/*****************************************************************************
 * Copyright (c) 2019, Nations Technologies Inc.
 *
 * All rights reserved.
 * ****************************************************************************
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the disclaimer below.
 *
 * Nations' name may not be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY NATIONS "AS IS" AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
 * DISCLAIMED. IN NO EVENT SHALL NATIONS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * ****************************************************************************/

/**
 * @file n32g030_gpio.c
 * @author Nations 
 * @version v1.0.0
 *
 * @copyright Copyright (c) 2019, Nations Technologies Inc. All rights reserved.
 */
#include "n32g030_gpio.h"

/** @addtogroup N32G030_StdPeriph_Driver
 * @{
 */

/** @addtogroup GPIO
 * @brief GPIO driver modules
 * @{
 */

/** @addtogroup GPIO_Private_TypesDefinitions
 * @{
 */

/**
 * @}
 */

/** @addtogroup GPIO_Private_Defines
 * @{
 */
      
#define GPIO_MODE             			((uint32_t)0x00000003)
#define EXTI_MODE             			((uint32_t)0x10000000)
#define GPIO_MODE_IT          			((uint32_t)0x00010000)
#define GPIO_MODE_EVT         			((uint32_t)0x00020000)
#define RISING_EDGE           			((uint32_t)0x00100000) 
#define FALLING_EDGE          			((uint32_t)0x00200000)
#define GPIO_OUTPUT_TYPE      			((uint32_t)0x00000010)

/**
 * @}
 */

/** @addtogroup GPIO_Private_Macros
 * @{
 */

/**
 * @}
 */

/** @addtogroup GPIO_Private_Variables
 * @{
 */

/**
 * @}
 */

/** @addtogroup GPIO_Private_FunctionPrototypes
 * @{
 */

/**
 * @}
 */

/** @addtogroup GPIO_Private_Functions
 * @{
 */

/**
 * @brief  Deinitializes the GPIOx peripheral registers to their default reset values.
 * @param GPIOx where x can be (A,B,C,D,F) to select the GPIO peripheral.
 */
void GPIO_DeInit(GPIO_Module* GPIOx)
{
    /* Check the parameters */
    assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
    
	if (GPIOx == GPIOA)
    {
        RCC_EnableAPB2PeriphReset(RCC_APB2_PERIPH_GPIOA, ENABLE);
        RCC_EnableAPB2PeriphReset(RCC_APB2_PERIPH_GPIOA, DISABLE);
    }
    else if (GPIOx == GPIOB)
    {
        RCC_EnableAPB2PeriphReset(RCC_APB2_PERIPH_GPIOB, ENABLE);
        RCC_EnableAPB2PeriphReset(RCC_APB2_PERIPH_GPIOB, DISABLE);
    }
    else if (GPIOx == GPIOC)
    {
        RCC_EnableAPB2PeriphReset(RCC_APB2_PERIPH_GPIOC, ENABLE);
        RCC_EnableAPB2PeriphReset(RCC_APB2_PERIPH_GPIOC, DISABLE);
    }
    else if (GPIOx == GPIOF)
    {
        RCC_EnableAPB2PeriphReset(RCC_APB2_PERIPH_GPIOF, ENABLE);
        RCC_EnableAPB2PeriphReset(RCC_APB2_PERIPH_GPIOF, DISABLE);
    }
    else
    {
    	return;
    }
}

/**
 * @brief  Deinitializes the GPIOx peripheral registers to their default reset values.
 * @param GPIOx where x can be (A,B,C,D,F) to select the GPIO peripheral.
 * @param GPIO_Pin specifies the port bit to be written.
  *                This parameter can be one of GPIO_PIN_x where x can be (0..15).
  *                All port bits are not necessarily available on all GPIOs.
 */
void GPIO_DeInitPin(GPIO_Module* GPIOx, uint32_t Pin)
{
	uint32_t pos = 0x00U, currentpin = 0x00U;
	uint32_t tmpregister = 0x00U; 

