Add code-spell spelling checks to CI (#8067)

Help find and fix silly spelling errors as they are added to the repo.

cores/esp8266/CallBackList.h

@@ -1,9 +1,8 @@
 #ifndef __CALLBACKLIST_H__
 #define __CALLBACKLIST_H__
 
-
 /*
- CallBackList, An implemention for handling callback execution
+ CallBackList, An implementation for handling callback execution
 
  Copyright (c) 2019 Herman Reintke. All rights reserved.
  This file is part of the esp8266 core for Arduino environment.

cores/esp8266/Esp-frag.cpp

@@ -25,7 +25,7 @@
 
 void EspClass::getHeapStats(uint32_t* hfree, uint16_t* hmax, uint8_t* hfrag)
 {
-    // L2 / Euclidian norm of free block sizes.
+    // L2 / Euclidean norm of free block sizes.
     // Having getFreeHeap()=sum(hole-size), fragmentation is given by
     // 100 * (1 - sqrt(sum(hole-size²)) / sum(hole-size))
 

cores/esp8266/Esp.h

@@ -26,7 +26,7 @@
 #include "spi_vendors.h"
 
 /**
- * AVR macros for WDT managment
+ * AVR macros for WDT management
  */
 typedef enum {
     WDTO_0MS    = 0,   //!< WDTO_0MS
@@ -264,7 +264,7 @@ class EspClass {
         static bool flashReplaceBlock(uint32_t address, const uint8_t *value, uint32_t byteCount);
         /**
          * @brief Write up to @a size bytes from @a data to flash at @a address
-         * This function takes case of unaligned memory acces by copying @a data to a temporary buffer,
+         * This function takes case of unaligned memory access by copying @a data to a temporary buffer,
          * it also takes care of page boundary crossing see @a flashWritePageBreak as to why it's done.
          * Less than @a size bytes may be written, due to 4 byte alignment requirement of spi_flash_write
          * @param address address on flash where write should start

cores/esp8266/FSnoop.cpp

@@ -15,7 +15,7 @@ void close_all_fs(void)
 }
 
 // default weak definitions
-// they are overriden in their respective real implementation
+// they are overridden in their respective real implementation
 // hint: https://github.com/esp8266/Arduino/pull/6699#issuecomment-549085382
 
 void littlefs_request_end(void) __attribute__((weak));

cores/esp8266/HardwareSerial.h

@@ -132,7 +132,7 @@ public:
 
     int peek(void) override
     {
-        // return -1 when data is unvailable (arduino api)
+        // return -1 when data is unavailable (arduino api)
         return uart_peek_char(_uart);
     }
 
@@ -162,7 +162,7 @@ public:
 
     int read(void) override
     {
-        // return -1 when data is unvailable (arduino api)
+        // return -1 when data is unavailable (arduino api)
         return uart_read_char(_uart);
     }
     // ::read(buffer, size): same as readBytes without timeout

cores/esp8266/LwipDhcpServer-NonOS.cpp

@@ -51,7 +51,7 @@ extern "C"
         //                  trying to change legacy behavor
         // `fw_has_started_softap_dhcps` will be read in DhcpServer::DhcpServer
         // which is called when c++ ctors are initialized, specifically
-        // dhcpSoftAP intialized with AP interface number above.
+        // dhcpSoftAP initialized with AP interface number above.
         fw_has_started_softap_dhcps = 1;
 #endif
     }

cores/esp8266/LwipDhcpServer.cpp

@@ -195,7 +195,7 @@ DhcpServer::DhcpServer(netif* netif): _netif(netif)
             { 0 }           // gateway 0.0.0.0
         };
         begin(&ip);
-        fw_has_started_softap_dhcps = 2; // not 1, ending intial boot sequence
+        fw_has_started_softap_dhcps = 2; // not 1, ending initial boot sequence
     }
 };
 
@@ -454,10 +454,10 @@ uint8_t* DhcpServer::add_offer_options(uint8_t *optptr)
     *optptr++ = 1;
     *optptr++ = 0x00;
 
-#if 0 // vendor specific unititialized (??)
+#if 0 // vendor specific uninitialized (??)
     *optptr++ = 43; // vendor specific
     *optptr++ = 6;
-    // unitialized ?
+    // uninitialized ?
 #endif
 
 #if 0 // already set (DHCP_OPTION_SUBNET_MASK==1) (??)

cores/esp8266/Print.h

@@ -76,7 +76,7 @@ class Print {
         inline size_t write(int8_t c) { return write((uint8_t) c); }
 
