Unable to interface ES8388 with nrf5340DK.

[Ajaysinh]

HI, Developers.

  i am trying to interface ES8388 codec with nrf5340DK. but unfortunately i can't understand how to interface with this board. The ES8388 is successfully interface with i2c protocol and i able to read and write register. but in case of i2s i can't understand why it is not working, here IRQ- EVENT is worked !.  

Here i Already tried 1] SAMPLE/DRIVER/I2S/ECHO example, 2] NCS_I2S_nrfx_driver example,  3] the test example I2S-speed and I2S-api test. 4] LOOPBACK .

1. now in ECHO example i got this error : 

[00:00:01.960,235] <err> i2s_nrfx: Failed to allocate next RX buffer: -12
Failed to read data: -11

 here is project file :  echo_ESP.zip

       2. Now in NCS_I2S_nrfx_driver by siguhe example :  i got print sound is " 0,0,0,0,0,0,0,0,0"  and also i find the in 

data_handler() function p_rx_buffer is null.  

 

if (p_released)
	{
		if (p_released->p_rx_buffer != NULL)
		{
			data_ready_flag = true; //This is used in print_sound()
		}
	}
	

>>> one more thing in this project is suggested its configure as Non-Secure peripherals. so they edited nrf/subsys/spm/Kconfig, inside the menu  "Configure Non-Secure peripherals": 

config SPM_NRF_I2S0_NS
	bool "I2S0 is Non-Secure"
	default y

and  nrf/subsys/spm/spm.c: 

#ifdef NRF_I2S0
        PERIPH("NRF_I2S0", NRF_I2S0, CONFIG_SPM_NRF_I2S0_NS),
#endif

  but this file is no longer available in current NCS version.

    3.  Now in i2s test api  example : i got this errors: 

 4] . now in loopback example : i got 

 

 here the received sample right /left  data is always got ffff/ffff  and mismatch with send data !. 

 here is the project file : loopback.zip 

 

Finally I am a current beginner in this embedded system. So I apologize if I have made many mistakes in this project. 

if i make mistake in interfacing peripheral  or i misunderstand processes of interfacing peripheral. so please right  processes of interfacing unknown peripheral. 
and also give me a tutorial or reference of it So that I can correct my mistakes well. 
 
Thank you. 

[Einar Thorsrud]

Hi,

I suggest you go through nRF Connect SDK fundamentals on the Nordic Developer Academy.

[Ajaysinh]

i already did it. i am able to start-up es8388 in project.  but i can't  able to interface or read mic data and  transmit  data over i2s. 

As mentioned above I am in trouble.

[Einar Thorsrud]

one more thing in this project is suggested its configure as Non-Secure peripherals. so they edited nrf/subsys/spm/Kconfig, inside the menu  "Configure Non-Secure peripherals": 

Where did you find these old projects? Can you link to the DevZone case or similar where they are from? Regardless though, the SPM has been deprecated for quite some time now so these projects must be old, so you will have quite a few API changes you need to take into account. I would also recommend that you do not make a non-secure build for now. While that may be sensible in many applications, I would not add another layer of complexity at this moment.

[Ajaysinh]

okay understand.  but whats about sample I2S-ECHO ?. and  loopback example ? 

[Einar Thorsrud]

The I2S echo sample should work out of the box on the nRF5340 DK with NCS 2.4.2 with WM8731, but I do not have an I2S device so I have not been able to do it myself. If it does not for you, can you explain which NCS version  you are using, how you are testing (including physical setup) and which changes to the sample did you do for your test setup (includign using ES8388)?

Regarding loopback, it seems you have something based on zephyr/samples/drivers/audio/dmic/? That should also work on the DK out of the box and does so on my desk. Have you tested that?