    /* Check the parameters */
    assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
	assert_param(IS_GPIO_PIN_AVAILABLE(GPIOx, Pin));

    while((Pin >> pos) != 0)
	{
		/* Get the IO position */
		currentpin = (Pin) & (1U << pos);

		if(currentpin)
		{
			/*------------------------- GPIO Mode Configuration --------------------*/
			/* Configure IO Direction in Analog Mode */
			GPIOx->PMODE |= (GPIO_PMODE0 << (pos * 2U));

			/* Configure the default Alternate Function in current IO */ 
			if(pos & 0x08)
				GPIOx->AFH |= ((0x0FUL) << ((pos & 0x07U) * 4U));
			else
				GPIOx->AFL |= ((0x0FUL) << ((pos & 0x07U) * 4U));

			/* Configure the default value IO Output Type */
			GPIOx->POTYPE &= ~(GPIO_POTYPE_POT_0 << pos);

			/* Deactivate the Pull-up and Pull-down resistor for the current IO */
			GPIOx->PUPD &= ~(GPIO_PUPD0 << (pos * 2U));

			/* Configure the default value for IO Speed */
			GPIOx->SR |= (GPIO_SR_SR0 << pos);

			/* Configure the default value for IO Speed */
			GPIOx->DS &= ~(GPIO_DS_DS0 << pos);

			/*------------------------- EXTI Mode Configuration --------------------*/
			/* Clear the External Interrupt or Event for the current IO */
			tmpregister = AFIO->EXTI_CFG[pos >> 2U];
			tmpregister &= ((0x0FUL) << ((pos & 0x03U) * 4U));
			if(tmpregister == (GPIO_GET_INDEX(GPIOx) << ((pos & 0x03U) * 4U)))
			{
				AFIO->EXTI_CFG[pos >> 2U] &= ~((0x0FUL) << ((pos & 0x03U) * 4U));

				/* Clear EXTI line configuration */
				EXTI->IMASK &= ~((uint32_t)currentpin);
				EXTI->EMASK &= ~((uint32_t)currentpin);

				/* Clear Rising Falling edge configuration */
				EXTI->RT_CFG &= ~((uint32_t)currentpin);
				EXTI->FT_CFG &= ~((uint32_t)currentpin);
			}
		} 
		pos++;
	}
	
}

/**
 * @brief  Deinitializes the Alternate Functions (remap, event control
 *   and EXTI configuration) registers to their default reset values.
 */
void GPIO_AFIOInitDefault(void)
{
    RCC_EnableAPB2PeriphReset(RCC_APB2_PERIPH_AFIO, ENABLE);
    RCC_EnableAPB2PeriphReset(RCC_APB2_PERIPH_AFIO, DISABLE);
}

/**
 * @brief  Initializes the GPIOx peripheral according to the specified
 *         parameters in the GPIO_InitStruct.
 * @param GPIOx where x can be (A,B,C,D,F) to select the GPIO peripheral.
 * @param GPIO_InitStruct pointer to a GPIO_InitType structure that
 *         contains the configuration information for the specified GPIO peripheral.
 */
 
void GPIO_InitPeripheral(GPIO_Module* GPIOx, GPIO_InitType * GPIO_InitStruct)
{
    uint32_t pos = 0x00U, currentpin = 0x00U;
	uint32_t tmpregister = 0x00U; 
	
    /* Check the parameters */
    assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
	assert_param(IS_GPIO_PIN_AVAILABLE(GPIOx, GPIO_InitStruct->Pin));
	// assert_param(IS_GPIO_AF(GPIO_InitStruct->GPIO_Alternate)); 
    assert_param(IS_GPIO_MODE(GPIO_InitStruct->GPIO_Mode));	
	assert_param(IS_GPIO_PULL(GPIO_InitStruct->GPIO_Pull));				
	assert_param(IS_GPIO_SPEED(GPIO_InitStruct->GPIO_Speed));
	assert_param(IS_GPIO_CURRENT(GPIO_InitStruct->GPIO_Current));

    while(((GPIO_InitStruct->Pin) >> pos) != 0)
	{
		/* Get the IO position */
		currentpin = (GPIO_InitStruct->Pin) & (1U << pos);

		if(currentpin)
		{
			/*--------------------- GPIO Mode Configuration ------------------------*/
      		/* In case of Alternate function mode selection */
			if((GPIO_InitStruct->GPIO_Mode == GPIO_MODE_AF_PP) || (GPIO_InitStruct->GPIO_Mode == GPIO_MODE_AF_OD))
			{
				/* Check the Alternate function parameters */
				assert_param(IS_GPIO_AF(GPIO_InitStruct->GPIO_Alternate));

