FreeRTOS: Update API reference from words to bytes

This commit updates some of the API references in task.h so
that stack sizes are referred to in bytes rather than words as
found in the vanilla version.

Closes #2528

components/freertos/include/freertos/task.h

@@ -308,9 +308,7 @@ is used in assert() statements. */
  * is 16.
  *
  * @param usStackDepth The size of the task stack specified as the number of
- * variables the stack can hold - not the number of bytes.  For example, if
+ * bytes. Note that this differs from vanilla FreeRTOS.
- * the stack is 16 bits wide and usStackDepth is defined as 100, 200 bytes
- * will be allocated for stack storage.
  *
  * @param pvParameters Pointer that will be used as the parameter for the task
  * being created.
@@ -375,9 +373,7 @@ is used in assert() statements. */
  * is 16.
  *
  * @param usStackDepth The size of the task stack specified as the number of
- * variables the stack can hold - not the number of bytes.  For example, if
+ * bytes. Note that this differs from vanilla FreeRTOS.
- * the stack is 16 bits wide and usStackDepth is defined as 100, 200 bytes
- * will be allocated for stack storage.
  *
  * @param pvParameters Pointer that will be used as the parameter for the task
  * being created.
@@ -463,9 +459,7 @@ is used in assert() statements. */
  * configMAX_TASK_NAME_LEN in FreeRTOSConfig.h.
  *
  * @param ulStackDepth The size of the task stack specified as the number of
- * variables the stack can hold - not the number of bytes.  For example, if
+ * bytes. Note that this differs from vanilla FreeRTOS.
- * the stack is 32-bits wide and ulStackDepth is defined as 100 then 400 bytes
- * will be allocated for stack storage.
  *
  * @param pvParameters Pointer that will be used as the parameter for the task
  * being created.
@@ -525,9 +519,7 @@ is used in assert() statements. */
  * configMAX_TASK_NAME_LEN in FreeRTOSConfig.h.
  *
  * @param ulStackDepth The size of the task stack specified as the number of
- * variables the stack can hold - not the number of bytes.  For example, if
+ * bytes. Note that this differs from vanilla FreeRTOS.
- * the stack is 32-bits wide and ulStackDepth is defined as 100 then 400 bytes
- * will be allocated for stack storage.
  *
  * @param pvParameters Pointer that will be used as the parameter for the task
  * being created.
@@ -554,9 +546,8 @@ is used in assert() statements. */
  * @code{c}
  *
  *     // Dimensions the buffer that the task being created will use as its stack.
- *     // NOTE:  This is the number of words the stack will hold, not the number of
+ *     // NOTE:  This is the number of bytes the stack will hold, not the number of
- *     // bytes.  For example, if each stack item is 32-bits, and this is set to 100,
+ *     // words as found in vanilla FreeRTOS.
- *     // then 400 bytes (100 * 32-bits) will be allocated.
  *     #define STACK_SIZE 200
  *
  *     // Structure that will hold the TCB of the task being created.
@@ -589,7 +580,7 @@ is used in assert() statements. */
  *         xHandle = xTaskCreateStatic(
  *                       vTaskCode,       // Function that implements the task.
  *                       "NAME",          // Text name for the task.
- *                       STACK_SIZE,      // Stack size in words, not bytes.
+ *                       STACK_SIZE,      // Stack size in bytes, not words.
  *                       ( void * ) 1,    // Parameter passed into the task.
  *                       tskIDLE_PRIORITY,// Priority at which the task is created.
  *                       xStack,          // Array to use as the task's stack.
@@ -645,7 +636,7 @@ is used in assert() statements. */
  * {
  * 	vATask,		// pvTaskCode - the function that implements the task.
  * 	"ATask",	// pcName - just a text name for the task to assist debugging.
- * 	100,		// usStackDepth	- the stack size DEFINED IN WORDS.
+ * 	100,		// usStackDepth	- the stack size DEFINED IN BYTES.
  * 	NULL,		// pvParameters - passed into the task function as the function parameters.
  * 	( 1UL | portPRIVILEGE_BIT ),// uxPriority - task priority, set the portPRIVILEGE_BIT if the task should run in a privileged state.
  * 	cStackBuffer,// puxStackBuffer - the buffer to be used as the task stack.
@@ -1342,15 +1333,15 @@ char *pcTaskGetTaskName( TaskHandle_t xTaskToQuery ) PRIVILEGED_FUNCTION; /*lint
  * INCLUDE_uxTaskGetStackHighWaterMark must be set to 1 in FreeRTOSConfig.h for
  * this function to be available.
  *
- * High water mark is the minimum free stack space there has been (in words,
+ * High water mark is the minimum free stack space there has been (in bytes
- * so on a 32 bit machine a value of 1 means 4 bytes) since the task started.
+ * rather than words as found in vanilla FreeRTOS) since the task started.
  * The smaller the returned number the closer the task has come to overflowing its stack.
  *
  * @param xTask Handle of the task associated with the stack to be checked.
  * Set xTask to NULL to check the stack of the calling task.
  *
- * @return The smallest amount of free stack space there has been (in words, so
+ * @return The smallest amount of free stack space there has been (in bytes
- * actual spaces on the stack rather than bytes) since the task referenced by
+ * rather than words as found in vanilla FreeRTOS) since the task referenced by
  * xTask was created.
  */
 UBaseType_t uxTaskGetStackHighWaterMark( TaskHandle_t xTask ) PRIVILEGED_FUNCTION;