/*!
    \file    gd32f10x_dma.c
    \brief   DMA driver

    \version 2014-12-26, V1.0.0, firmware for GD32F10x
    \version 2017-06-20, V2.0.0, firmware for GD32F10x
    \version 2018-07-31, V2.1.0, firmware for GD32F10x
    \version 2019-10-30, V2.1.1, firmware for GD32F10x
    \version 2020-09-30, V2.2.0, firmware for GD32F10x
*/

/*
    Copyright (c) 2020, GigaDevice Semiconductor Inc.

    Redistribution and use in source and binary forms, with or without modification, 
are permitted provided that the following conditions are met:

    1. Redistributions of source code must retain the above copyright notice, this 
       list of conditions and the following disclaimer.
    2. Redistributions in binary form must reproduce the above copyright notice, 
       this list of conditions and the following disclaimer in the documentation 
       and/or other materials provided with the distribution.
    3. Neither the name of the copyright holder nor the names of its contributors 
       may be used to endorse or promote products derived from this software without 
       specific prior written permission.

    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS 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.
*/

#include "gd32f10x_dma.h"

#define DMA_WRONG_HANDLE        while(1){}

  /* check whether peripheral matches channels or not */
static ErrStatus dma_periph_and_channel_check(uint32_t dma_periph, dma_channel_enum channelx);

/*!
    \brief      deinitialize DMA a channel registers 
    \param[in]  dma_periph: DMAx(x=0,1)
      \arg        DMAx(x=0,1)
    \param[in]  channelx: specify which DMA channel is deinitialized
                only one parameter can be selected which is shown as below:
      \arg        DMA0: DMA_CHx(x=0..6), DMA1: DMA_CHx(x=0..4)
    \param[out] none
    \retval     none
*/
void dma_deinit(uint32_t dma_periph, dma_channel_enum channelx)
{
    if(ERROR == dma_periph_and_channel_check(dma_periph, channelx)){
        DMA_WRONG_HANDLE
    }
    
    /* disable DMA a channel */
    DMA_CHCTL(dma_periph, channelx) &= ~DMA_CHXCTL_CHEN;
    /* reset DMA channel registers */
    DMA_CHCTL(dma_periph, channelx) = DMA_CHCTL_RESET_VALUE;
    DMA_CHCNT(dma_periph, channelx) = DMA_CHCNT_RESET_VALUE;
    DMA_CHPADDR(dma_periph, channelx) = DMA_CHPADDR_RESET_VALUE;
    DMA_CHMADDR(dma_periph, channelx) = DMA_CHMADDR_RESET_VALUE;
    DMA_INTC(dma_periph) |= DMA_FLAG_ADD(DMA_CHINTF_RESET_VALUE, channelx);
}

/*!
    \brief      initialize the parameters of DMA struct with the default values
    \param[in]  init_struct: the initialization data needed to initialize DMA channel
    \param[out] none
    \retval     none
*/
void dma_struct_para_init(dma_parameter_struct* init_struct)
{
    /* set the DMA struct with the default values */
    init_struct->periph_addr  = 0U;
    init_struct->periph_width = 0U; 
    init_struct->periph_inc   = DMA_PERIPH_INCREASE_DISABLE;
    init_struct->memory_addr  = 0U;
    init_struct->memory_width = 0U;
    init_struct->memory_inc   = DMA_MEMORY_INCREASE_DISABLE;
    init_struct->number       = 0U;
    init_struct->direction    = DMA_PERIPHERAL_TO_MEMORY;
    init_struct->priority     = DMA_PRIORITY_LOW;
}

