160 lines
3.6 KiB
C++
160 lines
3.6 KiB
C++
/**
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* See also BinarySensorLog.java
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* See also mlq_file_format.txt
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*/
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#include "pch.h"
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#include "binary_logging.h"
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#include "log_field.h"
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#include "buffered_writer.h"
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#include "tunerstudio.h"
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#if EFI_FILE_LOGGING || EFI_UNIT_TEST
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#define TIME_PRECISION 1000
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// floating number of seconds with millisecond precision
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static scaled_channel<uint32_t, TIME_PRECISION> packedTime;
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// The list of logged fields lives in a separate file so it can eventually be tool-generated
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#include "log_fields_generated.h"
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int getSdCardFieldsCount() {
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return efi::size(fields);
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}
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static constexpr uint16_t computeFieldsRecordLength() {
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uint16_t recLength = 0;
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for (size_t i = 0; i < efi::size(fields); i++) {
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recLength += fields[i].getSize();
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}
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return recLength;
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}
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static uint64_t binaryLogCount = 0;
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static const uint16_t recordLength = computeFieldsRecordLength();
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void writeFileHeader(Writer& outBuffer) {
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char buffer[MLQ_HEADER_SIZE];
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// File format: MLVLG\0
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strncpy(buffer, "MLVLG", 6);
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// Format version = 02
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buffer[6] = 0;
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buffer[7] = 2;
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// Timestamp
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buffer[8] = 0;
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buffer[9] = 0;
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buffer[10] = 0;
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buffer[11] = 0;
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// Info data start
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buffer[12] = 0;
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buffer[13] = 0;
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buffer[14] = 0;
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buffer[15] = 0;
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size_t headerSize = MLQ_HEADER_SIZE + efi::size(fields) * MLQ_FIELD_HEADER_SIZE;
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// Data begin index: begins immediately after the header
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buffer[16] = 0;
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buffer[17] = 0;
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buffer[18] = (headerSize >> 8) & 0xFF;
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buffer[19] = headerSize & 0xFF;
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// Record length - length of a single data record: sum size of all fields
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buffer[20] = recordLength >> 8;
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buffer[21] = recordLength & 0xFF;
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// Number of logger fields
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int fieldsCount = efi::size(fields);
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buffer[22] = fieldsCount >> 8;
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buffer[23] = fieldsCount;
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outBuffer.write(buffer, MLQ_HEADER_SIZE);
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// Write the actual logger fields, offset 22
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for (size_t i = 0; i < efi::size(fields); i++) {
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fields[i].writeHeader(outBuffer);
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}
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}
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static uint8_t blockRollCounter = 0;
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static void writeSdBlock(Writer& outBuffer) {
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static char buffer[16];
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// Offset 0 = Block type, standard data block in this case
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buffer[0] = 0;
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// Offset 1 = rolling counter sequence number
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buffer[1] = blockRollCounter++;
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// Offset 2, size 2 = Timestamp at 10us resolution
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efitimeus_t nowUs = getTimeNowUs();
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uint16_t timestamp = nowUs / 10;
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buffer[2] = timestamp >> 8;
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buffer[3] = timestamp & 0xFF;
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outBuffer.write(buffer, 4);
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// todo: add a log field for SD card period
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// prevSdCardLineTime = nowUs;
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packedTime = getTimeNowMs() * 1.0 / TIME_PRECISION;
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uint8_t sum = 0;
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for (size_t fieldIndex = 0; fieldIndex < efi::size(fields); fieldIndex++) {
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#if EFI_UNIT_TEST
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// dark magic: all elements of log_fields_generated.h were const-evaluated against 'nullptr' engine, let's add it!
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void *offset = fieldIndex == 0 ? nullptr : engine;
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#else
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void *offset = nullptr;
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#endif
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size_t entrySize = fields[fieldIndex].writeData(buffer, offset);
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for (size_t byteIndex = 0; byteIndex < entrySize; byteIndex++) {
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// "CRC" at the end is just the sum of all bytes
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sum += buffer[byteIndex];
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}
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outBuffer.write(buffer, entrySize);
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}
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buffer[0] = sum;
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// 1 byte checksum footer
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outBuffer.write(buffer, 1);
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}
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void writeSdLogLine(Writer& bufferedWriter) {
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#if EFI_PROD_CODE
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extern bool main_loop_started;
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if (!main_loop_started)
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return;
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#endif //EFI_PROD_CODE
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if (binaryLogCount == 0) {
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writeFileHeader(bufferedWriter);
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} else {
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updateTunerStudioState();
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writeSdBlock(bufferedWriter);
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}
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binaryLogCount++;
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}
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#if EFI_UNIT_TEST
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void resetFileLogging() {
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binaryLogCount = 0;
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blockRollCounter = 0;
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}
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#endif // EFI_UNIT_TEST
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#endif /* EFI_FILE_LOGGING */
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