Just wanted to sat thanks to Hippy and Craigcurtan for their suggestions in the last forum. Some tests this evening (with a stopwatch) showed that :-
sertxd without use of # takes a constant time each time round the loop which can be allowed for. The time did not vary if the download cable was plugged in or not.
That the i2c readings do not upset the timer.
Craigcurtan suggested using a clock chip to maintain constant loop time and I may eventually do this. He also suggested some eeprom storage and I have ordered an i2C version to experiment.
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sertxd without use of # takes a constant time each time round the loop which can be allowed for. The time did not vary if the download cable was plugged in or not.
That the i2c readings do not upset the timer.
Craigcurtan suggested using a clock chip to maintain constant loop time and I may eventually do this. He also suggested some eeprom storage and I have ordered an i2C version to experiment.
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