/*
* \brief Nut/OS Initialization.
*
* Initializes the memory management and the thread system and starts
* an idle thread, which in turn initializes the timer management.
* Finally the application's main() function is called.
*
* Depending on the compiler, different methods are used to execute this
* function before main() is called.
*
* For ICCAVR the default crtatmega.o startup file is replaced by
* crtnut.o, which calls NutInit instead of main(). This is done
* by adding the following compiler options in the project:
* \code -ucrtnut.o nutinit.o \endcode
*
* For AVRGCC this function is located in section .init8, which is
* called immediately before jumping to main(). NutInit is defined
* as:
* \code
* void NutInit(void) __attribute__ ((naked)) __attribute__ ((section (".init8")));
* \endcode
*/
void NutInit(void)
{
/*
* We can't use local variables in naked functions.
*/
#ifdef NUTDEBUG
outp(7, UBRR);
outp(BV(RXEN) | BV(TXEN), UCR);
#endif
#ifndef __GNUC__
// FIXME: move this line to an appropriate initialization section of ICCAVR (os)
outp(BV(SRE) | BV(SRW), MCUCR);
#endif
/* First check, whether external RAM is available
*/
*(NUTRAMEND - 1) = 0x55;
*NUTRAMEND = 0xAA;
if (*(NUTRAMEND - 1) == 0x55 && *NUTRAMEND == 0xAA) {
/* If we have external RAM, initialize stack pointer to
* end of external RAM to avoid overwriting .data and .bss section
*/
SP = (u_short) NUTRAMEND;
/* Then add the remaining RAM to heap
*/
if ((u_short) NUTRAMEND - (u_short) (&__heap_start) > 384)
NutHeapAdd(&__heap_start, (u_short) NUTRAMEND - 256 - (u_short) (&__heap_start));
} else {
/* No external RAM, so disable external memory interface to use the port pins
for normal operation
*/
MCUCR = 0x00;
/* Add the remaining internal RAM to heap
*/
if ((u_short) RAMEND - (u_short) (&__heap_start) > 384)
NutHeapAdd(&__heap_start, (u_short) RAMEND - 256 - (u_short) (&__heap_start));
};
/*
* Read eeprom configuration.
*/
if (NutLoadConfig()) {
strcpy(confos.hostname, "ethernut");
NutSaveConfig();
}
/* Create idle thread
*/
NutThreadCreate("idle", NutIdle, 0, 384);
}
/*!
* \brief Apply new configuration.
*
* \param dist Pointer to the discovery datagram. It is assumed, that
* the validity of the datagram contents had been checked
* by the caller.
*/
int NutDiscoveryAppConf(DISCOVERY_TELE * dist)
{
memcpy(confos.hostname, dist->dist_hostname, sizeof(confos.hostname));
NutSaveConfig();
memcpy(confnet.cdn_mac, dist->dist_mac, sizeof(confnet.cdn_mac));
confnet.cdn_ip_addr = dist->dist_ip_addr;
confnet.cdn_ip_mask = dist->dist_ip_mask;
confnet.cdn_gateway = dist->dist_gateway;
confnet.cdn_cip_addr = dist->dist_cip_addr;
return NutNetSaveConfig();
}
