![](/media/cache/img/default_profile.jpg.50x50_q85.jpg)
Minor changes to support ADMW FWv1.17.75
Diff: src/mbed/admw_spi.cpp
- Revision:
- 5:0728bde67bdb
- Parent:
- 0:85855ecd3257
- Child:
- 13:97cb32670539
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/mbed/admw_spi.cpp Wed Jun 05 05:39:15 2019 +0000 @@ -0,0 +1,155 @@ +/****************************************************************************** +Copyright 2017 (c) Analog Devices, Inc. + +All rights reserved. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are met: + - Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + - Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in + the documentation and/or other materials provided with the + distribution. + - Neither the name of Analog Devices, Inc. nor the names of its + contributors may be used to endorse or promote products derived + from this software without specific prior written permission. + - The use of this software may or may not infringe the patent rights + of one or more patent holders. This license does not release you + from the requirement that you obtain separate licenses from these + patent holders to use this software. + - Use of the software either in source or binary form, must be run + on or directly connected to an Analog Devices Inc. component. + +THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES "AS IS" AND ANY EXPRESS OR +IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, NON-INFRINGEMENT, +MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. +IN NO EVENT SHALL ANALOG DEVICES BE LIABLE FOR ANY DIRECT, INDIRECT, +INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +LIMITED TO, INTELLECTUAL PROPERTY RIGHTS, 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: + * @brief: ADMW OS-dependent wrapper layer for SPI interface + *----------------------------------------------------------------------------- + */ + +#include <mbed.h> + +#include "inc/admw_spi.h" +#include "inc/admw_log.h" + +#define ADMW_SPI_MODE 0 /* CPOL=0, CPHA=0 */ +#define ADMW_SPI_FRAME_SIZE 8 /* 8-bit frame size */ + + +#ifdef __cplusplus +extern "C" { +#endif + + +// Struct to contain anything needed to identify the SPI device +// This is returned as a ADMW_SPI_HANDLE*, and is required to use +// the other SPI functions +typedef struct { + SPI *_spi; + DigitalOut *_cs; + DigitalOut *_wakeup; +} SpiContext_t; + + +/* + * Open the SPI interface and allocate resources + */ +ADMW_RESULT admw_SpiOpen( + ADMW_PLATFORM_SPI_CONFIG *pConfig, + ADMW_SPI_HANDLE *phDevice) +{ + SpiContext_t *pCtx = (SpiContext_t*)malloc(sizeof(*pCtx)); + if(!pCtx) { + ADMW_LOG_ERROR("Failed to allocate memory for SPI device"); + return ADMW_NO_MEM; + } + + pCtx->_spi = new SPI((PinName)pConfig->mosiPin, + (PinName)pConfig->misoPin, + (PinName)pConfig->sckPin); + pCtx->_cs = new DigitalOut((PinName)pConfig->csPin, 1); + + pCtx->_spi->format(ADMW_SPI_FRAME_SIZE, ADMW_SPI_MODE); + pCtx->_spi->frequency(pConfig->maxSpeedHz); + + pCtx->_wakeup = new DigitalOut((PinName)pConfig->wakeupPin, 1); + + *phDevice = (ADMW_SPI_HANDLE)pCtx; + + return ADMW_SUCCESS; +} + +/* + * Execute a bi-directional data transfer on the SPI interface + */ +ADMW_RESULT +admw_SpiTransfer( + ADMW_SPI_HANDLE hDevice, + void *pTxData, + void *pRxData, + unsigned nLength, + bool bCsHold) +{ + int rc = 0; + + SpiContext_t *pCtx = (SpiContext_t*)hDevice; + + *(pCtx->_wakeup) = 0; + + wait_us(60); + + *(pCtx->_cs) = 0; + + rc = pCtx->_spi->write((char*)(pTxData), pTxData ? nLength : 0, + (char*)(pRxData), pRxData ? nLength : 0); + + if ((rc < 0) || !bCsHold) + *(pCtx->_cs) = 1; + + *(pCtx->_wakeup) = 1; + + if (rc < 0) + { + ADMW_LOG_ERROR("Failed to complete SPI transfer"); + return ADMW_FAILURE; + } + + return ADMW_SUCCESS; +} + +/* + * Close the SPI interface and free resources + */ +void admw_SpiClose( + ADMW_SPI_HANDLE hDevice) +{ + SpiContext_t *pCtx = (SpiContext_t *)hDevice; + + delete pCtx->_spi; + delete pCtx->_cs; + delete pCtx->_wakeup; + + free(pCtx); +} + +#ifdef __cplusplus +} +#endif + +/*! + * @} + */