/*-----------------------------------------------------------------------------
* send bus telegram
*/
uint8_t BusSend(TBusTelegram *pMsg) {
uint8_t ch;
uint8_t checkSum = CHECKSUM_START;
ch = STX;
SioWrite(ch);
checkSum += ch;
ch = pMsg->senderAddr;
TransmitCharProt(ch);
checkSum += ch;
ch = pMsg->type;
TransmitCharProt(ch);
checkSum += ch;
switch(pMsg->type) {
case eBusDevStartup:
break;
case eBusDevRespUpdEnter:
ch = pMsg->msg.devBus.receiverAddr;
TransmitCharProt(ch);
checkSum += ch;
break;
case eBusDevRespUpdData:
ch = pMsg->msg.devBus.receiverAddr;
TransmitCharProt(ch);
checkSum += ch;
/* first the low byte */
ch = pMsg->msg.devBus.x.devResp.updData.wordAddr & 0xff;
TransmitCharProt(ch);
checkSum += ch;
/* the high byte */
ch = pMsg->msg.devBus.x.devResp.updData.wordAddr >> 8;
TransmitCharProt(ch);
checkSum += ch;
break;
case eBusDevRespUpdTerm:
ch = pMsg->msg.devBus.receiverAddr;
TransmitCharProt(ch);
checkSum += ch;
ch = pMsg->msg.devBus.x.devResp.updTerm.success;
TransmitCharProt(ch);
checkSum += ch;
break;
default:
break;
}
TransmitCharProt(checkSum);
SioReadFlush();
return BUS_SEND_OK;
}
/*-----------------------------------------------------------------------------
* program start
*/
int main(void) {
UINT8 ret;
UINT16 flashWordAddr;
UINT16 sum;
cli();
MCUSR = 0;
wdt_disable();
/* get oscillator correction value from EEPROM */
EEAR = OSCCAL_CORR;
/* Start eeprom read by writing EERE */
EECR |= (1 << EERE);
/* read data */
OSCCAL += EEDR;
/* get modul adress from EEPROM */
EEAR = MODUL_ADDRESS;
/* Start eeprom read by writing EERE */
EECR |= (1 << EERE);
/* read data */
sMyAddr = EEDR;
/* configure pins to input with pull up */
PORTB = 0b11111111;
DDRB = 0b00000000;
PORTC = 0b11111111;
DDRC = 0b00000000;
PORTD = 0b11111111;
DDRD = 0b00100010;
/* configure Timer 0 */
/* prescaler clk/64 -> Interrupt period 256/1000000 * 64 = 16.384 ms */
TCCR0B = 3 << CS00;
TIMSK0 = 1 << TOIE0;
SioInit();
spRxBusMsg = BusMsgBufGet();
/* Enable change of Interrupt Vectors */
MCUCR = (1 << IVCE);
/* Move interrupts to Boot Flash section */
MCUCR = (1 << IVSEL);
/* Prüfsumme der Applikation berechnen */
sum = 0;
for (flashWordAddr = 0; flashWordAddr < (MAX_FIRMWARE_SIZE / 2); flashWordAddr += CHECKSUM_BLOCK_SIZE) {
sum += FlashSum(flashWordAddr, (UINT8)CHECKSUM_BLOCK_SIZE);
}
if (sum != FLASH_CHECKSUM) {
/* Fehler */
sFwuState = WAIT_FOR_UPD_ENTER;
}
sei();
/* Startup-Msg senden */
sTxBusMsg.type = eBusDevStartup;
sTxBusMsg.senderAddr = MY_ADDR;
BusSend(&sTxBusMsg);
SioReadFlush();
/* Hauptschleife */
while (1) {
ret = BusCheck();
ProcessBus(ret);
/* Mit timeout auf Request zum Firmwareupdate warten */
if (sFwuState == WAIT_FOR_UPD_ENTER_TIMEOUT) {
if (gTimeS8 >= 4) {
/* Application starten */
break;
}
}
}
cli();
/* Enable change of Interrupt Vectors */
MCUCR = (1 << IVCE);
/* Move interrupts to application section */
MCUCR = (0 << IVSEL);
/* jump to application */
ApplicationEntry();
/* never reach this */
return 0;
}
/*-----------------------------------------------------------------------------
* Programstart
*/
int main(void) {
UINT8 ret;
UINT16 flashWordAddr;
UINT16 sum;
/* get oscillator correction value from EEPROM */
EEAR = OSCCAL_CORR;
/* Start eeprom read by writing EERE */
EECR |= (1 << EERE);
/* read data */
OSCCAL += EEDR;
/* get modul adress from EEPROM */
EEAR = MODUL_ADDRESS;
/* Start eeprom read by writing EERE */
EECR |= (1 << EERE);
/* read data */
sMyAddr = EEDR;
/* Portpins für Schaltereingänge mit Pullup konfigurieren */
/* nicht benutzte Pin aus Ausgang Low*/
PORTC = 0x03;
DDRC = 0x3C;
PORTB = 0x38;
DDRB = 0xC7;
PORTD = 0x01;
DDRD = 0xFE;
/* configure Timer 0 */
/* prescaler clk/64 -> Interrupt period 256/1000000 * 64 = 16.384 ms */
TCCR0 = 3 << CS00;
TIMSK = 1 << TOIE0;
SioInit();
spRxBusMsg = BusMsgBufGet();
/* Umschaltung der Interruptvektor-Tabelle */
GICR = (1 << IVCE);
/* In Bootbereich verschieben */
GICR = (1 << IVSEL);
/* Prüfsumme der Applikation berechnen */
sum = 0;
for (flashWordAddr = 0; flashWordAddr < (MAX_FIRMWARE_SIZE / 2); flashWordAddr += CHECKSUM_BLOCK_SIZE) {
sum += FlashSum(flashWordAddr, (UINT8)CHECKSUM_BLOCK_SIZE);
}
if (sum != FLASH_CHECKSUM) {
/* Fehler */
sFwuState = WAIT_FOR_UPD_ENTER;
}
sei();
/* Startup-Msg senden */
sTxBusMsg.type = eBusDevStartup;
sTxBusMsg.senderAddr = MY_ADDR;
BusSend(&sTxBusMsg);
SioReadFlush();
/* Hauptschleife */
while (1) {
ret = BusCheck();
ProcessBus(ret);
/* Mit timeout auf Request zum Firmwareupdate warten */
if (sFwuState == WAIT_FOR_UPD_ENTER_TIMEOUT) {
if (gTimeS8 >= 4) {
/* Application starten */
break;
}
}
}
cli();
/* Umschaltung der Interruptvektor-Tabelle */
GICR = (1 << IVCE);
/* In Applikationsbereich verschieben */
GICR = (0 << IVSEL);
/* zur Applikation springen */
ApplicationEntry();
/* hier kommen wir nicht her!!*/
return 0;
}
