Hello,
I am trying to connect an MPU-6050 to my N548M4CB (Nordic nRF51422-CEAA, IC V2) from the N5 Starter Kit. To get accustom with TWI (Nordic's I2C), I've been trying to run the example code from the link below:
https://devzone.nordicsemi.com/question/48894/hardware-twii2c-example/
But every time I build in the Keil ARM-MDK using SoftDevice S110, I get many path errors like this:
compiling main.c...
..\..\main.c(55): warning: #223-D: function "CONCAT_2" declared implicitly
const nrf_drv_twi_t p_twi_instance =
RF_DRV_TWI_INSTANCE(1); // Set up TWI instance 1 with default values
..\..\main.c(55): error: #20: identifier "NRF_TWI" is undefined
const nrf_drv_twi_t p_twi_instance =
RF_DRV_TWI_INSTANCE(1); // Set up TWI instance 1 with default values
..\..\main.c(55): warning: #223-D: function "CONCAT_3" declared implicitly
const nrf_drv_twi_t p_twi_instance =
RF_DRV_TWI_INSTANCE(1); // Set up TWI instance 1 with default values
..\..\main.c(55): error: #20: identifier "TWI" is undefined
const nrf_drv_twi_t p_twi_instance =
None of the libraries and dependencies appear to be working. Furthermore, I've tried deselecting all of the TWI drivers and just including paths to all files in \Keil_v5\ARM\Device\Nordic\components. But it looks like I have to include a path to every sub-directory possible, which isn't very efficient.
I still haven't got TWI working because of this. Has anyone had this issue? Should I be using an older SDK for rev.2 IC's? The N5 starter kit recommends 9.0 but I don't know if 6.1 is better with TWI. (I've heard their twi_hw_master drivers are identical though)
I'd really appreciate some help!
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On a side note, the N5 starter kit comes with 2 new N5150M5CD models but they are missing their FCC ID. What does this mean? Can we not legally use these boards or something?
Thanks,
Andrew
