The 4 digital pins of the RevPi MIO can be used flexibly as inputs or outputs and in various operating modes. In the following examples, you will configure them in PiCtory.

▷ Starting PiCtory.

Using Digital Input for Level Detection #

▷ Set in the Value Editor IO_Mode_1 to digitalIn.

▷ Restart the driver to apply the changes.

❯ The digital level is displayed at DigitalInput_1.

Using Digital Input for PWM Measurement #

▷ In the Value Editor, set IO_Mode_1 to pwmIn.

▷ If necessary, configure the duty cycle at PwmDutycycle_1.

▷ Restart the driver to apply the changes.

❯ The frequency and duty cycle are displayed at Fpwm_PulseCount_1 .

Note

If no edge is detected for longer than 10 seconds, PwmDutycycle_1 and Fpwm_PulseCount_1 display the value 0.

Using Digital Input for Pulse Measurement #

▷ In the Value Editor, set IO_Mode_1 to pulseIn.

▷ Restart the driver to apply the changes.

❯❯ The pulse length is displayed at DutyCycle_PulseLength_1.

❯❯ The number of pulses is displayed in the Fpwm_PulseCount_1 field.

Using Digital Output for PWM Output #

▷ In the Value Editor, set IO_Mode_1 to pwmOut.

▷ Set the PWM frequency at FpwmOut_12.

▷ Set the duty cycle at PwmDutycycle_1.

▷ Restart the driver to apply the changes.

❯❯ A PWM signal is displayed at the output.

Using Digital Output for Pulse Output #

▷ In the Value Editor, set IO_Mode_1 to pulseOut.

▷ Optional: activate PulseMode = 1 for the retrigger mode (if you want to start several pulses in quick succession).

▷ Set the pulse length under Dutycycle_Pulselength_1.

▷ Restart the driver to apply the changes.

▷ Set DigitalOutput_1 to 1 to start the pulse.

Without retrigger mode: A pulse runs out completely before a new one can be started. DigitalOutput_1 must be reset to 0 before each new pulse.

With retrigger mode: A new pulse can be started immediately, even if the previous pulse is still running. Every new impulse restarts its predecessor.

Using Digital Output for Level Output #

▷ In the Value Editor IO_Mode_1 set to Output.

▷ Restart the driver to apply the changes.

❯ Set DigitalOutput_1 to 0 (low) or 1 (high) to control the level.