109 lines
3.3 KiB
C++
109 lines
3.3 KiB
C++
/**
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* Copyright (c) 2011-2018 Bill Greiman
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* This file is part of the SdFat library for SD memory cards.
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*
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* MIT License
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#include "SdioCard.h"
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// limit of K66 due to errata KINETIS_K_0N65N.
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const uint32_t MAX_SDHC_COUNT = 0XFFFF;
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// Max RU is 1024 blocks.
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const uint32_t RU_MASK = 0X03FF;
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bool SdioCardEX::readBlock(uint32_t lba, uint8_t* dst) {
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if (m_curState != READ_STATE || lba != m_curLba) {
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if (!syncBlocks()) {
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return false;
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}
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m_limitLba = (lba + MAX_SDHC_COUNT) & ~RU_MASK;
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if (!SdioCard::readStart(lba, m_limitLba - lba)) {
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return false;
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}
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m_curLba = lba;
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m_curState = READ_STATE;
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}
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if (!SdioCard::readData(dst)) {
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return false;
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}
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m_curLba++;
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if (m_curLba >= m_limitLba) {
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m_curState = IDLE_STATE;
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}
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return true;
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}
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//-----------------------------------------------------------------------------
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bool SdioCardEX::readBlocks(uint32_t lba, uint8_t* dst, size_t nb) {
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for (size_t i = 0; i < nb; i++) {
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if (!readBlock(lba + i, dst + i*512UL)) {
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return false;
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}
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}
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return true;
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}
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//-----------------------------------------------------------------------------
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bool SdioCardEX::syncBlocks() {
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if (m_curState == READ_STATE) {
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m_curState = IDLE_STATE;
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if (!SdioCard::readStop()) {
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return false;
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}
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} else if (m_curState == WRITE_STATE) {
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m_curState = IDLE_STATE;
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if (!SdioCard::writeStop()) {
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return false;
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}
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}
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return true;
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}
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//-----------------------------------------------------------------------------
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bool SdioCardEX::writeBlock(uint32_t lba, const uint8_t* src) {
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if (m_curState != WRITE_STATE || m_curLba != lba) {
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if (!syncBlocks()) {
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return false;
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}
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m_limitLba = (lba + MAX_SDHC_COUNT) & ~RU_MASK;
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if (!SdioCard::writeStart(lba , m_limitLba - lba)) {
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return false;
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}
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m_curLba = lba;
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m_curState = WRITE_STATE;
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}
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if (!SdioCard::writeData(src)) {
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return false;
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}
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m_curLba++;
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if (m_curLba >= m_limitLba) {
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m_curState = IDLE_STATE;
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}
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return true;
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}
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//-----------------------------------------------------------------------------
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bool SdioCardEX::writeBlocks(uint32_t lba, const uint8_t* src, size_t nb) {
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for (size_t i = 0; i < nb; i++) {
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if (!writeBlock(lba + i, src + i*512UL)) {
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return false;
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}
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}
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return true;
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}
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