(Error #540) Error #L6218E undefined symbol nrf_drv_twi_init

[talha]

Hi,

I was trying to complie my code but the Keil is giving this error, which I am pretty sure is about the recent update that I have downloaded. I am using nRF51822xxAA and the error I am receiving is:

Error #540: 'ARM::CMSIS:CORE:4.3.0' component is not available for target 'nrf51822_xxaa_s130',
pack 'ARM.CMSIS.4.5.0' is not selected

What can I do to fix this issue?

Thanks in advance

Edit: Ok, I have fixed the error #540 by installing an older version of the CMSIS pack (4.5.0) but now I am having another error about the nrf_drv_twi.h class. The error states that the function is not defined but isn't this a built in function? What should I do? The error is:

.\_build\nrf51422_xxac_s130.axf: Error: L6218E: Undefined symbol nrf_drv_twi_enable
(referred from sensor.o).

Thanks for your help

[talha]

Ok so the solution to both of these problems are as the following:

1- Error #540: This is probably happening because you are not using the proper version of that software pack. You need to download an earlier (or the latest) version of the said packet and then you need to include them using "Select Software Packs" (it is right side of the "Options for Target"). After that your code should compile without an issue.

2- Error #L6218E: This is probably happening because you haven't defined the function. If it is one of the built-in functions make sure you added the .c file to your project. If you haven't right-click on any of the files on your project side-bar, select "Add an existing file" and navigate to the .c file.