/**
* \brief Test ABDAC initialization APIs.
*
* \param test Current test case.
*/
static void run_abdac_init_test(const struct test_case *test)
{
status_code_t status;
/* Config the ABDAC. */
abdac_get_config_defaults(&g_abdac_cfg);
status = abdac_init(&g_abdac_inst, ABDACB, &g_abdac_cfg);
abdac_enable(&g_abdac_inst);
abdac_clear_interrupt_flag(&g_abdac_inst, ABDAC_INTERRUPT_TXRDY);
abdac_clear_interrupt_flag(&g_abdac_inst, ABDAC_INTERRUPT_TXUR);
test_assert_true(test, status == STATUS_OK,
"Initialization fails!");
}
/**
* \brief Application entry point for ABDAC example.
*
* \return Unused (ANSI-C compatibility).
*/
int main(void)
{
uint8_t key;
uint32_t i, count;
status_code_t status;
/* Initialize the SAM system. */
sysclk_init();
board_init();
/* Initialize the UART console. */
configure_console();
/* Output example information */
printf("-- ABDAC Example --\r\n");
printf("-- %s\r\n", BOARD_NAME);
printf("-- Compiled: %s %s --\r\n", __DATE__, __TIME__);
/* Config the push button. */
config_buttons();
/* Config the ABDAC. */
abdac_get_config_defaults(&g_abdac_cfg);
g_abdac_cfg.sample_rate_hz = ABDAC_SAMPLE_RATE_11025;
g_abdac_cfg.data_word_format = ABDAC_DATE_16BIT;
g_abdac_cfg.mono = false;
g_abdac_cfg.cmoc = false;
status = abdac_init(&g_abdac_inst, ABDACB, &g_abdac_cfg);
if (status != STATUS_OK) {
printf("-- Initialization fails! --\r\n");
while (1) {
}
}
abdac_enable(&g_abdac_inst);
abdac_clear_interrupt_flag(&g_abdac_inst, ABDAC_INTERRUPT_TXRDY);
abdac_clear_interrupt_flag(&g_abdac_inst, ABDAC_INTERRUPT_TXUR);
/* Config PDCA module */
pdca_enable(PDCA);
pdca_channel_set_config(PDCA_ABDAC_CHANNEL0, &pdca_abdac_config0);
pdca_channel_enable(PDCA_ABDAC_CHANNEL0);
pdca_channel_set_config(PDCA_ABDAC_CHANNEL1, &pdca_abdac_config1);
pdca_channel_enable(PDCA_ABDAC_CHANNEL1);
/* Display menu. */
display_menu();
while (1) {
scanf("%c", (char *)&key);
switch (key) {
case 'h':
display_menu();
break;
case 's':
printf("--Looped output audio, use push button to exit--\r\n");
abdac_set_volume0(&g_abdac_inst, false, 0x7FFF);
abdac_set_volume1(&g_abdac_inst, false, 0x7FFF);
i = 0;
/* output sample from the sound_table array */
while(!exit_flag) {
count = 0;
// Store sample from the sound_table array
while(count < (SOUND_SAMPLES)){
samples_left[count] = ((uint8_t)sound_table[i]) << 8;
samples_right[count] = ((uint8_t)sound_table[i]) << 8;
i++;
count++;
if (i >= sizeof(sound_table)) i = 0;
}
pdca_channel_write_reload(PDCA_ABDAC_CHANNEL0,
(void *)samples_left, SOUND_SAMPLES);
pdca_channel_write_reload(PDCA_ABDAC_CHANNEL1,
(void *)samples_right, SOUND_SAMPLES);
/**
* 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(!(pdca_get_channel_status(PDCA_ABDAC_CHANNEL1)
== PDCA_CH_COUNTER_RELOAD_IS_ZERO));
}
exit_flag = false;
printf("--Exit the audio output--\r\n\r\n");
/* Mute the volume */
abdac_set_volume0(&g_abdac_inst, true, 0x7FFF);
abdac_set_volume1(&g_abdac_inst, true, 0x7FFF);
break;
default:
break;
}
}
}
/*! \brief Sets the DACs up with new settings.
*
* \note The DACs must have been started beforehand.
*/
void tpa6130_dac_setup(uint32_t sample_rate_hz,
uint8_t num_channels,
uint8_t bits_per_sample,
bool swap_channels,
void (*callback)(uint32_t arg),
uint32_t callback_opt,
uint32_t pba_hz)
{
// save input parameters to local driver data
tpa6130_output_param.num_channels = num_channels;
tpa6130_output_param.callback = callback;
tpa6130_output_param.callback_opt = callback_opt;
/* Probe for amplifier and initialize it */
tpa6130_init();
#if defined(TPA6130_DAC_CLOCK_SET_CALLBACK)
TPA6130_DAC_CLOCK_SET_CALLBACK(sample_rate_hz);
#else
/* ABDAC configuration
* The ABDAC needs the input frequency of its generic clock (bus_hz)
* Here we use the configuration value from the conf_tpa6130.h file
* (TPA6130_ABDAC_GCLK_INPUT_HZ).
* The sample rate specifies the desired sample rate for the ABDAC.
* The generic clock input must be greater than 256*sample_rate_hz
* or the setup of the ABDAC will fail silently here.
* TODO we could add asserts here to detect wrong settings during
* compile time.