         // 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 printf(const char * format, ...)  __attribute__ ((format (printf, 2, 3)));

cores/esp8266/Stream.cpp

@@ -148,7 +148,7 @@ long Stream::parseInt(char skipChar) {
 
     do {
         if(c == skipChar)
-            ; // ignore this charactor
+            ; // ignore this character
         else if(c == '-')
             isNegative = true;
         else if(c >= '0' && c <= '9')        // is c a digit?

cores/esp8266/Stream.h

@@ -162,27 +162,27 @@ class Stream: public Print {
         // ::send*() methods:
         // - always stop before timeout when "no-more-input-possible-data"
         //   or "no-more-output-possible-data" condition is met
-        // - always return number of transfered bytes
+        // - always return number of transferred bytes
         // When result is 0 or less than requested maxLen, Print::getLastSend()
         // contains an error reason.
 
         // transfers already buffered / immediately available data (no timeout)
-        // returns number of transfered bytes
+        // returns number of transferred bytes
         size_t sendAvailable (Print* to) { return sendGeneric(to, -1, -1, oneShotMs::alwaysExpired); }
         size_t sendAvailable (Print& to) { return sendAvailable(&to); }
 
         // transfers data until timeout
-        // returns number of transfered bytes
+        // returns number of transferred bytes
         size_t sendAll (Print* to, const oneShotMs::timeType timeoutMs = oneShotMs::neverExpires) { return sendGeneric(to, -1, -1, timeoutMs); }
         size_t sendAll (Print& to, const oneShotMs::timeType timeoutMs = oneShotMs::neverExpires) { return sendAll(&to, timeoutMs); }
 
-        // transfers data until a char is encountered (the char is swallowed but not transfered) with timeout
-        // returns number of transfered bytes
+        // transfers data until a char is encountered (the char is swallowed but not transferred) with timeout
+        // returns number of transferred bytes
         size_t sendUntil (Print* to, const int readUntilChar, const oneShotMs::timeType timeoutMs = oneShotMs::neverExpires) { return sendGeneric(to, -1, readUntilChar, timeoutMs); }
         size_t sendUntil (Print& to, const int readUntilChar, const oneShotMs::timeType timeoutMs = oneShotMs::neverExpires) { return sendUntil(&to, readUntilChar, timeoutMs); }
 
         // transfers data until requested size or timeout
-        // returns number of transfered bytes
+        // returns number of transferred bytes
         size_t sendSize (Print* to, const ssize_t maxLen, const oneShotMs::timeType timeoutMs = oneShotMs::neverExpires) { return sendGeneric(to, maxLen, -1, timeoutMs); }
         size_t sendSize (Print& to, const ssize_t maxLen, const oneShotMs::timeType timeoutMs = oneShotMs::neverExpires) { return sendSize(&to, maxLen, timeoutMs); }
 

cores/esp8266/StreamString.h

@@ -230,7 +230,7 @@ public:
     StreamString(StreamString&& bro): String(bro), S2Stream(this) { }
     StreamString(const StreamString& bro): String(bro), S2Stream(this) { }
 
-    // duplicate String contructors and operator=:
+    // duplicate String constructors and operator=:
 
     StreamString(const char* text = nullptr): String(text), S2Stream(this) { }
     StreamString(const String& string): String(string), S2Stream(this) { }

cores/esp8266/Updater.cpp

@@ -410,7 +410,7 @@ size_t UpdaterClass::write(uint8_t *data, size_t len) {
     left -= toBuff;
     if(!_async) yield();
   }
-  //lets see whats left
+  //lets see what's left
   memcpy(_buffer + _bufferLen, data + (len - left), left);
   _bufferLen += left;
   if(_bufferLen == remaining()){

cores/esp8266/Updater.h

@@ -108,12 +108,12 @@ class UpdaterClass {
     bool setMD5(const char * expected_md5);
 
     /*
-      returns the MD5 String of the sucessfully ended firmware
+      returns the MD5 String of the successfully ended firmware
     */
     String md5String(void){ return _md5.toString(); }
 
     /*
-      populated the result with the md5 bytes of the sucessfully ended firmware
+      populated the result with the md5 bytes of the successfully ended firmware
     */
     void md5(uint8_t * result){ return _md5.getBytes(result); }
 

cores/esp8266/core_esp8266_i2s.cpp

@@ -483,7 +483,7 @@ void i2s_set_dividers(uint8_t div1, uint8_t div2) {
   i2sc_temp |= (I2STXR); // Hold transmitter in reset
   I2SC = i2sc_temp;
 