/*!
    \brief      initialize DMA channel
    \param[in]  dma_periph: DMAx(x=0,1)
      \arg        DMAx(x=0,1)
    \param[in]  channelx: specify which DMA channel is initialized
                only one parameter can be selected which is shown as below:
      \arg        DMA0: DMA_CHx(x=0..6), DMA1: DMA_CHx(x=0..4)
    \param[in]  init_struct: the data needed to initialize DMA channel
                  periph_addr: peripheral base address
                  periph_width: DMA_PERIPHERAL_WIDTH_8BIT, DMA_PERIPHERAL_WIDTH_16BIT, DMA_PERIPHERAL_WIDTH_32BIT
                  periph_inc: DMA_PERIPH_INCREASE_ENABLE, DMA_PERIPH_INCREASE_DISABLE 
                  memory_addr: memory base address
                  memory_width: DMA_MEMORY_WIDTH_8BIT, DMA_MEMORY_WIDTH_16BIT, DMA_MEMORY_WIDTH_32BIT
                  memory_inc: DMA_MEMORY_INCREASE_ENABLE, DMA_MEMORY_INCREASE_DISABLE
                  direction: DMA_PERIPHERAL_TO_MEMORY, DMA_MEMORY_TO_PERIPHERAL
                  number: the number of remaining data to be transferred by the DMA
                  priority: DMA_PRIORITY_LOW, DMA_PRIORITY_MEDIUM, DMA_PRIORITY_HIGH, DMA_PRIORITY_ULTRA_HIGH
    \param[out] none
    \retval     none
*/
void dma_init(uint32_t dma_periph, dma_channel_enum channelx, dma_parameter_struct *init_struct)
{
    uint32_t ctl;
    
    if(ERROR == dma_periph_and_channel_check(dma_periph, channelx)){
        DMA_WRONG_HANDLE
    }
    
    /* configure peripheral base address */
    DMA_CHPADDR(dma_periph, channelx) = init_struct->periph_addr;
    
    /* configure memory base address */
    DMA_CHMADDR(dma_periph, channelx) = init_struct->memory_addr;
    
    /* configure the number of remaining data to be transferred */
    DMA_CHCNT(dma_periph, channelx) = (init_struct->number & DMA_CHANNEL_CNT_MASK);
    
    /* configure peripheral transfer width,memory transfer width, */
    ctl = DMA_CHCTL(dma_periph, channelx);
    ctl &= ~(DMA_CHXCTL_PWIDTH | DMA_CHXCTL_MWIDTH | DMA_CHXCTL_PRIO);
    ctl |= (init_struct->periph_width | init_struct->memory_width | init_struct->priority);
    DMA_CHCTL(dma_periph, channelx) = ctl;

    /* configure peripheral increasing mode */
    if(DMA_PERIPH_INCREASE_ENABLE == init_struct->periph_inc){
        DMA_CHCTL(dma_periph, channelx) |= DMA_CHXCTL_PNAGA;
    }else{
        DMA_CHCTL(dma_periph, channelx) &= ~DMA_CHXCTL_PNAGA;
    }

    /* configure memory increasing mode */
    if(DMA_MEMORY_INCREASE_ENABLE == init_struct->memory_inc){
        DMA_CHCTL(dma_periph, channelx) |= DMA_CHXCTL_MNAGA;
    }else{
        DMA_CHCTL(dma_periph, channelx) &= ~DMA_CHXCTL_MNAGA;
    }
    
    /* configure the direction of  data transfer */
    if(DMA_PERIPHERAL_TO_MEMORY == init_struct->direction){
        DMA_CHCTL(dma_periph, channelx) &= ~DMA_CHXCTL_DIR;
    }else{
        DMA_CHCTL(dma_periph, channelx) |= DMA_CHXCTL_DIR;
    } 
}

/*!
    \brief      enable DMA circulation mode  
    \param[in]  dma_periph: DMAx(x=0,1)
      \arg        DMAx(x=0,1)
    \param[in]  channelx: specify which DMA channel
                only one parameter can be selected which is shown as below:
      \arg        DMA0: DMA_CHx(x=0..6), DMA1: DMA_CHx(x=0..4)
    \param[out] none
    \retval     none 
*/
void dma_circulation_enable(uint32_t dma_periph, dma_channel_enum channelx)
{
    if(ERROR == dma_periph_and_channel_check(dma_periph, channelx)){
        DMA_WRONG_HANDLE
    }

