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Update IO_EXIOExpander.h

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Avoid repeated error messages for a single fault.
This commit is contained in:
Neil McKechnie 2023-03-18 15:30:14 +00:00
parent e55dc51bdb
commit c4b4e11a67
1 changed files with 22 additions and 20 deletions
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42
IO_EXIOExpander.h
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@ -210,29 +210,31 @@ private:
// Request block is used for analogue and digital reads from the IOExpander, which are performed
// on a cyclic basis. Writes are performed synchronously as and when requested.
if (_i2crb.isBusy()) return; // If I2C operation still in progress, return
if (_readState != RDS_IDLE) {
if (_i2crb.isBusy()) return; // If I2C operation still in progress, return
uint8_t status = _i2crb.status;
if (status == I2C_STATUS_OK) { // If device request ok, read input data
uint8_t status = _i2crb.status;
if (status == I2C_STATUS_OK) { // If device request ok, read input data
// First check if we need to process received data
if (_readState == RDS_ANALOGUE) {
// Read of analogue values was in progress, so process received values
// Here we need to copy the values from input buffer to the analogue value array. We need to
// do this to avoid tearing of the values (i.e. one byte of a two-byte value being changed
// while the value is being read).
memcpy(_analogueInputValues, _analogueInputBuffer, _analoguePinBytes); // Copy I2C input buffer to states
_readState = RDS_IDLE;
// First check if we need to process received data
if (_readState == RDS_ANALOGUE) {
// Read of analogue values was in progress, so process received values
// Here we need to copy the values from input buffer to the analogue value array. We need to
// do this to avoid tearing of the values (i.e. one byte of a two-byte value being changed
// while the value is being read).
memcpy(_analogueInputValues, _analogueInputBuffer, _analoguePinBytes); // Copy I2C input buffer to states
} else if (_readState == RDS_DIGITAL) {
// Read of digital states was in progress, so process received values
// The received digital states are placed directly into the digital buffer on receipt,
// so don't need any further processing at this point (unless we want to check for
// changes and notify them to subscribers, to avoid the need for polling - see IO_GPIOBase.h).
_readState = RDS_IDLE;
}
} else
reportError(status, false); // report eror but don't go offline.
} else if (_readState == RDS_DIGITAL) {
// Read of digital states was in progress, so process received values
// The received digital states are placed directly into the digital buffer on receipt,
// so don't need any further processing at this point (unless we want to check for
// changes and notify them to subscribers, to avoid the need for polling - see IO_GPIOBase.h).
}
} else
reportError(status, false); // report eror but don't go offline.
_readState = RDS_IDLE;
}
// If we're not doing anything now, check to see if a new input transfer is due.
if (_readState == RDS_IDLE) {