An SPI communication with a thermal camera is being developed. For that it is needed to print in console the hex of the resulting array for debugging. This is the function prototype: Void print_hex(uint16_t * array_list); Implement the code to do the task in C.
- Ask about dimension of the array or the resolution of the thermal camera.
- Ask about if exist a EOF in the frame to indicated the end of the data.
For developing a Parking Meter solution, a Radar sensor is used to detect whther or not there is a car parked. The function used for getting the distance of the object in front of the sensor is the following:
p0.distance = getDistance(uRa0, PIN_PWR0, p0); // returns a float of the distance in meters
If there is no car, the distance will be iqual to -1. If the distance is between 1 and 2.5 meters there is a car. if the distance is different, it should be ignored.
A state machine is needed to know the current state of the parking. Those states are:
- Avaible_state: The distance in the sensor is -1
- Possible_Car_state: The distance is between 1 and 2.5 meters. The idea is to measure the sensor at least 3 times to be sure that there is a car, so it jump to the Car_state
- Car_state: The distance is between 1 and 2.5 meters
The prototype of the funtion needed is the following:
// The function return the current state (Availble_state. Possible_Car_state, Car_state) int current_parking_state(float distance);
Implement the function in C