diff options
Diffstat (limited to 'bsps/arm/atsam/include/libchip/include/dac_dma.h')
-rw-r--r-- | bsps/arm/atsam/include/libchip/include/dac_dma.h | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/bsps/arm/atsam/include/libchip/include/dac_dma.h b/bsps/arm/atsam/include/libchip/include/dac_dma.h new file mode 100644 index 0000000000..11d100b76d --- /dev/null +++ b/bsps/arm/atsam/include/libchip/include/dac_dma.h @@ -0,0 +1,150 @@ +/* ---------------------------------------------------------------------------- */ +/* Atmel Microcontroller Software Support */ +/* SAM Software Package License */ +/* ---------------------------------------------------------------------------- */ +/* Copyright (c) 2015, Atmel Corporation */ +/* */ +/* All rights reserved. */ +/* */ +/* Redistribution and use in source and binary forms, with or without */ +/* modification, are permitted provided that the following condition is met: */ +/* */ +/* - Redistributions of source code must retain the above copyright notice, */ +/* this list of conditions and the disclaimer below. */ +/* */ +/* Atmel's name may not be used to endorse or promote products derived from */ +/* this software without specific prior written permission. */ +/* */ +/* DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR */ +/* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF */ +/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE */ +/* DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, */ +/* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT */ +/* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, */ +/* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF */ +/* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING */ +/* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, */ +/* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ +/* ---------------------------------------------------------------------------- */ + +/** + * \file + * + * \section Purpose + * + * Interface for configuration the Analog-to-Digital Converter (DACC) peripheral. + * + * \section Usage + * + * -# Configurate the pins for DACC + * -# Initialize the DACC with DACC_Initialize(). + * -# Select the active channel using DACC_EnableChannel() + * -# Start the conversion with DACC_StartConversion() + * -# Wait the end of the conversion by polling status with DACC_GetStatus() + * -# Finally, get the converted data using DACC_GetConvertedData() + * +*/ +#ifndef _DAC_DMA_ +#define _DAC_DMA_ + +/*---------------------------------------------------------------------------- + * Headers + *----------------------------------------------------------------------------*/ +#include "chip.h" + +#include <stdint.h> +#include <assert.h> + + +#ifdef __cplusplus +extern "C" { +#endif + + +/*---------------------------------------------------------------------------- + * Types + *----------------------------------------------------------------------------*/ + +/** DAC transfer complete callback. */ +typedef void (*DacCallback)(uint8_t, void *); + +/** \brief Dac Transfer Request prepared by the application upper layer. + * + * This structure is sent to the DAC_SendCommand function to start the transfer. + * At the end of the transfer, the callback is invoked by the interrupt handler. + */ +typedef struct { + /** Pointer to the Tx data. */ + uint8_t *pTxBuff; + /** Tx size in bytes. */ + uint16_t TxSize; + /** Tx loop back. */ + uint16_t loopback; + /** DACC channel*/ + uint8_t dacChannel; + /** Callback function invoked at the end of transfer. */ + DacCallback callback; + /** Callback arguments. */ + void *pArgument; +} DacCmd; + + +/** Constant structure associated with DAC port. This structure prevents + client applications to have access in the same time. */ +typedef struct { + /** Pointer to DAC Hardware registers */ + Dacc *pDacHw; + /** Current SpiCommand being processed */ + DacCmd *pCurrentCommand; + /** Pointer to DMA driver */ + sXdmad *pXdmad; + /** DACC Id as defined in the product datasheet */ + uint8_t dacId; + /** Mutual exclusion semaphore. */ + volatile int8_t semaphore; +} DacDma; + + +/*------------------------------------------------------------------------------ + * Definitions + *------------------------------------------------------------------------------*/ +#define DAC_OK 0 +#define DAC_ERROR 1 +#define DAC_ERROR_LOCK 2 + +#define DACC_CHANNEL_0 0 +#define DACC_CHANNEL_1 1 + +/*------------------------------------------------------------------------------ + * Exported functions + *------------------------------------------------------------------------------*/ +extern uint32_t Dac_ConfigureDma(DacDma *pDacd , + Dacc *pDacHw , + uint8_t DacId, + sXdmad *pXdmad); +extern uint32_t Dac_SendData(DacDma *pDacd, DacCmd *pCommand); + + +/*------------------------------------------------------------------------------ + * Macros function of register access + *------------------------------------------------------------------------------*/ +#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) + + +#ifdef __cplusplus +} +#endif + +#endif /* #ifndef _DAC_DMA_ */ |