static inline void stop_i2s_playback(struct snd_soc_dai *cpu_dai)
{
i2s_set_fifo_irq_on_err(cpu_dai->id, I2S_FIFO_TX, 0);
i2s_set_fifo_irq_on_qe(cpu_dai->id, I2S_FIFO_TX, 0);
i2s_fifo_enable(cpu_dai->id, I2S_FIFO_TX, 0);
while (i2s_get_status(cpu_dai->id) & I2S_I2S_FIFO_TX_BUSY);
}
/**
* \brief Internal interrupt handler for I2S.
*/
static void i2s_interrupt_handler(I2sc *i2sc)
{
uint32_t row_num;
struct i2s_dev_inst i2s_instance;
i2s_instance.hw_dev = i2sc;
uint32_t status = i2s_get_status(&i2s_instance);
uint32_t mask = i2s_get_interrupt_mask(&i2s_instance);
#if defined(ID_I2SC1)
if (i2sc == I2SC1) {
row_num = 1;
}
#endif
#if defined(ID_I2SC0)
if (i2sc == I2SC0) {
row_num = 0;
}
#endif
if ((status & I2SC_SR_RXRDY) && (mask & I2SC_IMR_RXRDY)) {
i2s_callback_pointer[row_num][I2S_INTERRUPT_RXRDY]();
}
if ((status & I2SC_SR_RXOR) && (mask & I2SC_IMR_RXOR)) {
i2s_callback_pointer[row_num][I2S_INTERRUPT_RXOR]();
}
if ((status & I2SC_SR_TXRDY) && (mask & I2SC_IMR_TXRDY)) {
i2s_callback_pointer[row_num][I2S_INTERRUPT_TXRDY]();
}
if ((status & I2SC_SR_TXUR) && (mask & I2SC_IMR_TXUR)) {
i2s_callback_pointer[row_num][I2S_INTERRUPT_TXUR]();
}
if ((status & I2SC_SR_RXRDY) && (mask & I2SC_IMR_ENDRX)) {
i2s_callback_pointer[row_num][I2S_INTERRUPT_ENDRX]();
}
if ((status & I2SC_SR_RXOR) && (mask & I2SC_IMR_ENDTX)) {
i2s_callback_pointer[row_num][I2S_INTERRUPT_ENDTX]();
}
if ((status & I2SC_SR_TXRDY) && (mask & I2SC_IMR_RXFULL)) {
i2s_callback_pointer[row_num][I2S_INTERRUPT_RXBUFF]();
}
if ((status & I2SC_SR_TXUR) && (mask & I2SC_IMR_TXEMPTY)) {
i2s_callback_pointer[row_num][I2S_INTERRUPT_TXBUFE]();
}
}
/**
* \brief Test audio data transfer and receive.
*
* \param test Current test case.
*/
static void run_i2s_test(const struct test_case *test)
{
uint32_t i;
struct i2s_config config;
struct i2s_dev_inst dev_inst;
Pdc *p_i2sc_pdc;
Pdc *p_i2sc_pdc2;
pdc_packet_t pdc_i2sc_packet_tx, pdc_i2sc_packet_rx;
pdc_packet_t pdc2_i2sc_packet_tx, pdc2_i2sc_packet_rx;
/* Set the configuration */
i2s_get_config_defaults(&config);
config.data_format = I2S_DATE_16BIT;
config.fs_ratio = I2S_FS_RATE_256;
config.loopback = true;
i2s_init(&dev_inst, I2SC0, &config);
/* Enable the I2SC module. */
i2s_enable(&dev_inst);
/* Get pointer to I2SC PDC register base */
p_i2sc_pdc = i2s_get_pdc_base(&dev_inst);
p_i2sc_pdc2 = (Pdc *)((uint32_t)p_i2sc_pdc + 0x100U);
/* Initialize PDC data packet for transfer */
pdc_i2sc_packet_tx.ul_addr = (uint32_t) output_samples_left;
pdc_i2sc_packet_tx.ul_size = SOUND_SAMPLES;
pdc_i2sc_packet_rx.ul_addr = (uint32_t) input_samples_left;
pdc_i2sc_packet_rx.ul_size = SOUND_SAMPLES;
pdc2_i2sc_packet_tx.ul_addr = (uint32_t) output_samples_right;
pdc2_i2sc_packet_tx.ul_size = SOUND_SAMPLES;
pdc2_i2sc_packet_rx.ul_addr = (uint32_t) input_samples_right;
pdc2_i2sc_packet_rx.ul_size = SOUND_SAMPLES;
/* Configure PDC for data transfer */
pdc_tx_init(p_i2sc_pdc, &pdc_i2sc_packet_tx, NULL);
pdc_rx_init(p_i2sc_pdc, &pdc_i2sc_packet_rx, NULL);
pdc_tx_init(p_i2sc_pdc2, &pdc2_i2sc_packet_tx, NULL);
pdc_rx_init(p_i2sc_pdc2, &pdc2_i2sc_packet_rx, NULL);
/* Enable PDC transfers */
pdc_enable_transfer(p_i2sc_pdc, PERIPH_PTCR_TXTEN | PERIPH_PTCR_RXTEN);
pdc_enable_transfer(p_i2sc_pdc2, PERIPH_PTCR_TXTEN | PERIPH_PTCR_RXTEN);
/* Enable the functions */
i2s_enable_transmission(&dev_inst);
i2s_enable_clocks(&dev_inst);
/**
* Since the transfer and receive timing is not under control, we
* need adjust here the enable sequence and add some delay
* functions if it's needed.
*/
for (i = 0; i < 0x8; i++) {
input_samples_left[i] = i;
}
i2s_enable_reception(&dev_inst);
/* Wait transfer complete */
while (!(i2s_get_status(&dev_inst) & I2SC_SR_RXBUFF)) {
}
/**
* Wait a moment to let the PDC finish. The status bit is cleared
* before all transfer finish.
*/
delay_us(10);
/* Disable the PDC module. */
pdc_disable_transfer(p_i2sc_pdc, PERIPH_PTCR_RXTDIS| PERIPH_PTCR_TXTDIS);
pdc_disable_transfer(p_i2sc_pdc2, PERIPH_PTCR_RXTDIS| PERIPH_PTCR_TXTDIS);
/* Disable the I2SC module. */
i2s_disable(&dev_inst);
/* Compare the data. */
for (i = 0; i < SOUND_SAMPLES; i++) {
if ((input_samples_left[i] != output_samples_left[i]) ||
(input_samples_right[i] != output_samples_right[i])) {
flag = false;
}
}
test_assert_true(test, flag == true, "Audio data did not match!");
}