				/* Configure Alternate function mapped with the current IO */
				if(pos & 0x08)
				{
					tmpregister = GPIOx->AFH;
					tmpregister &= ~((uint32_t)0xF << ((uint32_t)(pos & (uint32_t)0x07) * 4U));
					tmpregister |= ((uint32_t)(GPIO_InitStruct->GPIO_Alternate) << ((uint32_t)(pos & (uint32_t)0x07) * 4U)) ;
					GPIOx->AFH = tmpregister;
				}
				else
				{
				  tmpregister = GPIOx->AFL;
					tmpregister &= ~((uint32_t)0xF << ((uint32_t)(pos & (uint32_t)0x07) * 4U)) ;
					tmpregister |= ((uint32_t)(GPIO_InitStruct->GPIO_Alternate) << ((uint32_t)(pos & (uint32_t)0x07) * 4U)) ;
					GPIOx->AFL = tmpregister;
				}
			}

			/* In case of Output or Alternate function mode selection */
			if ((GPIO_InitStruct->GPIO_Mode == GPIO_MODE_OUTPUT_PP) || (GPIO_InitStruct->GPIO_Mode == GPIO_MODE_OUTPUT_OD)
				 ||(GPIO_InitStruct->GPIO_Mode == GPIO_MODE_AF_PP) || (GPIO_InitStruct->GPIO_Mode == GPIO_MODE_AF_OD))
			{
				/* Configure the IO Output Type */
				tmpregister = GPIOx->POTYPE;
				tmpregister &= ~(GPIO_POTYPE_POT_0 << pos);				
				tmpregister |= (((GPIO_InitStruct->GPIO_Mode >> 4U) & 0x01U) << pos);
				GPIOx->POTYPE = tmpregister;
			}

			/*---------------------------- GPIO Mode Configuration -----------------------*/
			/* Configure IO Direction mode (Input, Output, Alternate or Analog) */
			tmpregister = GPIOx->PMODE;
			tmpregister &= ~(GPIO_PMODE0 << (pos * 2U));
			tmpregister |= (((GPIO_InitStruct->GPIO_Mode & 0x03U) << (pos * 2U)));
			GPIOx->PMODE = tmpregister;

			/* Configure pull-down mode */
			tmpregister = GPIOx->PUPD;	
			tmpregister &= ~(GPIO_PUPD0 << (pos * 2U));
			tmpregister |= (GPIO_InitStruct->GPIO_Pull << (pos * 2U));
			GPIOx->PUPD = tmpregister;	

			/* Configure slew rate */
			tmpregister = GPIOx->SR;
			tmpregister &= ~(GPIO_SR_SR0 << pos);
			tmpregister |= (GPIO_InitStruct->GPIO_Speed << pos);
			GPIOx->SR = tmpregister;

			/* Configure driver current */
			tmpregister = GPIOx->DS;
			tmpregister &= ~(GPIO_DS_DS0 << pos);
			tmpregister |= (GPIO_InitStruct->GPIO_Current << pos);
			GPIOx->DS = tmpregister;

			/*--------------------- EXTI Mode Configuration ------------------------*/
			/* Configure the External Interrupt or event for the current IO */
			if((GPIO_InitStruct->GPIO_Mode & EXTI_MODE) == EXTI_MODE) 
			{
				tmpregister = AFIO->EXTI_CFG[pos >> 2U];
				tmpregister &= ~(0x0FUL << ((pos & 0x03U) * 4U));
				tmpregister |= (GPIO_GET_INDEX(GPIOx) << ((pos & 0x03U) * 4U));
				AFIO->EXTI_CFG[pos >> 2U] = tmpregister;

