static int dw_i2s_trigger(struct snd_pcm_substream *substream,
int cmd, struct snd_soc_dai *dai)
{
struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(dai);
int ret = 0;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
dev->active++;
i2s_start(dev, substream);
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
dev->active--;
i2s_stop(dev, substream);
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
/******************************************************************************
* FunctionName : gen_carrier_clk
* Description : gen 38khz carrier clk
* Parameters : NONE
* Returns : NONE
*******************************************************************************/
void gen_carrier_clk()
{
#if (IR_NEC_TX_IO_MUX == PERIPHS_IO_MUX_U0RXD_U)
//CONFIG I2S TX PIN FUNC
PIN_FUNC_SELECT(PERIPHS_IO_MUX_U0RXD_U, FUNC_I2SO_DATA);
i2s_start(); //START
#else
os_printf("Please select right GPIO for IIS TX data\r\n");
#endif
}
int main(void)
{
uint16_t i;
char temp_char;
uint8_t num_chars_ret;
// For CS4272 (uC i2s interface in slave mode) not sure about
// initialization sequence (i2s interface first, or setup cs4272 first)
// For now, start with codec (get interface clocks started first)
// Initialize USB
usb_init();
delay(100);
// Initialize I2C subsystem
i2c_init();
delay(100);
for(i = 0; i < 64; i++)
{
buffer[i] = 0;
}
// Wait to setup codec to make sure user has turned on audio board power
while((buffer[0] != 'y') && (buffer[0] != 'Y'))
{
serial_write_string("Init codec? (y/n)\r\n>");
// Wait for response
num_chars_ret = serial_read_line(buffer,64);
if(num_chars_ret < 1)
{
serial_write_string("Error reading line. Please try again.\r\n");
}
}
for(i = 0; i < 64; i++)
{
buffer[i] = 0;
}
// Initialize CS4272
codec_init();
delay(100);
// Initialize I2S subsystem
i2s_init();
delay(10);
serial_write_string("Codec Initialized\r\n");
delay(10);
// Test to see if i2c is working
uint8_t reg_result;
uint8_t ii;
for(ii = 1; ii < 9; ii++)
{
itoa(ii,buffer,10);
serial_write_string("Address ");
serial_write_string(buffer);
serial_write_string(": ");
reg_result = codec_read(ii);
itoa(reg_result,buffer,10);
serial_write_string(buffer);
serial_write_string("\r\n");
delay(100);
}
for(i = 0; i < 64; i++)
{
buffer[i] = 0;
}
serial_write_string("Waiting 10 seconds for ADC high pass filter to stabilize\r\n");
delay(10000);
while(1)
{
// Initialize indices, etc
tx_buf_idx = 0;
rx_buf_idx = 0;
curr_run = 0;
for(i = 0; i < NUM_SAMP; i++)
{
//recv_data_real[i] = 0;
//recv_data_imag[i] = 0;
recv_data_right[i] = 0;
//recv_data_left[i] = 0;
}
for(i = 0; i < 64; i++)
{
buffer[i] = 0;
}
while((buffer[0] != 'y') && (buffer[0] != 'Y'))
{
serial_write_string("Start test? (y/n)\r\n>");
// Wait for response
num_chars_ret = serial_read_line(buffer,64);
if(num_chars_ret < 1)
{
serial_write_string("Error reading line. Please try again.\r\n");
}
}
// Start test
serial_write_string("Starting test.\r\n");
//output_real_part = 1;
test_running = 1;
i2s_start();
// Wait for real part to finish
while(test_running)
{
//serial_write_string("Running real part. Please wait .....\r\n");
delay(1000);
}
// Test is now finished
// serial_write_string("Real part is finished. Starting imaginary part.\r\n");
//
// delay(1000);
//
// // Start imaginary part
// output_real_part = 0;
// test_running = 1;
// i2s_start();
//
// // Wait for real part to finish
// while(test_running)
// {
// //serial_write_string("Running imaginary part. Please wait .....\r\n");
// delay(1000);
// }
//
// // Test is now finished
// serial_write_string("Imaginary part is finished. Printing Data.\r\n");
// Print data
for(i = 0; i < NUM_SAMP; i++)
{
itoa(recv_data_right[i],buffer,10);
serial_write_string(buffer);
serial_write_string(",");
itoa(recv_data_left[i],buffer,10);
serial_write_string(buffer);
serial_write_string("\r\n");
delay(50);
}
serial_write_string("End of data.\r\n");
}
return 0;
}
