Issue including hardware peripherals to a project with softdevice loaded. TWI master communication issue.

RE: Issue including hardware peripherals to a project with softdevice loaded. TWI master communication issue.

Vidar Berg — Tue, 05 Nov 2019 07:04:13 GMT

Glad to hear that you found the solution. Thanks for updating the thread. I didn't get time to look at your project before.

RE: Issue including hardware peripherals to a project with softdevice loaded. TWI master communication issue.

Tandon — Tue, 05 Nov 2019 01:12:21 GMT

https://devzone.nordicsemi.com/f/nordic-q-a/29041/how-to-enable-p0-09-and-p0-10-as-gpio-pins-on-the-nrf52-instead-of-nfc-pins

This fixes it. NFC didn't allow for data transfer.

RE: Issue including hardware peripherals to a project with softdevice loaded. TWI master communication issue.

Tandon — Mon, 04 Nov 2019 21:06:50 GMT

Any luck? Any questions I may be able to answer?

RE: Issue including hardware peripherals to a project with softdevice loaded. TWI master communication issue.

Tandon — Mon, 04 Nov 2019 15:25:03 GMT

devzone.nordicsemi.com/.../ble_5F00_app_5F00_uart_5F00_TWI.zip

Thanks I appreciate it. SDK 14.2.0 and softdevice is attached as well..devzone.nordicsemi.com/.../7446.s132_5F00_nrf52_5F00_5.0.0_5F00_softdevice.hex

RE: Issue including hardware peripherals to a project with softdevice loaded. TWI master communication issue.

Vidar Berg — Mon, 04 Nov 2019 15:07:42 GMT

0x0 is the return code for NRF_SUCCESS which is what you normally want a function call to return. Any other value indicates that an error occurred.

[quote user="Tandon"]I see the same when everything in int main() is commented out. Only soft device is loaded. I have verified the functionality of the chip with out a softdevice loaded. Any similar issues youve encountered in the past? I also have raised the priority to 3[/quote]

The Softdevice should not impact the application if it's not doing anything. E.g., maintaining active BLE connections, etc. It will not write anything to the GPIO or TWI registers.

Maybe you can upload your whole project (the last one with everything in main() commented out)? I can try to do some debugging here.

RE: Issue including hardware peripherals to a project with softdevice loaded. TWI master communication issue.

Tandon — Sun, 03 Nov 2019 21:33:06 GMT

State of Pins: TCK: 0, TDI: 0, TDO: 0, TMS: 1, TRES: 1, TRST: 1

is this pin config?

RE: Issue including hardware peripherals to a project with softdevice loaded. TWI master communication issue.

Tandon — Sun, 03 Nov 2019 02:35:59 GMT

after nrf_drv_twi_tx; err_code is returned as 0x0000; what does that mean?

RE: Issue including hardware peripherals to a project with softdevice loaded. TWI master communication issue.

Tandon — Sun, 03 Nov 2019 02:26:09 GMT

How can I read back the pin config?

RE: Issue including hardware peripherals to a project with softdevice loaded. TWI master communication issue.

Tandon — Sun, 03 Nov 2019 02:25:35 GMT

I see the same when everything in int main() is commented out. Only soft device is loaded. I have verified the functionality of the chip with out a softdevice loaded. Any similar issues youve encountered in the past? I also have raised the priority to 3

RE: Issue including hardware peripherals to a project with softdevice loaded. TWI master communication issue.

Vidar Berg — Wed, 30 Oct 2019 11:01:12 GMT

Is it possible that one or both TWI pins are being overridden by BSP,etc? Do you see the same if you comment this line in main(): buttons_leds_init(). Can you read-back the pin configuration when you're stuck in the while loop?

RE: Issue including hardware peripherals to a project with softdevice loaded. TWI master communication issue.

Tandon — Tue, 29 Oct 2019 21:01:12 GMT

This is in I2C wrapper.c line 57

RE: Issue including hardware peripherals to a project with softdevice loaded. TWI master communication issue.

Tandon — Tue, 29 Oct 2019 21:00:45 GMT

Seems like the data doesn't transfer at all....

I stepped through the code and don't any clock of data cycle when

err_code = nrf_drv_twi_tx(&I2C_twi_master, ptrDevice, m_txbuf, sizeof(m_txbuf), nostop);

is written

RE: Issue including hardware peripherals to a project with softdevice loaded. TWI master communication issue.

Vidar Berg — Tue, 29 Oct 2019 15:18:30 GMT

The frequency should be fine. Do you have access to a scope or logic analyzer so you can see if any data is being transferred at all? I think it's a bit strange that the callback is not getting called.

RE: Issue including hardware peripherals to a project with softdevice loaded. TWI master communication issue.

Tandon — Tue, 29 Oct 2019 15:08:50 GMT

Yes, it is under I2C wrapper. c line 80

I lowered the priority and it is still stuck. I even had to to the highest priority?

Should I change the frequency?

My twi config is on main.c lines 380-410

RE: Issue including hardware peripherals to a project with softdevice loaded. TWI master communication issue.

Vidar Berg — Tue, 29 Oct 2019 15:03:02 GMT

Is that while loop shown in the code you uploaded here? Have you tried changing the interrupt priority?

RE: Issue including hardware peripherals to a project with softdevice loaded. TWI master communication issue.

Tandon — Tue, 29 Oct 2019 14:44:18 GMT

The while loop is in the code for the TWI driver.

I am unable to check for NRF_DRV_TWI_EVT_DONE, NRF_DRV_TWI_EVT_ADDRESS_NACK or NRF_DRV_TWI_EVT_DATA_NACK

as the twi_handler is never called upon when softdevice is loaded.

twi_handler gets called when softdevice is not loaded and using only the ARM processor.

RE: Issue including hardware peripherals to a project with softdevice loaded. TWI master communication issue.

Vidar Berg — Tue, 29 Oct 2019 14:38:41 GMT

Hi,

[quote user=""]I was able to get this to work very well with out a softdevice, however once I loaded a soft device, the program gets stuck in a while loop.[/quote]

Is the while loop in your code, or is it inside the Softdevice? Also, are you able to check if you receive any NRF_DRV_TWI_EVT_ADDRESS_NACK or NRF_DRV_TWI_EVT_DATA_NACK in your callback?

Thanks,

Vidar

edit: I would also have considered changing the interrupt priority of TWI to APP_IRQ_PRIORITY_LOWEST to be aligned with the other SDK modules.

RE: Issue including hardware peripherals to a project with softdevice loaded. TWI master communication issue.

Tandon — Mon, 28 Oct 2019 19:14:47 GMT

Relevant code here is

main.c - lines 319 - 335; lines 380-410; called upon in line 1023

I2C wrapper.c - lines 31 - 88