/* --------- SPI --------- */
void SPI_MasterInit(void) {
MOSI_DIR(OUT);
SCK_DIR(OUT);
// Set MOSI and SCK output, all others input
SPCR = _BV(SPE) | _BV(MSTR) | _BV(SPR0);
/*
Enable SPI, Master, set clock rate fck/16
Page 140
SPI Control Register – SPCR
Bit 6 – SPE: SPI Enable
Bit 4 – MSTR: Master/Slave Select
(This bit selects Master SPI mode when written to one)
Bits 1, 0 – SPR1, SPR0: SPI Clock Rate Select 1 and 0
Relationship Between SCK and the Oscillator Frequency
fsck = fosc/16;
*/
}
/*
Main function.
*/
int main(void)
{
SET(DDRD, _BV(PD7), ON);
LCD_CD_DIR(OUT);
SCK_DIR(OUT);
MOSI_DIR(OUT);
MISO_DIR(IN);
LCD_CS_SET(OFF);
FRAM_HOLD_SET(OFF);
FRAM_CS_SET(OFF);
FRAM_WP_SET(OFF);
// SS pin!
BAT_LOW_LED_DIR(OUT);
SPI_ENABLE;
byte rx_data;
rx_data = FRAM_read_sr();
FRAM_write_enable();
rx_data = FRAM_read_sr();
while (TRUE) {};
/*
FRAM_write_enable();
// ~~~~~~~~~~~~~~~~ BEGIN TEST CODE ~~~~~~~~~~~~~~~~~~~~~~
byte tx_byte, rx_byte = OFF;;
while (TRUE) {
tx_byte = 0x03;
rx_byte = FRAM_read_sr();
//writeNumToScreen(rx_byte);
FRAM_write_enable();
FRAM_write_byte(FRAM_FRAME_BUFFER_START_MSB, FRAM_FRAME_BUFFER_START_LSB, tx_byte);
rx_byte = FRAM_read_byte(FRAM_FRAME_BUFFER_START_MSB, FRAM_FRAME_BUFFER_START_LSB);
BAT_LOW_LED(rx_byte);
//writeNumToScreen(rx_byte);
//_delay_ms(GAME_LOOP_DELAY);
//_delay_ms(GAME_LOOP_DELAY);
//_delay_ms(GAME_LOOP_DELAY);
//_delay_ms(GAME_LOOP_DELAY);
//_delay_ms(GAME_LOOP_DELAY);
tx_byte = 0x04;
FRAM_write_enable();
FRAM_write_byte(FRAM_FRAME_BUFFER_START_MSB, FRAM_FRAME_BUFFER_START_LSB, tx_byte);
rx_byte = FRAM_read_byte(FRAM_FRAME_BUFFER_START_MSB, FRAM_FRAME_BUFFER_START_LSB);
BAT_LOW_LED(rx_byte);
//writeNumToScreen(rx_byte);
}
// ~~~~~~~~~~~~~~~~ END TEST CODE ~~~~~~~~~~~~~~~~~~~~~~ */
/*
setup();
clearScreen();
clearFrameBuffer();
// Initialise variables.
byte local_button_state[NUM_BUTTONS];
byte collision_state = FALSE;
byte row = INITIAL_CURSOR_ROW, col = INITIAL_CURSOR_COL;
byte pwm_value = OFF;
byte screen_inverted = FALSE;
PWM_VALUE(pwm_value);
// Create a state machine based on the button values.
while (TRUE) {
// Slow down the game for the user.
_delay_ms(GAME_LOOP_DELAY);
// Create a local button state variable to avoid bstate changing during one cycle.
copyButtonState(button_state, local_button_state);
// ADMINISTRATIVE BUTTONS //
// RESET THE GAME
if ( local_button_state[BSTATE_A] ) {
clearFrameBuffer();
clearScreen();
collision_state = FALSE;
row = INITIAL_CURSOR_ROW;
col = INITIAL_CURSOR_COL;
game_state = GAME_STATE_IDLE;
}
// INVERT THE LCD DISPLAY.
if ( local_button_state[BSTATE_B] ) {
if (screen_inverted) {
// Uninvert the screen.
LCD_command_tx(LCD_CMD_NON_INVERTED); // Display inverse off.
screen_inverted = FALSE;
} else {
LCD_command_tx(LCD_CMD_INVERTED); // Display inverse on.
screen_inverted = TRUE;
}
_delay_ms(GAME_LOOP_DELAY);
_delay_ms(GAME_LOOP_DELAY);
}
// CHANGE THE BRIGHTNESS OF THE SCREEN
if ( local_button_state[BSTATE_ACTION] ) {
if (pwm_value == OFF) {
pwm_value = ON;
} else if (pwm_value < PWM_STEP) {
pwm_value = OFF;
} else {
pwm_value -= PWM_STEP;
}
PWM_VALUE(pwm_value);
}
// GAME PLAY BUTTONS //
// IF COLLISION, GAME HAS BEEN LOST. WAIT UNTIL USER RESET.
if (collision_state) {
// If a collision occured draw a pattern over the screen.
drawScreenPattern();
} else {
// MOVE CURSOR UP.
if ( game_state == GAME_STATE_UP ) {
if (row==0) {
row = LCD_MAX_ROWS;
} else {
row--;
}
}
// MOVE CURSOR DOWN
if ( game_state == GAME_STATE_DOWN ) {
if (row == LCD_MAX_ROWS) {
row = 0;
} else {
row++;
}
}
// MOVE CURSOR LEFT
if ( game_state == GAME_STATE_LEFT ) {
if (col==0) {
col = LCD_MAX_COLS;
} else {
col--;
}
}
// MOVE CURSOR RIGHT
if ( game_state == GAME_STATE_RIGHT ) {
if (col == LCD_MAX_COLS) {
col = 0;
} else {
col++;
}
}
// If the cursor has been moved, check for a collision with the previous path.
if ( game_state != GAME_STATE_IDLE ) {
collision_state = checkForCollision(row,col);
}
addPixelToFrameBuffer(row, col, ON);
drawFrameBuffer();
}
}
*/
}
