identifier "p_tx_buffer" is undefined on nrf52832

[Cole]

I am trying to add spi communication to the twi_master_with_twis_slave project because I need to communicate with two different sensors. I have included nrf_drv_spi.h and enabled SPI in the config file, but I keep getting an error for the buffer identifiers not being defined. I can't seem to find where these are supposed to be defined to help me figure out what I am missing.

here is my build output: *** Using Compiler 'V5.06 update 4 (build 422)', folder: 'C:\Keil_v5\ARM\ARMCC\Bin' Build target 'nrf52832_xxaa' compiling nrf_drv_spi.c... C:\Keil_v5\ARM\PACK\NordicSemiconductor\nRF_Drivers\4.0.0-2.alpha\spi_master\nrf_drv_spi.c(519): error: #20: identifier "p_tx_buffer" is undefined

SSERT(p_tx_buffer != NULL || tx_buffer_length == 0); C:\Keil_v5\ARM\PACK\NordicSemiconductor\nRF_Drivers\4.0.0-2.alpha\spi_master\nrf_drv_spi.c(519): error: #20: identifier "tx_buffer_length" is undefined

SSERT(p_tx_buffer != NULL || tx_buffer_length == 0); C:\Keil_v5\ARM\PACK\NordicSemiconductor\nRF_Drivers\4.0.0-2.alpha\spi_master\nrf_drv_spi.c(520): error: #20: identifier "p_rx_buffer" is undefined

SSERT(p_rx_buffer != NULL || rx_buffer_length == 0); C:\Keil_v5\ARM\PACK\NordicSemiconductor\nRF_Drivers\4.0.0-2.alpha\spi_master\nrf_drv_spi.c(520): error: #20: identifier "rx_buffer_length" is undefined

SSERT(p_rx_buffer != NULL || rx_buffer_length == 0); C:\Keil_v5\ARM\PACK\NordicSemiconductor\nRF_Drivers\4.0.0-2.alpha\spi_master\nrf_drv_spi.c: 0 warnings, 4 errors "._build\nrf52832_xxaa.axf" - 4 Error(s), 0 Warning(s). Target not created. Build Time Elapsed: 00:00:01

Thanks for the help,

Cole

[Sigurd]

Are you using Keil? Have you added nrf_drv_spi.c to the project? And made sure the path to nrf_drv_spi.c is included in the Keil "Include Paths"

[Cole]

I had not yet added "nrf_drv_spi.c" to the Keil "Include Paths". I did this by going to "options for target" then C/C++ and adding the path to the file. I have tried adding nrf_drv_spi.c and .h files to a group and through the software pack selecter. Doing both just gives me the same 4 errors twice.

I can't tell where these identifiers are defined or what files I may be missing. When I choose "go to definition" it opens up the browser. In there it looks like these are just parameters to the nrf_rv_spi_transfer() function.

[Sigurd]

I see now that you are using cmsis pack, and maybe a very old version of the SDK. Packs is now deprecated, see this blog post. I recommend that you download SDK 12.2 from here.

[Cole]

So I should not be adding drivers through the software packs or the "manage run time environment" button in the Keil IDE? Should I instead be adding the driver files from the SDK 12.2 to a new group in the project?

[Sigurd]

Yes, add the driver files from the SDK 12.2 to a new group in the project (or an existing one e.g. nRF_Drivers). Also make sure that the path to the driver is included: Options for Target->C/C++->Include Paths. And that you have activated the driver/module in sdk_config.h(Here I recommend using the configuration wizard).