dac_dma.h File Reference

#include "chip.h"
#include <stdint.h>
#include <assert.h>

Go to the source code of this file.

Data Structures
struct	DacCmd
	Dac Transfer Request prepared by the application upper layer. More...
struct	DacDma

Macros
#define	DAC_OK   0
#define	DAC_ERROR   1
#define	DAC_ERROR_LOCK   2
#define	DACC_CHANNEL_0   0
#define	DACC_CHANNEL_1   1
#define	DACC_SoftReset(pDACC)   ((pDACC)->DACC_CR = DACC_CR_SWRST)
#define	DACC_CfgModeReg(pDACC, mode)   { (pDACC)->DACC_MR = (mode); }
#define	DACC_GetModeReg(pDACC)   ((pDACC)->DACC_MR)
#define	DACC_CfgTrigger(pDACC, mode)   { (pDACC)->DACC_TRIGR = (mode); }
#define	DACC_EnableChannel(pDACC, channel)   {(pDACC)->DACC_CHER = (1 << (channel));}
#define	DACC_DisableChannel(pDACC, channel)   {(pDACC)->DACC_CHDR = (1 << (channel));}
#define	DACC_EnableIt(pDACC, mode)   {(pDACC)->DACC_IER = (mode);}
#define	DACC_DisableIt(pDACC, mode)   {(pDACC)->DACC_IDR = (mode);}
#define	DACC_GetStatus(pDACC)   ((pDACC)->DACC_ISR)
#define	DACC_GetChannelStatus(pDACC)   ((pDACC)->DACC_CHSR)
#define	DACC_GetInterruptMaskStatus(pDACC)   ((pDACC)->DACC_IMR)

Typedefs
typedef void(*	DacCallback) (uint8_t, void *)

Functions
uint32_t	Dac_ConfigureDma (DacDma *pDacd, Dacc *pDacHw, uint8_t DacId, sXdmad *pXdmad)
	Initializes the DacDma structure and the corresponding DAC & DMA . hardware select value. The driver will uses DMA channel 0 for RX . The DMA channels are freed automatically when no DMA command processing.
uint32_t	Dac_SendData (DacDma *pDacd, DacCmd *pCommand)
	Starts a DAC transfer. This is a non blocking function. It will return as soon as the transfer is started.

Detailed Description

Purpose

Interface for configuration the Analog-to-Digital Converter (DACC) peripheral.

Usage

1. Configurate the pins for DACC
2. Initialize the DACC with DACC_Initialize().
3. Select the active channel using DACC_EnableChannel()
4. Start the conversion with DACC_StartConversion()
5. Wait the end of the conversion by polling status with DACC_GetStatus()
6. Finally, get the converted data using DACC_GetConvertedData()

Typedef Documentation

DacCallback

typedef void(* DacCallback) (uint8_t, void *)

DAC transfer complete callback.

Function Documentation

Dac_ConfigureDma()

uint32_t Dac_ConfigureDma	(	DacDma *	pDacd,
		Dacc *	pDacHw,
		uint8_t	DacId,
		sXdmad *	pXdmad
	)

Initializes the DacDma structure and the corresponding DAC & DMA . hardware select value. The driver will uses DMA channel 0 for RX . The DMA channels are freed automatically when no DMA command processing.

Parameters

pDacd	Pointer to a DacDma instance.
pDacHw	Associated Dac peripheral.
DacId	Dac peripheral identifier.
pDmad	Pointer to a Dmad instance.

Dac_SendData()

uint32_t Dac_SendData	(	DacDma *	pDacd,
		DacCmd *	pCommand
	)

Starts a DAC transfer. This is a non blocking function. It will return as soon as the transfer is started.

Parameters

pDacd	Pointer to a DacDma instance.
pCommand	Pointer to the Dac command to execute.

Returns

0 if the transfer has been started successfully; otherwise returns DAC_ERROR_LOCK is the driver is in use, or DAC_ERROR if the command is not valid.