In our class meeting, we have discussed how to use EXTI interrupt to detect the push button signal (GPIO pin PC 13) and toggle the green LED (GPIO pin PA 5) when the button is pressed. Answer the following questions will help you enable external interrupts (EXTI) to detect a signal event external to the microcontroller. Please provide your answer in C/C++ language (Without the APIs from Mbed system). 1. To enable an interrupt, software needs to enable the interrupt. Software needs to perform two operations: enable the corresponding interrupt of the Cortex-M interrupt controller (NVIC), and enable the interrupt of the corresponding peripheral (set the Interrupt Mask Register). If only one of them is performed, the interrupt is not enabled. Find out the corresponding operations that software must perform to enable an EXTI interrupt on the GPIO pin PC 13, which is connected to the push button. 2. What is the name of the interrupt handler corresponding to EXTI 13? (Provides the function/subroutine name) 3. How to program the SYSCFG external interrupt configuration registers (SYSCFG_EXTICR) to map EXTI 13 to GPIO pin PC 13? The push-button is connected to PC 13.

display the first three characters on the left from the TYPE column

Which of the following symbol is used in relative cell renference Select one: a. = b. * c. + d. None of the given choices are correct

Match the correct Base number with the type of numbers. > > > 0-7 0 and 1 0-9 and A-F 0-9 1. Base 2 2. Base 16 3. Base 10 4. Base 8

The following number is a BASE-3 NUMBER. Convert this to a base 10 number and enter your answer in the box.122222(Remember, the above number is in Base 3!)