void dsp_process_init(int cpu_hz, int hsb_hz, int pba_hz, int pbb_hz)
{
// Initialize TPA6130
tpa6130_init();
// Initialize DAC that send audio to TPA6130
tpa6130_dac_start(DAC_SAMPLING_RATE, DAC_NUM_CHANNELS,
DAC_BITS_PER_SAMPLE, DAC_SWAP_CHANNELS,
audio_callback, AUDIO_DAC_RELOAD_CB,
FOSC0);
tpa6130_set_volume(0x20);
tpa6130_get_volume();
signal_source_init(&signal1_generator, 433, 20000);
signal_source_init(&signal2_generator, 2000, 10000);
current_stereo_out_buf = stereo_out_buf1;
signal_in_buf = signal_pre_filter_buf + FIR_NUM_COEF;
filter_restore_default();
/* Fill the initial buffer for the hamming window with ones. This buffer
* will then be multiplied by the hamming window.
*/
dsp16_gen_step(fft_window, BUFFER_LENGTH, DSP16_Q(1.), DSP16_Q(1.), 0);
dsp16_win_hamm(fft_window, fft_window, BUFFER_LENGTH);
/* Run the interrupt handler manually once to start the ABDAC */
dac_reload_callback();
}
/*! main function */
int main(void)
{
init_sys_clocks();
// Initialize RS232 debug text output.
init_dbg_rs232(FOSC0);
print_dbg(MSG_WELCOME);
// Enable LED0 and LED1
gpio_enable_gpio_pin(LED0_GPIO);
gpio_enable_gpio_pin(LED1_GPIO);
// Configure TWI as master
twi_init();
// Initialize TPA6130
tpa6130_init();
// Initialize DAC that send audio to TPA6130
tpa6130_dac_start(DEFAULT_DAC_SAMPLE_RATE_HZ,
DEFAULT_DAC_NUM_CHANNELS,
DEFAULT_DAC_BITS_PER_SAMPLE,
DEFAULT_DAC_SWAP_CHANNELS,
master_callback,
AUDIO_DAC_OUT_OF_SAMPLE_CB
| AUDIO_DAC_RELOAD_CB,
FOSC0);
tpa6130_set_volume(0x2F);
tpa6130_get_volume();
int count = 0;
int i=0;
while(true)
{
count = 0;
// Store sample from the sound_table array
while(count < (SOUND_SAMPLES)){
samples[count++] = ((uint8_t)sound_table[i]+0x80) << 8;
samples[count++] = ((uint8_t)sound_table[i]+0x80) << 8;
i++;
if (i >= sizeof(sound_table)) i = 0;
}
gpio_set_gpio_pin(LED0_GPIO);
gpio_clr_gpio_pin(LED1_GPIO);
// Play buffer
tpa6130_dac_output((void *) samples,SOUND_SAMPLES/2);
gpio_clr_gpio_pin(LED0_GPIO);
gpio_set_gpio_pin(LED1_GPIO);
/* Wait until the reload register is empty.
* This means that one transmission is still ongoing
* but we are already able to set up the next transmission
*/
while(!tpa6130_dac_output(NULL, 0));
}
}
