suspect-devices/circuitpython/ports/nrf/supervisor, branch master

nrf: add ticks (not subticks) to overflow count during reset

2020-05-27T03:28:50+00:00

Signed-off-by: Sean Cross

nrf: port: save rtc value across reboots

2020-05-27T03:28:49+00:00

As part of the reset process, save the current tick count to an uninitialized memory location. That way, the current tick value will be preserved across reboots. A reboot will cause us to lose a certain number of ticks, depending on how long a reboot takes, however if reboots are infrequent then this will not be a large amount of time lost. Signed-off-by: Sean Cross

nrf: reset watchdog as part of port_reset()

2020-05-27T03:28:49+00:00

Signed-off-by: Sean Cross

nrf: boot into safe mode sometimes for watchdog reset

2020-05-27T03:28:49+00:00

If the watchdog resets the system and we're plugged into USB, boot into safe mode. Signed-off-by: Sean Cross

nrf: port: add memory barrier before wfi

2020-05-21T13:46:37+00:00

ARM recommends issuing a DSB instruction propr to issuing WFI, as it is required on many parts suchas Cortex-M7. This is effectively a no-op on the Cortex-M4 used in most NRF parts, however it ensures that we won't be surprised when new parts come out. See http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dai0321a/BIHICBGB.html for more information. Signed-off-by: Sean Cross

nrf: disable interrupts before running wfi

2020-05-21T13:43:52+00:00

In order to ensure we don't have any outstanding requests, disable interrupts prior to issuing `WFI`. As part of this process, check to see if there are any pending USB requests, and only execute the `WFI` if there is no pending data. This fixes #2855 on NRF. Signed-off-by: Sean Cross

Merge pull request #2932 from simmel-project/nrf-rtc-reset

2020-05-20T18:39:16+00:00

nrf: reset rtc as part of port_reset()

2020-05-20T08:44:18+00:00

On NRF, the `rtc_reset()` function is never called. As a result, calls to `time.time()` return a cryptic error> ``` >>> import time >>> time.time() '' object has no attribute 'datetime' >>> ``` This is because `MP_STATE_VM(rtc_time_source)` is not initialized due to `rtc_reset()` never being called. If `CIRCUITPY_RTC` is enabled, call `rtc_reset()` as part of the `reset_port()` call. This ensures that `time.time()` works as expected. Signed-off-by: Sean Cross

Merge remote-tracking branch 'adafruit/master' into esp32s2

2020-05-18T23:46:41+00:00

nrf: port: call common_hal_rtc_init() during init

2020-05-18T03:52:30+00:00

Call the new function to set the RTC, or reset it if the offset is not valid. Signed-off-by: Sean Cross