    DMA_CHCTL(dma_periph, channelx) |= DMA_CHXCTL_CMEN;
}

/*!
    \brief      disable DMA circulation mode  
    \param[in]  dma_periph: DMAx(x=0,1)
      \arg        DMAx(x=0,1)
    \param[in]  channelx: specify which DMA channel 
                only one parameter can be selected which is shown as below:
      \arg        DMA0: DMA_CHx(x=0..6), DMA1: DMA_CHx(x=0..4)
    \param[out] none
    \retval     none 
*/
void dma_circulation_disable(uint32_t dma_periph, dma_channel_enum channelx)
{
    if(ERROR == dma_periph_and_channel_check(dma_periph, channelx)){
        DMA_WRONG_HANDLE
    }
    
    DMA_CHCTL(dma_periph, channelx) &= ~DMA_CHXCTL_CMEN;
}

/*!
    \brief      enable memory to memory mode
    \param[in]  dma_periph: DMAx(x=0,1)
      \arg        DMAx(x=0,1)
    \param[in]  channelx: specify which DMA channel 
                only one parameter can be selected which is shown as below:
      \arg        DMA0: DMA_CHx(x=0..6), DMA1: DMA_CHx(x=0..4)
    \param[out] none
    \retval     none
*/
void dma_memory_to_memory_enable(uint32_t dma_periph, dma_channel_enum channelx)
{
    if(ERROR == dma_periph_and_channel_check(dma_periph, channelx)){
        DMA_WRONG_HANDLE
    }
    
    DMA_CHCTL(dma_periph, channelx) |= DMA_CHXCTL_M2M;
}

/*!
    \brief      disable memory to memory mode
    \param[in]  dma_periph: DMAx(x=0,1)
      \arg        DMAx(x=0,1)
    \param[in]  channelx: specify which DMA channel
                only one parameter can be selected which is shown as below:
      \arg        DMA0: DMA_CHx(x=0..6), DMA1: DMA_CHx(x=0..4)
    \param[out] none
    \retval     none
*/
void dma_memory_to_memory_disable(uint32_t dma_periph, dma_channel_enum channelx)
{
    if(ERROR == dma_periph_and_channel_check(dma_periph, channelx)){
        DMA_WRONG_HANDLE
    }
    
    DMA_CHCTL(dma_periph, channelx) &= ~DMA_CHXCTL_M2M;
}

/*!
    \brief      enable DMA channel 
    \param[in]  dma_periph: DMAx(x=0,1)
      \arg        DMAx(x=0,1)
    \param[in]  channelx: specify which DMA channel
                only one parameter can be selected which is shown as below:
      \arg        DMA0: DMA_CHx(x=0..6), DMA1: DMA_CHx(x=0..4)
    \param[out] none
    \retval     none 
*/
void dma_channel_enable(uint32_t dma_periph, dma_channel_enum channelx)
{
    if(ERROR == dma_periph_and_channel_check(dma_periph, channelx)){
        DMA_WRONG_HANDLE
    }
    
    DMA_CHCTL(dma_periph, channelx) |= DMA_CHXCTL_CHEN;
}

/*!
    \brief      disable DMA channel 
    \param[in]  dma_periph: DMAx(x=0,1)
      \arg        DMAx(x=0,1)
    \param[in]  channelx: specify which DMA channel
                only one parameter can be selected which is shown as below:
      \arg        DMA0: DMA_CHx(x=0..6), DMA1: DMA_CHx(x=0..4)
    \param[out] none
    \retval     none 
*/
void dma_channel_disable(uint32_t dma_periph, dma_channel_enum channelx)
{
    if(ERROR == dma_periph_and_channel_check(dma_periph, channelx)){
        DMA_WRONG_HANDLE
    }
    
