Race Car Timer not working on PIC

[JLeith]

Hello All

I have a very simple race car start timer. It is working in Flowcode but not in the PIC16F1827 ?

My Grandson's were asking if I could build a timer for there race car set.

I have posted my Drawing and Flowcode

Maybe I'm missing something simple.

John

[medelec35]

Hi John,
The issues I have spotted are:
1) You have not got a 19.6608 MHz crystal connected on your diagram yet Flowcode is configured as though there is one.
i.e within configuration settings osc is set to HS and not internal osc as the addition of osccon c code block suggests it should be.
If that is the case then clock speed should match the osccon value (0xf0 = 8MHz or 32MHz if pll is enabled)
2) You must have any I/o inputs tied to +5V or 0V via a pull-up or pull-down resistor e.g 2k2 to 10K.
If switch is to pull pin high then a pull-down resistor is required.
If switch is to pull pin low then a pull-up resistor or internal pull-up is required.

Martin

[JLeith]

Hello Martin

I thought I had checked everything from my old and very old notes but as the day is long I forgot about the OSC and the Bias resistor.

Corrected then and my Grand kids really enjoyed the action of the simple timer. My first Flowcode 6.

Thank you for your help.