-  // trans master(active low), recv master(active_low), !bits mod(==16 bits/chanel), clear clock dividers
+  // trans master(active low), recv master(active_low), !bits mod(==16 bits/channel), clear clock dividers
   i2sc_temp &= ~(I2STSM | I2SRSM | (I2SBMM << I2SBM) | (I2SBDM << I2SBD) | (I2SCDM << I2SCD));
 
   // I2SRF = Send/recv right channel first (? may be swapped form I2S spec of WS=0 => left)

cores/esp8266/core_esp8266_main.cpp

@@ -290,7 +290,7 @@ void init_done() {
    know if other features are using this, or if this memory is going to be
    used in future SDK releases.
 
-   WPS beeing flawed by its poor security, or not beeing used by lots of
+   WPS being flawed by its poor security, or not being used by lots of
    users, it has been decided that we are still going to use that memory for
    user's stack and disable the use of WPS.
 

cores/esp8266/core_esp8266_noniso.cpp

@@ -1,5 +1,5 @@
 /*
- core_esp8266_noniso.c - nonstandard (but usefull) conversion functions
+ core_esp8266_noniso.c - nonstandard (but useful) conversion functions
 
  Copyright (c) 2014 Ivan Grokhotkov. All rights reserved.
  This file is part of the esp8266 core for Arduino environment.

cores/esp8266/core_esp8266_phy.cpp

@@ -289,7 +289,7 @@ static const uint8_t ICACHE_FLASH_ATTR phy_init_data[128] =
 };
 
 
-// These functions will be overriden from C++ code.
+// These functions will be overridden from C++ code.
 // Unfortunately, we can't use extern "C" because Arduino preprocessor
 // doesn't generate forward declarations for extern "C" functions correctly,
 // so we use mangled names here.

cores/esp8266/core_esp8266_spi_utils.cpp

@@ -56,7 +56,7 @@ _SPICommand(volatile uint32_t spiIfNum,
   if (spiIfNum>1)
      return SPI_RESULT_ERR;
 
-  // force SPI register access via base+offest. 
+  // force SPI register access via base+offset. 
   // Prevents loading individual address constants from flash.
   uint32_t *spibase = (uint32_t*)(spiIfNum ? &(SPI1CMD) : &(SPI0CMD));
   #define SPIREG(reg) (*((volatile uint32_t *)(spibase+(&(reg) - &(SPI0CMD)))))
@@ -141,7 +141,7 @@ _SPICommand(volatile uint32_t spiIfNum,
  *		data has been sent.
  *
  *  Note: This code has only been tested with SPI bus 0, but should work
- *        equally well with other busses. The ESP8266 has bus 0 and 1,
+ *        equally well with other buses. The ESP8266 has bus 0 and 1,
  *        newer chips may have more one day.
  */
 SpiOpResult SPI0Command(uint8_t cmd, uint32_t *data, uint32_t mosi_bits, uint32_t miso_bits) {

cores/esp8266/core_esp8266_version.h

@@ -1,4 +1,3 @@
-
 /*
  core_esp8266_version.h - parse "git describe" at compile time
  Copyright (c) 2018 david gauchard. All rights reserved.
@@ -159,7 +158,7 @@ int coreVersionSubRevision ()
 }
 
 /*
- * unique revision indentifier (never decreases)
+ * unique revision identifier (never decreases)
  */
 constexpr
 int coreVersionNumeric ()

cores/esp8266/core_esp8266_wiring.cpp

@@ -69,8 +69,8 @@ void micros_overflow_tick(void* arg) {
 //---------------------------------------------------------------------------
 // millis() 'magic multiplier' approximation
 //
-// This function corrects the cumlative (296us / usec overflow) drift
-// seen in the orignal 'millis()' function.
+// This function corrects the cumulative (296us / usec overflow) drift
+// seen in the original 'millis()' function.
 //
 // Input:
 //    'm' - 32-bit usec counter,           0 <= m <= 0xFFFFFFFF

cores/esp8266/esp8266_peri.h

@@ -163,7 +163,7 @@ extern volatile uint32_t* const esp8266_gpioToFn[16];
 #define TCIS  8 //Interrupt Status
 #define TCTE  7 //Timer Enable
 #define TCAR  6 //AutoReload (restart timer when condition is reached)
-#define TCPD  2 //Prescale Devider (2bit) 0:1(12.5ns/tick), 1:16(0.2us/tick), 2/3:256(3.2us/tick)
+#define TCPD  2 //Prescale Divider (2bit) 0:1(12.5ns/tick), 1:16(0.2us/tick), 2/3:256(3.2us/tick)
 #define TCIT  0 //Interrupt Type 0:edge, 1:level
 
