bool usb_stream_new_sample_rate(uint32_t sample_rate)
{
audio_mixer_dacs_flush_direct(false);
usb_stream_init(sample_rate,
2,
16,
false);
return true;
}
//!
//! @brief This function initializes the hardware/software resources
//! required for device Audio task.
//!
void device_audio_task_init(void)
{
sof_cnt =0;
#if (BOARD!=EVK1105)
dat_sample_index =0;
#endif
#ifndef FREERTOS_USED
#if USB_HOST_FEATURE == true
// If both device and host features are enabled, check if device mode is engaged
// (accessing the USB registers of a non-engaged mode, even with load operations,
// may corrupt USB FIFO data).
if (Is_usb_device())
#endif // USB_HOST_FEATURE == true
Usb_enable_sof_interrupt();
#endif // FREERTOS_USED
player_init();
if (!device_audio_task_data)
device_audio_task_data = calloc(1, sizeof(*device_audio_task_data));
#if (BOARD==EVK1105) && (DEFAULT_DACS==AUDIO_MIXER_DAC_AIC23B)
// Allocate memory for the microphone audio samples.
// Receiving stereo samples from the ADC.
// For a 48KHz, needs 196 bytes. Let's use a little more.
microphone[0].buffer= (uint16_t*)malloc(200);
microphone[0].size = 0;
microphone[1].buffer= (uint16_t*)malloc(200);
microphone[1].size = 0;
b_microphone_started=false;
b_microphone_pause=false;
#endif
usb_stream_init(
SPEAKER_FREQUENCY
, 2
, 16
, false
);
#ifdef FREERTOS_USED
xTaskCreate(device_audio_task,
configTSK_USB_DAUDIO_NAME,
configTSK_USB_DAUDIO_STACK_SIZE,
NULL,
configTSK_USB_DAUDIO_PRIORITY,
NULL);
#endif // FREERTOS_USED
}
//!
//! @brief This function initializes the hardware/software resources
//! required for device Audio task.
//!
void device_audio_task_init(void)
{
sof_cnt =0;
player_init();
if (!device_audio_task_data)
device_audio_task_data = calloc(1, sizeof(*device_audio_task_data));
usb_stream_init(
DEFAULT_DAC_SAMPLE_RATE_HZ
, 2
, 16
, false
);
}
void audio_speaker_set_sample_freq(void)
{
uint32_t sample_freq=0;
Usb_ack_setup_received_free();
while(!Is_usb_control_out_received())
{
TASKS_SCHEDULE();
}
Usb_reset_endpoint_fifo_access(EP_CONTROL);
LSB0(sample_freq)=Usb_read_endpoint_data(EP_CONTROL, 8);
LSB1(sample_freq)=Usb_read_endpoint_data(EP_CONTROL, 8);
LSB2(sample_freq)=Usb_read_endpoint_data(EP_CONTROL, 8);
Usb_ack_control_out_received_free();
Usb_ack_control_in_ready_send(); // send a ZLP
while (!Is_usb_control_in_ready())
{
TASKS_SCHEDULE();
}
#if (defined BOARD) && (BOARD==EVK1105) && (defined DEFAULT_DACS) && (DEFAULT_DACS==AUDIO_MIXER_DAC_AIC23B)
// Disable microphone callback interrupt in order for the flush to not be blocked.
// TODO: audio_mixer_dacs_flush_direct flushes Rx and Tw part of the DAC.
// Should we separate them? Here, we want to flash the output only.
device_audio_disable_microphone();
#endif
audio_mixer_dacs_flush_direct(false);
usb_stream_init(
sample_freq
, 2
, 16
, false
);
#if (defined BOARD) && (BOARD==EVK1105) && (defined DEFAULT_DACS) && (DEFAULT_DACS==AUDIO_MIXER_DAC_AIC23B)
// Enable microphone call back interrupts.
device_audio_enable_microphone();
#endif
}
