int main(int argc, char **argv) {
_init_Teensyduino_internal_();
setup();
for (;;) {
loop();
}
cleanup();
}
//int main(void) __attribute__((noreturn));
int main(void)
{
_init_Teensyduino_internal_();
setup();
for (;;)
loop();
}
//int main(void) __attribute__((noreturn));
int main(void) {
_init_Teensyduino_internal_();
setup();
while (1) {
loop();
}
}
int main(void) {
#if defined(CORE_TEENSY)
_init_Teensyduino_internal_();
#else
init();
#if defined(USBCON)
USBDevice.attach();
#endif
#endif
xmem::begin(true, true);
if(xmem::getTotalBanks() == 0) goto bad;
if(XMEM_STACK_TOP == XRAMEND) goto bad;
noInterrupts();
// Save the original stack pointer, needed to switch banks.
keepstack = SP;
asm volatile ( "ldi 16, %0" ::"i" (XMEM_STACK_TOP >> 8));
asm volatile ( "out %0,16" ::"i" (AVR_STACK_POINTER_HI_ADDR));
asm volatile ( "ldi 16, %0" ::"i" (XMEM_STACK_TOP & 0x0ff));
asm volatile ( "out %0,16" ::"i" (AVR_STACK_POINTER_LO_ADDR));
interrupts();
setup();
xmem::MultitaskBegin();
for(;;) {
loop();
#if !defined(CORE_TEENSY)
if(serialEventRun) serialEventRun();
#endif
}
return 0;
bad:
//
// NO external RAM.
// Use hardware to quickly blink the LED (pin 13) to alert error.
//
DDRB |= _BV(PB7);
// OC1C
TCCR1A = _BV(COM1C0);
TCCR1B = _BV(WGM12) | _BV(CS11);
OCR1A = 0XDEAD;
noInterrupts();
for(;;);
}
int main(void) {
#if defined(CORE_TEENSY)
_init_Teensyduino_internal_();
#else
#if ARDUINO >= 106
initVariant();
#endif
init();
#if defined(USBCON)
USBDevice.attach();
#endif
#endif
#if EXT_RAM
xmem::begin(EXT_RAM_HEAP, EXT_RAM_STACK);
#if EXT_RAM_STACK
if(xmem::getTotalBanks() == 0) goto no;
if(XMEM_STACK_TOP == XRAMEND) goto no;
noInterrupts();
asm volatile ( "ldi 16, %0" ::"i" (XMEM_STACK_TOP >> 8));
asm volatile ( "out %0,16" ::"i" (AVR_STACK_POINTER_HI_ADDR));
asm volatile ( "ldi 16, %0" ::"i" (XMEM_STACK_TOP & 0x0ff));
asm volatile ( "out %0,16" ::"i" (AVR_STACK_POINTER_LO_ADDR));
interrupts();
#endif
no:
#endif
setup();
for(;;) {
loop();
#if !defined(CORE_TEENSY)
if(serialEventRun) serialEventRun();
#endif
}
return 0;
}
void ResetHandler(void)
{
uint32_t *src = &_etext;
uint32_t *dest = &_sdata;
WDOG_UNLOCK = WDOG_UNLOCK_SEQ1;
WDOG_UNLOCK = WDOG_UNLOCK_SEQ2;
WDOG_STCTRLH = WDOG_STCTRLH_ALLOWUPDATE;
startup_early_hook();
// enable clocks to always-used peripherals
SIM_SCGC5 = 0x00043F82; // clocks active to all GPIO
SIM_SCGC6 = SIM_SCGC6_RTC | SIM_SCGC6_FTM0 | SIM_SCGC6_FTM1 | SIM_SCGC6_ADC0 | SIM_SCGC6_FTFL;
// if the RTC oscillator isn't enabled, get it started early
if (!(RTC_CR & RTC_CR_OSCE)) {
RTC_SR = 0;
RTC_CR = RTC_CR_SC16P | RTC_CR_SC4P | RTC_CR_OSCE;
}
// TODO: do this while the PLL is waiting to lock....