				/* Clear EXTI line configuration */
				tmpregister = EXTI->IMASK;
				tmpregister &= ~((uint32_t)currentpin);
				if((GPIO_InitStruct->GPIO_Mode & GPIO_MODE_IT) == GPIO_MODE_IT)
				{
					tmpregister |= currentpin;
				}
				EXTI->IMASK = tmpregister;

				tmpregister = EXTI->EMASK;
				tmpregister &= ~((uint32_t)currentpin);
				if((GPIO_InitStruct->GPIO_Mode & GPIO_MODE_EVT) == GPIO_MODE_EVT)
				{
					tmpregister |= currentpin;
				}
				EXTI->EMASK = tmpregister;

				/* Clear Rising Falling edge configuration */
				tmpregister = EXTI->RT_CFG;
				tmpregister &= ~((uint32_t)currentpin);
				if((GPIO_InitStruct->GPIO_Mode & RISING_EDGE) == RISING_EDGE)
				{
					tmpregister |= currentpin;
				}
				EXTI->RT_CFG = tmpregister;

				tmpregister = EXTI->FT_CFG;
				tmpregister &= ~((uint32_t)currentpin);
				if((GPIO_InitStruct->GPIO_Mode & FALLING_EDGE) == FALLING_EDGE)
				{
					tmpregister |= currentpin;
				}
				EXTI->FT_CFG = tmpregister;
			}
		}
		pos++;      
	}	
}

/**
 * @brief  Fills each GPIO_InitStruct member with its default value.
 * @param GPIO_InitStruct pointer to a GPIO_InitType structure which will
 *         be initialized.
 */
void GPIO_InitStruct(GPIO_InitType* GPIO_InitStruct)
{	
    /* Reset GPIO init structure parameters values */
    GPIO_InitStruct->Pin			= GPIO_PIN_ALL;
	GPIO_InitStruct->GPIO_Alternate = GPIO_NO_AF;
	GPIO_InitStruct->GPIO_Mode		= GPIO_MODE_INPUT;
	GPIO_InitStruct->GPIO_Pull		= GPIO_NO_PULL;
	GPIO_InitStruct->GPIO_Speed		= GPIO_SPEED_LOW;	
	GPIO_InitStruct->GPIO_Current	= GPIO_DC_HIGH;
}

/**
 * @brief  Reads the specified input port pin.
 * @param GPIOx where x can be (A,B,C,D,F) to select the GPIO peripheral.
 * @param Pin specifies the port bit to read.
 *   This parameter can be GPIO_Pin_x where x can be (0..15).
 * @return The input port pin value.
 */
uint8_t GPIO_ReadInputDataBit(GPIO_Module* GPIOx, uint16_t Pin)
{
    uint8_t bitstatus = 0x00;

    /* Check the parameters */
    assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
	assert_param(IS_GPIO_PIN_AVAILABLE(GPIOx, Pin));

    if ((GPIOx->PID & Pin) != (uint32_t)Bit_RESET)
    {
        bitstatus = (uint8_t)Bit_SET;
    }
    else
    {
        bitstatus = (uint8_t)Bit_RESET;
    }
    return bitstatus;
}

/**
 * @brief  Reads the specified GPIO input data port.
 * @param GPIOx where x can be (A,B,C,D,F) to select the GPIO peripheral.
 * @return GPIO input data port value.
 */
uint16_t GPIO_ReadInputData(GPIO_Module* GPIOx)
{
    /* Check the parameters */
    assert_param(IS_GPIO_ALL_PERIPH(GPIOx));

    return ((uint16_t)GPIOx->PID);
}

/**
 * @brief  Reads the specified output data port bit.
 * @param GPIOx where x can be (A,B,C,D,F) to select the GPIO peripheral.
 * @param Pin specifies the port bit to read.
 *   This parameter can be GPIO_Pin_x where x can be (0..15).
 * @return The output port pin value.
 */
uint8_t GPIO_ReadOutputDataBit(GPIO_Module* GPIOx, uint16_t Pin)
{
    uint8_t bitstatus = 0x00;

