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boards/saml21-xpro: update board documentation

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Signed-off-by: Dylan Laduranty <dylan.laduranty@mesotic.com>
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Dylan Laduranty 2024-04-23 15:18:50 +02:00
parent 2dcc97307f
commit b97167210a
1 changed files with 15 additions and 35 deletions
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50
boards/saml21-xpro/doc.txt
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@ -55,18 +55,19 @@ indiscriminately;
| Device | ID | Supported | Comments |
|:------------- |:------------- |:------------- |:------------- |
| MCU | saml21 | partly | PLL clock not implemented |
| MCU | saml21 | yes | |
| Low-level driver | GPIO | yes | |
| | PWM | no | |
| | UART | yes | |
| | PWM | yes | |
| | UART | yes | |
| | I2C | yes | |
| | SPI | yes | |
| | USB | no | |
| | USB | yes | |
| | RTT | yes | |
| | RTC | yes | |
| | RNG | no | |
| | Timer | yes | |
| | ADC | yes | |
| | RTC | yes | |
| | RNG | yes | |
| | Timer | yes | |
| | ADC | yes | |
| | DAC | yes | |
@ -74,17 +75,13 @@ indiscriminately;
Connect the device to your Micro-USB cable using the port labeled as *EDBG*.
The standard method for flashing RIOT to the saml21-xpro is using OpenOCD.
Please note that even the latest official OpenOCD (v0.9 at the time of this
writing) does not support B-variant SAML21 devices.
The standard method for flashing RIOT to the saml21-xpro is using [edbg](https://github.com/ataradov/edbg).
by calling: `make BOARD=saml21-xpro -C tests/leds flash`
If you attempt to flash a board, and OpenOCD throws a `Couldn't find part
corresponding to DID XXXXXXXX` error, you will need to compile your own OpenOCD
from source.
Note that on Linux, you will need libudev-dev package to be installed.
Refer to https://github.com/RIOT-OS/RIOT/wiki/OpenOCD for general
instructions on building OpenOCD and make sure "cmsis-dap" and "hidapi-libusb"
are enabled.
Users can also use openOCD to flash and/or debug the board using:
`PROGRAMMER=openocd make BOARD=saml21-xpro -C tests/leds flash`
On Linux you will have to add a **udev** rule for hidraw, like
```
@ -97,6 +94,7 @@ sudo service udev restart
### Arch Linux
With yaourt:
```
yaourt -S libudev0
yaourt -S hidapi-git
yaourt -S openocd-git
# edit PKGBUILD, add "cmsis-dap hidapi-libusb" to "_features"
@ -107,24 +105,6 @@ Although this refers to setting up the SAMR21, this guide is still very
helpful to understanding how to set up a solid RIOT development environment for
the SAML21: http://watr.li/samr21-dev-setup-ubuntu.html
## Supported Toolchains
For using the saml21-xpro board we strongly recommend the usage of the [GNU Tools for ARM Embedded Processors](https://launchpad.net/gcc-arm-embedded)
toolchain.
## Known Issues / Problems
### Stack sizes
The default stack sizes have not been tuned properly yet. If in doubt why
your application crashes try increasing the default stack sizes and use `ps` to
find out how much stack is being used.
Tracked in https://github.com/RIOT-OS/RIOT/issues/2228
### Not flashable by OpenOCD anymore
It can happen that OpenOCD is not able to program the board, because of wrong
clock configuration or low power modes. In this case you can use
[this little tool](https://github.com/ataradov/edbg) to erase the flash. Just follow the
instructions to build it and run `./edbg -e` to erase the flash. Then press the
reset button and you're able to program via OpenOCD again.
*/