amiro-os / components / FileSystemInputOutput / FileSystemInputOutputBase.cpp @ 58fe0e0b
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#include <amiro/FileSystemInputOutput/FileSystemInputOutputBase.hpp> |
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using namespace amiro; |
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using namespace amiro::fileSystemIo; |
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msg_t |
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FileSystemIoBase::init() |
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{
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msg_t returnValue = OK; |
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// Get the preamble
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const uint8_t bufferSize = sizeof(FileSystemIoBase::preamble_1_1); |
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uint8_t buffer[bufferSize]; |
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chFileStreamSeek((BaseFileStream*)&at24c01, offsetof(FileSystemIoBase::preamble_1_1, magicByte)); |
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const size_t bytesRead = chSequentialStreamRead((BaseFileStream*)&at24c01, (uint8_t*) buffer, bufferSize);
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// reading failed -> error
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if (bytesRead != bufferSize) {
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returnValue |= IO_ERROR; |
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return returnValue;
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} |
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// magic byte is incorrect -> error
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if (buffer[offsetof(FileSystemIoBase::preamble_1_1, magicByte)] != magicByteValue()) {
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returnValue |= WRONG_MAGICBYTE_VALUE; |
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return returnValue;
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} |
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// BSMV is incorrect -> error
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if (buffer[offsetof(FileSystemIoBase::preamble_1_1, byteStructureMajorVersion)] != BSMV) {
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returnValue |= WRONG_BSMV; |
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return returnValue;
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} |
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// bsmv in smaller -> initialize
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if (buffer[offsetof(FileSystemIoBase::preamble_1_1, byteStructureMinorVersion)] < bsmv) {
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returnValue |= WRONG_bsmv; |
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// initialize all missing data
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for (uint8_t v = bsmv; v > buffer[offsetof(FileSystemIoBase::preamble_1_1, byteStructureMinorVersion)]; --v)
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{
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returnValue |= initPreamble(BSMV, v, false);
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} |
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} |
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// HMV is incorrect -> error
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if (buffer[offsetof(FileSystemIoBase::preamble_1_1, hardwareMajorVersion)] != HMV) {
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returnValue |= WRONG_HMV; |
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return returnValue;
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} |
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// hmv is incorrect -> error
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if (buffer[offsetof(FileSystemIoBase::preamble_1_1, hardwareMinorVersion)] >= hmv) {
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returnValue |= WRONG_hmv; |
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} |
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return returnValue;
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} |
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msg_t |
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FileSystemIoBase:: |
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getCheck() {
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// Get the preamble
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const uint8_t bufferSize = sizeof(FileSystemIoBase::preamble_1_1); |
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uint8_t buffer[bufferSize]; |
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chFileStreamSeek((BaseFileStream*)&at24c01, offsetof(FileSystemIoBase::preamble_1_1, magicByte)); |
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const size_t bytesRead = chSequentialStreamRead((BaseFileStream*)&at24c01, (uint8_t*) buffer, bufferSize);
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if (bytesRead != bufferSize) {
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return IO_ERROR;
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} else if (buffer[offsetof(FileSystemIoBase::preamble_1_1, magicByte)] != magicByteValue()) { |
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return WRONG_MAGICBYTE_VALUE;
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} else if (buffer[offsetof(FileSystemIoBase::preamble_1_1, byteStructureMajorVersion)] != BSMV) { |
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return WRONG_BSMV;
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} else if (buffer[offsetof(FileSystemIoBase::preamble_1_1, byteStructureMinorVersion)] < bsmv) { |
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return WRONG_bsmv;
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} else if (buffer[offsetof(FileSystemIoBase::preamble_1_1, hardwareMajorVersion)] != HMV) { |
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return WRONG_HMV;
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} else if (buffer[offsetof(FileSystemIoBase::preamble_1_1, hardwareMinorVersion)] < hmv) { |
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return WRONG_hmv;
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} else {
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return OK;
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} |
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} |
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msg_t |
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FileSystemIoBase::initPreamble(const uint8_t BSMV, const uint8_t bsmv, const bool strict) |
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{
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uint8_t buffer[3] = {};
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if (strict) {
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// initialize the magic byte
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chFileStreamSeek((BaseFileStream*)&this->at24c01, offsetof(FileSystemIoBase::preamble_1_1, magicByte));
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buffer[0] = magicByteValue();
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if (chSequentialStreamWrite((BaseFileStream*)&this->at24c01, buffer, 1) != 1) { |
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return IO_ERROR;
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} |
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} |
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switch (BSMV)
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{
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case 1: |
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if (strict) {
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// initialize the BSMV
