//! The main function
int main(int argc, char *argv[])
{
unsigned int cycle_count;
volatile dsp32_t fft32_max;
// Switch to external Oscillator 0.
pm_switch_to_osc0(&AVR32_PM, FOSC0, OSC0_STARTUP);
// Initialize the DSP debug module
dsp_debug_initialization(FOSC0);
// Get the actual cycle count
cycle_count = Get_sys_count();
// Perform a 64-point complex FFT
dsp32_trans_realcomplexfft(vect1, vect2, NLOG);
// Perform the absolute value of a complex vector
dsp32_vect_complex_abs(fft_real, vect1, SIZE);
// Retrieves the maximum of a vector
fft32_max = dsp32_vect_max(fft_real, SIZE);
// Calculate the number of cycles the FFT took
cycle_count = Get_sys_count() - cycle_count;
// Print the number of cycles
dsp32_debug_printf("Cycle count: %d\n", cycle_count);
// Print the complex FFT output signal
dsp32_debug_print_complex_vect(vect1, SIZE);
while(1);
}
// The main function
int main(int argc, char *argv[])
{
unsigned int cycle_count, i;
volatile dsp32_t fft32_max;
char *temp = " +";
char complex_vect_result[SIZE][31];
/**
* \note the call to sysclk_init() will disable all non-vital
* peripheral clocks, except for the peripheral clocks explicitly
* enabled in conf_clock.h.
*/
sysclk_init();
// Initialize the DSP debug USART module when running in external board
#if BOARD != AVR_SIMULATOR_UC3
dsp_debug_initialization(FOSC0);
#endif
// Get the actual cycle count
cycle_count = Get_sys_count();
// Perform a 64-point complex FFT
dsp32_trans_realcomplexfft(vect1, vect2, NLOG);
// Perform the absolute value of a complex vector
dsp32_vect_complex_abs(fft_real, vect1, SIZE);
// Retrieves the maximum of a vector
fft32_max = dsp32_vect_max(fft_real, SIZE);
// Calculate the number of cycles the FFT took
cycle_count = Get_sys_count() - cycle_count;
// Print the output signal
for (i = 0; i < SIZE; i++) {
if (vect1[i].imag >= 0) {
temp = " +";
} else {
temp = " ";
}
dsp32_debug_sprintf(complex_vect_result[i],"%f%s%f", vect1[i].real,
temp,vect1[i].imag);
}
/*
* Place a breakpoint here and check ASCII output in complex_vect_result
* in Memory Window.
* Note: Find the variable address in Watch Window and enter it in
* Memory Window
*/
while (1) {
// Intentionally left blank.
}
}
/**
* \brief Function to find Vector Maximum
* \param size Pointer to store output Vector Size
*/
int maximum(int *size)
{
int cycle_count;
// Conditions
CHECK_CONDITIONS(VECT1_SIZE > 0)
CHECK_CONDITIONS(VECT2_SIZE > 0)
*size = 1;
cycle_count = Get_sys_count();
vect1[0] = dsp32_vect_max(vect2, VECT2_SIZE);
return Get_sys_count() - cycle_count;
}
