$4.(20$ pts$)$ Consider the GPIO memory map of STM$32$L$476.$

$(1)(2$ pts$)$ What is the numeric value of the memory address of the mode register of PE$,$ i$.$e$.,$ GPIO

Port E$?$

$(2)(2$ pts$)$ What is the numeric value of the memory address of the ODR of PE$,$ i$.$e$.,$ GPIO Port E$?$

$(3)(8$ pts$)$ Write C code to set PE$\mathrm{.}3$ and PE$7$ as digital output pin, without modifying any other bits in

the registers in your code.

$(4)(4$ pts$)$ What values should we put into the following mode register to set both PE$\mathrm{.}3$ and PE$7$ as

digital output pin?

Register

$31$

$30$

$29$

$28$

$27$

$26$

$25$

$24$

$23$

$22$

$21$

$20$

$19$

$18$

$17$

$16$

$15$

$14$

$13$

$12$

$11$

$10$

$9$

$8$

$7$

$6$

$5$

$4$

$3$

$2$

$1$

$0$

Value

$(5)(4$ pts$)$ Write C code to set PE$\mathrm{.}3$s output type as push$-$pull, and PE$7$s output type as open$-$drain,

without modifying any other bits in the registers in your code