while (dest < &_edata) *dest++ = *src++;
dest = &_sbss;
while (dest < &_ebss) *dest++ = 0;
SCB_VTOR = 0; // use vector table in flash
// start in FEI mode
// enable capacitors for crystal
OSC0_CR = OSC_SC8P | OSC_SC2P;
// enable osc, 8-32 MHz range, low power mode
MCG_C2 = MCG_C2_RANGE0(2) | MCG_C2_EREFS;
// switch to crystal as clock source, FLL input = 16 MHz / 512
MCG_C1 = MCG_C1_CLKS(2) | MCG_C1_FRDIV(4);
// wait for crystal oscillator to begin
while ((MCG_S & MCG_S_OSCINIT0) == 0) ;
// wait for FLL to use oscillator
while ((MCG_S & MCG_S_IREFST) != 0) ;
// wait for MCGOUT to use oscillator
while ((MCG_S & MCG_S_CLKST_MASK) != MCG_S_CLKST(2)) ;
// now we're in FBE mode
// config PLL input for 16 MHz Crystal / 4 = 4 MHz
MCG_C5 = MCG_C5_PRDIV0(3);
// config PLL for 96 MHz output
MCG_C6 = MCG_C6_PLLS | MCG_C6_VDIV0(0);
// wait for PLL to start using xtal as its input
while (!(MCG_S & MCG_S_PLLST)) ;
// wait for PLL to lock
while (!(MCG_S & MCG_S_LOCK0)) ;
// now we're in PBE mode
#if F_CPU == 96000000
// config divisors: 96 MHz core, 48 MHz bus, 24 MHz flash
SIM_CLKDIV1 = SIM_CLKDIV1_OUTDIV1(0) | SIM_CLKDIV1_OUTDIV2(1) | SIM_CLKDIV1_OUTDIV4(3);
#elif F_CPU == 48000000
// config divisors: 48 MHz core, 48 MHz bus, 24 MHz flash
SIM_CLKDIV1 = SIM_CLKDIV1_OUTDIV1(1) | SIM_CLKDIV1_OUTDIV2(1) | SIM_CLKDIV1_OUTDIV4(3);
#elif F_CPU == 24000000
// config divisors: 24 MHz core, 24 MHz bus, 24 MHz flash
SIM_CLKDIV1 = SIM_CLKDIV1_OUTDIV1(3) | SIM_CLKDIV1_OUTDIV2(3) | SIM_CLKDIV1_OUTDIV4(3);
#else
#error "Error, F_CPU must be 96000000, 48000000, or 24000000"
#endif
// switch to PLL as clock source, FLL input = 16 MHz / 512
MCG_C1 = MCG_C1_CLKS(0) | MCG_C1_FRDIV(4);
// wait for PLL clock to be used
while ((MCG_S & MCG_S_CLKST_MASK) != MCG_S_CLKST(3)) ;
// now we're in PEE mode
// configure USB for 48 MHz clock
SIM_CLKDIV2 = SIM_CLKDIV2_USBDIV(1); // USB = 96 MHz PLL / 2
// USB uses PLL clock, trace is CPU clock, CLKOUT=OSCERCLK0
SIM_SOPT2 = SIM_SOPT2_USBSRC | SIM_SOPT2_PLLFLLSEL | SIM_SOPT2_TRACECLKSEL | SIM_SOPT2_CLKOUTSEL(6);
// initialize the SysTick counter
SYST_RVR = (F_CPU / 1000) - 1;
SYST_CSR = SYST_CSR_CLKSOURCE | SYST_CSR_TICKINT | SYST_CSR_ENABLE;
//init_pins();
__enable_irq();
_init_Teensyduino_internal_();
if (RTC_SR & RTC_SR_TIF) rtc_set(TIME_T);
__libc_init_array();
/*
for (ptr = &__init_array_start; ptr < &__init_array_end; ptr++) {
(*ptr)();
}
*/
startup_late_hook();
main();
while (1) ;
}
// Main
int main(void) {
// Init
#if defined(ENERGIA) // LaunchPad, FraunchPad and StellarPad specific
#if defined(__LM4F120H5QR__) // StellarPad specific
ROM_FPULazyStackingEnable();
timerInit();
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOC);
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD);
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOE);
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);
#else // LaunchPad and FraunchPad specific
init();
#endif
#elif defined(CORE_TEENSY) // Teensy specific
_init_Teensyduino_internal_();
#elif defined(WIRING) // Wiring specific
boardInit();
#else // General case
init();
delay(1);
#if defined(ARDUINO) && (ARDUINO >= 100) // Arduino 1.0 + 1.5 specific
#if defined(USBCON) // Arduino 1.0 + 1.5 specific
USBDevice.attach();
#endif
#endif
#endif
// Setup
setup();
// Loop
for (;;) {
loop();
#if defined(ENERGIA)
#elif defined(MPIDE)
#elif defined(CORE_TEENSY)
#ifdef USB_SERIAL
usb_serial_class Serial;
#endif
#elif defined(WIRING)
#elif defined(ARDUINO) && (ARDUINO >= 100) // Arduino 1.0 + 1.5 specific
if (serialEventRun) serialEventRun();
#endif
}
return 0;
}