How long between sys tick interrupts given the following sys tick interrupt initialization? Assume the system clock is 48MHz. void syst_tick_init(void) { SYST: RVR=0x50000; SYST_CVR=0; SYST_CSR=0x7; } 3.81 ms 1 ms 7.9 ms 380,928 ms QUESTION 2 What is wrong with the sequence of events when an interrupt occurs? . Set interrupt flag bits Finish current operation Load all the CPU registers on the stack, including the current program pointer Go to the assigned interrupt vector (see table) and find a new program pointer That pointer should point to the location in memory of the interrupt handler Do the handler Proceed as normal . it forgot to clear the SYS_RVR register it forgot to push the CPU registers onto the stack if forgot to clear interrupt flags and reload the CPU registers it forgot the gpio initialization? QUESTION 3 You want to build an application that uses a port interrupt attached to pB2. The code will blink led 1 at 5Hz is PB1 is pushed and led1 at 10Hz if pB2 is pushed. As usual you first create a flowchart, as shown below. Right off the bat you know something is wrong because: Main inits led1 on/off 5HZ PB1? PB2? led1 on/off 10Hz there is a logical connection between the main loop and the action from pB2 which is supposed to be an interrupt. there is no debounce added to either PB it needs a while loop to make sure its edge sensitive for pB2. pB2 is queried by an if statement when it should be an else if statement