    /* Check the parameters */
    assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
	assert_param(IS_GPIO_PIN_AVAILABLE(GPIOx, Pin));

    if ((GPIOx->POD & Pin) != (uint32_t)Bit_RESET)
    {
        bitstatus = (uint8_t)Bit_SET;
    }
    else
    {
        bitstatus = (uint8_t)Bit_RESET;
    }
    return bitstatus;
}

/**
 * @brief  Reads the specified GPIO output data port.
 * @param GPIOx where x can be (A,B,C,D,F) to select the GPIO peripheral.
 * @return GPIO output data port value.
 */
uint16_t GPIO_ReadOutputData(GPIO_Module* GPIOx)
{
    /* Check the parameters */
    assert_param(IS_GPIO_ALL_PERIPH(GPIOx));

    return ((uint16_t)GPIOx->POD);
}

/**
 * @brief  Sets the selected data port bits.
 * @param GPIOx where x can be (A,B,C,D,F) to select the GPIO peripheral.
 * @param Pin specifies the port bits to be written.
 *   This parameter can be any combination of GPIO_Pin_x where x can be (0..15).
 */
void GPIO_SetBits(GPIO_Module* GPIOx, uint16_t Pin)
{
    /* Check the parameters */
    assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
	assert_param(IS_GPIO_PIN_AVAILABLE(GPIOx, Pin));

    GPIOx->PBSC = Pin;
}

/**
 * @brief  Clears the selected data port bits.
 * @param GPIOx where x can be (A,B,C,D,F) to select the GPIO peripheral.
 * @param Pin specifies the port bits to be written.
 *   This parameter can be any combination of GPIO_Pin_x where x can be (0..15).
 */
void GPIO_ResetBits(GPIO_Module* GPIOx, uint16_t Pin)
{
    /* Check the parameters */
    assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
	assert_param(IS_GPIO_PIN_AVAILABLE(GPIOx, Pin));

    GPIOx->PBC = Pin;
}

/**
 * @brief  Sets or clears the selected data port bit.
 * @param GPIOx where x can be (A,B,C,D,F) to select the GPIO peripheral.
 * @param Pin specifies the port bit to be written.
 *   This parameter can be one of GPIO_Pin_x where x can be (0..15).
 * @param BitCmd specifies the value to be written to the selected bit.
 *   This parameter can be one of the Bit_OperateType enum values:
 *     @arg Bit_RESET to clear the port pin
 *     @arg Bit_SET to set the port pin
 */
void GPIO_WriteBit(GPIO_Module* GPIOx, uint16_t Pin, Bit_OperateType BitCmd)
{
    /* Check the parameters */
    assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
	assert_param(IS_GPIO_PIN_AVAILABLE(GPIOx, Pin));
    assert_param(IS_GPIO_BIT_OPERATE(BitCmd));

    if (BitCmd != Bit_RESET)
    {
        GPIOx->PBSC = Pin;
    }
    else
    {
        GPIOx->PBC = Pin;
    }
}

/**
 * @brief  Writes data to the specified GPIO data port.
 * @param GPIOx where x can be (A,B,C,D,F) to select the GPIO peripheral.
 * @param PortVal specifies the value to be written to the port output data register.
 */
void GPIO_Write(GPIO_Module* GPIOx, uint16_t PortVal)
{
    /* Check the parameters */
    assert_param(IS_GPIO_ALL_PERIPH(GPIOx));	

    GPIOx->POD = PortVal;
}

/**
  * @brief  Toggles the specified GPIO pins.
  * @param GPIOx Where x can be (A,B,C,D,F) to select the GPIO peripheral.
  *              All port bits are not necessarily available on all GPIOs.
  * @param GPIO_Pin Specifies the pins to be toggled.
  * @retval None
  */
void GPIO_TogglePin(GPIO_Module *GPIOx, uint16_t Pin)
{
	/* Check the parameters */
	assert_param(IS_GPIO_PIN_AVAILABLE(GPIOx, Pin));
	