    DMA_CHCTL(dma_periph, channelx) &= ~DMA_CHXCTL_CHEN;
}

/*!
    \brief      set DMA peripheral base address  
    \param[in]  dma_periph: DMAx(x=0,1)
      \arg        DMAx(x=0,1)
    \param[in]  channelx: specify which DMA channel to set peripheral base address
                only one parameter can be selected which is shown as below:
      \arg        DMA0: DMA_CHx(x=0..6), DMA1: DMA_CHx(x=0..4)
    \param[in]  address: peripheral base address
    \param[out] none
    \retval     none 
*/
void dma_periph_address_config(uint32_t dma_periph, dma_channel_enum channelx, uint32_t address)
{
    if(ERROR == dma_periph_and_channel_check(dma_periph, channelx)){
        DMA_WRONG_HANDLE
    }
    
    DMA_CHPADDR(dma_periph, channelx) = address;
}

/*!
    \brief      set DMA memory base address  
    \param[in]  dma_periph: DMAx(x=0,1)
      \arg        DMAx(x=0,1)
    \param[in]  channelx: specify which DMA channel to set memory base address
                only one parameter can be selected which is shown as below:
      \arg        DMA0: DMA_CHx(x=0..6), DMA1: DMA_CHx(x=0..4)
    \param[in]  address: memory base address
    \param[out] none
    \retval     none 
*/
void dma_memory_address_config(uint32_t dma_periph, dma_channel_enum channelx, uint32_t address)
{
    if(ERROR == dma_periph_and_channel_check(dma_periph, channelx)){
        DMA_WRONG_HANDLE
    }
    
    DMA_CHMADDR(dma_periph, channelx) = address;
}

/*!
    \brief      set the number of remaining data to be transferred by the DMA 
    \param[in]  dma_periph: DMAx(x=0,1)
      \arg        DMAx(x=0,1)
    \param[in]  channelx: specify which DMA channel to set number
                only one parameter can be selected which is shown as below:
      \arg        DMA0: DMA_CHx(x=0..6), DMA1: DMA_CHx(x=0..4)
    \param[in]  number: the number of remaining data to be transferred by the DMA
      \arg        0x0000-0xFFFF
    \param[out] none
    \retval     none 
*/
void dma_transfer_number_config(uint32_t dma_periph, dma_channel_enum channelx, uint32_t number)
{
    if(ERROR == dma_periph_and_channel_check(dma_periph, channelx)){
        DMA_WRONG_HANDLE
    }
    
    DMA_CHCNT(dma_periph, channelx) = (number & DMA_CHANNEL_CNT_MASK);
}

/*!
    \brief      get the number of remaining data to be transferred by the DMA  
    \param[in]  dma_periph: DMAx(x=0,1)
      \arg        DMAx(x=0,1)
    \param[in]  channelx: specify which DMA channel to set number 
                only one parameter can be selected which is shown as below:
      \arg        DMA0: DMA_CHx(x=0..6), DMA1: DMA_CHx(x=0..4)
    \param[out] none
    \retval     uint32_t: the number of remaining data to be transferred by the DMA 
*/
uint32_t dma_transfer_number_get(uint32_t dma_periph, dma_channel_enum channelx)
{
    if(ERROR == dma_periph_and_channel_check(dma_periph, channelx)){
        DMA_WRONG_HANDLE
    }
    
    return (uint32_t)DMA_CHCNT(dma_periph, channelx);
}

/*!
    \brief      configure priority level of DMA channel 
    \param[in]  dma_periph: DMAx(x=0,1)
      \arg        DMAx(x=0,1)
    \param[in]  channelx: specify which DMA channel
                only one parameter can be selected which is shown as below:
      \arg        DMA0: DMA_CHx(x=0..6), DMA1: DMA_CHx(x=0..4)
    \param[in]  priority: priority Level of this channel
                only one parameter can be selected which is shown as below:
      \arg        DMA_PRIORITY_LOW: low priority
      \arg        DMA_PRIORITY_MEDIUM: medium priority
      \arg        DMA_PRIORITY_HIGH: high priority
      \arg        DMA_PRIORITY_ULTRA_HIGH: ultra high priority
    \param[out] none
    \retval     none 
*/
void dma_priority_config(uint32_t dma_periph, dma_channel_enum channelx, uint32_t priority)
{
    uint32_t ctl;
    
    if(ERROR == dma_periph_and_channel_check(dma_periph, channelx)){
        DMA_WRONG_HANDLE
    }
    
