/** Configures the board hardware and chip peripherals for the demo's functionality. */
void SetupHardware(void)
{
#if (ARCH == ARCH_AVR8)
/* Disable watchdog if enabled by bootloader/fuses */
MCUSR &= ~(1 << WDRF);
wdt_disable();
/* Disable clock division */
clock_prescale_set(clock_div_1);
#elif (ARCH == ARCH_UC3)
/* Start the master external oscillator which will be used as the main clock reference */
AVR32CLK_StartExternalOscillator(0, EXOSC_MODE_8MHZ_OR_MORE, EXOSC_START_0CLK);
/* Start the PLL for the CPU clock, switch CPU to it */
AVR32CLK_StartPLL(0, CLOCK_SRC_OSC0, 12000000, F_CPU);
AVR32CLK_SetCPUClockSource(CLOCK_SRC_PLL0, F_CPU);
/* Start the PLL for the USB Generic Clock module */
AVR32CLK_StartPLL(1, CLOCK_SRC_OSC0, 12000000, F_USB);
/* Initialize interrupt subsystem */
INTC_Init();
INTC_RegisterGroupHandler(INTC_IRQ_GROUP(AVR32_USBB_IRQ), AVR32_INTC_INT0, USB_GEN_vect);
#endif
/* Hardware Initialization */
LEDs_Init();
USB_Init();
}
//Initialize the clock
void clock_init(void)
{
GlobalInterruptDisable();
INTC_RegisterGroupHandler(INTC_IRQ_GROUP(AVR32_TC_IRQ0), AVR32_INTC_INT0, tc_irq);
GlobalInterruptEnable();
// Initialize the timer/counter.
tc_init_waveform(tc, &WAVEFORM_OPT); // Initialize the timer/counter waveform.
// Set the compare triggers.
// Remember TC counter is 16-bits, so counting second is not possible with fPBA = 12 MHz.
// We configure it to count ms.
// We want: (1/(fPBA/8)) * RC = 0.001 s, hence RC = (fPBA/8) / 1000 = 1500 to get an interrupt every 1 ms.
tc_write_rc(tc, TC_CHANNEL, (F_PBA_SPEED / 8) / 1000); // Set RC value.
//tc_write_ra(tc, TC_CHANNEL, 0); // Set RA value.
//tc_write_rb(tc, TC_CHANNEL, 1900); // Set RB value.
//gpio_enable_module_pin(AVR32_TC_A0_0_1_PIN, AVR32_TC_A0_0_1_FUNCTION);
//gpio_enable_module_pin(AVR32_TC_B0_0_1_PIN, AVR32_TC_B0_0_1_FUNCTION);
tc_configure_interrupts(tc, TC_CHANNEL, &TC_INTERRUPT);
// Start the timer/counter.
tc_start(tc, TC_CHANNEL); // And start the timer/counter.
}
