boards/feather-m0: initial support #7510

aabadie · 2017-08-24T13:19:32Z

Add support for Adafruit Feather M0 board. This board is the base boards used for:

Those boards are all the same, except that they have a different module soldered on them. All extra modules are connected to the same SPI (SPIDEV(0)). So the idea will be to add a <driver>_params.h in boards/feather-m0 when one is available (for example, RIOT doesn't support ATWINC1500 for the moment).

They are very similar to the Arduino MKR boards: same MCU (samd21g18a), can be flashed using bossa (since it uses the same bootloader preinstalled), same ldscript.

Only on-board LED, UART, 2 PWM, 6 ADC, 1 SPI, 1 I2C, RTC are configured.

aabadie · 2017-08-28T15:18:44Z

Updated this PR to work with all Adafruit Feather M0 boards: they are all built on the same base (same pinout) with different modules.

lebrush · 2017-08-31T09:58:55Z

I've too few experience with SAM processors to see if there's something weird... The only thing I could notice is that you'll have to run uncrustify on boards/feather-m0/include/periph_conf.h :-) .

One question: why can't the STDIO be accessed directly on the USB?

aabadie · 2017-08-31T11:36:40Z

why can't the STDIO be accessed directly on the USB?

Because there's no FDTI. The USB port is connected directly to the MCU, and that would required a software UART built on top of the USB. AFAIK, RIOT doesn't provide a USB stack (yet). Correct me if I'm wrong.

lebrush · 2017-08-31T12:52:42Z

The official page in the Adafruit website and states "This chip comes with built in USB so it has USB-to-Serial program & debug capability built in with no need for an FTDI-like chip" but I just checked how is this handled by the Arduino library and they implemented this part of the USB stack. So I guess that it's Ok like this :-)

aabadie · 2017-08-31T16:35:19Z

Not sure about the uncrustify issue but I pushed an update. Let me know if it's better for you now.

lebrush

They are just cosmetic thingys, sorry

lebrush · 2017-09-01T08:22:52Z

boards/feather-m0/include/periph_conf.h

+    {
+        .dev    = &SERCOM0->USART,
+        .rx_pin = GPIO_PIN(PA,11), /* RX pin */
+        .tx_pin = GPIO_PIN(PA,10), /* TX pin */


it' seems that uncrustify didn't get what I meant... sorry I thought it would: missing space between PA and number.

lebrush · 2017-09-01T08:23:17Z

boards/feather-m0/include/periph_conf.h

+    {TCC0, {
+        /* GPIO pin, MUX value, TCC channel */
+        { GPIO_UNDEF, (gpio_mux_t)0,  0 },
+        { GPIO_PIN(PA, 7), GPIO_MUX_E,  1 }, /* ~9 */


too many spaces before last parameter (also in pwm1)

lebrush · 2017-09-01T08:23:57Z

boards/feather-m0/include/periph_conf.h

+
+static const adc_conf_chan_t adc_channels[] = {
+    /* port, pin, muxpos */
+    {GPIO_PIN(PA, 2), ADC_INPUTCTRL_MUXPOS_PIN0},     /* A0 */


no spaces after and before curly braces

lebrush · 2017-09-01T08:24:25Z

boards/feather-m0/include/periph_conf.h

+ * @name    I2C configuration
+ * @{
+ */
+#define I2C_NUMOF          (1U)


space missing before (

aabadie · 2017-09-01T13:13:12Z

@lebrush, I addressed your comments

lebrush

Untested ACK

smlng · 2017-09-26T08:35:18Z

boards/feather-m0/include/board.h

+ *
+ * ### General information
+ *
+ * Feather M0 boards are development boards shipped by


nice detailed infos on that board, I'd rather put that into a separate doc.txt in the root directory of the board.

That's a good idea.
Maybe one day, it could be used to auto-generate (by replacing some keyword) the list for provided features (i2c, gpio, etc) for this board, when generating the doxygen documentation.

smlng · 2017-09-26T08:36:04Z

boards/feather-m0/include/board.h

+ */
+
+/**
+ * @defgroup    boards_adafruit-feather-m0 Adafruit Feather M0


should be boards_feather-m0 matching the path or rename the board directory

aabadie · 2017-09-27T07:40:48Z

I rebased this PR on #7646.

ynezz · 2017-09-28T12:10:50Z

boards/feather-m0/Makefile.include

+export CPU_MODEL = samd21g18a
+
+#export needed for flash rule
+export PORT_LINUX ?= /dev/ttyUSB0


@aabadie Mine is /dev/ttyACM0

@aabadie Maybe this two patches would fix this?