    /* acquire DMA_CHxCTL register */
    ctl = DMA_CHCTL(dma_periph, channelx);
    /* assign regiser */
    ctl &= ~DMA_CHXCTL_PRIO;
    ctl |= priority;
    DMA_CHCTL(dma_periph, channelx) = ctl;
}

/*!
    \brief      configure transfer data size of memory 
    \param[in]  dma_periph: DMAx(x=0,1)
      \arg        DMAx(x=0,1)
    \param[in]  channelx: specify which DMA channel
                only one parameter can be selected which is shown as below:
      \arg        DMA0: DMA_CHx(x=0..6), DMA1: DMA_CHx(x=0..4)
    \param[in]  mwidth: transfer data width of memory
                only one parameter can be selected which is shown as below:
      \arg        DMA_MEMORY_WIDTH_8BIT: transfer data width of memory is 8-bit
      \arg        DMA_MEMORY_WIDTH_16BIT: transfer data width of memory is 16-bit
      \arg        DMA_MEMORY_WIDTH_32BIT: transfer data width of memory is 32-bit
    \param[out] none
    \retval     none
*/
void dma_memory_width_config(uint32_t dma_periph, dma_channel_enum channelx, uint32_t mwidth)
{
    uint32_t ctl;
    
    if(ERROR == dma_periph_and_channel_check(dma_periph, channelx)){
        DMA_WRONG_HANDLE
    }
    
    /* acquire DMA_CHxCTL register */
    ctl = DMA_CHCTL(dma_periph, channelx);
    /* assign regiser */
    ctl &= ~DMA_CHXCTL_MWIDTH;
    ctl |= mwidth;
    DMA_CHCTL(dma_periph, channelx) = ctl;
}

/*!
    \brief      configure transfer data size of peripheral 
    \param[in]  dma_periph: DMAx(x=0,1)
      \arg        DMAx(x=0,1)
    \param[in]  channelx: specify which DMA channel
                only one parameter can be selected which is shown as below:
      \arg        DMA0: DMA_CHx(x=0..6), DMA1: DMA_CHx(x=0..4)
    \param[in]  pwidth: transfer data width of peripheral
                only one parameter can be selected which is shown as below:
      \arg        DMA_PERIPHERAL_WIDTH_8BIT: transfer data width of peripheral is 8-bit
      \arg        DMA_PERIPHERAL_WIDTH_16BIT: transfer data width of peripheral is 16-bit
      \arg        DMA_PERIPHERAL_WIDTH_32BIT: transfer data width of peripheral is 32-bit
    \param[out] none
    \retval     none
*/
void dma_periph_width_config(uint32_t dma_periph, dma_channel_enum channelx, uint32_t pwidth)
{
    uint32_t ctl;
    
    if(ERROR == dma_periph_and_channel_check(dma_periph, channelx)){
        DMA_WRONG_HANDLE
    }
    
    /* acquire DMA_CHxCTL register */
    ctl = DMA_CHCTL(dma_periph, channelx);
    /* assign regiser */
    ctl &= ~DMA_CHXCTL_PWIDTH;
    ctl |= pwidth;
    DMA_CHCTL(dma_periph, channelx) = ctl;
}

/*!
    \brief      enable next address increasement algorithm of memory  
    \param[in]  dma_periph: DMAx(x=0,1)
      \arg        DMAx(x=0,1)
    \param[in]  channelx: specify which DMA channel
                only one parameter can be selected which is shown as below:
      \arg        DMA0: DMA_CHx(x=0..6), DMA1: DMA_CHx(x=0..4)
    \param[out] none
    \retval     none
*/
void dma_memory_increase_enable(uint32_t dma_periph, dma_channel_enum channelx)
{
    if(ERROR == dma_periph_and_channel_check(dma_periph, channelx)){
        DMA_WRONG_HANDLE
    }
    