 //RTC Registers
@@ -271,7 +271,7 @@ extern volatile uint32_t* const esp8266_gpioToFn[16];
 #define UCRXI   19 //Invert RX
 #define UCTXRST 18 //Reset TX FIFO
 #define UCRXRST 17 //Reset RX FIFO
-#define UCTXHFE 15 //TX Harware Flow Enable
+#define UCTXHFE 15 //TX Hardware Flow Enable
 #define UCLBE   14 //LoopBack Enable
 #define UCBRK   8  //Send Break on the TX line
 #define UCSWDTR 7  //Set this bit to assert DTR
@@ -283,11 +283,11 @@ extern volatile uint32_t* const esp8266_gpioToFn[16];
 
 //UART CONF1 Registers Bits
 #define UCTOE   31 //RX TimeOut Enable
-#define UCTOT   24 //RX TimeOut Treshold (7bit)
-#define UCRXHFE 23 //RX Harware Flow Enable
-#define UCRXHFT 16 //RX Harware Flow Treshold (7bit)
-#define UCFET   8  //TX FIFO Empty Treshold (7bit)
-#define UCFFT   0  //RX FIFO Full Treshold (7bit)
+#define UCTOT   24 //RX TimeOut Threshold (7bit)
+#define UCRXHFE 23 //RX Hardware Flow Enable
+#define UCRXHFT 16 //RX Hardware Flow Threshold (7bit)
+#define UCFET   8  //TX FIFO Empty Threshold (7bit)
+#define UCFFT   0  //RX FIFO Full Threshold (7bit)
 
 //WDT Feed (the dog) Register
 #define WDTFEED    ESP8266_REG(0x914)
@@ -372,7 +372,7 @@ extern volatile uint32_t* const esp8266_gpioToFn[16];
 #define SPI1E3 		ESP8266_REG(0x1FC)
 #define SPI1W(p)  ESP8266_REG(0x140 + ((p & 0xF) * 4))
 
-//SPI0, SPI1 & I2S Interupt Register
+//SPI0, SPI1 & I2S Interrupt Register
 #define SPIIR     ESP8266_DREG(0x20)
 #define SPII0     4 //SPI0 Interrupt
 #define SPII1     7 //SPI1 Interrupt

cores/esp8266/esp8266_undocumented.h

@@ -185,7 +185,7 @@ typedef void (*fn_c_exception_handler_t)(struct __exception_frame *ef, int cause
   _xtos_c_handler_table[]. It is present when an exception handler has not been
   registered. It simply consist of a single instruction, `ret`.
   It is also internally used by `_xtos_set_exception_handler(cause, NULL)` to
-  reset a "C" exception handler back to the unhandled state. The coresponding
+  reset a "C" exception handler back to the unhandled state. The corresponding
   `_xtos_exc_handler_table` entry will be set to `_xtos_unhandled_exception`.
   Note, if nesting handlers is desired this must be implemented in the new "C"
   exception handler(s) being registered.

cores/esp8266/exc-sethandler.cpp

@@ -47,7 +47,7 @@
  *   https://github.com/qca/open-ath9k-htc-firmware/blob/master/sboot/magpie_1_1/sboot/athos/src/xtos/exc-sethandler.c
  *
  * It has been revised to use Arduino ESP8266 core includes, types, and
- * formating.
+ * formatting.
 */
 
