I2S loopback example missing in installation folder

RE: I2S loopback example missing in installation folder

Anjaneyulu Sana — Wed, 29 Jul 2020 13:07:22 GMT

Hi Didrik,

Thanks a lot for helping in fixing the crash issue.

Regards,

Sana

RE: I2S loopback example missing in installation folder

Didrik Rokhaug — Wed, 29 Jul 2020 12:40:38 GMT

Hi, and sorry for the slow responses.

Due to summer vacations here in Norway, we are a bit short on staff at the moment.

During the summer, we have had some students working on a project using I2S.

As a part of that project, they made a simple demo showing how to use the nrfx I2S driver: https://github.com/siguhe/NCS_I2S_nrfx_driver_example

Best regards,

Didrik

RE: I2S loopback example missing in installation folder

Anjaneyulu Sana — Tue, 28 Jul 2020 12:54:34 GMT

Hi,
In the above provided example, nrfx_i2s_start() is not used.

My project is crashing in nrfx_i2s_start() function.

Can you please help in resolving this issue?

RE: I2S loopback example missing in installation folder

haakonsh — Fri, 24 Jul 2020 10:54:28 GMT

devzone.nordicsemi.com/.../i2s.zip

I don't know why you're modifying an integration test sample. I attached a project the should serve as a template to test the I2S peripheral.

I'm going on vacation for a week, but I'll assign your case to another Tech Supporter.

BR,
Håkon.

RE: I2S loopback example missing in installation folder

Anjaneyulu Sana — Thu, 23 Jul 2020 11:40:22 GMT

Do you have any update on this?

RE: I2S loopback example missing in installation folder

Anjaneyulu Sana — Wed, 22 Jul 2020 13:08:14 GMT

devzone.nordicsemi.com/.../nrfProj.zip

I have attached my project here. I am using this for nrf5340 board.

Please help me in resolving crash issue.

RE: I2S loopback example missing in installation folder

haakonsh — Wed, 22 Jul 2020 12:22:50 GMT

I can't see anything wrong here, can you share the whole project so that I can debug it on my side?

RE: I2S loopback example missing in installation folder

Anjaneyulu Sana — Tue, 21 Jul 2020 14:12:09 GMT

Can you please check the above code and let me know if I am doing anything wrong?

RE: I2S loopback example missing in installation folder

Anjaneyulu Sana — Mon, 20 Jul 2020 15:12:51 GMT

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");
}

}

RE: I2S loopback example missing in installation folder

haakonsh — Mon, 20 Jul 2020 14:38:02 GMT

Can you share your I2S specific code?

RE: I2S loopback example missing in installation folder

Anjaneyulu Sana — Mon, 20 Jul 2020 07:27:29 GMT

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?

RE: I2S loopback example missing in installation folder

haakonsh — Fri, 17 Jul 2020 13:08:03 GMT

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.

RE: I2S loopback example missing in installation folder

Anjaneyulu Sana — Fri, 17 Jul 2020 10:21:03 GMT

Is there any update on this issue?

RE: I2S loopback example missing in installation folder

Anjaneyulu Sana — Thu, 16 Jul 2020 08:38:30 GMT

haakonsh Can you please answer my questions posted above?

RE: I2S loopback example missing in installation folder

Anjaneyulu Sana — Wed, 15 Jul 2020 09:51:18 GMT

Can you please answer my question posted above?

RE: I2S loopback example missing in installation folder

Anjaneyulu Sana — Tue, 14 Jul 2020 13:34:29 GMT

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?

RE: I2S loopback example missing in installation folder

haakonsh — Tue, 14 Jul 2020 12:25:37 GMT

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.

RE: I2S loopback example missing in installation folder

Anjaneyulu Sana — Tue, 14 Jul 2020 11:37:25 GMT

Can you please let me know where can I find examples for I2S receive/transmit which used "nrfx_i2s_init" and related functions?

RE: I2S loopback example missing in installation folder

Anjaneyulu Sana — Tue, 14 Jul 2020 09:46:34 GMT

SDK vesrion v1.3 for nrf5340

RE: I2S loopback example missing in installation folder

haakonsh — Tue, 14 Jul 2020 09:17:24 GMT

[quote user="Anjaneyulu Sana"]I found I2S loopback example in <InstallFolder>\tests\drivers\i2s.[/quote]

What SDK are you using?

RE: I2S loopback example missing in installation folder

Anjaneyulu Sana — Tue, 14 Jul 2020 06:08:33 GMT

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?

RE: I2S loopback example missing in installation folder

haakonsh — Mon, 13 Jul 2020 14:40:16 GMT

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