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ve.diect with hex asnync messages

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ignore async hex messeage on older devices
This commit is contained in:
helgeerbe 2023-04-17 22:18:20 +02:00
parent 40cee1f9ca
commit b8e06bf824
2 changed files with 30 additions and 9 deletions
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33
lib/VeDirectFrameHandler/VeDirectFrameHandler.cpp
View File

@ -60,6 +60,7 @@ VeDirectFrameHandler::VeDirectFrameHandler() :
_state(IDLE),
_checksum(0),
_textPointer(0),
_hexSize(0),
_name(""),
_value(""),
_tmpFrame(),
@ -99,7 +100,9 @@ void VeDirectFrameHandler::rxData(uint8_t inbyte)
{
//if (mStop) return;
if ( (inbyte == ':') && (_state != CHECKSUM) ) {
_state = RECORD_HEX;
_prevState = _state; //hex frame can interrupt TEXT
_state = RECORD_HEX;
_hexSize = 0;
}
if (_state != RECORD_HEX) {
_checksum += inbyte;
@ -177,10 +180,7 @@ void VeDirectFrameHandler::rxData(uint8_t inbyte)
break;
}
case RECORD_HEX:
if (hexRxEvent(inbyte)) {
_checksum = 0;
_state = IDLE;
}
_state = hexRxEvent(inbyte);
break;
}
}
@ -279,10 +279,27 @@ void VeDirectFrameHandler::logE(const char * module, const char * error) {
/*
* hexRxEvent
* This function included for continuity and possible future use.
* This function records hex answers or async messages
*/
bool VeDirectFrameHandler::hexRxEvent(uint8_t inbyte) {
return true; // stubbed out for future
int VeDirectFrameHandler::hexRxEvent(uint8_t inbyte) {
int ret=RECORD_HEX; // default - continue recording until end of frame
switch (inbyte) {
case '\n':
// restore previous state
ret=_prevState;
break;
default:
_hexSize++;
if (_hexSize>=VE_MAX_HEX_LEN) { // oops -buffer overflow - something went wrong, we abort
logE(MODULE,"hexRx buffer overflow - aborting read");
_hexSize=0;
ret=IDLE;
}
}
return ret;
}
bool VeDirectFrameHandler::isDataValid() {

6
lib/VeDirectFrameHandler/VeDirectFrameHandler.h
View File

@ -23,6 +23,8 @@
#define VE_MAX_NAME_LEN 9 // VE.Direct Protocol: max name size is 9 including /0
#define VE_MAX_VALUE_LEN 33 // VE.Direct Protocol: max value size is 33 including /0
#define VE_MAX_HEX_LEN 100 // Maximum size of hex frame - max payload 34 byte (=68 char) + safe buffer
typedef struct {
uint16_t PID; // product id
@ -69,12 +71,14 @@ private:
void textRxEvent(char *, char *);
void frameEndEvent(bool); // copy temp struct to public struct
void logE(const char *, const char *);
bool hexRxEvent(uint8_t);
int hexRxEvent(uint8_t);
//bool mStop; // not sure what Victron uses this for, not using
int _state; // current state
int _prevState; // previous state
uint8_t _checksum; // checksum value
char * _textPointer; // pointer to the private buffer we're writing to, name or value
int _hexSize; // length of hex buffer
char _name[VE_MAX_VALUE_LEN]; // buffer for the field name
char _value[VE_MAX_VALUE_LEN]; // buffer for the field value
veStruct _tmpFrame{}; // private struct for received name and value pairs