 /* exc-sethandler.c - register an exception handler in XTOS */

cores/esp8266/gdb_hooks.h

@@ -27,7 +27,7 @@ extern "C" {
  * @brief Initialize GDB stub, if present
  * 
  * By default, this function is a no-op. When GDBStub library is linked,
- * this function is overriden and does necessary initialization of that library.
+ * this function is overridden and does necessary initialization of that library.
  * Called early at startup.
  */
 void gdb_init(void);
@@ -36,7 +36,7 @@ void gdb_init(void);
  * @brief Break into GDB, if present
  * 
  * By default, this function is a no-op. When GDBStub library is linked,
- * this function is overriden and triggers entry into the debugger, which
+ * this function is overridden and triggers entry into the debugger, which
  * looks like a breakpoint hit.
  */
 void gdb_do_break(void);
@@ -45,7 +45,7 @@ void gdb_do_break(void);
  * @brief Check if GDB stub is present.
  * 
  * By default, this function returns false. When GDBStub library is linked,
- * this function is overriden and returns true. Can be used to check whether
+ * this function is overridden and returns true. Can be used to check whether
  * GDB is used.
  * 
  * @return true if GDB stub is present
@@ -58,7 +58,7 @@ bool gdb_present(void);
  * @brief Check if GDB is installing a putc1 callback.
  * 
  * By default, this function returns false. When GDBStub library is linked,
- * this function is overriden and returns true.
+ * this function is overridden and returns true.
  * 
  * @return true if GDB is installing a putc1 callback
  */
@@ -69,7 +69,7 @@ bool gdbstub_has_putc1_control(void);
  * @param func function GDB will proxy putc1 data to
  * 
  * By default, this function is a no-op. When GDBStub library is linked,
- * this function is overriden and sets GDB stub's secondary putc1 callback to
+ * this function is overridden and sets GDB stub's secondary putc1 callback to
  * func. When GDB stub is linked, but a GDB session is not current attached,
  * then GDB stub will pass putc1 chars directly to this function.
  */
@@ -79,7 +79,7 @@ void gdbstub_set_putc1_callback(void (*func)(char));
  * @brief Check if GDB is installing a uart0 isr callback.
  * 
  * By default, this function returns false. When GDBStub library is linked,
- * this function is overriden and returns true.
+ * this function is overridden and returns true.
  * 
  * @return true if GDB is installing a uart0 isr callback
  */
@@ -90,7 +90,7 @@ bool gdbstub_has_uart_isr_control(void);
  * @param func function GDB will proxy uart0 isr data to
  * 
  * By default, this function is a no-op. When GDBStub library is linked,
- * this function is overriden and sets GDB stub's secondary uart0 isr callback
+ * this function is overridden and sets GDB stub's secondary uart0 isr callback
  * to func. When GDB stub is linked, but a GDB session is not current attached,
  * then GDB stub will pass uart0 isr data back to this function.
  */
@@ -101,7 +101,7 @@ void gdbstub_set_uart_isr_callback(void (*func)(void*, uint8_t), void* arg);
  * @param c character to write
  * 
  * By default, this function is a no-op. When GDBStub library is linked,
- * this function is overriden and writes a char to either the GDB session on
+ * this function is overridden and writes a char to either the GDB session on
  * uart0 or directly to uart0 if not GDB session is attached.
  */
 void gdbstub_write_char(char c);
@@ -112,7 +112,7 @@ void gdbstub_write_char(char c);
  * @param size length of buffer
  * 
  * By default, this function is a no-op. When GDBStub library is linked,
- * this function is overriden and writes a buffer to either the GDB session on
+ * this function is overridden and writes a buffer to either the GDB session on
  * uart0 or directly to uart0 if not GDB session is attached.
  */
 void gdbstub_write(const char* buf, size_t size);

cores/esp8266/heap.cpp

@@ -42,7 +42,7 @@ extern "C" {
 #define UMM_REALLOC_FL(p,s,f,l) realloc(p,s)
 #define UMM_FREE_FL(p,f,l)      free(p)
 
-// STATIC_ALWAYS_INLINE only applys to the non-debug build path,
+// STATIC_ALWAYS_INLINE only applies to the non-debug build path,
 // it must not be enabled on the debug build path.
 #define STATIC_ALWAYS_INLINE static ALWAYS_INLINE
 #endif
@@ -226,10 +226,10 @@ void IRAM_ATTR print_oom_size(size_t size)
      b. Before, when the *alloc function creates a new, not modified, allocation.
 
      In a free() or realloc() call, the focus is on their allocation. It is
-     checked 1st and reported on 1ST if an error exists. Full Posion Check is
+     checked 1st and reported on 1ST if an error exists. Full Poison Check is
      done after.
 
