/*!
\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
\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 deinitialize DMA a channel registers
\param[in] channelx: specify which DMA channel is deinitialized
\arg DMA_CHx(x=0..6)
\param[out] none
\retval none
*/
void dma_deinit(dma_channel_enum channelx)
{
/* disable DMA a channel */
DMA_CHCTL(channelx) &= ~DMA_CHXCTL_CHEN;
/* reset DMA channel registers */
DMA_CHCTL(channelx) = DMA_CHCTL_RESET_VALUE;
DMA_CHCNT(channelx) = DMA_CHCNT_RESET_VALUE;
DMA_CHPADDR(channelx) = DMA_CHPADDR_RESET_VALUE;
DMA_CHMADDR(channelx) = DMA_CHMADDR_RESET_VALUE;
DMA_INTC |= DMA_FLAG_ADD(DMA_CHINTF_RESET_VALUE,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
\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 DMA channel
\param[in] dma_periph: DMAx(x=0,1)
\arg DMAx(x=0,1)
\param[in] channelx: specify which DMA channel is initialized
\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 set DMA Memory base address
\param[in] channelx: specify which DMA channel to set Memory base address
\arg DMA_CHx(x=0..6)
\param[in] address: Memory base address
\param[out] none
\retval none
*/
void dma_memory_address_config(dma_channel_enum channelx,uint32_t address)
{
DMA_CHMADDR(channelx) = address;
}
