I2C in nrf51 SDK

[rushin]

I want to interface ADXl345 with nrf51 SDK. suppoose my device address is 0x53 and register address is 0x2D and i want to write value 8. now nordic i2c has function nrf_drv_twi_tx with attributes nrf_drv_twi_t const *const p_instance, uint8_t address, uint8_t const * p_data, uint32_t length, bool xfer_pending

now here my address is 0x53, length is 6. now can you tell me where to write register address? where to write data??

[bjorn-spockeli]

Hi Rushin,

you can take a look at the driver I wrote for the ADXL375. Its for the nRF52 SDK, but the twi_driver API should be close to identical with that of the nRF51 SDK.

ADXL375_I2C.zip

[rushin]

thanks i will try it

[rushin]

it is giving me data. but my data is not changing

[bjorn-spockeli]

Are you using RTT to print the data? Are you just getting zeroes or actual values?

[rushin]

thanks its working

[rushin]

can you tell me purpose of this ADXL375_I2C_data_rate_set(),ADXL375_I2C_offsets_set() function? without it i can also get data.