/*!
 * @file       apm32f10x_misc.c
 *
 * @brief      This file provides all the miscellaneous firmware functions.
 *             Include NVIC,SystemTick and Power management.
 *
 * @version    V1.0.1
 *
 * @date       2021-03-23
 *
 */

#include "apm32f10x_misc.h"

/** @addtogroup Peripherals_Library Standard Peripheral Library
  @{
*/

/** @addtogroup MISC_Driver MISC Driver
  @{
*/

/** @addtogroup MISC_Macros Macros
  @{
*/

#define AIRCR_VECTKEY_MASK    ((uint32_t)0x05FA0000)

/**@} end of group I2C_Macros*/


/** @addtogroup MISC_Fuctions Fuctions
  @{
*/

/*!
 * @brief     Configures the priority grouping: pre-emption priority and subpriority.
 *
 * @param     priorityGroup : specifies the priority grouping bits length.
 *                            This parameter can be one of the following values:
 *                            @arg NVIC_PRIORITY_GROUP_0
 *                            @arg NVIC_PRIORITY_GROUP_1
 *                            @arg NVIC_PRIORITY_GROUP_2
 *                            @arg NVIC_PRIORITY_GROUP_3
 *                            @arg NVIC_PRIORITY_GROUP_4
 *
 * @retval    None
 */
void NVIC_ConfigPriorityGroup(NVIC_PRIORITY_GROUP_T priorityGroup)
{
   SCB->AIRCR = AIRCR_VECTKEY_MASK | priorityGroup;
}

/*!
 * @brief     Enable NVIC request
 *
 * @param     irq: the NVIC interrupt request, detailed in IRQn_Type
 *            For the complete APM32 Devices IRQ Channels list,please refer to apm32f10x.h file
 *
 * @param     preemptionPriority: the pre-emption priority needed to set
 *
 * @param     subPriority: the subpriority needed to set
 *
 * @retval    None
 */
void NVIC_EnableIRQRequest(IRQn_Type irq, uint8_t preemptionPriority, uint8_t subPriority)
{
   uint32_t tempPriority, tempPrePri, tempSubPri;
   uint32_t priorityGrp;

   /** Get priority group */
   priorityGrp = (SCB->AIRCR) & (uint32_t)0x700U;

   /** get pre-emption priority and subpriority */
   switch(priorityGrp)
   {
      case NVIC_PRIORITY_GROUP_0:
         tempPrePri = 0;
         tempSubPri = 4;
         break;

      case NVIC_PRIORITY_GROUP_1:
         tempPrePri = 1;
         tempSubPri = 3;
         break;

      case NVIC_PRIORITY_GROUP_2:
         tempPrePri = 2;
         tempSubPri = 2;
         break;

      case NVIC_PRIORITY_GROUP_3:
         tempPrePri = 3;
         tempSubPri = 1;
         break;

      case NVIC_PRIORITY_GROUP_4:
         tempPrePri = 4;
         tempSubPri = 0;
         break;

      default:
         NVIC_ConfigPriorityGroup(NVIC_PRIORITY_GROUP_0);
         tempPrePri = 0;
         tempSubPri = 4;
         break;
   }

   tempPrePri = 4 - tempPrePri;
   tempSubPri = 4 - tempSubPri;
   tempPriority = preemptionPriority << tempPrePri;
   tempPriority |= subPriority & (0x0f >> tempSubPri);
   tempPriority <<= 4;
   NVIC->IP[irq] = (uint8_t)tempPriority;

    /* enable the selected IRQ */
    NVIC->ISER[irq >> 0x05U] = (uint32_t)0x01U << (irq & (uint8_t)0x1FU);
}

/*!
 * @brief     Disable NVIC request
 *
 * @param     irq: the NVIC interrupt request, detailed in IRQn_Type
 *
 * @retval    None
 */
void NVIC_DisableIRQRequest(IRQn_Type irq)
{
    /* disable the selected IRQ.*/
    NVIC->ICER[irq >> 0x05U] = (uint32_t)0x01U << (irq & (uint8_t)0x1FU);
}

/*!
 * @brief     Configs the vector table location and Offset.
 *
 * @param     vectTab: specifies if the vector table is in RAM or FLASH memory
 *                     This parameter can be one of the following values:
 *                     @arg NVIC_VECT_TAB_RAM
 *                     @arg NVIC_VECT_TAB_FLASH
 *
 * @param     Offset   Vector Table base offset field. This value must be a multiple of 0x200
 *
 * @retval    None
 */
void NVIC_ConfigVectorTable(NVIC_VECT_TAB_T vectTab, uint32_t offset)
{
    SCB->VTOR = vectTab | (offset & (uint32_t)0x1FFFFF80);
}

/*!
 * @brief     set the state of the low power mode
 *
 * @param     lowPowerMode: the low power mode state
 *                          This parameter can be one of the following values:
 *                          @arg NVIC_LOWPOWER_SEVONPEND
 *                          @arg NVIC_LOWPOWER_SLEEPDEEP
 *                          @arg NVIC_LOWPOWER_SLEEPONEXIT
 *
 * @retval    None
 */
void NVIC_SetSystemLowPower(NVIC_LOWPOWER_T lowPowerMode)
{
   SCB->SCR |= lowPowerMode;
}


/*!
 * @brief     reset the state of the low power mode
 *
 * @param     lowPowerMode: the low power mode state
 *                          This parameter can be one of the following values:
 *                          @arg NVIC_LOWPOWER_SEVONPEND
 *                          @arg NVIC_LOWPOWER_SLEEPDEEP
 *                          @arg NVIC_LOWPOWER_SLEEPONEXIT
 *
 * @retval    None
 */
void NVIC_ResetystemLowPower(NVIC_LOWPOWER_T lowPowerMode)
{
   SCB->SCR &= (uint32_t)(~(uint32_t)lowPowerMode);
}

/*!
 * @brief     Configures the SysTick clock source
 *
 * @param     clkSource: specifies the SysTick clock source
 *                       This parameter can be one of the following values:
 *                       @arg SYSTICK_CLK_SOURCE_HCLK_DIV8: AHB clock divided by 8 selected as SysTick clock source.
 *                       @arg SYSTICK_CLK_SOURCE_HCLK: AHB clock selected as SysTick clock source.
 *
 * @retval    None
 */
void SysTick_ConfigCLKSource(SYSTICK_CLK_SOURCE_T clkSource)
{
   if (clkSource == SYSTICK_CLK_SOURCE_HCLK)
   {
      SysTick->CTRL |= (uint32_t)BIT2;
   }
   else
   {
      SysTick->CTRL &= (uint32_t)(~BIT2);
   }
}

/**@} end of group MISC_Fuctions*/
/**@} end of group MISC_Driver */
/**@} end of group Peripherals_Library*/