nrf52840 bit baging drivers

RE: nrf52840 bit baging drivers

mahi354 — Tue, 05 Apr 2022 07:13:37 GMT

Thank you for your assistance; the problem has been handled utilising the bit bagging method.

RE: nrf52840 bit baging drivers

Vidar Berg — Wed, 30 Mar 2022 06:57:55 GMT

Please see the edit in my previous reply.

RE: nrf52840 bit baging drivers

mahi354 — Tue, 29 Mar 2022 15:03:50 GMT

Good day, sir.

Should I utilise the what containing the deprecated drivers what is provided in sdk 17.1 if we are only seeking for bit bagging drivers?

Please clarify whether or not using these drivers will make it work.
the path
is D:\SDK 17.1\DeviceDownload\
nRF5 SDK 17.1.0 ddde560\
nRF5 SDK 17.1.0 ddde560\components\drivers nrf\twi master
If you know of any nrf updated bit bagging drivers that I should use, please let me know.

please check this link ,we have same problem kindly suggest the solution

Please see this link for more details; we had the same problem.
https://devzone.nordicsemi.com/f/nordic-q-a/48166/i2c-clock-stretching-on-nrf52840

RE: nrf52840 bit baging drivers

Vidar Berg — Tue, 29 Mar 2022 13:39:28 GMT

Thanks for the clarification. So I would avoid using clock stretching if possible (e.g use polling instead) so you can use the new driver. If that's not an option, then you can access the undocumented power register directly.

        //equivalent to NRF_TWI0->POWER
        *(volatile uint32_t *) (NRF_TWI0_BASE + 0xFFC)

Edit: It looks like only TWIM (TWIM — I2C compatible two-wire interface master with EasyDMA) is affected by the clock stretching issue, not the TWI (TWI — I2C compatible two-wire interface). So this means you should be able to use the new driver as long as you disable the TWI0_USE_EASY_DMA setting in sdk_config.h and use TWI instead of TWIM.

Also, the deprecated TWI bit banging implementation (/components/drivers_nrf/twi_master/deprecated/twi_sw_master.c) does not use the TWI/TWIM HW blocks, but controls everything in SW using 2 GPIOs.

RE: nrf52840 bit baging drivers

mahi354 — Tue, 29 Mar 2022 07:53:52 GMT

Good day, sir.

Thank you for the follow-up.

We tried TWI and TWIM, but we had issues with clock starching, and we couldn't communicate effectively, so we chose to utilize the bit bagging approach.

Could you kindly recommend updated bit bagging drivers?

Please see this link for more details; we had the same problem.
https://devzone.nordicsemi.com/f/nordic-q-a/48166/i2c-clock-stretching-on-nrf52840

Is it possible to use the bit bagging drivers that go with it?

RE: nrf52840 bit baging drivers

Vidar Berg — Tue, 29 Mar 2022 06:44:42 GMT

Hello,

This is an old deprecated driver. You should use the new one here: TWI master.