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91 lines
2.9 KiB
C++
91 lines
2.9 KiB
C++
/* Arduino SdSpiAltDriver Library
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* Copyright (C) 2016 by William Greiman
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*
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* STM32F1 code for Maple and Maple Mini support, 2015 by Victor Perez
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*
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* This file is part of the Arduino SdSpiAltDriver Library
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*
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* This Library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This Library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with the Arduino SdSpiAltDriver Library. If not, see
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* <http://www.gnu.org/licenses/>.
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*/
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#if defined(ESP8266)
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#include "SdSpiDriver.h"
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//------------------------------------------------------------------------------
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/** Initialize the SPI bus.
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*
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* \param[in] chipSelectPin SD card chip select pin.
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*/
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void SdSpiAltDriver::begin(uint8_t csPin) {
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m_csPin = csPin;
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pinMode(m_csPin, OUTPUT);
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digitalWrite(m_csPin, HIGH);
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SPI.begin();
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}
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//------------------------------------------------------------------------------
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/** Set SPI options for access to SD/SDHC cards.
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*
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*/
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void SdSpiAltDriver::activate() {
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SPI.beginTransaction(m_spiSettings);
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}
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//------------------------------------------------------------------------------
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void SdSpiAltDriver::deactivate() {
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// Note: endTransaction is an empty function on ESP8266.
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SPI.endTransaction();
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}
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//------------------------------------------------------------------------------
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/** Receive a byte.
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*
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* \return The byte.
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*/
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uint8_t SdSpiAltDriver::receive() {
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return SPI.transfer(0XFF);
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}
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//------------------------------------------------------------------------------
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/** Receive multiple bytes.
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*
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* \param[out] buf Buffer to receive the data.
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* \param[in] n Number of bytes to receive.
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*
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* \return Zero for no error or nonzero error code.
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*/
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uint8_t SdSpiAltDriver::receive(uint8_t* buf, size_t n) {
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// Works without 32-bit alignment of buf.
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SPI.transferBytes(0, buf, n);
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return 0;
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}
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//------------------------------------------------------------------------------
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/** Send a byte.
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*
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* \param[in] b Byte to send
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*/
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void SdSpiAltDriver::send(uint8_t b) {
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SPI.transfer(b);
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}
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//------------------------------------------------------------------------------
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/** Send multiple bytes.
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*
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* \param[in] buf Buffer for data to be sent.
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* \param[in] n Number of bytes to send.
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*/
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void SdSpiAltDriver::send(const uint8_t* buf , size_t n) {
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// Adjust to 32-bit alignment.
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while ((reinterpret_cast<uintptr_t>(buf) & 0X3) && n) {
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SPI.transfer(*buf++);
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n--;
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}
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SPI.transferBytes(const_cast<uint8_t*>(buf), 0, n);
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}
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#endif // defined(ESP8266)
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