fastgrandad
New Member
My 18M2 project requires seven digital inputs, any one of which going 'low' generates a predetirmined DAC voltage. It broadly works but the reassigned serial input (pin3, C.4) behaves oddly.
The program includes a 'disconnect' statement and the pin has a 10k pull-up resistor to +5V, as have all the other available inputs. When the program runs none of the inputs function correctly until I momentarily ground pin 3 after which it runs correctly and all seven input pins function as expected. I suspect it puts itself into some sort of loop as the DAC output is not as defined and the meter is reading an average DAC voltage, but I don't have a 'scope to look.
There are several workarounds including using the B pins as inputs instead of the C pins or move up to a 20M2 but I'm curious as to whether there is a way overcoming the issue.
The program includes a 'disconnect' statement and the pin has a 10k pull-up resistor to +5V, as have all the other available inputs. When the program runs none of the inputs function correctly until I momentarily ground pin 3 after which it runs correctly and all seven input pins function as expected. I suspect it puts itself into some sort of loop as the DAC output is not as defined and the meter is reading an average DAC voltage, but I don't have a 'scope to look.
There are several workarounds including using the B pins as inputs instead of the C pins or move up to a 20M2 but I'm curious as to whether there is a way overcoming the issue.