103 lines
3.6 KiB
C++
103 lines
3.6 KiB
C++
/**
|
|
* Copyright (c) 2011-2018 Bill Greiman
|
|
* This file is part of the SdFat library for SD memory cards.
|
|
*
|
|
* MIT License
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included
|
|
* in all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
|
|
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
|
* DEALINGS IN THE SOFTWARE.
|
|
*/
|
|
#if defined(PLATFORM_ID)
|
|
#include "SdSpiDriver.h"
|
|
static volatile bool SPI_DMA_TransferCompleted = false;
|
|
//-----------------------------------------------------------------------------
|
|
static void SD_SPI_DMA_TransferComplete_Callback(void) {
|
|
SPI_DMA_TransferCompleted = true;
|
|
}
|
|
//------------------------------------------------------------------------------
|
|
/** Set SPI options for access to SD/SDHC cards.
|
|
*
|
|
* \param[in] divisor SCK clock divider relative to the APB1 or APB2 clock.
|
|
*/
|
|
void SdSpiAltDriver::activate() {
|
|
m_spi->beginTransaction(m_spiSettings);
|
|
}
|
|
//------------------------------------------------------------------------------
|
|
/** Initialize the SPI bus.
|
|
*
|
|
* \param[in] chipSelectPin SD card chip select pin.
|
|
*/
|
|
void SdSpiAltDriver::begin(uint8_t csPin) {
|
|
m_csPin = csPin;
|
|
m_spi->begin();
|
|
pinMode(m_csPin, OUTPUT);
|
|
digitalWrite(m_csPin, HIGH);
|
|
}
|
|
//------------------------------------------------------------------------------
|
|
/**
|
|
* End SPI transaction.
|
|
*/
|
|
void SdSpiAltDriver::deactivate() {
|
|
m_spi->endTransaction();
|
|
}
|
|
//------------------------------------------------------------------------------
|
|
/** Receive a byte.
|
|
*
|
|
* \return The byte.
|
|
*/
|
|
uint8_t SdSpiAltDriver::receive() {
|
|
return m_spi->transfer(0XFF);
|
|
}
|
|
//------------------------------------------------------------------------------
|
|
/** Receive multiple bytes.
|
|
*
|
|
* \param[out] buf Buffer to receive the data.
|
|
* \param[in] n Number of bytes to receive.
|
|
*
|
|
* \return Zero for no error or nonzero error code.
|
|
*/
|
|
uint8_t SdSpiAltDriver::receive(uint8_t* buf, size_t n) {
|
|
SPI_DMA_TransferCompleted = false;
|
|
m_spi->transfer(nullptr, buf, n, SD_SPI_DMA_TransferComplete_Callback);
|
|
while (!SPI_DMA_TransferCompleted) {}
|
|
return 0;
|
|
}
|
|
//------------------------------------------------------------------------------
|
|
/** Send a byte.
|
|
*
|
|
* \param[in] b Byte to send
|
|
*/
|
|
void SdSpiAltDriver::send(uint8_t b) {
|
|
m_spi->transfer(b);
|
|
}
|
|
//------------------------------------------------------------------------------
|
|
/** Send multiple bytes.
|
|
*
|
|
* \param[in] buf Buffer for data to be sent.
|
|
* \param[in] n Number of bytes to send.
|
|
*/
|
|
void SdSpiAltDriver::send(const uint8_t* buf , size_t n) {
|
|
SPI_DMA_TransferCompleted = false;
|
|
|
|
m_spi->transfer(const_cast<uint8_t*>(buf), nullptr, n,
|
|
SD_SPI_DMA_TransferComplete_Callback);
|
|
|
|
while (!SPI_DMA_TransferCompleted) {}
|
|
}
|
|
#endif // defined(PLATFORM_ID)
|