C3MA/PlantCtrl
5
0
Fork 0
Code Issues 8 Pull Requests Packages Projects Releases Wiki Activity

retry on crc error for onewire

Browse Source
This commit is contained in:
Your Name
2021-05-27 21:43:15 +02:00
parent 3d45a3fca3
commit 057e2b37c3
3 changed files with 64 additions and 40 deletions
Download Patch File Download Diff File Expand all files Collapse all files

37
esp32/src/DS2438.cpp
View File

@@ -24,9 +24,10 @@
#define DS2438MODEL 0x26
DS2438::DS2438(OneWire *ow, float currentShunt = 1.0f) {
DS2438::DS2438(OneWire *ow, float currentShunt, int retryOnCRCError) {
_ow = ow;
_currentShunt = currentShunt;
_retryOnCRCError = retryOnCRCError;
};
void DS2438::begin(){
@@ -234,22 +235,26 @@ void DS2438::writePage(int page, uint8_t *data) {
}
boolean DS2438::readPage(int page, uint8_t *data) {
//TODO if all data is 0 0 is a valid crc, but most likly not as intended
_ow->reset();
_ow->select(_address);
_ow->write(DS2438_RECALL_MEMORY_COMMAND, 0);
if ((page >= PAGE_MIN) && (page <= PAGE_MAX)) {
bool valid = false;
for(int retry = 0;retry < this->_retryOnCRCError && !valid; retry ++){
//TODO if all data is 0 0 is a valid crc, but most likly not as intended
_ow->reset();
_ow->select(_address);
_ow->write(DS2438_RECALL_MEMORY_COMMAND, 0);
if ((page >= PAGE_MIN) && (page <= PAGE_MAX)) {
_ow->write(page, 0);
} else {
return false;
}
_ow->reset();
_ow->select(_address);
_ow->write(DS2438_READ_SCRATCHPAD_COMMAND, 0);
_ow->write(page, 0);
} else {
return false;
for (int i = 0; i < 9; i++){
data[i] = _ow->read();
}
valid = _ow->crc8(data, 8) == data[8];
}
_ow->reset();
_ow->select(_address);
_ow->write(DS2438_READ_SCRATCHPAD_COMMAND, 0);
_ow->write(page, 0);
for (int i = 0; i < 9; i++){
data[i] = _ow->read();
}
return _ow->crc8(data, 8) == data[8];
return valid;
}