afe_dma.h File Reference

#include "chip.h"

Go to the source code of this file.

Data Structures
struct	AfeCmd
	Spi Transfer Request prepared by the application upper layer. More...
struct	AfeDma

Macros
#define	AFE_OK   0
#define	AFE_ERROR   1
#define	AFE_ERROR_LOCK   2

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

Functions
uint32_t	Afe_ConfigureDma (AfeDma *pAfed, Afec *pAfeHw, uint8_t AfeId, sXdmad *pXdmad)
	Initializes the AfeDma structure and the corresponding AFE & 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	Afe_SendData (AfeDma *pAfed, AfeCmd *pCommand)
	Starts a AFE 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 (AFEC) peripheral.

Usage

1. Configurate the pins for AFEC.
2. Initialize the AFEC with AFEC_Initialize().
3. Set AFEC clock and timing with AFEC_SetClock() and AFEC_SetTiming().
4. Select the active channel using AFEC_EnableChannel().
5. Start the conversion with AFEC_StartConversion().
6. Wait the end of the conversion by polling status with AFEC_GetStatus().
7. Finally, get the converted data using AFEC_GetConvertedData() or AFEC_GetLastConvertedData().

Typedef Documentation

AfeCallback

typedef void(* AfeCallback) (uint8_t, void *)

AFE transfer complete callback.

Function Documentation

Afe_ConfigureDma()

uint32_t Afe_ConfigureDma	(	AfeDma *	pAfed,
		Afec *	pAfeHw,
		uint8_t	AfeId,
		sXdmad *	pXdmad
	)

Initializes the AfeDma structure and the corresponding AFE & 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

pAfed	Pointer to a AfeDma instance.
pAfeHw	Associated Afe peripheral.
AfeId	Afe peripheral identifier.
pDmad	Pointer to a Dmad instance.

Afe_SendData()

uint32_t Afe_SendData	(	AfeDma *	pAfed,
		AfeCmd *	pCommand
	)

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

Parameters

pAfed	Pointer to a AfeDma instance.
pCommand	Pointer to the Afe command to execute.

Returns

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