text: /*
   * FreeRTOS Kernel V10.3.1
   * Copyright (C) 2020 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
   *
   * Permission is hereby granted, free of charge, to any person obtaining a copy of
   * this software and associated documentation files (the "Software"), to deal in
   * the Software without restriction, including without limitation the rights to
   * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
   * the Software, and to permit persons to whom the Software is furnished to do so,
   * subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in all
   * copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
   * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
   * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
   * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
   * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
   *
   * http://www.FreeRTOS.org
   * http://aws.amazon.com/freertos
   *
   * 1 tab == 4 spaces!
   */
  
  #ifndef PORTMACRO_H
      #define PORTMACRO_H
  
      #ifdef __cplusplus
          extern "C" {
      #endif
  
  /*-----------------------------------------------------------
   * Port specific definitions.
   *
   * The settings in this file configure FreeRTOS correctly for the
   * given hardware and compiler.
   *
   * These settings should not be altered.
   *-----------------------------------------------------------
   */
  
  /* Type definitions. */
      #define portCHAR          char
      #define portFLOAT         float
      #define portDOUBLE        double
      #define portLONG          long
      #define portSHORT         int
      #define portSTACK_TYPE    uint16_t
      #define portBASE_TYPE     short
  
      typedef portSTACK_TYPE   StackType_t;
      typedef short            BaseType_t;
      typedef unsigned short   UBaseType_t;
  
      #if ( configUSE_16_BIT_TICKS == 1 )
          typedef uint16_t     TickType_t;
          #define portMAX_DELAY    ( TickType_t ) 0xffff
      #else
          typedef uint32_t     TickType_t;
          #define portMAX_DELAY    ( TickType_t ) 0xffffffffUL
      #endif
  /*-----------------------------------------------------------*/
  
  /* Interrupt control macros. */
      #define portDISABLE_INTERRUPTS()    asm volatile ( "DINT" ); asm volatile ( "NOP" )
      #define portENABLE_INTERRUPTS()     asm volatile ( "EINT" ); asm volatile ( "NOP" )
  /*-----------------------------------------------------------*/
  
  /* Critical section control macros. */
      #define portNO_CRITICAL_SECTION_NESTING    ( ( uint16_t ) 0 )
  
      #define portENTER_CRITICAL()                                                 \
      {                                                                            \
          extern volatile uint16_t usCriticalNesting;                              \
                                                                                   \
          portDISABLE_INTERRUPTS();                                                \
                                                                                   \
          /* Now interrupts are disabled ulCriticalNesting can be accessed */      \
          /* directly.  Increment ulCriticalNesting to keep a count of how many */ \
          /* times portENTER_CRITICAL() has been called. */                        \
          usCriticalNesting++;                                                     \
      }
  
      #define portEXIT_CRITICAL()                                                     \
      {                                                                               \
          extern volatile uint16_t usCriticalNesting;                                 \
                                                                                      \
          if( usCriticalNesting > portNO_CRITICAL_SECTION_NESTING )                   \
          {                                                                           \
              /* Decrement the nesting count as we are leaving a critical section. */ \
              usCriticalNesting--;                                                    \
                                                                                      \
              /* If the nesting level has reached zero then interrupts should be */   \
              /* re-enabled. */                                                       \
              if( usCriticalNesting == portNO_CRITICAL_SECTION_NESTING )              \
              {                                                                       \
                  portENABLE_INTERRUPTS();                                            \
              }                                                                       \
          }                                                                           \
      }
  /*-----------------------------------------------------------*/
  
  /* Task utilities. */
      extern void vPortYield( void ) __attribute__( ( naked ) );
      #define portYIELD()    vPortYield()
      #define portNOP()      asm volatile ( "NOP" )
  /*-----------------------------------------------------------*/
  
  /* Hardwware specifics. */
      #define portBYTE_ALIGNMENT    2
      #define portSTACK_GROWTH      ( -1 )
      #define portTICK_PERIOD_MS    ( ( TickType_t ) 1000 / configTICK_RATE_HZ )
  /*-----------------------------------------------------------*/
  
  /* Task function macros as described on the FreeRTOS.org WEB site. */
      #define portTASK_FUNCTION_PROTO( vFunction, pvParameters )    void vFunction( void * pvParameters )
      #define portTASK_FUNCTION( vFunction, pvParameters )          void vFunction( void * pvParameters )
  
      #ifdef __cplusplus
          }
      #endif
  
  #endif /* PORTMACRO_H */
  