i2cDevlib port to nRF52 SDK15

RE: i2cDevlib port to nRF52 SDK15

awneil — Wed, 28 Apr 2021 10:03:46 GMT

What, exactly, is "not working" ?

Have you looked at the SDK examples?

RE: i2cDevlib port to nRF52 SDK15

usmanmehmood55 — Wed, 28 Apr 2021 06:42:08 GMT

Hi Awneil.

I cannot use the Arduino framework, I have to stick to the baremetal C for my app.

The issue starts when the TWI is initialized. On the top, my old (working) code and the i2cDevlib (not working) code seem very alike. I even swapped the working initialization code with the non working one, but that doesn't work either.

Working code:

static const nrf_drv_twi_t twi_instance = NRF_DRV_TWI_INSTANCE(TWI_INSTANCE_ID);
void twi_init(void)
{
    ret_code_t err_code;

    const nrf_drv_twi_config_t twi_config = {
        .scl = TWI_SCL_PIN,
        .sda = TWI_SDA_PIN,
        .frequency = NRF_DRV_TWI_FREQ_400K,
        .interrupt_priority = APP_IRQ_PRIORITY_LOW,
        .clear_bus_init = false};

    err_code = nrf_drv_twi_init(&twi_instance, &twi_config, NULL, NULL);
    APP_ERROR_CHECK(err_code);
    nrf_drv_twi_enable(&twi_instance);
}

Not working code:

static const nrf_drv_twi_t m_twi = NRF_DRV_TWI_INSTANCE(0);
void i2cdev_initialize(void)
{
    ret_code_t err_code;

    const nrf_drv_twi_config_t config = {
        .scl = SCL_PIN,
        .sda = SDA_PIN,
        .frequency = NRF_TWI_FREQ_400K,
        .interrupt_priority = APP_IRQ_PRIORITY_HIGH};
        
    err_code = nrf_drv_twi_init(&m_twi, &config, NULL, NULL);
    APP_ERROR_CHECK(err_code);
}

RE: i2cDevlib port to nRF52 SDK15

awneil — Tue, 27 Apr 2021 11:11:39 GMT

[quote userid="94615" url="~/f/nordic-q-a/74493/i2cdevlib-port-to-nrf52-sdk15"]Any help in this matter would be highly appreciated[/quote]

It's not clear how far you've got, and where you're stuck on this?

Does the i2cDevlib site/documentation provide guidance for porting?

Have you tried the i2cDevlib forums: http://www.i2cdevlib.com/contact

One would hope that it would be well-structure, so the target-specific stuff should be well-isolated ... ?

EDIT

Step 1 under 'Implementation' seems to be the key: http://www.i2cdevlib.com/usage