Write s program using an Interrupt Service Routine that does the following :

Q3. [8 marks] Write a program using an Interrupt Service Routine that does the following : Waits for a Single High Pulse of 200 ms,on Pin OC1. When the High Pulse goes from High to low, it turns ON the LED at Port A,RA0 and the LED then stays on. You will use the Output Compare OC1, Dual Compare mode with a Single High Pulse (OCM=004). You will use Timer 2 for the OC with a pre-scale value of 256 . You need to setup OC1RS and OC1R such that OC1RS - OC1R =200ms We need to convert 200m into Timer Clock Cycles. We have Timer 2 with a 80Mbz PBClk and a Precale, of 256. We will use the PR formula for the Timer delay from before. 200ms=(PR+1)/(pBLCK/256)20010(3)=(PR+1)/(80106/256)) instead of PR+1 we will call this value X. X=20010(3)(8010n6/256)=62,500 slk, cycles Hence 200ms=62,500 clk, cycles. To make OC1RS- OC1R =62,500 clk cycles , We need to make OC1R some value >0, so we will make OC1R= 1 and OC1RS =62,501. Now OC1RS-OC1R = 62,5011=62,500 Hence OC1R =1 OC1RS =62,501 You will set the ISR Routine of OC1 to turn on the LED at RA0. Because this is a Single Pulse, this will Interrupt will run only once. You do not need to include any \#pragma compiler directive (the DEVCFG initial setup)