Error detection on integrated circuit input/output pins

A control circuit comprising:

• an integrated circuit including a microprocessor operable to execute instructions to detect errors on an input/output pin of the integrated circuit, the input/output pin of the integrated being linked to an input node,
• a first resistor connected to the input node and receiving an input signal, including a first value, in an input mode,
• a second resistor connected between a reference voltage and the input node
• a third resistor connected between a zero voltage and the input node,
• wherein, when executed by the microprocessor, the instructions cause a light emitting diode driving circuit to perform a process comprising:
• using the input/output pin of the integrated circuit in the input mode by receiving a first value;
• toggling the input/output pin in a test mode after each of a plurality of instances of using the input/output pin in the first mode,
• wherein the test mode comprises using the input/output pin at an output providing a second value, different from the first value, during a set time after using the input/output pin in the input mode, receiving back on the input/output pin, during the set time a resulting value based on providing the second value and using the first, second and third resistors, measuring the resulting value, measuring the resulting value, and identifying an error on the input/output pin of the microprocessor based on the measured resulting value by comparing the resulting value and the second value;
• and
• wherein the identified error indicates that the input/output pin of the integrated circuit is stuck in a high/low level or if the first value includes a multiplexer addressing error.