nRF52832

RE: nRF52832

Yuvaraj V — Wed, 13 Mar 2019 03:47:06 GMT

Thank you Simon... Please keep support like this...

RE: nRF52832

Yuvaraj V — Wed, 13 Mar 2019 03:45:42 GMT

Thank you julienh... Please keep support like this...

RE: nRF52832

Simon — Tue, 12 Mar 2019 16:21:52 GMT

The line "static const nrf_drv_twi_t m_twi = NRF_DRV_TWI_INSTANCE(TWI_INSTANCE_ID)" creates a TWI instance (as julienh mentioned). The TWI instance is of the type nrf_drv_twi_t, which is a struct with the following fields:

typedef struct
{
    uint8_t inst_idx;
    union
    {
#ifdef TWIM_PRESENT
        nrfx_twim_t twim;
#endif
#ifdef TWI_PRESENT
        nrfx_twi_t  twi;
#endif
    } u;
    bool    use_easy_dma;
} nrf_drv_twi_t

The function NRF_DRV_TWI_INSTANCE() will create an instance of the struct above. The input can be either 0 or 1, and decides if one should use TWI instance 0 or 1 of the nRF52832 chip. If EasyDMA is enabled in the SoftDevice TWIM will be used and the field use_easy_dma will be set to true.

If you are new to Nordic's chips, I would recommend you to take a look at the link provided by julienh, and go through the steps listed (at least the first four).

Best regards,

Simon

RE: nRF52832

julienh — Tue, 12 Mar 2019 12:30:36 GMT

Check out this link https://www.nordicsemi.com/DocLib/Content/SDK_Doc/nRF5_SDK/v15-3-0/nrf51_getting_started and all the examples in the SDK.

NRF_DRV_TWI_INSTANCE is used to create a TWI instance (I2C). You can find everything about that in the documentation