int main(void)
{
uint8_t TWIS_ResponseType;
init_modi();
init_io_ports();
init_timer();
set_outputs();
/*
** Start TWI Slave with address 15 and bitrate of 100000 Hz
*/
TWIS_Init();
/*
mainloop - Kommunikation mit dem master
*/
while (1)
{
if (TWIS_ResponseRequired(&TWIS_ResponseType))
{
switch (TWIS_ResponseType)
{
/*
** Slave is requested to read bytes from the master.
*/
case TW_SR_SLA_ACK:
{
outputdata.ports = TWIS_ReadAck();
outputdata.ports += TWIS_ReadAck() << 8;
uint8_t i;
for (i = 0; i < PWM_CHAN - 1; i++)
outputdata.pwmval[i] = TWIS_ReadAck();
outputdata.pwmval[i] = TWIS_ReadNack();
TWIS_Stop(); // I2C stop
set_outputs();
}
break;
/*
** Slave is requested to send bytes from the master.
*/
case TW_ST_SLA_ACK:
TWIS_Write(outputdata.ports);
TWIS_Write(outputdata.ports >> 8);
for (int read_p = 0; read_p < PWM_CHAN; read_p++)
TWIS_Write(outputdata.pwmval[read_p]);
TWIS_Stop();
break;
default:
TWIS_Stop();
break;
}
}
wdt_reset();
}
}
/* -------------------------------------------------------------------------
* Main Funktion
*
* Initialisiert den Timer Interrupt und
* behandelt die Laufschrift
* -------------------------------------------------------------------------*/
int main(void)
{
cli(); // Interrupts sperren (damit keiner dazwischenfunkt)
_delay_ms(50); // Wait for POR
/*---------------------------------------------------
* Ports konfigurieren (Ein-/Ausgänge)
*---------------------------------------------------*/
DDRC = 0x0f; // Portc = Output ADC6 und ADC7 gehen nur fur Analog Messung!
DDRB = 0xff; // Portb = Output
DDRD = 0xff; // Portd = Output
/*---------------------------------------------------------------------------
* 8-Bit Timer TCCR0 für das Multiplexing der LEDs initialisieren
* Es wird ca. alle 2 Millisekunden ein Overflow0 Interrupt ausgelöst
* Berechnung: T = Vorteiler * Wertebereich Zähler / Taktfreuenz
* = 64 * 256 / ( 8000000 Hz ) = 2,048 ms
*---------------------------------------------------------------------------*/
TCCR0 |= (1<<CS01) | (1<<CS00); // 8-bit Timer mit 1/64 Vorteiler
TIFR |= (1<<TOV0); // Clear overflow flag (TOV0)
TIMSK |= (1<<TOIE0); // timer0 will create overflow interrupt
TWIS_Init (TWI_DISPLAY_ID, 100000);
/*---------------------------------------------------
* Hauptschleife (Laufschrift erzeugen)
*---------------------------------------------------*/
char buffer[3];
uint8_t TWIS_ResponseType;
showText("--");
/* initialize display, cursor off */
lcd_init(LCD_DISP_ON);
/* clear display and home cursor */
lcd_clrscr();
lcd_puts("Servu\ns");
sei(); // Interrupts erlauben
uint8_t mainScore=0;
uint8_t slaveScore=0;
uint8_t mainToServe=0;
uint8_t mainGames=0;
uint8_t slaveGames=0;
while(1) // Endlosschleife
{
if (TWIS_ResonseRequired (&TWIS_ResponseType)) {
if (TWIS_ResponseType == TWIS_ReadBytes) {
mainScore = TWIS_ReadAck();
slaveScore = TWIS_ReadAck();
mainGames = TWIS_ReadAck();
slaveGames = TWIS_ReadAck();
mainToServe = TWIS_ReadNack(); // The last Byte
TWIS_Stop();
// LCD Display
lcd_clrscr();
numberToString(mainScore, buffer);
lcd_puts(buffer);
if (buffer[1] == 0) {
lcd_puts(" "); // Formatierung bei nur 1 stellig
}
lcd_puts(mainToServe?"*":" ");
numberToString(mainGames, buffer);
lcd_puts(buffer); // Saetze main
lcd_puts("<\n>");
numberToString(slaveScore, buffer);
lcd_puts(buffer);
if (buffer[1] == 0) {
lcd_puts(" "); // Formatierung bei nur 1 stellig
}
lcd_puts(mainToServe?" ":"*");
numberToString(slaveGames, buffer);
lcd_puts(buffer); // Saetze slave
// Led Display
clearScreen();
numberToString(slaveScore, buffer);
showText(buffer);
led_showGames(slaveGames);
if (!mainToServe) {
led_showHaveToServ();
}
}
}
}
return 0;
}