Declare an interrupt service routine $($ISR$)$ for the TCB$1$ peripheral

that was configured in Ex $7\mathrm{.}0.$

$1.$ Find the vector number and name that correspond to the TCB$1$ CAPT

interrupt. $//250$x$32$ TCB$1\_$INT

Refer to datasheet Section $8\mathrm{.}2$ Interrupt Vector Mapping on p$.63.$

$2.$ Find the corresponding vector definition in "iotn$1626.$h$".$ This will

look like $*\_$vect and should correspond to the vector number

identified in step $1.$ TCB$1\_$INT$\_$vect $\_$VECTOR$(25)$

$3.$ Declare an ISR using the ISR$()$ macro syntax, where

is the vector definition identified in step $2.$

$4.$ If the stopwatch is currently counting, increment the "elapsed$\_$time"

variable by $1.$ Ensure that this variable does not exceed the value

which represents $15\mathrm{.}9375$ s $($i$.$e$.,0$xFF $*1/16$ s$).$

$5.$ Update the $7-$segment display to reflect the value of "elapsed$\_$time".

$6.$ Acknowledge that the interrupt has been handled by clearing the CAPT

bit in the TCB$1.$INTFLAGS register.

Refer to datasheet Section $22\mathrm{.}5\mathrm{.}5$ Interrupt Flags on p$.260$ for

information on how to clear this bit.

NOTE: You may use display$\_$hex$()$ to display a number in hexadecimal on

the $7-$segment display. This function accepts an unsigned $8-$bit integer.

NOTE: As this interrupt is invoked every $64$th of a second, the value in

"elapsed$\_$time" will not represent a count of $16$ths of a second.

You will need to use the following relationship to display the correct

value on the $7-$segment display:

$1/16$ second $=4*1/64$ second