    DMA_CHCTL(dma_periph, channelx) |= DMA_CHXCTL_MNAGA;
}

/*!
    \brief      disable next address increasement algorithm of memory  
    \param[in]  dma_periph: DMAx(x=0,1)
      \arg        DMAx(x=0,1)
    \param[in]  channelx: specify which DMA channel
                only one parameter can be selected which is shown as below:
      \arg        DMA0: DMA_CHx(x=0..6), DMA1: DMA_CHx(x=0..4)
    \param[out] none
    \retval     none
*/
void dma_memory_increase_disable(uint32_t dma_periph, dma_channel_enum channelx)
{
    if(ERROR == dma_periph_and_channel_check(dma_periph, channelx)){
        DMA_WRONG_HANDLE
    }
    
    DMA_CHCTL(dma_periph, channelx) &= ~DMA_CHXCTL_MNAGA;
}

/*!
    \brief      enable next address increasement algorithm of peripheral
    \param[in]  dma_periph: DMAx(x=0,1)
      \arg        DMAx(x=0,1)
    \param[in]  channelx: specify which DMA channel
                only one parameter can be selected which is shown as below:
      \arg        DMA0: DMA_CHx(x=0..6), DMA1: DMA_CHx(x=0..4)
    \param[out] none
    \retval     none
*/
void dma_periph_increase_enable(uint32_t dma_periph, dma_channel_enum channelx)
{
    if(ERROR == dma_periph_and_channel_check(dma_periph, channelx)){
        DMA_WRONG_HANDLE
    }
    
    DMA_CHCTL(dma_periph, channelx) |= DMA_CHXCTL_PNAGA;
}

/*!
    \brief      disable next address increasement algorithm of peripheral 
    \param[in]  dma_periph: DMAx(x=0,1)
      \arg        DMAx(x=0,1)
    \param[in]  channelx: specify which DMA channel
                only one parameter can be selected which is shown as below:
      \arg        DMA0: DMA_CHx(x=0..6), DMA1: DMA_CHx(x=0..4)
    \param[out] none
    \retval     none
*/
void dma_periph_increase_disable(uint32_t dma_periph, dma_channel_enum channelx)
{
    if(ERROR == dma_periph_and_channel_check(dma_periph, channelx)){
        DMA_WRONG_HANDLE
    }
    
    DMA_CHCTL(dma_periph, channelx) &= ~DMA_CHXCTL_PNAGA;
}

/*!
    \brief      configure the direction of data transfer on the channel  
    \param[in]  dma_periph: DMAx(x=0,1)
      \arg        DMAx(x=0,1)
    \param[in]  channelx: specify which DMA channel
                only one parameter can be selected which is shown as below:
      \arg        DMA0: DMA_CHx(x=0..6), DMA1: DMA_CHx(x=0..4)
    \param[in]  direction: specify the direction of data transfer
                only one parameter can be selected which is shown as below:
      \arg        DMA_PERIPHERAL_TO_MEMORY: read from peripheral and write to memory
      \arg        DMA_MEMORY_TO_PERIPHERAL: read from memory and write to peripheral
    \param[out] none
    \retval     none
*/
void dma_transfer_direction_config(uint32_t dma_periph, dma_channel_enum channelx, uint8_t direction)
{
    if(ERROR == dma_periph_and_channel_check(dma_periph, channelx)){
        DMA_WRONG_HANDLE
    }
    
    if(DMA_PERIPHERAL_TO_MEMORY == direction){
        DMA_CHCTL(dma_periph, channelx) &= ~DMA_CHXCTL_DIR;
    } else {
        DMA_CHCTL(dma_periph, channelx) |= DMA_CHXCTL_DIR;
    }
}

