To simplify the playlist handling, enforce that the indices are always
formatted to the same length (5, which allows for 100000 entries, that
should be enough).
Then make the position stored in the Playlist object be a simple integer
instead of a database key. This simplifies the code, and will make
implementing shuffle much easier.
Signed-off-by: Matthias Blankertz <matthias@blankertz.org>
Add documentation of playlist database schema in DEVELOP.md.
Add settings for persist and shuffle to BTreeDB. Implement the different
persist modes. Shuffle will be implemented in a followup commit.
Signed-off-by: Matthias Blankertz <matthias@blankertz.org>
Apply the same pattern as in 6f155ebb55 ("audiocore: Fix small race
window in get_fifo_read_value_blocking") and 2a4033d3ca ("rp2_sd: Fix
race window in sd_spi_wait_complete") to the wait for interrupt in
i2s_stop too.
Signed-off-by: Matthias Blankertz <matthias@blankertz.org>
Similar to the fix in 6f155ebb55 ("audiocore: Fix small race window in
get_fifo_read_value_blocking"), a race and deadlock is possible when
calling __wfi with interrupts enabled. Fix it in sd_spi_wait_complete by
copying the fix from the above commit.
Signed-off-by: Matthias Blankertz <matthias@blankertz.org>
Add a read test to the SD tests in standalone_mp3, and also apply the
drive strength setup and higher clockrate from board_Rev1.py.
Signed-off-by: Matthias Blankertz <matthias@blankertz.org>
The PIO has an internal synchronizer on each GPIO input which adds two
cycles of delay. This prevents metastabilities in the PIO logic (see
RP2040 datasheet p. 374f). For high speed synchronous interfaces such as
SPI this needs to be disabled to reduce input delay.
Signed-off-by: Matthias Blankertz <matthias@blankertz.org>
The code snippet in hwconfig to adjust the drive strength was incorrect:
It was adjusting the wrong pins. This was probably not updated during
some pin shuffling in the breadboard phase.
Fix this by adjusting the correct pins. Experimentation shows that both
setting the slew rate to fast or setting the drive strength to 8 mA
(default: slow and 4 mA) is sufficient to make SD SPI work at 25 MHz on
the Rev1 PCB. For now, the combination 8 mA and slow is chosen (slow
slew rate should result in less high frequency EMI).
Also make the SD clock rate adjustable in hwconfig, and set it to 25 MHz
for Rev1 and 15 MHz for the breadboard setup.
Signed-off-by: Matthias Blankertz <matthias@blankertz.org>
In order to turn the Tonberry device on more reliably even if the power
button is only pressed for a short time, move the setting of POWER_EN
pin to high from the python board_init to the MICROPY_BOARD_STARTUP
macro so that is is started in the C startup code run before the
micropython interpreter is initialized.
Measured time from power on to POWER_EN time was 600-800 ms with the
python board_init, vs. 155 ms for the MICROPY_BOARD_STARTUP.
Signed-off-by: Matthias Blankertz <matthias@blankertz.org>
- Increase the formatting of playlist entries to allow up to 100000
tracks. Also enforce that playlist entries are indexed by integers
using the validate method.
- Add a validate method to validate the data stored in the
btreedb. Optionally dump the contents to stdout. For testing, add a
validate+dump by default when opening the db. This can be removed once
the playlistdb is validated.
Add playlist database based on the micropython 'btree' module.
Supported features are:
* Create playlist
* Load playlist
* Store position in playlist
Different playlist modes will be added in a followup for #24.
Implements #23.
The playlist data is stored in the btree database in a hierarchical
schema. The hierarchy levels are separated by the '/' character.
Currently, the schema is as follows: The top level for a playlist is the
'tag' id encoded as a hexadecimal string. Beneath this, the 'playlist'
key contains the elements in the playlist. The exact keys used for the
playlist entries are not specified, they are enumerated in native sort
order to build the playlist. When writing a playlist using the
playlistdb module, the keys are 000, 001, etc. by default. The
'playlistpos' key is also located under the 'tag' key and stores the key
of the current playlist entry.
For example, a playlist with two entries 'a.mp3' and 'b.mp3' for a tag
with the id '00aa11bb22' would be stored in the following key/value
pairs in the btree db:
- 00aa11bb22/playlist/000: a.mp3
- 00aa11bb22/playlist/001: b.mp3
- 00aa11bb22/playlistpos: 000
Signed-off-by: Matthias Blankertz <matthias@blankertz.org>
Spurious failures were observed with a SanDisk Ultra 32GB card that no
longer occur with the increased timeouts.
Signed-off-by: Matthias Blankertz <matthias@blankertz.org>
The check-format and clang-format targets were not adjusted when the
code was reorganized in commit 7f8282315e ("Restructure sources"). Fix
it to find the C sources that are now in the modules directory.
Signed-off-by: Matthias Blankertz <matthias@blankertz.org>
Move hardware-specifics (pin assignments, power management) to
hwconfig_*.py.
The build system will build a firmware image
firmware-filesystem-$variant.uf2 for all variants for which a
hwconfig_$variant.py file exits. Inside the filesystem image, the
selected variants hwconfig_$variant.py file will always be named
hwconfig.py.
At runtime, main.py will attempt to import hwconfig which will load the
configuration for the correct variant.
Currently, the hwconfig_* modules are expected to define the pin mapping
and implement a board_init method.
Signed-off-by: Matthias Blankertz <matthias@blankertz.org>
- Old SDSC cards could have a native blocksize != 512 bytes, but they
should support the SET_BLOCKLEN command to set the blocksize to 512.
Use that so we can just assume 512 everywhere else.
- SDSC cards used byte addresses, not sector numbers, for the argument
of READ_BLOCK and WRITE_BLOCK. Check the card type and multiply the
sector number with 512 if necessary.
Tested with a noname chinese 128 MiB-ish card.
Signed-off-by: Matthias Blankertz <matthias@blankertz.org>
Clean up schematic and put battery power, buttons and run/reset in
subblocks.
Add missing switch on RUN to reset the RP2040. In the PCB this is
actually a jumper instead of a switch right now, so it fits in the
existing layout.
Signed-off-by: Matthias Blankertz <matthias@blankertz.org>
Make mypy run with proper type stubs for micropython RP2.
Add basic structure for pytest testing.
Signed-off-by: Matthias Blankertz <matthias@blankertz.org>
Migrated all patches from the previous version.
A change in the Findpicotool.cmake script in the pico-sdk led to a
downgrade of picotool, which incorporated mbedtls into the build, which
itself is not buildable with cmake versions < 3.5.
The commit which made this isolated change was reverted. Future versions
of micropython will use pico-sdk 2.2.0 or newer, where this problem is
fixed, and picotool is pinned to a release version.
In theory, the FIFO interrupt could occur after getting the
fifo_read_value and reenabling interrupts, but before __wfi is called,
causing a deadlock. Fix this by calling __wfi with interrupts still
disabled. It will return immediately if an interrupt is pending.
Add two __nop to ensure that the CPU has enough instructions between
enabling interrupts and disabling them again at the top of the loop.
Signed-off-by: Matthias Blankertz <matthias@blankertz.org>
Add utils.MBRPartition to implement basic partitioned device support.
Try to mount partition 1 of SDCard first, if that fails, try to mount
entire device as FAT file system.
Signed-off-by: Matthias Blankertz <matthias@blankertz.org>
