Detailed Description

Direct memory access (DMA) API.

Version: 5.1.2

License

Permission is granted to anyone to use this software for any purpose, including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions:

The origin of this software must not be misrepresented; you must not claim that you wrote the original software.
Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
This notice may not be removed or altered from any source distribution.

DISCLAIMER OF WARRANTY/LIMITATION OF REMEDIES: Silicon Labs has no obligation to support this Software. Silicon Labs is providing the Software "AS IS", with no express or implied warranties of any kind, including, but not limited to, any implied warranties of merchantability or fitness for any particular purpose or warranties against infringement of any proprietary rights of a third party.

Silicon Labs will not be liable for any consequential, incidental, or special damages, or any other relief, or for any claim by any third party, arising from your use of this Software.

Definition in file em_dma.h.

#include "em_device.h"
#include <stdio.h>
#include <stdbool.h>

Go to the source code of this file.

Data Structures
struct	DMA_CB_TypeDef
	Callback structure that can be used to define DMA complete actions. More...

struct	DMA_CfgChannel_TypeDef

struct	DMA_CfgDescr_TypeDef

struct	DMA_CfgDescrSGAlt_TypeDef

struct	DMA_Init_TypeDef

Typedefs
typedef void(*	DMA_FuncPtr_TypeDef) (unsigned int channel, bool primary, void *user)
	DMA interrupt callback function pointer. More...

Enumerations
enum	DMA_ArbiterConfig_TypeDef { dmaArbitrate1 = _DMA_CTRL_R_POWER_1, dmaArbitrate2 = _DMA_CTRL_R_POWER_2, dmaArbitrate4 = _DMA_CTRL_R_POWER_4, dmaArbitrate8 = _DMA_CTRL_R_POWER_8, dmaArbitrate16 = _DMA_CTRL_R_POWER_16, dmaArbitrate32 = _DMA_CTRL_R_POWER_32, dmaArbitrate64 = _DMA_CTRL_R_POWER_64, dmaArbitrate128 = _DMA_CTRL_R_POWER_128, dmaArbitrate256 = _DMA_CTRL_R_POWER_256, dmaArbitrate512 = _DMA_CTRL_R_POWER_512, dmaArbitrate1024 = _DMA_CTRL_R_POWER_1024 }

enum	DMA_CycleCtrl_TypeDef { dmaCycleCtrlBasic = _DMA_CTRL_CYCLE_CTRL_BASIC, dmaCycleCtrlAuto = _DMA_CTRL_CYCLE_CTRL_AUTO, dmaCycleCtrlPingPong = _DMA_CTRL_CYCLE_CTRL_PINGPONG, dmaCycleCtrlMemScatterGather = _DMA_CTRL_CYCLE_CTRL_MEM_SCATTER_GATHER, dmaCycleCtrlPerScatterGather = _DMA_CTRL_CYCLE_CTRL_PER_SCATTER_GATHER }

enum	DMA_DataInc_TypeDef { dmaDataInc1 = _DMA_CTRL_SRC_INC_BYTE, dmaDataInc2 = _DMA_CTRL_SRC_INC_HALFWORD, dmaDataInc4 = _DMA_CTRL_SRC_INC_WORD, dmaDataIncNone = _DMA_CTRL_SRC_INC_NONE }

enum	DMA_DataSize_TypeDef { dmaDataSize1 = _DMA_CTRL_SRC_SIZE_BYTE, dmaDataSize2 = _DMA_CTRL_SRC_SIZE_HALFWORD, dmaDataSize4 = _DMA_CTRL_SRC_SIZE_WORD }

Functions
void	DMA_ActivateAuto (unsigned int channel, bool primary, void dst, const void src, unsigned int nMinus1)
	Activate DMA auto-request cycle (used for memory-memory transfers). More...

void	DMA_ActivateBasic (unsigned int channel, bool primary, bool useBurst, void dst, const void src, unsigned int nMinus1)
	Activate DMA basic cycle (used for memory-peripheral transfers). More...

void	DMA_ActivatePingPong (unsigned int channel, bool useBurst, void primDst, const void primSrc, unsigned int primNMinus1, void altDst, const void altSrc, unsigned int altNMinus1)
	Activate DMA ping-pong cycle (used for memory-peripheral transfers). More...

void	DMA_ActivateScatterGather (unsigned int channel, bool useBurst, DMA_DESCRIPTOR_TypeDef *altDescr, unsigned int count)
	Activate DMA scatter-gather cycle (used for either memory-peripheral or memory-memory transfers). More...

void	DMA_CfgChannel (unsigned int channel, DMA_CfgChannel_TypeDef *cfg)
	Configure a DMA channel. More...

void	DMA_CfgDescr (unsigned int channel, bool primary, DMA_CfgDescr_TypeDef *cfg)
	Configure DMA descriptor for auto-request, basic or ping-pong DMA cycles. More...

void	DMA_CfgDescrScatterGather (DMA_DESCRIPTOR_TypeDef descr, unsigned int indx, DMA_CfgDescrSGAlt_TypeDef cfg)
	Configure an alternate DMA descriptor for use with scatter-gather DMA cycles. More...

void	DMA_ChannelEnable (unsigned int channel, bool enable)
	Enable or disable a DMA channel. More...

bool	DMA_ChannelEnabled (unsigned int channel)
	Check if DMA channel is enabled. More...

void	DMA_ChannelRequestEnable (unsigned int channel, bool enable)
	Enable or disable a DMA channel request. More...

void	DMA_Init (DMA_Init_TypeDef *init)
	Initializes DMA controller. More...

__STATIC_INLINE void	DMA_IntClear (uint32_t flags)
	Clear one or more pending DMA interrupts. More...

__STATIC_INLINE void	DMA_IntDisable (uint32_t flags)
	Disable one or more DMA interrupts. More...

__STATIC_INLINE void	DMA_IntEnable (uint32_t flags)
	Enable one or more DMA interrupts. More...

__STATIC_INLINE uint32_t	DMA_IntGet (void)
	Get pending DMA interrupt flags. More...

__STATIC_INLINE uint32_t	DMA_IntGetEnabled (void)
	Get enabled and pending DMA interrupt flags. Useful for handling more interrupt sources in the same interrupt handler. More...

__STATIC_INLINE void	DMA_IntSet (uint32_t flags)
	Set one or more pending DMA interrupts. More...

void	DMA_IRQHandler (void)
	Interrupt handler for DMA cycle completion handling. More...

void	DMA_RefreshPingPong (unsigned int channel, bool primary, bool useBurst, void dst, const void src, unsigned int nMinus1, bool stop)
	Refresh a descriptor used in a DMA ping-pong cycle. More...

void	DMA_Reset (void)
	Reset the DMA controller. More...

Detailed Description

License

Data Structures

Typedefs

Enumerations

Functions