/*!
    \brief      check DMA flag is set or not 
    \param[in]  dma_periph: DMAx(x=0,1)
      \arg        DMAx(x=0,1)
    \param[in]  channelx: specify which DMA channel to get flag
                only one parameter can be selected which is shown as below:
      \arg        DMA0: DMA_CHx(x=0..6), DMA1: DMA_CHx(x=0..4)
    \param[in]  flag: specify get which flag
                only one parameter can be selected which is shown as below:
      \arg        DMA_FLAG_G: global interrupt flag of channel
      \arg        DMA_FLAG_FTF: full transfer finish flag of channel
      \arg        DMA_FLAG_HTF: half transfer finish flag of channel
      \arg        DMA_FLAG_ERR: error flag of channel
    \param[out] none
    \retval     FlagStatus: SET or RESET
*/
FlagStatus dma_flag_get(uint32_t dma_periph, dma_channel_enum channelx, uint32_t flag)
{
    FlagStatus reval;

    /* check whether the flag is set or not */
    if(RESET != (DMA_INTF(dma_periph) & DMA_FLAG_ADD(flag, channelx))){
        reval = SET;
    }else{
        reval = RESET;
    }
    
    return reval;
}

/*!
    \brief      clear the flag of a DMA channel
    \param[in]  dma_periph: DMAx(x=0,1)
      \arg        DMAx(x=0,1)
    \param[in]  channelx: specify which DMA channel to clear flag
                only one parameter can be selected which is shown as below:
      \arg        DMA0: DMA_CHx(x=0..6), DMA1: DMA_CHx(x=0..4)
    \param[in]  flag: specify get which flag
                only one parameter can be selected which is shown as below:
      \arg        DMA_FLAG_G: global interrupt flag of channel
      \arg        DMA_FLAG_FTF: full transfer finish flag of channel
      \arg        DMA_FLAG_HTF: half transfer finish flag of channel
      \arg        DMA_FLAG_ERR: error flag of channel
    \param[out] none
    \retval     none
*/
void dma_flag_clear(uint32_t dma_periph, dma_channel_enum channelx, uint32_t flag)
{
    DMA_INTC(dma_periph) |= DMA_FLAG_ADD(flag, channelx);
}

/*!
    \brief      check DMA flag and interrupt enable bit is set or not 
    \param[in]  dma_periph: DMAx(x=0,1)
      \arg        DMAx(x=0,1)
    \param[in]  channelx: specify which DMA channel to get flag
                only one parameter can be selected which is shown as below:
      \arg        DMA0: DMA_CHx(x=0..6), DMA1: DMA_CHx(x=0..4)
    \param[in]  flag: specify get which flag
                only one parameter can be selected which is shown as below:
      \arg        DMA_INT_FLAG_FTF: full transfer finish interrupt flag of channel
      \arg        DMA_INT_FLAG_HTF: half transfer finish interrupt flag of channel
      \arg        DMA_INT_FLAG_ERR: error interrupt flag of channel
    \param[out] none
    \retval     FlagStatus: SET or RESET
*/
FlagStatus dma_interrupt_flag_get(uint32_t dma_periph, dma_channel_enum channelx, uint32_t flag)
{
    uint32_t interrupt_enable = 0U, interrupt_flag = 0U;
    
    switch(flag){
        case DMA_INT_FLAG_FTF:
            /* check whether the full transfer finish interrupt flag is set and enabled */
            interrupt_flag = DMA_INTF(dma_periph) & DMA_FLAG_ADD(flag, channelx);
            interrupt_enable = DMA_CHCTL(dma_periph, channelx) & DMA_CHXCTL_FTFIE;
            break;
        case DMA_INT_FLAG_HTF:
            /* check whether the half transfer finish interrupt flag is set and enabled */
            interrupt_flag = DMA_INTF(dma_periph) & DMA_FLAG_ADD(flag, channelx);
            interrupt_enable = DMA_CHCTL(dma_periph, channelx) & DMA_CHXCTL_HTFIE;
            break;
        case DMA_INT_FLAG_ERR:
            /* check whether the error interrupt flag is set and enabled */
            interrupt_flag = DMA_INTF(dma_periph) & DMA_FLAG_ADD(flag, channelx);
            interrupt_enable = DMA_CHCTL(dma_periph, channelx) & DMA_CHXCTL_ERRIE;
            break;
        default:
            DMA_WRONG_HANDLE
        }
    
