TWI is not worked! please help me...

[Sean]

Hello, I use nrf52810 custom board and icm42605 6 axis sensor with twi.

device address is 0x69, I tried read data reg 0x75 for read chipset id.

I think that sensor sent ack for address and register number, but clk is not pulled up, so device is stuck.

not any running of twi handler.

for using twi, I set sdk_config.h as bellow. I use sdk 17.0.2

#define NRFX_TWIM_ENABLED 1

#define NRFX_TWI_ENABLED 1

#define NRFX_TWI0_ENABLED 1

#define TWI0_ENABLED 1

Please help me what can I do?

I apologize for my short English skills.

Thanks.

[Carl Richard]

Hi, rightlife!

Thanks for reaching out. It will be easier for me to help you if you could share your code or at least the relevant parts of it.

Do you have a pull-up for the SCL line?

Best regards,
Carl Richard

[Sean]

Thank you for reply,

SCL and SDA lines are pull-up and in case of using twi examples in sdk, twi is not working.

So I think that it is cause of difference of 52832 and 52810 chipsets(in DK, twi is works well).

I'm just use twi init like example, write 1 byte of data using nrf_drv_twi_tx. It's that all.

Thanks.

[Sean]

I found solution at Nordic Semiconductor Infocenter.

In docuement, 

6. Remove the following files from the project: <compiler>_startup_nrf52.s and system_nrf52.c.
7. Add the following files to the project: <compiler>_startup_nrf52810.s and system_nrf52810.c.

I think name of files for nrf52832 is nrf52, so common using file. But ..._nrf52810.c files exist. I changed file names in makefile and it works fine.

Thank you.

[Carl Richard]

Hello again!

Good to hear that you found the solution! Please mark your comment as the answer, so that it could help others. 

Have a good day.

Best regards,
Carl Richard