You must design the solution in ARM assembly programming, using loops, addressing modes, and a variety of data manipulation techniques. This assignment will require thinking through logical control flow, efficient memory management, and basic real$-$time monitoring.

Problem Breakdown and Requirements

Part $1$: Temperature Regulation System

The factory's high$-$temperature ovens are running too hot. They need a system to gradually cool them down by a fixed number of degrees until they reach a safe operating temperature. The oven starts at $\backslash (500^\{\backslash$circ$\}\backslash$mathrm$\{$C$\}\backslash ),$ and it must be reduced by $\backslash (5^\{\backslash$circ$\}\backslash$mathrm$\{$C$\}\backslash )$ every second until it hits a safe level of $\backslash (150^\{\backslash$circ$\}\backslash$mathrm$\{$C$\}\backslash ).$ For each temperature reduction, the new temperature needs to be stored in memory and checked against the threshold.

Implement a loop that reduces the temperature by $\backslash (5^\{\backslash$circ$\}\backslash$mathrm$\{$C$\}\backslash )$ every second. Use addressing modes to store each new temperature in a memory location. If the temperature hits $\backslash (150^\{\backslash$circ$\}\backslash$mathrm$\{$C$\}\backslash ),$ exit the loop. When done, display the final safe temperature by moving it into a register.

Part $2$: Robotic Conveyor Belt Timing

The robotic conveyor belt is tasked with packaging items. The belt needs to process $15$ items. Each item takes a different amount of time to package due to size variations. The first item takes $2$ seconds, the next item takes $4$ seconds, the third takes $6$ seconds, and so on $($incrementing by $2$ seconds each time$).$ Once all the items are processed, the conveyor should stop, and a signal should be sent $($indicated by setting a register$).$

Create a loop that simulates the conveyor belt processing the $15$ items. Use addressing mode to track each item's time requirement $($store each item's processing time in memory$).$ After processing all items, output the total time taken for all items combined. Trigger a signal $($set a register to $1)$ once all items are processed.