There is a problem adding I2S code.

RE: There is a problem adding I2S code.

schosdas — Thu, 21 Jan 2021 23:56:44 GMT

Oh... I see..
I'll try a little more.

Thank you.

RE: There is a problem adding I2S code.

awneil — Thu, 21 Jan 2021 10:44:45 GMT

[quote userid="92575" url="~/f/nordic-q-a/70686/there-is-a-problem-adding-i2s-code/290384#290384"]I solved this problem by disabling NRFX_ASSERT().[/quote]

Err ... No, that's doesn't solve the problem - it just masks the symptoms!

😮

An Assert is to tell you when you're doing stuff wrong; removing the Assert means you're still doing stuff wrong - just not being told about it!

RE: There is a problem adding I2S code.

schosdas — Thu, 21 Jan 2021 04:33:54 GMT

Hello
Thank you so much for your help.

I solved this problem by disabling NRFX_ASSERT().

Thank you!

RE: There is a problem adding I2S code.

Håkon Alseth — Wed, 20 Jan 2021 13:30:01 GMT

Hi,

in the nrfx_i2s.c driver, it assumes that you use SCK and LRCK:

static void configure_pins(nrfx_i2s_config_t const * p_config)
{
    uint32_t mck_pin, sdout_pin, sdin_pin;

    // Configure pins used by the peripheral:

    // - SCK and LRCK (required) - depending on the mode of operation these
    //   pins are configured as outputs (in Master mode) or inputs (in Slave
    //   mode).
    if (p_config->mode == NRF_I2S_MODE_MASTER)
    {
        nrf_gpio_cfg_output(p_config->sck_pin);
        nrf_gpio_cfg_output(p_config->lrck_pin);
    }
    ....

When the preprocessor symbol "DEBUG_NRF" is defined, it enables the NRFX_ASSERT(), and it asserts on the nrf_gpio_cfg()->nrf_gpio_pin_port_decode() function unless the input pin is within a valid range for the target device you're compiling for.

If you supply it with any unused pin, it should not assert. You can alternatively patch the above function with an additional if pin != NRFX_I2S_PIN_NOT_USED.

Kind regards,

Håkon

RE: There is a problem adding I2S code.

schosdas — Wed, 20 Jan 2021 09:45:14 GMT

Hello
Thank you for your help.

I am also referring to that example, but I mainly referred to the example of the site below.

https://github.com/cheehieu/nrf52-sk6812-led-driver#overview

For an error caused by not specifying a valid pin, should I replace the pin I'm using with another pin?

Thank you.

RE: There is a problem adding I2S code.

awneil — Wed, 20 Jan 2021 09:03:17 GMT

[quote userid="92575" url="~/f/nordic-q-a/70686/there-is-a-problem-adding-i2s-code"]controlling several ws2812 LEDs through I2S[/quote]

So you're looking at this: https://electronut.in/nrf52-i2s-ws2812/ ?

RE: There is a problem adding I2S code.

awneil — Wed, 20 Jan 2021 08:59:48 GMT

[quote userid="92575" url="~/f/nordic-q-a/70686/there-is-a-problem-adding-i2s-code"] NRFX_ASSERT(nrf_gpio_pin_present_check(*p_pin)); // < < error [/quote]

So the nrf_gpio_pin_present_check is failing - ie, it thinks you are not specifying a valid pin.

Look into nrf_gpio_pin_present_check() to see if you can find that error code ...

Use the debugger to see what is being passed...

RE: There is a problem adding I2S code.

awneil — Wed, 20 Jan 2021 08:54:44 GMT

(sorry, the forum really messed that up - why is it not possible to quote source code?! 😞 )