'TWI0_INSTANCE_INDEX' undeclared

[framacpa]

Hello, my setup is nrf51822, with SDK 10.

I try to create application to drive I2C components and I get compilations errors: In function 'Hal_I2cInit': ../../../nrf5-sdk/components/drivers_nrf/twi_master/nrf_drv_twi.h:73:29: error: 'TWI0_INSTANCE_INDEX' undeclared (first use in this function) .instance_id = CONCAT_3(TWI, id, _INSTANCE_INDEX) \

that I don't understand.

the nrf_drv_config.h file has been modified to change "#define TWI0_ENABLED 0" to "#define TWI0_ENABLED 1"

If someone can explain please the issue, it would be nice thanks BR

[MartinBL]

1. Have you started a project from scratch or do you use a TWI peripheral example from the SDK folder?
2. Have you downloaded the ZIP-file version of the SDK or are you using Pack Installer?
3. In which folder is your nrf_drv_config.h file located? I seem to recall some issues with different config files in different folders.
4. Why don't you upgrade to SDK 11?

[MartinBL]

If you are starting with an empty project I see no reason why you should not just start with SDK 11?

I think you definitely should make sure that TWI0_ENABLED is enabled in the correct config file.

This is a very simple TWI example that might get you started with an empty project and TWI.