mirror of
https://gitlab.com/fabinfra/fabhardware/FabReader2.git
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97 lines
3.1 KiB
C
97 lines
3.1 KiB
C
/**
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******************************************************************************
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*
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* COPYRIGHT(c) 2016 STMicroelectronics
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. Neither the name of STMicroelectronics nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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******************************************************************************
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*/
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/*! \file
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*
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* \author
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*
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* \brief SPI communication handling implementation.
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*
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "spi.h"
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#include "st_errno.h"
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#include "string.h"
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#define SPI_TIMEOUT 1000
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#define SPI_BUF_LEN 97
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static uint8_t txBuf[SPI_BUF_LEN];
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static uint8_t rxBuf[SPI_BUF_LEN];
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SPI_HandleTypeDef *pSpi = 0;
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void spiInit(SPI_HandleTypeDef *hspi)
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{
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pSpi = hspi;
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/* enabling SPI block will put SCLK to output, guaranteeing proper state when spiSelect() gets called */
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__HAL_SPI_ENABLE(hspi);
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}
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void spiSelect(GPIO_TypeDef *ssPort, uint16_t ssPin)
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{
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HAL_GPIO_WritePin(ssPort, ssPin, GPIO_PIN_RESET);
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}
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void spiDeselect(GPIO_TypeDef *ssPort, uint16_t ssPin)
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{
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HAL_GPIO_WritePin(ssPort, ssPin, GPIO_PIN_SET);
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}
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HAL_StatusTypeDef spiTxRx(const uint8_t *txData, uint8_t *rxData, uint16_t length)
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{
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if(pSpi == 0)
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return HAL_ERROR;
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if(length > SPI_BUF_LEN)
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{
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return HAL_ERROR;
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}
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/* Initialize Tx data*/
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if(txData != NULL)
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{
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memcpy(txBuf, txData, length );
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}
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else
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{
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memset(txBuf, 0x00, length );
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}
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return HAL_SPI_TransmitReceive(pSpi, txBuf, (rxData != NULL) ? rxData : rxBuf, length, SPI_TIMEOUT);
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}
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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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