I setup NRF SDK using nrfconnectsetup341ia32 executable.
I2S example file should be located at <InstallFolder>\examples\peripheral\i2s according to https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.sdk5.v11.0.0%2Fi2s_example_loopback.html.
But no such folder is available.
Can you please help?
nRF Connect SDK does not have an I2S loopback example. To use the I2S with NCS and the nRF5340 you will have to use the nRFX drivers in "ncs root"\modules\hal\nordic\nrfx\drivers\src\nrfx_i2s.c
Thank you for your reply.
I found I2S loopback example in <InstallFolder>\tests\drivers\i2s.
However this example does not use nrfx_i2s_init or any related functions.
On compiling and running this "Assertion failed at ../src/test_i2s_loopback.c:42: test_i2s_tx_transfer_configure_0: (dev_i2s is NULL) device I2S_0 not found" error occurred.
Can you please let me know if what should be I2S device name to be used?
Can you please let me know where can I find I2S receive/transmit example which uses "nrfx_i2s_init" and related functions?
Can you please let me know where can I find examples for I2S receive/transmit which used "nrfx_i2s_init" and related functions?
We don't have any example for I2S in nRF Connect SDK yet.
Although Zephyr has unit tests for its driver API for I2S it does not mean that there is support for the zephyr driver in NCS yet.
You can use the nRFX I2S drivers directly by adding #include <nrfx.h> to your source file
See "ncs root"\modules\hal\nordic\nrfx\drivers\src\nrfx_i2s.c.
When I am using "nrfx_i2s_init", build is failing with undefined reference to "nrfx_i2s_init".
Can you please help me in resolving this issue?
Are there any dependencies that I need to add or any CMakeList changes needs to be done for this?
Can you please answer my question posted above?
haakonsh Can you please answer my questions posted above?
haakonsh Can you please answer my questions posted above?
Is there any update on this issue?
Add CONFIG_NRFX_I2S=y to prj.conf file in order to include the driver's source file in the build system.
Add #include <nrfx_i2s.h> to your main.c file.
Thank you for this information. I am able to build and run the application.
When I ran the application i got "E: >>> ZEPHYR FATAL ERROR 1: Unhandled interrupt on CPU 0" error. "nrfx_i2s_init" is successful. I used 26, 27, 28, 29, 30 for sck_pin, lrck_pin, mck_pin, sdout_pin and sdin_pin respectively.
When "nrfx_i2s_start" is called, app crashed with above mentioned error.
When debugged further, crash occurred inside "nrf_i2s_task_trigger" function.
Can you please let me know how to fix this error?
Can you please let me know what pins should I be using for IN, OUT and clocks of I2S?
Can you share your I2S specific code?
Here is the code used
#include <zephyr.h>
#include <ztest.h>
#include <device.h>
#include <drivers/i2s.h>
#include <nrf.h>
#include <nrfx.h>
#include <nrfx_i2s.h>
#include "i2s_api_test.h"
static void data_handler(nrfx_i2s_buffers_t const * p_released,
uint32_t status)
{
if(p_released != NULL) {
if(p_released->p_rx_buffer != NULL) {
printf("RX buffer received\n");
} else if(p_released->p_tx_buffer) {
printf("TX buffer received\n");
} else {
printf("RX/TX buffer not received\n");
}
} else {
printf("Received buffers are NULL\n");
}
}
#define PAUSE_TIME 500
#define I2S_BUFFER_SIZE 1000
static uint32_t m_buffer_rx[I2S_BUFFER_SIZE];
static uint32_t m_buffer_tx[I2S_BUFFER_SIZE];
void test_main(void)
{
nrfx_i2s_config_t i2s_cfg = NRFX_I2S_DEFAULT_CONFIG(0, 1, 17, 20, 22);
nrfx_i2s_buffers_t nrx_buf;
nrx_buf.p_rx_buffer = m_buffer_rx;
nrx_buf.p_tx_buffer = m_buffer_tx;
err_code = nrfx_i2s_init(&i2s_cfg, data_handler);
printf("nrfx_i2s_init return code is %u\n", err_code);
for(index = 0; index < 10; index++)
{
err_code = nrfx_i2s_start(&nrx_buf, I2S_BUFFER_SIZE, 0);
printf("nrfx_i2s_start return code is %u\n", err_code);
k_sleep(K_MSEC(100));
nrfx_i2s_stop();
printf("After nrfx_i2s_stop \n");
}
}
