This fixes compilation issues in `tests/pkg/tinyusb_netdev` with
newer versions of the RISC-V toolchain due to two competing USB
stacks being pulled in. With the older toolchain the build system
warns:
The following features may conflict: periph_usbdev tinyusb_device
But builds fine (even though surprises at runtime are likely). The
newer toolchain takes an issue with the same symbol being linked
in more than once (and more than one instance not being `weak`).
Adds a separate board for native64 instead of the `NATIVE_64BIT` workaround.
The files in `boards/native64` are more or less dummy files and just include
the `boards/native` logic (similar to `openlabs-kw41z-mini-256kib`).
The main logic for native is in `makefiles/arch/native.inc.mk`, `cpu/native`
and `boards/native`.
The remaining changes concern the build system, and change native board checks
to native CPU checks to cover both boards.
Initial version to test 64 bit compatibility.
Instead of a separate board, the inital version for Linux/x86_64 is enabled
by setting the environment variable `NATIVE_64BIT=y` and compiling as usual.
Not currently implemented:
* Architectures other than x86_64 or operating systems other than Linux
* No FreeBSD support
* No Aarch support
* Rust support for x86_64
- Move common code for USART (shared SPI / UART peripheral) to its
own file and allow sharing the USART peripheral to provide both
UART and SPI in round-robin fashion.
- Configure both UART and SPI bus via a `struct` in the board's
`periph_conf.h`
- this allows allocating the two UARTs as needed by the use case
- since both USARTs signals have a fixed connection to a single
GPIO, most configuration is moved to the CPU
- the board now only needs to decide which bus is provided by
which USART
Note: Sharing an USART used as UART requires cooperation from the app:
- If the UART is used in TX-only mode (no RX callback), the driver
will release the USART while not sending
- If the UART is used to also receive, the application needs to power
the UART down while not expecting something to send. An
`spi_acquire()` will be blocked while the UART is powered up.
C has this feature that the order of struct members in the
initialization doesn't need to match the order in the declaration.
C++ has not yet caught up:
boards/common/gd32v/include/cfg_usbdev_default.h:50:1: error: designator order for field 'dwc2_usb_otg_fshs_config_t::type' does not match declaration order in 'const dwc2_usb_otg_fshs_config_t'
So, just reorder the fields for now by hand.
Revision 10199-V1.0 of the board has an incorrect pin labeling on the
silkscreen, presumably because the board was initially developed
for a different E180 module and the silkscreen was not updated when
populated with a different E180 module.
It is very likely that if newer revisions of the test board get
produced, they will use the same very systematical routing as revision
1.0 and only the silkscreen labeling will be fixed. Hence, documenting
the correct pin mapping will be useful even for newer revisions.
