text: /*
   * FreeRTOS Kernel V10.0.0
   * Copyright (C) 2017 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. If you wish to use our Amazon
   * FreeRTOS name, please do so in a fair use way that does not cause confusion.
   *
   * 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_CMSIS_H
  #define PORTMACRO_CMSIS_H
  
  #include "app_util.h"
  #include "nordic_common.h"
  #ifdef SOFTDEVICE_PRESENT
  #include "app_error.h"
  #include "app_util_platform.h"
  #include "nrf_soc.h"
  #include "softdevice_handler.h"
  #endif
  
  #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 short
  #define portSTACK_TYPE uint32_t
  #define portBASE_TYPE long
  
  typedef portSTACK_TYPE StackType_t;
  typedef long BaseType_t;
  typedef unsigned long 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
  
  /* 32-bit tick type on a 32-bit architecture, so reads of the tick count do
  not need to be guarded with a critical section. */
  #define portTICK_TYPE_IS_ATOMIC 1
  #endif
  /*-----------------------------------------------------------*/
  
  /* Architecture specifics. */
  #define portSTACK_GROWTH (-1)
  #define portTICK_PERIOD_MS ((TickType_t)1000 / configTICK_RATE_HZ)
  #define portBYTE_ALIGNMENT 8
  
  /* RTC register */
  #define portNRF_RTC_REG NRF_RTC1
  /* IRQn used by the selected RTC */
  #define portNRF_RTC_IRQn RTC1_IRQn
  /* Constants required to manipulate the NVIC. */
  #define portNRF_RTC_PRESCALER \
  	((uint32_t)(ROUNDED_DIV(configSYSTICK_CLOCK_HZ, configTICK_RATE_HZ) - 1))
  /* Maximum RTC ticks */
  #define portNRF_RTC_MAXTICKS ((1U << 24) - 1U)
  /*-----------------------------------------------------------*/
  
  /* Internal auxiliary macro */
  #define portPendSVSchedule()                            \
  	do                                                  \
  	{                                                   \
  		/* Set a PendSV to request a context switch. */ \
  		SCB->ICSR = SCB_ICSR_PENDSVSET_Msk;             \
  		__SEV();                                        \
  		__DSB();                                        \
  		__ISB();                                        \
  	} while(0)
  
  /* Scheduler utilities. */
  #define portYIELD() vPortTaskYield()
  
  #define portEND_SWITCHING_ISR(xSwitchRequired) \
  	if((xSwitchRequired) != pdFALSE)           \
  	{                                          \
  		portPendSVSchedule();                  \
  	}
  #define portYIELD_FROM_ISR(x) portEND_SWITCHING_ISR(x)
  /*-----------------------------------------------------------*/
  
  /* Critical section management. */
  extern void vPortEnterCritical(void);
  extern void vPortExitCritical(void);
  extern void vPortTaskYield(void);
  #define portSET_INTERRUPT_MASK_FROM_ISR() ulPortDisableISR()
  #define portCLEAR_INTERRUPT_MASK_FROM_ISR(x) vPortRestoreISR(x)
  #define portDISABLE_INTERRUPTS() vPortDisableISR()
  #define portENABLE_INTERRUPTS() vPortEnableISR()
  #define portENTER_CRITICAL() vPortEnterCritical()
  #define portEXIT_CRITICAL() vPortExitCritical()
  
  /*-----------------------------------------------------------*/
  
  /* Task function macros as described on the FreeRTOS.org WEB site.  These are
  not necessary for to use this port.  They are defined so the common demo files
  (which build with all the ports) will build. */
  #define portTASK_FUNCTION_PROTO(vFunction, pvParameters) void vFunction(void* pvParameters)
  #define portTASK_FUNCTION(vFunction, pvParameters) void vFunction(void* pvParameters)
  /*-----------------------------------------------------------*/
  
  /* Tickless idle/low power functionality. */
  #ifndef portSUPPRESS_TICKS_AND_SLEEP
  extern void vPortSuppressTicksAndSleep(TickType_t xExpectedIdleTime);
  #define portSUPPRESS_TICKS_AND_SLEEP(xExpectedIdleTime) \
  	vPortSuppressTicksAndSleep(xExpectedIdleTime)
  #endif
  
  /*-----------------------------------------------------------*/
  
  __STATIC_INLINE void vPortDisableISR(void)
  {
  #ifdef SOFTDEVICE_PRESENT
  	uint8_t dummy = 0;
  	uint32_t err_code = sd_nvic_critical_region_enter(&dummy);
  	APP_ERROR_CHECK(err_code);
  #else
  	__disable_irq();
  #endif
  }
  
  __STATIC_INLINE void vPortEnableISR(void)
  {
  #ifdef SOFTDEVICE_PRESENT
  	uint32_t err_code = sd_nvic_critical_region_exit(0);
  	APP_ERROR_CHECK(err_code);
  #else
  	__enable_irq();
  #endif
  }
  
  /* Union used to remember current ISR state.
   * It concentrates information about ISR state and internal SD state into 32 bit variable. */
  typedef union
  {
  	uint32_t u32; //< 32 bit access to the variable
  	uint8_t sd_nested; //< Soft device nested element
  	bool irq_nested; //< Global was disabled
  } portISRState_t;
  
  static inline uint32_t ulPortDisableISR(void)
  {
  	portISRState_t isrs = {0};
  #ifdef SOFTDEVICE_PRESENT
  	uint32_t err_code = sd_nvic_critical_region_enter(&isrs.sd_nested);
  	APP_ERROR_CHECK(err_code);
  #else
  	uint32_t primask = __get_PRIMASK();
  	if(primask == 0)
  	{
  		__disable_irq();
  	}
  	else
  	{
  		isrs.irq_nested = true;
  	}
  #endif
  	return isrs.u32;
  }
  
  static inline void vPortRestoreISR(uint32_t state)
  {
  	portISRState_t isrs = {state};
  #ifdef SOFTDEVICE_PRESENT
  	uint32_t err_code = sd_nvic_critical_region_exit(isrs.sd_nested);
  	APP_ERROR_CHECK(err_code);
  #else
  	if(!isrs.irq_nested)
  	{
  		__enable_irq();
  	}
  #endif
  }
  
  /*-----------------------------------------------------------*/
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif /* PORTMACRO_CMSIS_H */
  