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DataFlash: prevent the dataflash erase problem

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only allow writes to dataflash block devices once StartNewLog() has
been called
This commit is contained in:
Andrew Tridgell 2013-05-14 16:27:27 +10:00
parent e843bf3dfd
commit 411e940342
3 changed files with 8 additions and 2 deletions
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7
libraries/DataFlash/DataFlash_Block.cpp
View File

@ -37,7 +37,7 @@ void DataFlash_Block::FinishWrite(void)
void DataFlash_Block::WriteBlock(const void *pBuffer, uint16_t size)
{
if (!CardInserted()) {
if (!CardInserted() || !log_write_started) {
return;
}
while (size > 0) {
@ -163,7 +163,9 @@ void DataFlash_Block::EraseAll()
hal.scheduler->delay(100);
StartWrite(df_NumPages+1);
uint32_t version = DF_LOGGING_FORMAT;
log_write_started = true;
WriteBlock(&version, sizeof(version));
log_write_started = false;
FinishWrite();
hal.scheduler->delay(100);
}
@ -173,8 +175,9 @@ void DataFlash_Block::EraseAll()
*/
bool DataFlash_Block::NeedErase(void)
{
uint32_t version;
uint32_t version = 0;
StartRead(df_NumPages+1);
ReadBlock(&version, sizeof(version));
StartRead(1);
return version != DF_LOGGING_FORMAT;
}

1
libraries/DataFlash/DataFlash_Block.h
View File

@ -53,6 +53,7 @@ private:
uint16_t df_Read_PageAdr;
uint16_t df_FileNumber;
uint16_t df_FilePage;
bool log_write_started;
/*
functions implemented by the board specific backends

2
libraries/DataFlash/LogFile.cpp
View File

@ -58,6 +58,7 @@ uint16_t DataFlash_Block::start_new_log(void)
SetFileNumber(1);
StartWrite(1);
//Serial.println("start log from 0");
log_write_started = true;
return 1;
}
@ -78,6 +79,7 @@ uint16_t DataFlash_Block::start_new_log(void)
SetFileNumber(new_log_num);
StartWrite(last_page + 1);
}
log_write_started = true;
return new_log_num;
}