I2C while using a Softdevice with nRF51822

[muhkuhns]

Hello,

I read a while in this forum and found out it might be a little tricky to get I2C working when using a Softdevice. Is that information still valid or outdated?

developer.nordicsemi.com/.../a00784.html

Could I use this on a nRF51822 based module with S110 loaded to talk with my I2C enabled sensor?

Kind Regards muhkuhns

[RK]

I have no idea (and you didn't post a link) what makes you think there is a problem getting I2C to work with the softdevice. It works just fine.

[Susheel Nuguru]

Just tested it myself, I2C works fine with S110 on SDK8.0.

[muhkuhns]

Thanks for trying it out! Did you test it with the functions from my link?

[muhkuhns]

For example here: devzone.nordicsemi.com/.../

or here: devzone.nordicsemi.com/.../

[Susheel Nuguru]

I have not tested the burst mode, but looking at the function code it looks like the read address is hardcoded into the library.

void sdio_read_burst(uint8_t * target_buffer, uint8_t target_buffer_size) {
    uint_fast8_t address = 0x63;

This is most probably not correct address for your slave device and you need to change it. If it is still not working then I would recommend you to check the maximum and mimum clock speeds of your device and check if this driver is not clocking too fast.