twid.h

/* ---------------------------------------------------------------------------- */
/*                  Atmel Microcontroller Software Support                      */
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/* Copyright (c) 2015, Atmel Corporation                                        */
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/* ---------------------------------------------------------------------------- */
 
#ifndef _TWID_
#define _TWID_
 
/*----------------------------------------------------------------------------
 *        Headers
 *----------------------------------------------------------------------------*/
 
#include "chip.h"
 
#include <stdint.h>
 
/*----------------------------------------------------------------------------
 *        Definition
 *----------------------------------------------------------------------------*/
 
#define TWID_ERROR_BUSY              1
 
#define ASYNC_STATUS_PENDING        0xFF
#ifdef __cplusplus
extern "C" {
#endif
 
/*----------------------------------------------------------------------------
 *        Types
 *----------------------------------------------------------------------------*/
 
/*----------------------------------------------------------------------------
*        Type
*----------------------------------------------------------------------------*/
typedef struct _Async {
    volatile uint32_t status;
    void *callback;
    uint8_t pStorage[9];
} Async;
 
typedef struct _Twid {
    Twihs *pTwi;
    Async *pTransfer;
} Twid;
 
typedef struct {
    uint8_t Twi_id;
    Twid *pTwid;
    sXdmad *pTwiDma;
} TwihsDma;
 
/*----------------------------------------------------------------------------
 *        Export functions
 *----------------------------------------------------------------------------*/
extern void TWID_Initialize(Twid *pTwid, Twihs *pTwi);
extern void TWID_DmaInitialize(TwihsDma *pTwidma, Twihs *pTwi,
                               uint8_t bPolling);
 
extern void TWID_Handler(Twid *pTwid);
 
extern uint32_t ASYNC_IsFinished(Async *pAsync);
 
extern uint8_t TWID_Read(
    Twid *pTwid,
    uint8_t address,
    uint32_t iaddress,
    uint8_t isize,
    uint8_t *pData,
    uint32_t num,
    Async *pAsync);
 
extern uint8_t TWID_Write(
    Twid *pTwid,
    uint8_t address,
    uint32_t iaddress,
    uint8_t isize,
    uint8_t *pData,
    uint32_t num,
    Async *pAsync);
 
extern uint8_t TWID_DmaRead(
    TwihsDma *pTwiXdma,
    uint8_t address,
    uint32_t iaddress,
    uint8_t isize,
    uint8_t *pData,
    uint32_t num,
    Async *pAsync);
 
extern uint8_t TWID_DmaWrite(
    TwihsDma *pTwiXdma,
    uint8_t address,
    uint32_t iaddress,
    uint8_t isize,
    uint8_t *pData,
    uint32_t num,
    Async *pAsync);
 
#ifdef __cplusplus
}
#endif
 
#endif //#ifndef TWID_H