-     For malloc(), calloc(), and zalloc() Full Posion Check is done 1st since
+     For malloc(), calloc(), and zalloc() Full Poison Check is done 1st since
      these functions do not modify an existing allocation.
 */
 void* IRAM_ATTR malloc(size_t size)

cores/esp8266/hwdt_app_entry.cpp

@@ -376,7 +376,7 @@ extern hwdt_info_t hwdt_info;
 #undef hwdt_info_
 #undef hwdt_info
 #undef HWDT_VERIFY_HWDT_INFO
-static_assert(sizeof(hwdt_info_t) == sizeof(LOCAL_HWDT_INFO_T), "Local and include verison of hwdt_info_t do not match.");
+static_assert(sizeof(hwdt_info_t) == sizeof(LOCAL_HWDT_INFO_T), "Local and include version of hwdt_info_t do not match.");
 #endif
 
 
@@ -411,7 +411,7 @@ static_assert(sizeof(hwdt_info_t) == sizeof(LOCAL_HWDT_INFO_T), "Local and inclu
 #define CONT_STACK_A16_SZ  (MK_ALIGN16_SZ(sizeof(cont_t)))
 /*
  * For WPS support, cont stack comes out of the user's heap address space.
- * The the NONOS-SDK stack address is initialized before tbe reserved ROM stack
+ * The NONOS-SDK stack address is initialized before the reserved ROM stack
  * space. In this configuration there is no extra 4K in the heap.
  * Memory map: 0x3FFE8000, ..., (CONT_STACK), ..., (SYS), (ROM_STACK), 0x4000000
  *
@@ -764,8 +764,8 @@ void adjust_uart_speed(uint32_t uart_divisor) {
      * stablilize, and let the remote receiver come to an idle state before
      * continuing.
      *
-     * Load a Rubout character for the final charcter shifting out to stop
-     * the last charcter from getting crunched during the speed change.
+     * Load a Rubout character for the final character shifting out to stop
+     * the last character from getting crunched during the speed change.
      *
      * The thinking is if the speed changes while shifting out, as long as the
      * start bit gets out before the change. The change will not be noticed

cores/esp8266/interrupts.h

@@ -3,7 +3,7 @@
 
 #include <Arduino.h>
 
-// these auto classes wrap up xt_rsil so your code can be simplier, but can only be
+// these auto classes wrap up xt_rsil so your code can be simpler, but can only be
 // used in an ino or cpp files. 
 
 // InterruptLock is used when you want to completely disable interrupts

cores/esp8266/mmu_iram.cpp

@@ -80,7 +80,7 @@ extern "C" {
  *
  * "Cache_Read_Enable" is underdocumented. Main sources of information were from
  * rboot, zboot, https://richard.burtons.org/2015/06/12/esp8266-cache_read_enable/,
- * and other places. And some additional expermentation.
+ * and other places. And some additional experimentation.
  *
  * Searching through the NONOS SDK shows nothing on this API; however, some
  * clues on what the NONOS SDK might be doing with ICACHE related calls can be

cores/esp8266/mmu_iram.h

@@ -122,7 +122,7 @@ bool mmu_is_icache(const void *addr) {
 /*
  * Some inlines to allow faster random access to non32bit access of iRAM or
  * iCACHE data elements. These remove the extra time and stack space that would
- * have occured by relying on exception processing.
+ * have occurred by relying on exception processing.
  */
 static inline __attribute__((always_inline))
 uint8_t mmu_get_uint8(const void *p8) {

cores/esp8266/reboot_uart_dwnld.cpp

@@ -19,10 +19,10 @@
  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 
  This implementation is based on the original implementation of the ROM.
- It was shortend to reduce the memory usage. The complete version and the
+ It was shortened to reduce the memory usage. The complete version and the
  development history can be found in:
  https://github.com/twischer/Arduino/tree/reboot_uart_download_full
- This might be usefull in case of issues.
+ This might be useful in case of issues.
  */
 #include "reboot_uart_dwnld.h"
 #include <stdnoreturn.h>

cores/esp8266/spiffs/TECH_SPEC

@@ -113,7 +113,7 @@ Choosing the page size for the system involves many factors:
  - How fast must spiffs be
  - Other things impossible to find out
  
