SPI.c

void debug_printActiveBeacons(void)

prints ActivatedBeacons array

prints curBeaconIndex

void SPI_skipCurTarget(void)

increments the curBeaconIndex in ActivatedBeacons array

char SPI_getCurTarget(void)

returns the current active target from the index in the ActivatedBeacons array

char SPI_isCurTargetHit(void)

returns TRUE or FALSE from variable isCurBeaconHit (changed in function SPI_getStatus)

void SPI_requestTargetStatus(void)

set requestedTargetStatus = TRUE

set unreadTargetStatus = FALSE

void SPI_Init(void)

Start MyTimer_Init

Set Baud rate to 12.2kHz

Initialize CPOL and CPHA bits in SPICR1

Enable master

Enable SPI

Set MSB transfer first

Set SS to SlaveSelectOutput with SSOE and MODFEN

Set lastCmd = 0xAA

Set receivedByte = 0xDE;

Start LED blinking to flash between the red and green LED

Set lastActiveBeaconIndex = 0

Set curBeaconIndex = 0

Set isCurBeaconHit to FALSE

unsigned char firstLetter(unsigned char inByte)

Determine the firstLetter of the receivedByte by dividing by 16

unsigned char lastLetter(unsigned char inByte)

Determine the lastLetter of the receivedByte by mod 16

void WriteByte(unsigned char myByte)

If currently writing a good byte (curWriteGood = TRUE)

Check the read flag

Read the good received byte

After 11ms

Check the write flag

Write out the good byte to SPI

Set curWriteGood to FALSE

Else if currently writing a bad byte

Check the read flag

Read the bad byte into a temp variable

After 11ms

Check the write flag

Write out bad byte to SPI

Set curWriteGood to TRUE

SPI_Status_t SPI_getStatus(void)

Switch state:

GAME OVER:

Return GAME OVER

ERROR:

Return ERROR

DELAY

Send 0xAA into WriteByte until response is not 0xDE

READY

WriteByte (either 0xAA or 0xEx)

If receivedByte = 0xFB “busy”, do nothing

Else

Switch state:

C = active beacon

If a new target is assigned

Increment lastActiveBeaconIndex

Add the new target number into ActivatedBeacons array

Set state to READY

D = delay or game over

If lastLetter = E, state is DELAY

Else, state is GAME OVER

5 or 6 = beacon is active

Set isCurBeaconHit to FALSE and not hit

Set requestedTargetStatus to FALSE

Set unreadTargetStatus to TRUE

7 or 8 = beacon has been hit

Set requestedTargetStatus to FALSE

Set unreadTargetStatus to TRUE

Set isCurBeaconHit to TRUE and hit

Increment curBeaconIndex to get the next activated beacon

Set state to READY

F

Set state to ERROR

If requestedTargetStatus is TRUE (when set in Main after hitting the beacon)

Send 0xEx to TC

Else, send 0xAA to TC

If state is READY and unreadTargetStatus is TRUE, return READY

Else, return the state