Error: L6218E

Question

I am running into these 3 errors while compiling my program. I tried fixing sdk_config.h. 
 .\_build
rf52832_xxaa.axf: Error: L6218E: Undefined symbol app_uart_init (referred from main.o). .\_build
rf52832_xxaa.axf: Error: L6218E: Undefined symbol nrfx_twim_enable (referred from main.o). .\_build
rf52832_xxaa.axf: Error: L6218E: Undefined symbol nrfx_twim_rx (referred from main.o). 
 Am I still missing anything else in sdk_config.h to make it work?

tesc · Accepted Answer

Hi, 
 I was not talking about the NRFX_TWI* defines, but the set of legacy layer TWI* defines. Have a look at the sdk_config.h file from a twi example in the SDK (you find them under <sdk folder>/examples/peripheral). There are many defines, such as TWI_ENABLED, TWI0_ENABLED, TWIM_ENABLED, TWIM0_ENABLED, TWIM1_ENABLED, etc. You may need to set both the NRFX_TWI* define and the corresponding TWI* define in sdk_config.h, in order not to get any trouble. If those defines are missing from your sdk_config.h file then you need to copy them (for instance from the sdk_config.h file of one of the twi examples.) 
 Please also have a look at the comment from awneil regarding .c source files. Are they all added to the project? 
 Regards, Terje

tesc · Answer

Hi, 
 Sorry for the delay. 
 In your screenshot I do not see the file nrfx_twim.c in the project. That file is where nrfx_twim_enable is implemented. 
 What error messages (if any) do you get now? (After adding nrfx_twim.c if missing.) 
 Regards, Terje

Error: L6218E

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