-So, chosing the Optimal Page Size (tm) seems tricky, to say the least. Don't 
+So, choosing the Optimal Page Size (tm) seems tricky, to say the least. Don't 
 fret - there is no optimal page size. This varies from how the target will use
 spiffs. Use the golden rule:
 

cores/esp8266/spiffs/spiffs.h

@@ -695,7 +695,7 @@ s32_t SPIFFS_tell(spiffs *fs, spiffs_file fh);
  * in this callback will mess things up for sure - do not do this.
  * This can be used to track where files are and move around during garbage
  * collection, which in turn can be used to build location tables in ram.
- * Used in conjuction with SPIFFS_open_by_page this may improve performance
+ * Used in conjunction with SPIFFS_open_by_page this may improve performance
  * when opening a lot of files.
  * Must be invoked after mount.
  *
@@ -710,7 +710,7 @@ s32_t SPIFFS_set_file_callback_func(spiffs *fs, spiffs_file_callback cb_func);
  * Maps the first level index lookup to a given memory map.
  * This will make reading big files faster, as the memory map will be used for
  * looking up data pages instead of searching for the indices on the physical
- * medium. When mapping, all affected indicies are found and the information is
+ * medium. When mapping, all affected indices are found and the information is
  * copied to the array.
  * Whole file or only parts of it may be mapped. The index map will cover file
  * contents from argument offset until and including arguments (offset+len).

cores/esp8266/spiffs/spiffs_nucleus.h

@@ -353,7 +353,7 @@ extern "C" {
     if ((ph).span_ix != (spix)) return SPIFFS_ERR_DATA_SPAN_MISMATCH;
 
 
-// check id, only visit matching objec ids
+// check id, only visit matching object ids
 #define SPIFFS_VIS_CHECK_ID     (1<<0)
 // report argument object id to visitor - else object lookup id is reported
 #define SPIFFS_VIS_CHECK_PH     (1<<1)

cores/esp8266/stdlib_noniso.cpp

@@ -1,5 +1,5 @@
 /*
-  stdlib_noniso.h - nonstandard (but usefull) conversion functions
+  stdlib_noniso.h - nonstandard (but useful) conversion functions
 
   Copyright (c) 2021 David Gauchard. All rights reserved.
   This file is part of the esp8266 core for Arduino environment.

cores/esp8266/stdlib_noniso.h

@@ -1,5 +1,5 @@
 /*
-  stdlib_noniso.h - nonstandard (but usefull) conversion functions
+  stdlib_noniso.h - nonstandard (but useful) conversion functions
 
   Copyright (c) 2014 Ivan Grokhotkov. All rights reserved.
   This file is part of the esp8266 core for Arduino environment.

cores/esp8266/umm_malloc/README.md

@@ -126,7 +126,7 @@ later.
 The result is that a block of memory on the free list uses just 8 bytes
 instead of 16.
 
-In fact, we go even one step futher when we realize that the free block
+In fact, we go even one step further when we realize that the free block
 index values are available to store data when the block is allocated.
 
 The overhead of an allocated block is therefore just 4 bytes.
@@ -205,7 +205,7 @@ described.
 allocated for use by the upper block.
 
 While we're talking about "upper" and "lower" blocks, we should make
-a comment about adresses. In the diagrams, a block higher up in the
+a comment about addresses. In the diagrams, a block higher up in the
 picture is at a lower address. And the blocks grow downwards their
 block index increases as does their physical address.
 
@@ -347,7 +347,7 @@ nf |*?? | ?? | ?? | cf |           nf | ?? | ?? | ?? | pf |
 ```
 
 This one is prety easy too, except we don't need to mess with the
-free list indexes at all becasue we'll allocate the new block at the
+free list indexes at all because we'll allocate the new block at the
 end of the current free block. We do, however have to adjust the
 indexes in cf, c, and n.
 
@@ -539,5 +539,5 @@ BEFORE                             AFTER
    +----+----+----+----+              +----+----+----+----+
 ```
 
-Then we call free() with the adress of the data portion of the new
+Then we call free() with the address of the data portion of the new
 block (s) which adds it to the free list.

cores/esp8266/umm_malloc/dbglog/dbglog.h

@@ -13,7 +13,7 @@
  * to set the trace level #define DBGLOG_LEVEL x
  *
  * To update which of the DBGLOG macros are compiled in, you must redefine the
- * DBGLOG_LEVEL macro and the inlcude the dbglog.h file again, like this:
+ * DBGLOG_LEVEL macro and the include the dbglog.h file again, like this:
  *
  * #undef  DBGLOG_LEVEL
  * #define DBGLOG_LEVEL 6

cores/esp8266/umm_malloc/umm_heap_select.h

@@ -7,7 +7,7 @@
 #define ALWAYS_INLINE inline __attribute__ ((always_inline))
 #endif
 
