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EEPROM format heuristics

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This commit is contained in:
Harald Barth 2021-07-25 22:53:20 +02:00
parent 7206e46273
commit c15d5048b5
2 changed files with 44 additions and 8 deletions
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33
Outputs.cpp
View File

@ -127,8 +127,36 @@ bool Output::remove(uint16_t n){
///////////////////////////////////////////////////////////////////////////////
void Output::load(){
struct OutputData data;
struct BrokenOutputData bdata;
Output *tt;
bool isBroken=1;
// This is a scary kluge. As we have two formats in EEPROM due to an
// earlier bug, we don't know which we encounter now. So we guess
// that if in all entries this byte has value of 7 or lower this is
// an iFlag and thus the broken format. Otherwise it would be a pin
// id. If someone uses only pins 0 to 7 of their arduino, they
// loose. This is (if you look at an arduino) however unlikely.
for(int i=0;i<EEStore::eeStore->data.nOutputs;i++){
EEPROM.get(EEStore::pointer()+ i*sizeof(struct BrokenOutputData),bdata);
if (bdata.iFlag > 7) { // it's a pin and not an iFlag!
isBroken=0;
break;
}
}
if ( isBroken ) {
for(int i=0;i<EEStore::eeStore->data.nOutputs;i++){
EEPROM.get(EEStore::pointer(),bdata);
tt=create(bdata.id,bdata.pin,bdata.iFlag);
tt->data.oStatus=bitRead(tt->data.iFlag,1)?bitRead(tt->data.iFlag,2):bdata.oStatus; // restore status to EEPROM value is bit 1 of iFlag=0, otherwise set to value of bit 2 of iFlag
digitalWrite(tt->data.pin,tt->data.oStatus ^ bitRead(tt->data.iFlag,0));
pinMode(tt->data.pin,OUTPUT);
tt->num=EEStore::pointer();
EEStore::advance(sizeof(struct OutputData));
}
} else {
struct OutputData data;
for(int i=0;i<EEStore::eeStore->data.nOutputs;i++){
EEPROM.get(EEStore::pointer(),data);
@ -137,7 +165,8 @@ void Output::load(){
digitalWrite(tt->data.pin,tt->data.oStatus ^ bitRead(tt->data.iFlag,0));
pinMode(tt->data.pin,OUTPUT);
tt->num=EEStore::pointer();
EEStore::advance(sizeof(tt->data));
EEStore::advance(sizeof(struct OutputData));
}
}
}

7
Outputs.h
View File

@ -28,6 +28,13 @@ struct OutputData {
uint8_t iFlag;
};
struct BrokenOutputData {
uint8_t oStatus;
uint8_t id;
uint8_t pin;
uint8_t iFlag;
};
class Output{
public: