cpu/nrf9160: add twi and spi support #16814

dylad · 2021-09-05T20:26:41Z

Contribution description

This PR adds support for I2C and SPI for nRF9160 MCUs.
Since these IPs are the same as nRF52. I moved SPI and I2C code to nrf5x_common (I did not touch nRF51 drivers). And I also recreate a SPI/I2C irq handler to match the behaviour of nrf52 platform.

It would be good to ensure nothing is broken on nRF52 platform with this PR but I don't have the hardware with me for now.

Testing procedure

on nRF52 based board and nRF9160dk, use tests/periph_i2c and tests/periph_spi to test.

I provide some output from my custom nRF9160 based board:

tests/driver_hts221:

2021-09-05 22:14:24,606 # main(): This is RIOT! (Version: 2021.04-devel-2410-gc333e-pr/cpu/nrf9160_add_twi_and_spi_support)
2021-09-05 22:14:24,607 # Init HTS221 on I2C_DEV(0)
2021-09-05 22:14:24,664 # H: 63.0%, T: 37.0°C
2021-09-05 22:14:26,704 # H: 62.7%, T: 29.1°C
2021-09-05 22:14:28,743 # H: 63.4%, T: 29.1°C
2021-09-05 22:14:30,782 # H: 63.3%, T: 29.2°C
2021-09-05 22:14:32,820 # H: 62.9%, T: 29.2°C
2021-09-05 22:14:34,860 # H: 62.6%, T: 29.2°C
2021-09-05 22:14:36,899 # H: 62.2%, T: 29.3°C
2021-09-05 22:14:38,938 # H: 61.9%, T: 29.3°C
2021-09-05 22:14:40,976 # H: 61.6%, T: 29.4°C
2021-09-05 22:14:43,016 # H: 61.2%, T: 29.4°C
2021-09-05 22:14:45,054 # H: 60.9%, T: 29.3°C

tests/mtd_raw:

2021-09-05 22:13:34,852 # reboot
2021-09-05 22:13:34,859 # main(): This is RIOT! (Version: 2021.04-devel-2408-ga599-pr/cpu/nrf9160_add_twi_and_spi_support)
2021-09-05 22:13:34,860 # Manual MTD test
2021-09-05 22:13:34,862 # init MTD_0… OK (16 MiB)
> test 0
2021-09-05 22:13:37,203 # test 0
2021-09-05 22:13:37,204 # [START]
2021-09-05 22:13:37,423 # [SUCCESS]

Issues/PRs references

None.

boards/nrf9160dk/include/periph_conf.h

cpu/nrf5x_common/periph/Makefile

cpu/nrf9160/spi_twi_irq.c

boards/nrf9160dk/include/periph_conf.h

benpicco

Looks good, please squash!

benpicco · 2021-09-06T15:42:53Z

I think it would make sense to merge cpu/nrf52 and cpu/nrf9160.
Isn't the nrf9160 just a nrf52 with a LTE modem attached?

dylad · 2021-09-06T16:23:31Z

Not really. nRF9160 is a cortex-m33 but they share the same peripherals with a few difference.

dylad · 2021-09-06T16:28:00Z

I would like someone to check if this PR didn't not break something in nRF52 SPI and I2C before merging if possible.
I don't have the required hardware with me.

benpicco · 2021-09-06T16:51:28Z

Sure, let me run tests/mtd_raw (for SPI flash) with USEMODULE += i2c_scan on nrf52840dk:

> 2021-09-06 18:49:40,590 # main(): This is RIOT! (Version: 2021.10-devel-548-ge52b5-HEAD)
2021-09-06 18:49:40,591 # Manual MTD test
2021-09-06 18:49:40,593 # init MTD_0… OK (8 MiB)
> info
2021-09-06 18:50:12,875 # info
2021-09-06 18:50:12,876 # mtd devices: 1
2021-09-06 18:50:12,877 #  -=[ MTD_0 ]=-
2021-09-06 18:50:12,878 # sectors: 2048
2021-09-06 18:50:12,880 # pages per sector: 16
2021-09-06 18:50:12,882 # page size: 256
2021-09-06 18:50:12,883 # total: 8 MiB
> test 0
2021-09-06 18:52:55,650 # test 0
2021-09-06 18:52:55,650 # [START]
2021-09-06 18:52:55,907 # [SUCCESS]

I attached a AT24C EEPROM to the I2C bus

> i2c_scan 0
2021-09-06 18:50:15,627 # i2c_scan 0
2021-09-06 18:50:15,630 # Scanning I2C device 0...
2021-09-06 18:50:15,636 # addr not ack'ed = "-", addr ack'ed = "X", addr reserved = "R", error = "E"
2021-09-06 18:50:15,639 #      0 1 2 3 4 5 6 7 8 9 a b c d e f
2021-09-06 18:50:15,643 # 0x00 R R R R R R R R R R R R R R - -
2021-09-06 18:50:15,648 # 0x10 - - - - - - - - - - - - - - - -
2021-09-06 18:50:15,653 # 0x20 - - - - - - - - - - - - - - - -
2021-09-06 18:50:15,659 # 0x30 - - - - - - - - - - - - - - - -
2021-09-06 18:50:15,665 # 0x40 - - - - - - - - - - - - - - - -
2021-09-06 18:50:15,670 # 0x50 X - - - - - - - - - - - - - - -
2021-09-06 18:50:15,676 # 0x60 - - - - - - - - - - - - - - - -
2021-09-06 18:50:15,680 # 0x70 - - - - - - - - R R R R R R R R

still works!

dylad · 2021-09-06T18:22:40Z

Squashed, thanks for testing on nRF52 platform !

benpicco · 2021-09-06T20:15:32Z

hm looks like you need something like

--- a/pkg/nimble/Makefile.dep
+++ b/pkg/nimble/Makefile.dep
@@ -42,7 +42,7 @@ endif
 # nimble controller dependencies
 ifneq (,$(filter nimble_controller,$(USEMODULE)))
   USEMODULE += nimble_transport_ram
-  ifneq (,$(filter nrf5%,$(CPU_FAM)))
+  ifneq (,$(filter nrf9160 nrf5%,$(CPU_FAM)))
     USEMODULE += nimble_drivers_nrf5x
   endif
 endif

fjmolinas · 2021-09-07T06:56:51Z

hm looks like you need something like

--- a/pkg/nimble/Makefile.dep
+++ b/pkg/nimble/Makefile.dep
@@ -42,7 +42,7 @@ endif
 # nimble controller dependencies
 ifneq (,$(filter nimble_controller,$(USEMODULE)))
   USEMODULE += nimble_transport_ram
-  ifneq (,$(filter nrf5%,$(CPU_FAM)))
+  ifneq (,$(filter nrf9160 nrf5%,$(CPU_FAM)))
     USEMODULE += nimble_drivers_nrf5x
   endif
 endif

Hmm no you would need more than that, this is based on the fact that mynewt-nimble needs to initialize nrf5 timers see https://github.com/apache/mynewt-nimble/blob/master/porting/nimble/src/hal_timer.c, and so we do the same when using mynewt-core for this. But AFAIKT in nimble this is only for nrf52 so no guarantees this works for nrf9*. Please apply this patch instead:

diff --git a/pkg/nimble/Makefile.dep b/pkg/nimble/Makefile.dep
index 07d4caf282..45e8d47ec8 100644
--- a/pkg/nimble/Makefile.dep
+++ b/pkg/nimble/Makefile.dep
@@ -18,7 +18,9 @@ USEMODULE += nimble_porting_nimble
 ifneq (,$(filter mynewt-core,$(USEPKG)))
   USEMODULE += mynewt-core_os
   USEMODULE += mynewt-core_util
-  USEMODULE += mynewt-core_nrf5x_hal
+  ifneq (,$(filter nrf5%,$(CPU)))
+    USEMODULE += mynewt-core_nrf5x_hal
+  endif
 else
   # uwb-% requires mynewt-core so is incompatible with nimble_npl_riot
   ifeq (,$(filter uwb%,$(USEPKG)))
diff --git a/pkg/uwb-core/Makefile.dep b/pkg/uwb-core/Makefile.dep
index b4f0c0355a..fd59855a7a 100644
--- a/pkg/uwb-core/Makefile.dep
+++ b/pkg/uwb-core/Makefile.dep
@@ -25,7 +25,7 @@ endif
 ifneq (,$(filter uwb-core_dpl,$(USEMODULE)))
   USEPKG += mynewt-core
   USEMODULE += mynewt-core_os
-  ifneq (,$(filter nrf%,$(CPU)))
+  ifneq (,$(filter nrf5%,$(CPU)))
     USEMODULE += mynewt-core_nrf5x_hal
   endif
 endif

dylad · 2021-09-07T06:59:52Z

Wait wait wait, why should nimble even tries to compile on nRF9160 ? It doesn't have a bluetooth radio !

fjmolinas · 2021-09-07T07:04:37Z

Wait wait wait, why should nimble even tries to compile on nRF9160 ? It doesn't have a bluetooth radio !

Then its unrelated, it just appplies to uwb-core, you can apply the patch there only.

dylad · 2021-09-07T07:07:52Z

you can apply the patch there only.

Sadly, this is not enough. I've got new errors then.
I'll look further later today.

fjmolinas · 2021-09-07T07:12:08Z

you can apply the patch there only.

Sadly, this is not enough. I've got new errors then.
I'll look further later today.

I'll find the fix, this is a bad assumption on my side with the pkg. This should do:

diff --git a/pkg/mynewt-core/contrib/Makefile b/pkg/mynewt-core/contrib/Makefile
index 0bb65a903f..c16f097dad 100644
--- a/pkg/mynewt-core/contrib/Makefile
+++ b/pkg/mynewt-core/contrib/Makefile
@@ -3,7 +3,7 @@ MODULE = mynewt-core
 # exclude submodule sources from *.c wildcard source selection
 SRC := $(filter-out nrf5x_isr.c cputime.c,$(wildcard *.c))
 
-ifneq (,$(filter nrf%,$(CPU)))
+ifneq (,$(filter nrf5%,$(CPU)))
   SRC += nrf5x_isr.c
 else
   SRC += cputime.c
diff --git a/pkg/mynewt-core/mynewt-core_os.mk b/pkg/mynewt-core/mynewt-core_os.mk
index 8077bdeabe..6bfbccbb1b 100644
--- a/pkg/mynewt-core/mynewt-core_os.mk
+++ b/pkg/mynewt-core/mynewt-core_os.mk
@@ -8,7 +8,7 @@ SRC := \
   os_cputime_pwr2.c \
   #
 
-ifneq (,$(filter nrf%,$(CPU)))
+ifneq (,$(filter nrf5%,$(CPU)))
   SRC += os_cputime.c
 endif
 
diff --git a/pkg/uwb-core/Makefile.dep b/pkg/uwb-core/Makefile.dep
index b4f0c0355a..fd59855a7a 100644
--- a/pkg/uwb-core/Makefile.dep
+++ b/pkg/uwb-core/Makefile.dep
@@ -25,7 +25,7 @@ endif
 ifneq (,$(filter uwb-core_dpl,$(USEMODULE)))
   USEPKG += mynewt-core
   USEMODULE += mynewt-core_os
-  ifneq (,$(filter nrf%,$(CPU)))
+  ifneq (,$(filter nrf5%,$(CPU)))
     USEMODULE += mynewt-core_nrf5x_hal
   endif
 endif

dylad · 2021-09-07T07:15:51Z

@fjmolinas Your last patch did the trick ! Thanks for your help :)
Should we apply this patch as a separate commit in this PR or open another as this is unrelated ?

fjmolinas · 2021-09-07T07:19:22Z

@fjmolinas Your last patch did the trick ! Thanks for your help :)
Should we apply this patch as a separate commit in this PR or open another as this is unrelated ?

