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For the drivetrain of a prototype vehicle you are asked to implement the part that determines the requested torque based on the user input. The user does this by pressing the throttle pedal. There are multiple options regarding the throttle pedal, but for now the engineers seem to have selected one that produces two analog output signals, which are connected to a microcontroller. The relation between the analog signals (redundant for safety reasons) and the pedal angle (min = 0 degrees, max = 30 degrees) are as follows: - `adc1 = 0.5 + 0.1 * angle` - `adc2 = 1.0 + 0.08 * angle` Where adc1 and adc2 are voltages and the angle is in degrees. These analog inputs require some basic low pass filtering (moving average). This pedal angle corresponds to an amount of torque that the motors must provide. This torque is not only dependent on the pedal angle, it’s also dependent on the current speed of the vehicle. The torque for each speed and pedal angle can be found in the graph below. ![pedal map](./doc/Pedalmap.png) In case something goes wrong, in our prototype an LED should light up on the dashboard to indicate something is wrong (in a real production vehicle an error message will be shown on the instrument cluster).
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Embedded Software Engineer

Interviewed at Lightyear

4.2★
Feb 1, 2021

For the drivetrain of a prototype vehicle you are asked to implement the part that determines the requested torque based on the user input. The user does this by pressing the throttle pedal. There are multiple options regarding the throttle pedal, but for now the engineers seem to have selected one that produces two analog output signals, which are connected to a microcontroller. The relation between the analog signals (redundant for safety reasons) and the pedal angle (min = 0 degrees, max = 30 degrees) are as follows: - `adc1 = 0.5 + 0.1 * angle` - `adc2 = 1.0 + 0.08 * angle` Where adc1 and adc2 are voltages and the angle is in degrees. These analog inputs require some basic low pass filtering (moving average). This pedal angle corresponds to an amount of torque that the motors must provide. This torque is not only dependent on the pedal angle, it’s also dependent on the current speed of the vehicle. The torque for each speed and pedal angle can be found in the graph below. ![pedal map](./doc/Pedalmap.png) In case something goes wrong, in our prototype an LED should light up on the dashboard to indicate something is wrong (in a real production vehicle an error message will be shown on the instrument cluster).

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