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();
}
/*! \brief Decreases the output volume of the amplifier by one step.
*
* Stops at the lowest possible volume.
*/
void tpa6130_dac_decrease_volume(void)
{
int8_t volume = tpa6130_get_volume()& (~(MUTE_L | MUTE_R));;
if( volume > TPA6130_VOL_MIN )
--volume;
tpa6130_set_volume( volume );
}
/*! \brief Increases the output volume of the amplifier by one step.
* Stops at the maximum volume and thus does not wrap to the
* lowest volume.
*/
void tpa6130_dac_increase_volume(void)
{
int8_t volume = tpa6130_get_volume()& (~(MUTE_L | MUTE_R));
if( volume < TPA6130_VOL_MIN )
volume = TPA6130_VOL_MIN;
tpa6130_set_volume(volume+1);
}
static bool state_machine_idle(enum state_function *state)
{
uint32_t frame_rate_ms;
S8 volume;
const S8 volume_inc = (TPA6130_VOL_MAX - TPA6130_VOL_MIN) / 20;
switch (*state)
{
case STATE_FCT_IDLE:
if (new_state_fct)
{
gui_set_selection(GUI_NO_SEL);
gui_text_print(GUI_COMMENT_ID, TEXT_IDLE);
}
else
{
if (controller_wheel_right(1) || controller_wheel_left(1))
switch_state(STATE_SOURCE1);
return false;
}
break;
// Frame rate
case STATE_FCT_FUNCTION1:
frame_rate_ms = gui_get_update_fs();
if (controller_wheel_left(1) && frame_rate_ms < 1000)
{
if (!frame_rate_ms)
frame_rate_ms = 40;
else
frame_rate_ms = 1000 / ((1000 / frame_rate_ms) - 1);
new_state_fct = true;
}
else if (controller_wheel_right(1))
{
if (frame_rate_ms <= 40)
frame_rate_ms = 0;
else
frame_rate_ms = 1000 / ((1000 / frame_rate_ms) + 1);
new_state_fct = true;
}
if (new_state_fct)
{
gui_change_update_fs(frame_rate_ms);
if (frame_rate_ms)
{
gui_text_printf(GUI_COMMENT_ID, TEXT_FUNC1 "\n%i Frame(s)/s\n\n\n\n" TEXT_WHEEL, (1000 / frame_rate_ms));
}
else
gui_text_print(GUI_COMMENT_ID, TEXT_FUNC1 "\nMAX Frame(s)/s\n\n\n\n" TEXT_WHEEL);
}
break;
// Volume
case STATE_FCT_FUNCTION2:
volume = tpa6130_get_volume();
if (volume < TPA6130_VOL_MIN)
volume = TPA6130_VOL_MIN;
if (controller_wheel_right(1))
{
if (volume < TPA6130_VOL_MAX - volume_inc)
volume += volume_inc;
else
volume = TPA6130_VOL_MAX;
new_state_fct = true;
}
else if (controller_wheel_left(1))
{
if (volume > TPA6130_VOL_MIN + volume_inc)
volume -= volume_inc;
else
volume = TPA6130_VOL_MIN;
new_state_fct = true;
}
if (new_state_fct)
{
tpa6130_set_volume(volume);
gui_text_printf(GUI_COMMENT_ID, TEXT_FUNC2 "\nVolume %i%%\n\n\n\n" TEXT_WHEEL, ((int) volume * 100) / (TPA6130_VOL_MAX - TPA6130_VOL_MIN));
}
break;
/*
extern U8 tpa6130_get_volume(void);
extern void tpa6130_set_volume(U8 volume);
*/
case STATE_FCT_FUNCTION3:
if (new_state_fct)
gui_text_print(GUI_COMMENT_ID, TEXT_FUNC_NOT_IMPLEMENTED);
else if (controller_wheel_right(1) || controller_wheel_left(1)) {
switch_state(STATE_SOURCE1);
return false;
}
break;
case STATE_FCT_ZOOM:
break;
}
return true;
}
/*! \brief Set the volume of the DAC.
*/
void tpa6130_dac_set_volume(uint8_t volume)
{
tpa6130_set_volume(volume);
}
/*! 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));
}
}