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Bugfix: allocate enough bytes for digital pins. Add more sanity checks when allocating memory

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This commit is contained in:
Harald Barth 2024-01-18 08:20:33 +01:00
parent 95bf5aae38
commit 3c0704dbd1
1 changed files with 24 additions and 9 deletions
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27
IO_EXIOExpander.h
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@ -100,8 +100,14 @@ private:
if (_digitalPinBytes < digitalBytesNeeded) {
// Not enough space, free any existing buffer and allocate a new one
if (_digitalPinBytes > 0) free(_digitalInputStates);
_digitalInputStates = (byte*) calloc(_digitalPinBytes, 1);
if ((_digitalInputStates = (byte*) calloc(digitalBytesNeeded, 1)) != NULL) {
_digitalPinBytes = digitalBytesNeeded;
} else {
DIAG(F("EX-IOExpander I2C:%s ERROR alloc %d bytes"), _I2CAddress.toString(), digitalBytesNeeded);
_deviceState = DEVSTATE_FAILED;
_digitalPinBytes = 0;
return;
}
}
}
@ -117,7 +123,16 @@ private:
_analogueInputStates = (uint8_t*) calloc(analogueBytesNeeded, 1);
_analogueInputBuffer = (uint8_t*) calloc(analogueBytesNeeded, 1);
_analoguePinMap = (uint8_t*) calloc(_numAnaloguePins, 1);
if (_analogueInputStates != NULL &&
_analogueInputBuffer != NULL &&
_analoguePinMap != NULL) {
_analoguePinBytes = analogueBytesNeeded;
} else {
DIAG(F("EX-IOExpander I2C:%s ERROR alloc analog pin bytes"), _I2CAddress.toString());
_deviceState = DEVSTATE_FAILED;
_analoguePinBytes = 0;
return;
}
}
}
} else {
@ -364,14 +379,14 @@ private:
uint8_t _minorVer = 0;
uint8_t _patchVer = 0;
uint8_t* _digitalInputStates;
uint8_t* _analogueInputStates;
uint8_t* _analogueInputBuffer; // buffer for I2C input transfers
uint8_t* _digitalInputStates = NULL;
uint8_t* _analogueInputStates = NULL;
uint8_t* _analogueInputBuffer = NULL; // buffer for I2C input transfers
uint8_t _readCommandBuffer[1];
uint8_t _digitalPinBytes = 0; // Size of allocated memory buffer (may be longer than needed)
uint8_t _analoguePinBytes = 0; // Size of allocated memory buffers (may be longer than needed)
uint8_t* _analoguePinMap;
uint8_t _analoguePinBytes = 0; // Size of allocated memory buffer (may be longer than needed)
uint8_t* _analoguePinMap = NULL;
I2CRB _i2crb;
enum {RDS_IDLE, RDS_DIGITAL, RDS_ANALOGUE}; // Read operation states