RE: unable to write to and read from a FRAM using i2c in nrf52 sdk 11

Reshma Tomy — Thu, 12 Dec 2019 11:19:36 GMT

Hi Jorgen,

Thanks for replying, The pins used were 3 and 4. The actual issue was the wrong slave address. Unlike other mpu API's , here we need not select the last bit of slave addressing, ie R/W. The slave address is 7bit. nrf_drv_twi_rx sets it for reading and nrf_drv_twi_tx sets it for write. I was unaware of that. I should have written the code" #define ADDR_24LC02 0x50 "instead of " #define ADDR_24LC02 0xA0". Now it's working.

RE: unable to write to and read from a FRAM using i2c in nrf52 sdk 11

Jørgen Holmefjord — Mon, 09 Dec 2019 14:39:00 GMT

Hi,

Which pin numbers are you using for the SDA/SCL pins? Can you post the full code you are using?

Error 3 is caused by:

NRF_ERROR_INTERNAL

If an error was detected by hardware.

Best regards,
Jørgen