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error i2c methods not found, even nrf_drv_twi.c not found

Ajad

Hi all.

I was planning to build ble example and combining it with I2C, but I found this error

.\_build\nrf52811_xxaa.axf: Error: L6218E: Undefined symbol nrf_drv_twi_init (referred from i2c.o).
.\_build\nrf52811_xxaa.axf: Error: L6218E: Undefined symbol nrfx_twi_enable (referred from i2c.o).
.\_build\nrf52811_xxaa.axf: Error: L6218E: Undefined symbol nrfx_twi_is_busy (referred from i2c.o).
.\_build\nrf52811_xxaa.axf: Error: L6218E: Undefined symbol nrfx_twi_rx (referred from i2c.o).
.\_build\nrf52811_xxaa.axf: Error: L6218E: Undefined symbol nrfx_twi_tx (referred from i2c.o).

I check several previous posts on this forum before and solution is to add nrf_drv_twi.c but I can't find that file in .../components/drivers_nrf/twi_master folder. Anybody have ideas? Thanks.

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