makefiles/tools/bossa: Introduce PORT_BOSSA variable
boards/feather-m0: Use PORT_BOSSA variable for flashing using Bossa

make -j10 BOARD=feather-m0 -C examples/hello-world flash term ... /opt/devel/mcu/RIOT/dist/tools/bossa/bossac -p /dev/ttyACM0 -e -i -w -v -b -R /opt/devel/mcu/RIOT/examples/hello-world/bin/feather-m0/hello-world.bin ... Done in 0.059 seconds CPU reset. ... /opt/devel/mcu/RIOT/dist/tools/pyterm/pyterm -p "/dev/ttyUSB0" -b "115200" 2017-09-28 15:21:58,683 - INFO # Connect to serial port /dev/ttyUSB0 Welcome to pyterm! Type '/exit' to exit. 2017-09-28 15:21:59,688 - INFO # main(): This is RIOT! (Version: 2017.10-devel-509-g52f9b-ntbk-feather-m0-testing)

Yes, I was thinking of something similar. Thanks, I'll update the PR asap

basilfx · 2017-11-05T19:34:46Z

boards/feather-m0/Makefile.features

@@ -0,0 +1,14 @@
+# Put defined MCU peripherals here (in alphabetical order)
+FEATURES_PROVIDED += periph_adc
+FEATURES_PROVIDED += periph_cpuid


Is now already in sam0_common/Makefile.features (see #7880)

basilfx · 2017-11-05T19:39:51Z

I have the Feather M0, and tested it. Works like a charm after I figured how to flash it.

Also tested the rebased version, and it works. #7880 should be applied though.

basilfx · 2017-11-05T20:37:07Z

boards/feather-m0/Makefile.features

+FEATURES_PROVIDED += periph_uart
+
+# The board MPU family (used for grouping by the CI system)
+FEATURES_MCU_GROUP = cortex_m0_2


Almost:

Last line should be: -include $(RIOTCPU)/samd21/Makefile.features (see other boards, e.g. arduino-zero).

Indeed, thanks for spotting this :)

basilfx · 2017-11-05T20:40:56Z

ACK when Murdock is green.

aabadie · 2017-11-05T20:48:46Z

The CI is broken because of a doxygen warning... I prepended a9f499c in order to fix this (it works locally on my machine)

basilfx · 2017-11-05T20:56:37Z

Wouldn't it be better to have a9f499c in a separate PR?

aabadie · 2017-11-05T21:14:04Z

Wouldn't it be better to have a9f499c in a separate PR?

Yes, that's also what I think. We'll have to wait a bit more before we can merge this one.

aabadie · 2017-11-05T21:18:46Z

Regarding the doxygen fix, I created #7939. Will remove the commit from this PR (and Murdock should fail)

basilfx · 2017-11-06T06:23:51Z

#7939 is merged, so this can be merged as soon as Murdock is green.

aabadie · 2017-11-06T08:40:15Z

@ynezz, now that this one is merged, you can propose a PR with your changes regarding the bootloader shell command.

aabadie added Platform: ARM Platform: This PR/issue effects ARM-based platforms Type: new feature The issue requests / The PR implemements a new feature for RIOT labels Aug 24, 2017

aabadie added this to the Release 2017.10 milestone Aug 24, 2017

aabadie assigned astralien3000 Aug 24, 2017

aabadie force-pushed the adafruit_feather branch from b91dcc1 to 8fa7f78 Compare August 28, 2017 15:03

aabadie changed the title ~~boards/feather-m0-wifi: initial support (without atwinc1500)~~ boards/feather-m0: initial support Aug 28, 2017

aabadie added the CI: ready for build If set, CI server will compile all applications for all available boards for the labeled PR label Aug 28, 2017

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lebrush reviewed Sep 1, 2017

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This was referenced Sep 26, 2017

cpu/sam0-common: rename mkr ldscript to more a generic name #7646

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Build arduino bootloader compatible application #7645

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aabadie added the Area: boards Area: Board ports label Oct 13, 2017

aabadie mentioned this pull request Oct 14, 2017

boards/sodaq-explorer: add configuration for rn2483 module #7733

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aabadie mentioned this pull request Oct 27, 2017

readme: bump supported boards count #7885

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aabadie mentioned this pull request Nov 5, 2017

doc: increase GRAPH_MAX_NODES to avoid doxygen warning #7939

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aabadie added 2 commits November 5, 2017 22:19

boards/feather-m0: initial support

337e9d8

tests: exclude feather-m0 board from unittests

d011fd1

aabadie force-pushed the adafruit_feather branch from 8838575 to d011fd1 Compare November 5, 2017 21:19

miri64 added CI: ready for build If set, CI server will compile all applications for all available boards for the labeled PR and removed CI: ready for build If set, CI server will compile all applications for all available boards for the labeled PR labels Nov 6, 2017

miri64 merged commit ce0a82f into RIOT-OS:master Nov 6, 2017

aabadie mentioned this pull request Sep 26, 2019

boards/arduino-mkr: feather-m0: sodaq-*: provide stdio over USB and setup automatic flash with bossa #12304

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crasbe mentioned this pull request May 24, 2025

boards/feather-m0: Correct ADC Settings #21508

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boards/feather-m0: initial support #7510

boards/feather-m0: initial support #7510

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