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rt-thread/bsp/gd32vf103v-eval/libraries/GD32VF103_standard_peripheral/Source/gd32vf103_dma.c

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first version
2019-07-24 17:03:26 +08:00
/*!
\file gd32vf103_dma.c
\brief DMA driver
\version 2019-6-5, V1.0.0, firmware for GD32VF103
*/
/*
Copyright (c) 2019, 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 "gd32vf103_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 and priority */
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
\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, uint32_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;
if(RESET != (DMA_INTF(dma_periph) & DMA_FLAG_ADD(flag, channelx))){
reval = SET;
}else{
reval = RESET;
}
return reval;
}
/*!
\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_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 none
*/
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;
}