bool aic23b_adc_input(void *sample_buffer, size_t sample_length)
{
if (!(pdca_get_transfer_status(AIC23B_SSC_RX_PDCA_CHANNEL) &
PDCA_TRANSFER_COUNTER_RELOAD_IS_ZERO))
return false;
if (sample_length)
{
pdca_reload_channel(AIC23B_SSC_RX_PDCA_CHANNEL, sample_buffer, sample_length * 2);
pdca_get_reload_size(AIC23B_SSC_RX_PDCA_CHANNEL);
if (aic23b_output_params.callback_opt & AUDIO_ADC_OUT_OF_SAMPLE_CB)
pdca_enable_interrupt_transfer_complete(AIC23B_SSC_RX_PDCA_CHANNEL);
if (aic23b_output_params.callback_opt & AUDIO_ADC_RELOAD_CB)
pdca_enable_interrupt_reload_counter_zero(AIC23B_SSC_RX_PDCA_CHANNEL);
}
return true;
}
void aic23b_dac_start(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)
{
#if AIC23B_CTRL_INTERFACE == AIC23B_CTRL_INTERFACE_SPI
static const spi_options_t AIC23B_SPI_OPTIONS =
{
.reg = AIC23B_SPI_NPCS,
.baudrate = AIC23B_SPI_MASTER_SPEED,
.bits = AIC23B_CTRL_SIZE,
.spck_delay = 0,
.trans_delay = 0,
.stay_act = 0,
.spi_mode = 3,
.modfdis = 1
};
spi_setupChipReg(AIC23B_SPI, &AIC23B_SPI_OPTIONS, pba_hz);
#endif
aic23b_dac_stop();
gpio_enable_module(AIC23B_SSC_DAC_GPIO_MAP,
sizeof(AIC23B_SSC_DAC_GPIO_MAP) / sizeof(AIC23B_SSC_DAC_GPIO_MAP[0]));
aic23b_pdc_t pdc;
pdc.data = AIC23B_DEFAULT(AIC23B_PDC);
pdc.off = 0;
pdc.clk = 0;
pdc.osc = 0;
pdc.out = 0;
pdc.dac = 0;
pdc.adc = 1;
pdc.mic = 1;
pdc.line = 1;
aic23b_set_power_down_state(pdc);
aic23b_dac_setup(sample_rate_hz,
num_channels,
bits_per_sample,
swap_channels,
callback,
callback_opt,
pba_hz);
aic23b_aapc_t aapc;
aapc.data = AIC23B_DEFAULT(AIC23B_AAPC);
aapc.ste = 0;
aapc.dac = 1;
aapc.byp = 0;
aapc.micm = 1;
aapc.micb = 0;
aic23b_set_analog_audio_path(aapc);
aic23b_dapc_t dapc;
dapc.data = AIC23B_DEFAULT(AIC23B_DAPC);
dapc.dacm = 0;
dapc.deemp = AIC23B_DAPC_DEEMP_NONE;
dapc.adchp = 1;
aic23b_set_digital_audio_path(dapc);
// set an acceptable start volume
aic23b_set_headphone_volume(AIC23B_LEFT_CHANNEL | AIC23B_RIGHT_CHANNEL,
-30,
true);
aic23b_activate_dig_audio(true);
INTC_register_interrupt(&aic23b_ssc_tx_pdca_int_handler,
AIC23B_SSC_TX_PDCA_IRQ,
AIC23B_SSC_TX_PDCA_INT_LEVEL);
}
void aic23b_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)
{
#if defined(AIC23B_DAC_USE_RX_CLOCK) && AIC23B_DAC_USE_RX_CLOCK == true
#if defined(AIC23B_DAC_RX_CLOCK_SET_CALLBACK)
AIC23B_DAC_RX_CLOCK_SET_CALLBACK(2 * sample_rate_hz *
((bits_per_sample <= 16) ? 16 :
(bits_per_sample <= 20) ? 20 :
(bits_per_sample <= 24) ? 24 :
32));
#endif
ssc_i2s_init(AIC23B_SSC,
sample_rate_hz,
bits_per_sample,
(bits_per_sample <= 16) ? 16 :
(bits_per_sample <= 20) ? 20 :
(bits_per_sample <= 24) ? 24 :
32,
SSC_I2S_MODE_STEREO_OUT_EXT_CLK,
pba_hz);
#else
ssc_i2s_init(AIC23B_SSC,
sample_rate_hz,
bits_per_sample,
(bits_per_sample <= 16) ? 16 :
(bits_per_sample <= 20) ? 20 :
(bits_per_sample <= 24) ? 24 :
32,
SSC_I2S_MODE_STEREO_OUT,
pba_hz);
#endif
pdca_channel_options_t aic23b_ssc_pdca_options =
{
.addr = NULL,
.size = 0,
.r_addr = NULL,
.r_size = 0,
.pid = AIC23B_SSC_TX_PDCA_PID,
.transfer_size = (bits_per_sample <= 8) ? PDCA_TRANSFER_SIZE_BYTE :
