00001 /* ---------------------------------------------------------------------------- */ 00002 /* Atmel Microcontroller Software Support */ 00003 /* SAM Software Package License */ 00004 /* ---------------------------------------------------------------------------- */ 00005 /* Copyright (c) 2015, Atmel Corporation */ 00006 /* */ 00007 /* All rights reserved. */ 00008 /* */ 00009 /* Redistribution and use in source and binary forms, with or without */ 00010 /* modification, are permitted provided that the following condition is met: */ 00011 /* */ 00012 /* - Redistributions of source code must retain the above copyright notice, */ 00013 /* this list of conditions and the disclaimer below. */ 00014 /* */ 00015 /* Atmel's name may not be used to endorse or promote products derived from */ 00016 /* this software without specific prior written permission. */ 00017 /* */ 00018 /* DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR */ 00019 /* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF */ 00020 /* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE */ 00021 /* DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, */ 00022 /* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT */ 00023 /* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, */ 00024 /* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF */ 00025 /* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING */ 00026 /* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, */ 00027 /* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ 00028 /* ---------------------------------------------------------------------------- */ 00029 00030 /** 00031 * \file 00032 * 00033 * \section Purpose 00034 * 00035 * Interface for configuration the Analog-to-Digital Converter (AFEC) peripheral. 00036 * 00037 * \section Usage 00038 * 00039 * -# Configurate the pins for AFEC. 00040 * -# Initialize the AFEC with AFEC_Initialize(). 00041 * -# Set AFEC clock and timing with AFEC_SetClock() and AFEC_SetTiming(). 00042 * -# Select the active channel using AFEC_EnableChannel(). 00043 * -# Start the conversion with AFEC_StartConversion(). 00044 * -# Wait the end of the conversion by polling status with AFEC_GetStatus(). 00045 * -# Finally, get the converted data using AFEC_GetConvertedData() or 00046 * AFEC_GetLastConvertedData(). 00047 * 00048 */ 00049 #ifndef _AFE_DMA_ 00050 #define _AFE_DMA_ 00051 00052 /*---------------------------------------------------------------------------- 00053 * Headers 00054 *----------------------------------------------------------------------------*/ 00055 00056 #include "chip.h" 00057 00058 00059 /*---------------------------------------------------------------------------- 00060 * Types 00061 *----------------------------------------------------------------------------*/ 00062 00063 /** AFE transfer complete callback. */ 00064 typedef void (*AfeCallback)(uint8_t, void *); 00065 00066 /** \brief Spi Transfer Request prepared by the application upper layer. 00067 * 00068 * This structure is sent to the AFE_SendCommand function to start the transfer. 00069 * At the end of the transfer, the callback is invoked by the interrupt handler. 00070 */ 00071 typedef struct { 00072 /** Pointer to the Rx data. */ 00073 uint32_t *pRxBuff; 00074 /** Rx size in bytes. */ 00075 uint16_t RxSize; 00076 /** Callback function invoked at the end of transfer. */ 00077 AfeCallback callback; 00078 /** Callback arguments. */ 00079 void *pArgument; 00080 } AfeCmd; 00081 00082 00083 /** Constant structure associated with AFE port. This structure prevents 00084 client applications to have access in the same time. */ 00085 typedef struct { 00086 /** Pointer to AFE Hardware registers */ 00087 Afec *pAfeHw; 00088 /** Current SpiCommand being processed */ 00089 AfeCmd *pCurrentCommand; 00090 /** Pointer to DMA driver */ 00091 sXdmad *pXdmad; 00092 /** AFEC Id as defined in the product datasheet */ 00093 uint8_t afeId; 00094 /** Mutual exclusion semaphore. */ 00095 volatile int8_t semaphore; 00096 } AfeDma; 00097 00098 00099 /*------------------------------------------------------------------------------ 00100 * Definitions 00101 *----------------------------------------------------------------------------*/ 00102 #define AFE_OK 0 00103 #define AFE_ERROR 1 00104 #define AFE_ERROR_LOCK 2 00105 /*------------------------------------------------------------------------------ 00106 * Exported functions 00107 *----------------------------------------------------------------------------*/ 00108 extern uint32_t Afe_ConfigureDma(AfeDma *pAfed , 00109 Afec *pAfeHw , 00110 uint8_t AfeId, 00111 sXdmad *pXdmad); 00112 extern uint32_t Afe_SendData(AfeDma *pAfed, AfeCmd *pCommand); 00113 00114 00115 #endif /* #ifndef _AFE_DMA_ */ 00116