Bidirectional communication is enabled on the SPI bus with the SCLK idling low, data latched in on the rising edge of the clock, MSB transmitted first, the SS pin is manually controlled, and interrupts are

disabled.

a$.$ What are the values of the SPIxCR$1$ and SPIxCR$2$ for the settings defined above?

b$.$ Provide two settings for the SPIxBR register for a $3\mathrm{.}125$ MHz Baud rate when the system clock is

$25$ MHz$.$

c$.$ Provide the code $($in C$)$ to initialize SPI$2$ at these setting with the interrupts disabled.

d$.$ Write a function $$putByteSPI$2$ to transmit a single character on SPI$2$ and another function

$$putArraySPI$2$ to send a string of characters. Use polling to see if SPI$2$ is ready for transmission

and a blocking routine is okay for this exercise.