	GPIOx->POD ^= Pin;
}

/**
 * @brief  Locks GPIO Pins configuration registers.
 * @param GPIOx where x can be (A,B,C,D,F) to select the GPIO peripheral.
 * @param Pin specifies the port bit to be written.
 *   This parameter can be any combination of GPIO_Pin_x where x can be (0..15).
 */
void GPIO_ConfigPinLock(GPIO_Module* GPIOx, uint16_t Pin)
{
    uint32_t tmp = 0x00010000;

    /* Check the parameters */
    assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
	assert_param(IS_GPIO_PIN_AVAILABLE(GPIOx, Pin));

    tmp |= Pin;
    /* Set LCKK bit */
    GPIOx->PLOCK = tmp;
    /* Reset LCKK bit */
    GPIOx->PLOCK = Pin;
    /* Set LCKK bit */
    GPIOx->PLOCK = tmp;
    /* Read LCKK bit*/
    tmp = GPIOx->PLOCK;
    /* Read LCKK bit*/
    tmp = GPIOx->PLOCK;
}

/**
 * @brief  Selects the GPIO pin used as EXTI Line.
 * @param PortSource selects the GPIO port to be used as source for EXTI lines.
 *   This parameter can be GPIO_PortSourceGPIOx where x can be (A..D).
 * @param PinSource specifies the EXTI line to be configured.
 *   This parameter can be GPIO_PinSourcex where x can be (0..15).
 */
void GPIO_ConfigEXTILine(uint8_t PortSource, uint8_t PinSource)
{
	uint32_t port = (uint32_t)PortSource;

    /* Check the parameters */
    assert_param(IS_GPIO_EXTI_PORT_SOURCE(PortSource));
    assert_param(IS_GPIO_PIN_SOURCE(PinSource));
	
    AFIO->EXTI_CFG[(PinSource >> 0x02)] &= ~(0x0FUL << ((PinSource & 0x03U) * 4U));
    AFIO->EXTI_CFG[(PinSource >> 0x02)] |= (port << ((PinSource & 0x03U) * 4U));
}

/**
 * @brief  Changes the mapping of the specified pin.
 * @param PortSource selects the GPIO port to be used.
 * @param PinSource specifies the pin for the remaping.
 *   This parameter can be GPIO_PinSourcex where x can be (0..15).
 * @param AlternateFunction specifies the alternate function for the remaping.
 */
void GPIO_ConfigPinRemap(uint8_t PortSource, uint8_t PinSource, uint32_t AlternateFunction)
{
    uint32_t tmp = 0x00, tmpregister = 0x00;
    GPIO_Module *GPIOx;
    /* Check the parameters */
	assert_param(IS_GPIO_REMAP_PORT_SOURCE(PortSource));
    assert_param(IS_GPIO_PIN_SOURCE(PinSource));
    assert_param(IS_GPIO_AF(AlternateFunction));
	/*Get Peripheral point*/
	GPIOx = GPIO_GET_PERIPH(PortSource);
	/**/
	 if(PinSource & (uint8_t)0x08)
	{
	    tmp = (uint32_t)(PinSource & (uint8_t)0x07);
		/*Read GPIO_AFH register*/
		tmpregister  = GPIOx->AFH;
		/*Reset corresponding bits*/
		tmpregister &=~((uint32_t)0x0F <<(tmp*4U));
		/*Set corresponding bits*/
	    tmpregister |= ((uint32_t)(AlternateFunction) << (tmp * 4U));
		/*Write to the GPIO_AFH register*/
		GPIOx->AFH = tmpregister;
	}
	else
	{
	    tmp = (uint32_t)(PinSource & (uint8_t)0x07);
		/*Read GPIO_AFL register*/
		tmpregister  = GPIOx->AFL;
		/*Reset corresponding bits*/
		tmpregister &=~((uint32_t)0x0F <<(tmp*4U));
		/*Set corresponding bits*/
	    tmpregister |= ((uint32_t)(AlternateFunction) << (tmp * 4U));
		/*Write to the GPIO_AFL register*/
		GPIOx->AFL = tmpregister;
	}
}


