec dicates that allocation failure should cause the
+// The C++ spec dictates that allocation failure should cause the
 // (non-nothrow version of the) operator new to throw an exception.
 // Since we expect to have exceptions disabled, it would be more
 // appropriate (and probably standards-compliant) to terminate instead.

cores/arduino/wiring.c

@@ -125,7 +125,7 @@ void delayMicroseconds(unsigned int us)
 	// 2 microseconds) gives delays longer than desired.
 	//delay_us(us);
 #if F_CPU >= 24000000L
-	// for the 24 MHz clock for the aventurous ones, trying to overclock
+	// for the 24 MHz clock for the adventurous ones trying to overclock
 
 	// zero delay fix
 	if (!us) return; //  = 3 cycles, (4 when true)
@@ -135,9 +135,9 @@ void delayMicroseconds(unsigned int us)
 	// delay requested.
 	us *= 6; // x6 us, = 7 cycles
 
-	// account for the time taken in the preceeding commands.
+	// account for the time taken in the preceding commands.
 	// we just burned 22 (24) cycles above, remove 5, (5*4=20)
-	// us is at least 6 so we can substract 5
+	// us is at least 6 so we can subtract 5
 	us -= 5; //=2 cycles
 
 #elif F_CPU >= 20000000L
@@ -157,9 +157,9 @@ void delayMicroseconds(unsigned int us)
 	// delay requested.
 	us = (us << 2) + us; // x5 us, = 7 cycles
 
-	// account for the time taken in the preceeding commands.
+	// account for the time taken in the preceding commands.
 	// we just burned 26 (28) cycles above, remove 7, (7*4=28)
-	// us is at least 10 so we can substract 7
+	// us is at least 10 so we can subtract 7
 	us -= 7; // 2 cycles
 
 #elif F_CPU >= 16000000L
@@ -174,9 +174,9 @@ void delayMicroseconds(unsigned int us)
 	// delay requested.
 	us <<= 2; // x4 us, = 4 cycles
 
-	// account for the time taken in the preceeding commands.
+	// account for the time taken in the preceding commands.
 	// we just burned 19 (21) cycles above, remove 5, (5*4=20)
-	// us is at least 8 so we can substract 5
+	// us is at least 8 so we can subtract 5
 	us -= 5; // = 2 cycles,
 
 #elif F_CPU >= 12000000L
@@ -191,9 +191,9 @@ void delayMicroseconds(unsigned int us)
 	// delay requested.
 	us = (us << 1) + us; // x3 us, = 5 cycles
 
-	// account for the time taken in the preceeding commands.
+	// account for the time taken in the preceding commands.
 	// we just burned 20 (22) cycles above, remove 5, (5*4=20)
-	// us is at least 6 so we can substract 5
+	// us is at least 6 so we can subtract 5
 	us -= 5; //2 cycles
 
 #elif F_CPU >= 8000000L
@@ -208,19 +208,19 @@ void delayMicroseconds(unsigned int us)
 	// delay requested.
 	us <<= 1; //x2 us, = 2 cycles
 
-	// account for the time taken in the preceeding commands.
+	// account for the time taken in the preceding commands.
 	// we just burned 17 (19) cycles above, remove 4, (4*4=16)
-	// us is at least 6 so we can substract 4
+	// us is at least 6 so we can subtract 4
 	us -= 4; // = 2 cycles
 
 #else
 	// for the 1 MHz internal clock (default settings for common Atmega microcontrollers)
 
 	// the overhead of the function calls is 14 (16) cycles
 	if (us <= 16) return; //= 3 cycles, (4 when true)
-	if (us <= 25) return; //= 3 cycles, (4 when true), (must be at least 25 if we want to substract 22)
+	if (us <= 25) return; //= 3 cycles, (4 when true), (must be at least 25 if we want to subtract 22)
 
-	// compensate for the time taken by the preceeding and next commands (about 22 cycles)
+	// compensate for the time taken by the preceding and next commands (about 22 cycles)
 	us -= 22; // = 2 cycles
 	// the following loop takes 4 microseconds (4 cycles)
 	// per iteration, so execute it us/4 times

cores/arduino/wiring_digital.c

@@ -67,7 +67,7 @@ void pinMode(uint8_t pin, uint8_t mode)
 //
 // Mark Sproul:
 // - Removed inline. Save 170 bytes on atmega1280
-// - changed to a switch statment; added 32 bytes but much easier to read and maintain.
+// - changed to a switch statement; added 32 bytes but much easier to read and maintain.
 // - Added more #ifdefs, now compiles for atmega645
 //
 //static inline void turnOffPWM(uint8_t timer) __attribute__ ((always_inline));