(bits_per_sample <= 16) ? PDCA_TRANSFER_SIZE_HALF_WORD :
PDCA_TRANSFER_SIZE_WORD
};
pdca_init_channel(AIC23B_SSC_TX_PDCA_CHANNEL, &aic23b_ssc_pdca_options);
pdca_enable(AIC23B_SSC_TX_PDCA_CHANNEL);
#if !defined(AIC23B_DAC_USE_RX_CLOCK) || AIC23B_DAC_USE_RX_CLOCK == false || \
!defined(AIC23B_DAC_RX_CLOCK_SET_CALLBACK)
// Set DAC frequency
aic23b_configure_freq(AIC23B_MCLK_HZ, sample_rate_hz);
#endif
aic23b_daif_t daif;
daif.data = AIC23B_DEFAULT(AIC23B_DAIF);
daif.ms = AIC23B_DAIF_MS_SLAVE;
daif.lrswap = swap_channels;
daif.lrp = 0;
daif.iwl = (bits_per_sample <= 16) ? AIC23B_DAIF_IWL_16 :
(bits_per_sample <= 20) ? AIC23B_DAIF_IWL_20 :
(bits_per_sample <= 24) ? AIC23B_DAIF_IWL_24 :
AIC23B_DAIF_IWL_32;
daif.fmt = AIC23B_DAIF_FMT_I2S;
aic23b_write_reg(AIC23B_DAIF, daif.data);
aic23b_output_params.num_channels = num_channels;
aic23b_output_params.callback = callback;
aic23b_output_params.callback_opt = callback_opt;
}
#endif
bool aic23b_dac_output(void *sample_buffer, size_t sample_length)
{
bool global_interrupt_enabled;
if (!(pdca_get_transfer_status(AIC23B_SSC_TX_PDCA_CHANNEL) &
PDCA_TRANSFER_COUNTER_RELOAD_IS_ZERO))
return false;
if (sample_length)
{
if (aic23b_output_params.num_channels == 1)
{
int16_t *s16_sample_buffer = sample_buffer;
int i;
for (i = sample_length - 1; i >= 0; i--)
{
s16_sample_buffer[2 * i + 1] =
s16_sample_buffer[2 * i] = s16_sample_buffer[i];
}
}
// The PDCA is not able to synchronize its start of transfer with the SSC
// start of period, so this has to be done by polling the TF pin.
// Not doing so may result in channels being swapped randomly.
if ((global_interrupt_enabled = Is_global_interrupt_enabled()))
Disable_global_interrupt();
if (pdca_get_transfer_status(AIC23B_SSC_TX_PDCA_CHANNEL) &
PDCA_TRANSFER_COMPLETE)
{
while (gpio_get_pin_value(AIC23B_SSC_TX_FRAME_SYNC_PIN));
while (!gpio_get_pin_value(AIC23B_SSC_TX_FRAME_SYNC_PIN));
}
pdca_reload_channel(AIC23B_SSC_TX_PDCA_CHANNEL, sample_buffer, sample_length * 2);
pdca_get_reload_size(AIC23B_SSC_TX_PDCA_CHANNEL);
if (global_interrupt_enabled)
Enable_global_interrupt();
if (aic23b_output_params.callback_opt & AUDIO_DAC_OUT_OF_SAMPLE_CB)
pdca_enable_interrupt_transfer_complete(AIC23B_SSC_TX_PDCA_CHANNEL);
if (aic23b_output_params.callback_opt & AUDIO_DAC_RELOAD_CB)
pdca_enable_interrupt_reload_counter_zero(AIC23B_SSC_TX_PDCA_CHANNEL);
}
return true;
}
void ms3_dac_setup(U32 sample_rate_hz, U8 num_channels, U8 bits_per_sample,
bool swap_channels, void (*callback)(U32 arg), U32 callback_opt,
U32 pba_hz)
{
//configure clock
if (sample_rate_hz < (8000 + 8021) / 2) {
usb_stream_resync_frequency = 4096000;
cs2200_freq_clk_out(_32_BITS_RATIO(usb_stream_resync_frequency, CS2200_FREF));
}
else if (sample_rate_hz < (8021 + 22050) / 2) {
usb_stream_resync_frequency = 4106752;
cs2200_freq_clk_out(_32_BITS_RATIO(usb_stream_resync_frequency, CS2200_FREF));
}
else if (sample_rate_hz < (22050 + 32000) / 2) {
usb_stream_resync_frequency = 11289600;