/**
 * @brief  Selects the alternate function SPIx NSS mode.
 * @param AFIO_SPIx_NSS choose which SPI configuration.
 *   This parameter can be AFIO_SPI1_NSS, AFIO_SPI2_NSS.
 * @param SpiNssMode specifies the SPI_NSS mode to be configured.
 *   This parameter can be AFIO_SPI_NSS_High_IMPEDANCE and AFIO_SPI_NSS_High_LEVEL.
 */
void AFIO_ConfigSPINSSMode(uint32_t AFIO_SPIx_NSS, uint32_t SpiNssMode)
{
	uint32_t tmpregister = 0x00U;

	/* Check the parameters */
	assert_param(IS_AFIO_SPIX(AFIO_SPIx_NSS));
	assert_param(IS_AFIO_SPI_NSS(SpiNssMode));

	tmpregister = AFIO->CFG;	
	if(SpiNssMode != AFIO_SPI_NSS_High_IMPEDANCE)
	{
		tmpregister |= AFIO_SPIx_NSS;
	}
	else 
	{
		tmpregister &= ~AFIO_SPIx_NSS;
	}	
	AFIO->CFG = tmpregister;
}

/**
 * @brief  Configur ADC external trigger.
 * @param ADCETRType choose whether to configure rule conversion or injection conversion .
 *   This parameter can be AFIO_ADC_ETRI and AFIO_ADC_ETRR.
 * @param ADCTrigRemap specifies the external trigger line be configured.
 *   This parameter can be AFIO_ADC_TRIG_EXTI_x where x can be (0..15) or AFIO_ADC_TRIG_TIM8_CHy where y can be(3..4).
 */
void AFIO_ConfigADCExternalTrigRemap(AFIO_ADC_ETRType ADCETRType, AFIO_ADC_Trig_RemapType ADCTrigRemap)
{
	uint32_t tmpregister = 0x00U;

	/* Check the parameters */
	assert_param(IS_AFIO_ADC_ETR(ADCETRType));

	if(ADCETRType == AFIO_ADC_ETRI)
	{
		/* Check the parameters */
		assert_param(IS_AFIO_ADC_ETRI(ADCTrigRemap));

		tmpregister = AFIO->CFG;

		/* clear AFIO_CFG register ETRI bit*/
		tmpregister &= ~AFIO_CFG_ADC_ETRI;
		/* if ADCETRType is AFIO_ADC_ETRI then ADCTrigRemap cannot be AFIO_ADC_TRIG_TIM8_CH3*/
		if(ADCTrigRemap == AFIO_ADC_TRIG_TIM8_CH4)
		{
			/* select TIM8_CH4 line to connect*/
			tmpregister |= AFIO_CFG_ADC_ETRI;
		}
		else
		{
			/* clear AFIO_CFG register EXTI_ETRI bit*/
			tmpregister &= ~AFIO_CFG_EXTI_ETRI;
			/* select which external line is connected*/
			tmpregister |= (ADCTrigRemap << 15U);
		}
		AFIO->CFG = tmpregister;
	}
	else
	{
		if(ADCETRType == AFIO_ADC_ETRR)
		{
			/* Check the parameters */
			assert_param(IS_AFIO_ADC_ETRR(ADCTrigRemap));

			tmpregister = AFIO->CFG;
			/* clear AFIO_CFG register ETRR bit*/
			tmpregister &= ~AFIO_CFG_ADC_ETRR;
			/* if ADCETRType is AFIO_ADC_ETRR then ADCTrigRemap cannot be AFIO_ADC_TRIG_TIM8_CH4*/
			if(ADCTrigRemap == AFIO_ADC_TRIG_TIM8_TRGO)
			{
				/* select TIM8_CH3 line to connect*/
				tmpregister |= AFIO_CFG_ADC_ETRR;
			}
			else
			{
				/* clear AFIO_CFG register EXTI_ETRR bit*/
				tmpregister &= ~AFIO_CFG_EXTI_ETRR;
				/* select which external line is connected*/
				tmpregister |= (ADCTrigRemap << 11U);
			}
			AFIO->CFG = tmpregister;
		}
	}
}

/**
 * @}
 */

/**
 * @}
 */
