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SD logging: calculating sum on the fly

This commit is contained in:
rusefillc 2022-10-11 23:31:47 -04:00
parent afe646d88d
commit cb1b79a9ef
1 changed files with 8 additions and 7 deletions
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15
firmware/console/binary_log/binary_logging.cpp
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@ -125,8 +125,14 @@ size_t writeBlock(char* buffer) {
// Offset 4 = field data
const char* dataBlockStart = buffer + 4;
char* dataBlock = buffer + 4;
for (size_t i = 0; i < efi::size(fields); i++) {
size_t entrySize = fields[i].writeData(dataBlock);
uint8_t sum = 0;
for (size_t fieldIndex = 0; fieldIndex < efi::size(fields); fieldIndex++) {
size_t entrySize = fields[fieldIndex].writeData(dataBlock);
for (size_t byteIndex = 0; byteIndex < entrySize; byteIndex++) {
// "CRC" at the end is just the sum of all bytes
sum += dataBlock[byteIndex];
}
// Increment pointer to next entry
dataBlock += entrySize;
@ -134,11 +140,6 @@ size_t writeBlock(char* buffer) {
size_t dataBlockSize = dataBlock - dataBlockStart;
// "CRC" at the end is just the sum of all bytes
uint8_t sum = 0;
for (size_t i = 0; i < dataBlockSize; i++) {
sum += dataBlockStart[i];
}
*dataBlock = sum;
// Total size has 4 byte header + 1 byte checksum