*/
if(!abdac_set_dac_sample_rate(sample_rate_hz)) {
// if it is not possible to set correctly the sample rate
// Use default set function
abdac_set_dac_hz(TPA6130_ABDAC, TPA6130_ABDAC_GCLK_INPUT_HZ,sample_rate_hz);
}
#endif
if(swap_channels)
{
abdac_swap_channels(TPA6130_ABDAC);
}
abdac_enable(TPA6130_ABDAC);
/* PDCA setup */
/*FIXME we use only word as transfer size for now.
* half-word transfer size will only write to channel0
* of the ABDAC, this can be used to implement mono */
pdca_channel_options_t tpa6130_abdac_pdca_options =
{
.addr = NULL,
.size = 0,
.r_addr = 0,
.r_size = 0,
.pid = TPA6130_ABDAC_PDCA_PID,
.transfer_size = PDCA_TRANSFER_SIZE_WORD
};
/* Initialize the PCDA for the ABDAC
* The channel number can be set in the configuration file
* with the define TPA6130_ABDAC_PDCA_CHANNEL.
*/
pdca_init_channel(TPA6130_ABDAC_PDCA_CHANNEL,
&tpa6130_abdac_pdca_options);
/* Enable the PDCA channel. Since we did not provide any data
* yet the channel is in idle mode */
pdca_enable(TPA6130_ABDAC_PDCA_CHANNEL);
}
/*! \brief Outputs a sample buffer to the DACs.
* The input requires a sample buffer that consists of words (32-bit)
* which contain two (16-bit) samples, one for each channel.
*
* \note The DACs must have been started beforehand.
*/
bool tpa6130_dac_output(void *sample_buffer, size_t sample_length)
{
//int global_interrupt_enabled;
/*Wait until the PDCA loads the reload value to its transfer
* counter register(TCRR=0). Then we are ready to set up a new
* transfer */
if(!(pdca_get_transfer_status(TPA6130_ABDAC_PDCA_CHANNEL) &
PDCA_TRANSFER_COUNTER_RELOAD_IS_ZERO))
{
return false;
}
/* Nothing to do if we get no data. */
if(sample_length)
{
/*TODO Do we really need to adjust the buffer for mono*/
/* While reloading the PDC we do not need any active interrupt*/
//if((global_interrupt_enabled = cpu_irq_is_enabled()))
// cpu_irq_disable();
/*FIXME This assumes a stereo 16-bit sample size */
// one sample here consists of 2x16-bit (16-bit stereo)
pdca_reload_channel(TPA6130_ABDAC_PDCA_CHANNEL,
sample_buffer, sample_length);
//if(global_interrupt_enabled)
// cpu_irq_enable();
/*TODO enable transfer complete interrupt
* Is it possible to move this to setup or other places?*/
if(tpa6130_output_param.callback_opt & AUDIO_DAC_OUT_OF_SAMPLE_CB)
pdca_enable_interrupt_transfer_complete(TPA6130_ABDAC_PDCA_CHANNEL);
if (tpa6130_output_param.callback_opt & AUDIO_DAC_RELOAD_CB)
pdca_enable_interrupt_reload_counter_zero(TPA6130_ABDAC_PDCA_CHANNEL);
}
return true;
}
bool tpa6130_dac_is_volume_muted(void)
{
return false;
}
void tpa6130_dac_mute(bool mute)
{
// //1st Version Mute Audio for Play/Pause
/* int volume=tpa6130_get_volume();
if(mute==true) {
//Mute volume
volume= volume|MUTE_L|MUTE_R;
}
else {
//Unmute volume
volume= volume&(~(MUTE_L|MUTE_R));
}
tpa6130_write_data(TPA6130_VOLUME_AND_MUTE,volume);
*/
//2n Version Stop PDCA >> No lost of audio when pause
/* if(mute==true) {
pdca_disable(TPA6130_ABDAC_PDCA_CHANNEL);
}
else {
pdca_enable(TPA6130_ABDAC_PDCA_CHANNEL);
}
*/
// 3rd Version wait until the current buffers are empty and disable the interrupts
int8_t volume = tpa6130_get_volume();
if (mute)
{
uint32_t save_dac_reload_callback_opt;
// Mute the audio stream
volume = volume | MUTE_L | MUTE_R;
tpa6130_write_data(TPA6130_VOLUME_AND_MUTE, volume);
// Disable the reload channel of the interrupt
save_dac_reload_callback_opt = tpa6130_output_param.callback_opt;
tpa6130_output_param.callback_opt = 0;
// Disable the reload interruption and wait until the transfer is complete
pdca_disable_interrupt_reload_counter_zero(TPA6130_ABDAC_PDCA_CHANNEL);
while (!(pdca_get_transfer_status(TPA6130_ABDAC_PDCA_CHANNEL) & PDCA_TRANSFER_COMPLETE));
// Restore the reload callback function
tpa6130_output_param.callback_opt = save_dac_reload_callback_opt;
}
else
{
// Re-enable the interrupts
pdca_enable_interrupt_reload_counter_zero(TPA6130_ABDAC_PDCA_CHANNEL);
// Un-mute the audio stream
volume = volume & (~(MUTE_L | MUTE_R));
tpa6130_write_data(TPA6130_VOLUME_AND_MUTE, volume);
}
}