Separete commit is fine IMO

As nRF9160 doesn't have a bluetooth radio, we should not pull the same dependencies as nRF52, thus ensure these dependencies are only added for nrf5x families

dylad · 2021-09-08T07:31:23Z

any last words for this one ?

tests/periph_spi: printing and testing SPI clock rates drivers/periph_spi: change API of spi_acquire (from RIOT-OS#15904) drivers/periph_spi: add the `bus` parameter to spi_get_*() This was necessary for implementations where multiple devices can have different clock sources. This broke the macros SPI_CLK_* that were reverted to an enum. periph/spi: adapted to the new API Arbitrary speed support was added to all implementations where it was missing except kinetis. nrf52/periph/spi: moved in nfr5x_common (RIOT-OS#16814)

tests/periph_spi: printing and testing SPI clock rates drivers/periph_spi: change API of spi_acquire (from RIOT-OS#15904) drivers/periph_spi: add the `bus` parameter to spi_get_*() This was necessary for implementations where multiple devices can have different clock sources. This broke the macros SPI_CLK_* that were reverted to an enum. periph/spi: adapted to the new API Arbitrary speed support was added to all implementations where it was missing. nrf52/periph/spi: moved in nfr5x_common (RIOT-OS#16814)

dylad requested review from aabadie, cgundogan, haukepetersen, jia200x and leandrolanzieri as code owners September 5, 2021 20:26

github-actions bot added Area: boards Area: Board ports Area: cpu Area: CPU/MCU ports Area: Kconfig Area: Kconfig integration Platform: ARM Platform: This PR/issue effects ARM-based platforms labels Sep 5, 2021

dylad force-pushed the pr/cpu/nrf9160_add_twi_and_spi_support branch from 393fcdf to 87c732d Compare September 5, 2021 20:38

benpicco reviewed Sep 6, 2021

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benpicco reviewed Sep 6, 2021

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benpicco approved these changes Sep 6, 2021

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dylad added 2 commits September 6, 2021 20:15

cpu/nrf9160: add TWI and SPI support

1beda0f

boards/nrf9160dk: add TWI and SPI configuration

0c60a2a

dylad force-pushed the pr/cpu/nrf9160_add_twi_and_spi_support branch from e52b537 to 0c60a2a Compare September 6, 2021 18:21

dylad added the CI: ready for build If set, CI server will compile all applications for all available boards for the labeled PR label Sep 6, 2021

dylad added 2 commits September 7, 2021 09:27

pkg/mynewt-core: don't pull unwanted dependencies for nRF9160

ed655ab

As nRF9160 doesn't have a bluetooth radio, we should not pull the same dependencies as nRF52, thus ensure these dependencies are only added for nrf5x families

pkg/uwb-core: don't pull unwanted dependencies for nRF9160

633ddee

As nRF9160 doesn't have a bluetooth radio, we should not pull the same dependencies as nRF52, thus ensure these dependencies are only added for nrf5x families

github-actions bot added Area: build system Area: Build system Area: pkg Area: External package ports labels Sep 7, 2021

benpicco merged commit bcaaaec into RIOT-OS:master Sep 8, 2021

dylad deleted the pr/cpu/nrf9160_add_twi_and_spi_support branch September 8, 2021 17:50

hugueslarrive added a commit to hugueslarrive/RIOT that referenced this pull request Sep 11, 2021

nrf52/periph/spi: moved in nfr5x_common (RIOT-OS#16814)

54e555a

benpicco added this to the Release 2021.10 milestone Oct 20, 2021

cpu/nrf9160: add twi and spi support #16814

cpu/nrf9160: add twi and spi support #16814

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dylad commented Sep 5, 2021

Contribution description

Testing procedure

Issues/PRs references

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