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chFileStreamSeek((BaseFileStream*)&this->at24c01, offsetof(FileSystemIoBase::preamble_1_1, byteStructureMajorVersion));
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buffer[0] = BSMV;
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if (chSequentialStreamWrite((BaseFileStream*)&this->at24c01, buffer, 1) != 1) { |
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return IO_ERROR;
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} |
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} |
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// initialize the bsmv
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chFileStreamSeek((BaseFileStream*)&this->at24c01, offsetof(FileSystemIoBase::preamble_1_1, byteStructureMinorVersion));
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buffer[0] = bsmv;
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if (chSequentialStreamWrite((BaseFileStream*)&this->at24c01, buffer, 1) != 1) { |
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return IO_ERROR;
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} |
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// initialize the content
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switch (bsmv)
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{
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case 2: |
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// initialize the board ID
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chFileStreamSeek((BaseFileStream*)&this->at24c01, offsetof(FileSystemIoBase::preamble_1_2, boardId));
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buffer[0] = 0; |
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if (chSequentialStreamWrite((BaseFileStream*)&this->at24c01, buffer, 1) != 1) { |
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return IO_ERROR;
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} |
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if (!strict) {
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break;
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} |
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case 1: |
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// initialize the bsmv, the HMV and the hmv
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chFileStreamSeek((BaseFileStream*)&this->at24c01, offsetof(FileSystemIoBase::preamble_1_1, byteStructureMinorVersion));
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buffer[0] = bsmv;
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buffer[1] = this->HMV; |
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buffer[2] = this->hmv; |
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if (chSequentialStreamWrite((BaseFileStream*)&this->at24c01, buffer, 3) != 3) { |
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return IO_ERROR;
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} |
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if (!strict) {
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break;
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} |
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default:
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break;
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} |
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break;
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default:
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break;
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} |
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return OK;
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} |
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msg_t |
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FileSystemIoBase:: |
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resetMemory() {
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return initPreamble(this->BSMV, this->bsmv, true); |
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} |
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msg_t |
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FileSystemIoBase:: |
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getBoardId (uint8_t *buffer) {
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msg_t bytesRead = 0;
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// Work around, because stm32f1 cannot read a single byte
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const uint8_t bufferSize = 2; |
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uint8_t bufferTmp[bufferSize] = {};
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// Get the data out of the memory
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switch (this->BSMV) { |
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case 0x01u: |
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// Set the pointer to the address
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chFileStreamSeek((BaseFileStream*)&at24c01, offsetof(FileSystemIoBase::preamble_1_2, boardId)); |
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if (this->bsmv >= 0x02u) { |
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bytesRead = chSequentialStreamRead((BaseFileStream*)&at24c01, (uint8_t*) bufferTmp, bufferSize); |
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} else {
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return NOT_IMPLEMENTED;
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} |
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break;
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} |
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// Store only the board id
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*buffer = bufferTmp[0];
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if (bytesRead != bufferSize) {
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return IO_ERROR;
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} else {
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return OK;
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} |
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} |
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msg_t |
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FileSystemIoBase:: |
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setBoardId (uint8_t buffer) {
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msg_t bytesWritten = 0;
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const uint8_t bufferSize = sizeof(uint8_t); |
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// Get the data out of the memory
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switch (this->BSMV) { |
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case 0x01u: |
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// Set the pointer to the address
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chFileStreamSeek((BaseFileStream*)&at24c01, offsetof(FileSystemIoBase::preamble_1_2, boardId)); |
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if (this->bsmv >= 0x02u) { |
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bytesWritten = chSequentialStreamWrite((BaseFileStream*)&at24c01, (const uint8_t*) &buffer, bufferSize);
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} else {
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return NOT_IMPLEMENTED;
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} |
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break;
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} |
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if (bytesWritten != bufferSize) {
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return IO_ERROR;
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} else {
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return OK;
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} |
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} |