-// Use FORCE_ALWAYS_INLINE to ensure HeapSelect... construtor/deconstructor
+// Use FORCE_ALWAYS_INLINE to ensure HeapSelect... constructor/deconstructor
 // are placed in IRAM
 #ifdef FORCE_ALWAYS_INLINE_HEAP_SELECT
 #define MAYBE_ALWAYS_INLINE ALWAYS_INLINE

cores/esp8266/umm_malloc/umm_info.c

@@ -197,7 +197,7 @@ size_t umm_max_block_size( void ) {
 
 /*
   Without build option UMM_INLINE_METRICS, calls to umm_usage_metric() or
-  umm_fragmentation_metric() must to be preceeded by a call to umm_info(NULL, false)
+  umm_fragmentation_metric() must to be preceded by a call to umm_info(NULL, false)
   for updated results.
 */
 int umm_usage_metric_core( umm_heap_context_t *_context ) {

cores/esp8266/umm_malloc/umm_local.c

@@ -6,7 +6,7 @@
 
 #if defined(UMM_CRITICAL_METRICS)
 /*
- * umm_malloc performance measurments for critical sections
+ * umm_malloc performance measurements for critical sections
  */
 UMM_TIME_STATS time_stats = {
     {0xFFFFFFFF, 0U, 0U, 0U},

cores/esp8266/umm_malloc/umm_malloc.cpp

@@ -585,7 +585,7 @@ void umm_free( void *ptr ) {
     return;
   }
 
-  /* Free the memory withing a protected critical section */
+  /* Free the memory within a protected critical section */
 
   UMM_CRITICAL_ENTRY(id_free);
 
@@ -671,7 +671,7 @@ static void *umm_malloc_core( umm_heap_context_t *_context, size_t size ) {
      */
 
     if( blockSize == blocks ) {
-      /* It's an exact fit and we don't neet to split off a block. */
+      /* It's an exact fit and we don't need to split off a block. */
       DBGLOG_DEBUG( "Allocating %6d blocks starting at %6d - exact\n", blocks, cf );
 
       /* Disconnect this block from the FREE list */
@@ -755,7 +755,7 @@ void *umm_malloc( size_t size ) {
    * For allocating APIs `umm_heap_cur` is used to index and select a value for
    * `_context`. If an allocation is made from an ISR, this value is ignored and
    * the heap context for DRAM is loaded. For APIs that require operating on an
-   * existing allcation such as realloc and free, the heap context selected is
+   * existing allocation such as realloc and free, the heap context selected is
    * done by matching the allocation's address with that of one of the heap
    * address ranges.
    *
@@ -798,7 +798,7 @@ void *umm_malloc( size_t size ) {
     return( ptr );
   }
 
-  /* Allocate the memory withing a protected critical section */
+  /* Allocate the memory within a protected critical section */
 
   UMM_CRITICAL_ENTRY(id_malloc);
 

cores/esp8266/umm_malloc/umm_malloc_cfg.h

@@ -564,7 +564,7 @@ static inline void _critical_exit(UMM_TIME_STAT *p, uint32_t *saved_ps) {
  * direction of the beginning of the heap when possible.
  *
  * Status: TODO: These are new options introduced to optionally restore the
- * previous defrag propery of realloc. The issue has been raised in the upstream
+ * previous defrag property of realloc. The issue has been raised in the upstream
  * repo. No response at this time. Based on response, may propose for upstream.
  */
 /*
@@ -796,7 +796,7 @@ extern "C" {
 // Arduino.h recall us to redefine them
 #include <pgmspace.h>
 // Reuse pvPort* calls, since they already support passing location information.
-// Specificly the debug version (heap_...) that does not force DRAM heap.
+// Specifically the debug version (heap_...) that does not force DRAM heap.
 void* IRAM_ATTR heap_pvPortMalloc(size_t size, const char* file, int line);
 void* IRAM_ATTR heap_pvPortCalloc(size_t count, size_t size, const char* file, int line);
 void* IRAM_ATTR heap_pvPortRealloc(void *ptr, size_t size, const char* file, int line);

cores/esp8266/xtruntime-frames.h

@@ -54,7 +54,7 @@
  *  stack frame is limited to 128 bytes (currently at 64).
  */
 STRUCT_BEGIN
-STRUCT_FIELD (long,4,KEXC_,pc)		/* "parm" */
+STRUCT_FIELD (long,4,KEXC_,pc)		/* "param" */
 STRUCT_FIELD (long,4,KEXC_,ps)
 STRUCT_AFIELD(long,4,KEXC_,areg, 4)	/* a12 .. a15 */
 STRUCT_FIELD (long,4,KEXC_,sar)		/* "save" */