913: (embassy-rp): Add DMA implementation r=Dirbaio a=MathiasKoch
This PR adds everything necessary to do peripheral to memory DMA & memory to memory DMA operations.
It also adds async UART read & write, powered by DMA
Co-authored-by: Mathias <mk@blackbird.online>
Ensures that nRF saadc sampling is stopped and is awaited prior to exiting the two sampling methods. Not doing so causes a potential power drain and the potential for dropped buffer writes when having finished continuous sampling.
This commit adds two constants which are intended to be used for setting
the `Word Length` and `High Speed` fields in the gSPR register
(address: 0x0000, bit: 0 and bit 4).
Currently, this field is being set by the following line:
```rust
// 32bit, little endian.
self.write32_swapped(REG_BUS_CTRL, 0x00010031).await;
```
Assuming that we are sending these bits using the gSPI write protocol
and using 16-bit word operation in little endian (which I think might
be the default) then the data bytes should be packed like this:
```
+--+--+--+--+
|D1|D0|D3|D2|
+--+--+--+--+
val (hex): 0x00010031
val (bin): 00000000000000010000000000110001
rotated(16): 00000000001100010000000000000001
```
If we split val into bytes and rotated the bits we get:
```
Split into bytes:
D3 D2 D1 D0
00000000 00000001 00000000 00110001
Rotate 16 and split into bytes:
D1 D0 D3 D2
00000000 00110001 00000000 00000001
```
Looking at the write procotol it seems to me that the above will
indeed set the `Word Length` to 1 but will also set other values.
```
Status enable (1=default)
D1 D0 D3 D2 ↓
00000000 00110001 00000000 00000001
↑↑ ↑↑ ↑
|| |Word Length (1=32-bit)
|| |
|| Endianess (0=Little)
||
|High-speed mode (1=High speed (default))
|
Interrupt polarity (1=high (default))
```
This commit suggests adding the above mentioned constants for setting
the only the word length field and the high speed field.
924: Ensure interrupt::take works without embassy-executor r=lulf a=lulf
Add "rtos-trace-interrupt" feature flag on embassy-macros and enable it
for embassy-executor, to ensure that the interrupt::take! macro can be
used without depending on embassy-executor.
Co-authored-by: Ulf Lilleengen <lulf@redhat.com>
Add "rtos-trace-interrupt" feature flag on embassy-macros and enable it
for embassy-executor, to ensure that the interrupt::take! macro can be
used without depending on embassy-executor.
This commit renames the REG_BUS_FEEDBEAD to REG_BUS_TEST_RO
(Read-Only) which is the name used in the specification, section 4.2.3
Table 6.
It also adds a constant named REG_BUS_TEST_RW (Read-Write) to represent
the dummy register which the host can use to write data and read back
to check that the gSPI interface is working properly.
926: nrf: PPI fixes r=Dirbaio a=Dirbaio
- Feature-gate DPPI-only stuff that should be feature-gated
- Fix unsoundness due to Task/Event ptr being public: this meant you could construct a Task/Event with an arbitrary pointer and then safely call `Ppi::new_*` which would blindly write to it. Now you have to go through `Task/Event::new_unchecked` which is unsafe, with the right safety contract.
Co-authored-by: Dario Nieuwenhuis <dirbaio@dirbaio.net>
925: Enable 'std' feature on critical-section for WASM r=Dirbaio a=lulf
This fixes the WASM support which was failing due to missing
critical-section implementation. This also upgrades the bindgen
dependency and ensures that tooling works.
Co-authored-by: Ulf Lilleengen <lulf@redhat.com>
This fixes the WASM support which was failing due to missing
critical-section implementation. This also upgrades the bindgen
dependency and ensures that tooling works.
918: Doc warnings r=Dirbaio a=lulf
Fixing a few doc warnings in embassy-executor, embassy-time, embassy-usb and embassy-nrf. There are more left, but I need a break :D
Co-authored-by: Ulf Lilleengen <lulf@redhat.com>
897: Add support for `rtos-trace` behind a feature flag r=lulf a=quentinmit
This allows SystemView to be used to profile the behavior of the user's application.
Co-authored-by: Quentin Smith <quentin@mit.edu>
This commit add comments about what CLM stands for.
The motivation of this is that I think it helps understanding the code
for users who are new to the codebase (like me).