cs2200_freq_clk_out(_32_BITS_RATIO(usb_stream_resync_frequency, CS2200_FREF));
}
else if (sample_rate_hz < (32000 + 44100) / 2) {
usb_stream_resync_frequency = 16384000;
cs2200_freq_clk_out(_32_BITS_RATIO(usb_stream_resync_frequency, CS2200_FREF));
}
else if (sample_rate_hz < (44100 + 48000) / 2) {
usb_stream_resync_frequency = 22579200;
cs2200_freq_clk_out(_32_BITS_RATIO(usb_stream_resync_frequency, CS2200_FREF));
}
else if (sample_rate_hz < (48000 + 88200) / 2) {
usb_stream_resync_frequency = 24576000;
cs2200_freq_clk_out(_32_BITS_RATIO(usb_stream_resync_frequency, CS2200_FREF));
}
//configure ssc to use clock on TX_CLOCK pin
AVR32_SSC.tcmr = (0 << AVR32_SSC_TCMR_CKO_OFFSET)
| (1 << AVR32_SSC_TCMR_STTDLY_OFFSET)
| (2 << AVR32_SSC_TCMR_CKS_OFFSET)
| (7 << AVR32_SSC_TCMR_START_OFFSET)
| (0x1f << AVR32_SSC_TCMR_PERIOD_OFFSET);
AVR32_SSC.tfmr = (0xf << AVR32_SSC_TFMR_DATLEN_OFFSET)
| (1 << AVR32_SSC_TFMR_MSBF_OFFSET)
| (1 << AVR32_SSC_TFMR_FSOS_OFFSET)
| (1 << AVR32_SSC_TFMR_FSLENHI_OFFSET)
| (0xf << AVR32_SSC_TFMR_FSLEN_OFFSET);
AVR32_SSC.cr = AVR32_SSC_CR_TXEN_MASK;
//configure DMA
pdca_channel_options_t ms3_ssc_pdca_options = {
.addr = NULL,
.size = 0,
.r_addr = NULL,
.r_size = 0,
.pid = AVR32_PDCA_PID_SSC_TX,
.transfer_size = (bits_per_sample <= 8)?PDCA_TRANSFER_SIZE_BYTE:
(bits_per_sample <= 16)?PDCA_TRANSFER_SIZE_HALF_WORD:
PDCA_TRANSFER_SIZE_WORD
};
pdca_init_channel(MS3_SSC_TX_PDCA_CHANNEL, &ms3_ssc_pdca_options);
pdca_enable(MS3_SSC_TX_PDCA_CHANNEL);
//configure audio parameters
ms3_output_params.num_channels = num_channels;
ms3_output_params.callback = callback;
ms3_output_params.callback_opt = callback_opt;
}
bool ms3_dac_output(void *sample_buffer, size_t sample_length)
{
bool global_interrupt_enabled;
if (!(pdca_get_transfer_status(MS3_SSC_TX_PDCA_CHANNEL) &
PDCA_TRANSFER_COUNTER_RELOAD_IS_ZERO))
return false;
if (sample_length) {
if (ms3_output_params.num_channels == 1) {
S16 *s16_sample_buffer = sample_buffer;
int i;
for (i = sample_length - 1; i >= 0; i--) {
s16_sample_buffer[2 * i + 1] =
s16_sample_buffer[2 * i] =
s16_sample_buffer[i];
}
}
// The PDCA is not able to synchronize its start of transfer with the SSC
// start of period, so this has to be done by polling the TF pin.
// Not doing so may result in channels being swapped randomly.
if ((global_interrupt_enabled = Is_global_interrupt_enabled()))
Disable_global_interrupt();
if (pdca_get_transfer_status(MS3_SSC_TX_PDCA_CHANNEL) &
PDCA_TRANSFER_COMPLETE) {
while (gpio_get_pin_value(MS3_SSC_TX_FRAME_SYNC_PIN));
while (!gpio_get_pin_value(MS3_SSC_TX_FRAME_SYNC_PIN));
}
pdca_reload_channel(MS3_SSC_TX_PDCA_CHANNEL, sample_buffer, sample_length * 2);
pdca_get_reload_size(MS3_SSC_TX_PDCA_CHANNEL);
if (global_interrupt_enabled)
Enable_global_interrupt();
if (ms3_output_params.callback_opt & AUDIO_DAC_OUT_OF_SAMPLE_CB)
pdca_enable_interrupt_transfer_complete(MS3_SSC_TX_PDCA_CHANNEL);
if (ms3_output_params.callback_opt & AUDIO_DAC_RELOAD_CB)
pdca_enable_interrupt_reload_counter_zero(MS3_SSC_TX_PDCA_CHANNEL);
}
return true;
}
