Frequent errors that may happen, from the initial creation of a program and onwards.
Strange timings: You declared an oscillator frequency, different from the oscillator actually attached to the micrcontroller.
No oscillator: Keep in mind that, besides the frequency, you must also set the type of oscillator, internal or external.
No GCBASIC frequency stated: If not declared in your source program - GCBASIC uses a preset frequency suitable for operating the microcontroller as the
fastest practical.
External oscillators: It must be explicitly stated, if not stated GCBASIC will attempt to setup the internal oscillator.
Ports: GCBASIC will set the ports automatically but you may need to set the ports outputs or inputs when needed.
Analog levels: When applied on the ports defined as digital inputs. can cause current consumption in the input buffer, which is outside
the device specifications. Beware.
Current drawn: Current taken from the microcontroller outputs, exceeding the maximum allowed (not all pins supply the same current). Beware
of drawing to much current.
Watchdog Timer (WDT): The WDT is a useful timer. Enable to reset the microcontroller when processing can get stuck in a loop.
Interrupts: A badly controlled interrupt (in some cases) will prevent the execution of the entire program.
No action: The circuit is not powered.
Still no action: The microcontroller is not present or different from the device you expected.
Still no action: The microcontroller inserted incorrectly in the appropriate socket.
Cannot program: Incorrect programmer, Incorrect programmer parameters or circuit connections are incorrect.
Still Cannot program: Values of excessively incorrect circuit resistances.
Serial Communcations: The TX and RX pins of the serial port are exchanged, and/or the connections with the level converter, ttl / rs232 or ttl
/ usb.
Stlll no Serial Communcations: Serial speed, different from the one set in the circuit with which it is intended to communicate or vice versa.
No I2C/TWI: SDL and/or SCL pin exchanged on the I2C/TWI bus connection, and/or no pull-up resistors, and/or no common 0 voltage.
Incorrect timing: Calculation of any timings related to the frequency of the external oscillator, without taking into account the division
by 4.
Strange Numeric Values: The variables declared are insufficient to contain the values to be processed.