    /* when the interrupt flag is set and enabled, return SET */    
    if(interrupt_flag && interrupt_enable){
        return SET;
    }else{
        return RESET;
    }
}

/*!
    \brief      clear DMA a channel flag
    \param[in]  dma_periph: DMAx(x=0,1)
      \arg        DMAx(x=0,1)
    \param[in]  channelx: specify which DMA channel to clear flag
                only one parameter can be selected which is shown as below:
      \arg        DMA0: DMA_CHx(x=0..6), DMA1: DMA_CHx(x=0..4)
    \param[in]  flag: specify get which flag
                only one parameter can be selected which is shown as below:
      \arg        DMA_INT_FLAG_G: global interrupt flag of channel
      \arg        DMA_INT_FLAG_FTF: full transfer finish interrupt flag of channel
      \arg        DMA_INT_FLAG_HTF: half transfer finish interrupt flag of channel
      \arg        DMA_INT_FLAG_ERR: error interrupt flag of channel
    \param[out] none
    \retval     none
*/
void dma_interrupt_flag_clear(uint32_t dma_periph, dma_channel_enum channelx, uint32_t flag)
{
    DMA_INTC(dma_periph) |= DMA_FLAG_ADD(flag, channelx);
}

/*!
    \brief      enable DMA interrupt
    \param[in]  dma_periph: DMAx(x=0,1)
      \arg        DMAx(x=0,1)
    \param[in]  channelx: specify which DMA channel 
                only one parameter can be selected which is shown as below:
      \arg        DMA0: DMA_CHx(x=0..6), DMA1: DMA_CHx(x=0..4)
    \param[in]  source: specify which interrupt to enbale
                one or more parameters can be selected which are shown as below
      \arg        DMA_INT_FTF: channel full transfer finish interrupt
      \arg        DMA_INT_HTF: channel half transfer finish interrupt
      \arg        DMA_INT_ERR: channel error interrupt
    \param[out] none
    \retval     none
*/
void dma_interrupt_enable(uint32_t dma_periph, dma_channel_enum channelx, uint32_t source)
{
    if(ERROR == dma_periph_and_channel_check(dma_periph, channelx)){
        DMA_WRONG_HANDLE
    }
    
    DMA_CHCTL(dma_periph, channelx) |= source;
}

/*!
    \brief      disable DMA interrupt
    \param[in]  dma_periph: DMAx(x=0,1)
      \arg        DMAx(x=0,1)
    \param[in]  channelx: specify which DMA channel
                only one parameter can be selected which is shown as below:
      \arg        DMA0: DMA_CHx(x=0..6), DMA1: DMA_CHx(x=0..4)
    \param[in]  source: specify which interrupt to disbale
                one or more parameters can be selected which are shown as below
      \arg        DMA_INT_FTF: channel full transfer finish interrupt
      \arg        DMA_INT_HTF: channel half transfer finish interrupt
      \arg        DMA_INT_ERR: channel error interrupt
    \param[out] none
    \retval     none
*/
void dma_interrupt_disable(uint32_t dma_periph, dma_channel_enum channelx, uint32_t source)
{
    if(ERROR == dma_periph_and_channel_check(dma_periph, channelx)){
        DMA_WRONG_HANDLE
    }
    
    DMA_CHCTL(dma_periph, channelx) &= ~source;
}

/*!
    \brief      check whether peripheral and channels match
    \param[in]  dma_periph: DMAx(x=0,1)
      \arg        DMAx(x=0,1)
    \param[in]  channelx: specify which DMA channel
                only one parameter can be selected which is shown as below:
      \arg        DMA_CHx(x=0..6)
    \param[out] none
    \retval     ErrStatus: SUCCESS or ERROR
*/
static ErrStatus dma_periph_and_channel_check(uint32_t dma_periph, dma_channel_enum channelx)
{
    ErrStatus val = SUCCESS;
    
    if(DMA1 == dma_periph){
        /* for DMA1, the channel is from DMA_CH0 to DMA_CH4 */
        if(channelx > DMA_CH4){
            val = ERROR;
        }
    }
    
    return val;
}
