SAMV71 Xplained Ultra Software Package 1.4

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

Defines

#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().

Definition in file afe_dma.h.


Typedef Documentation

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

AFE transfer complete callback.

Definition at line 64 of file afe_dma.h.


Function Documentation

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.

Definition at line 191 of file afe_dma.c.

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.

Definition at line 215 of file afe_dma.c.

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