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Author SHA1 Message Date
669ecb1620 Étoffe le README avec les choix et raisonnements 2023-06-25 18:06:39 +01:00
2ed9efa7e0 Rev 0.3: Passage sur deux couches
Passage sur deux couches, ajustement de l'impédance pour l'USB.
Reroutage de l'alimentation côté USB
Ajout de beaucoup de silk
Quelques ajustements de nets pour la lisbilité
Ajout de LEDs de debug
Plan de masse sur le top
Quelques mises à jour sur le schematic
2023-06-25 17:12:30 +01:00
08f5348db1 License under CERN-OHL-W 2023-06-25 12:08:26 +01:00
10 changed files with 15413 additions and 15374 deletions

View file

@ -6,8 +6,8 @@
(title_block
(title "Projet Barbapapa")
(date "2023-06-22")
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View file

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(date "2023-06-22")
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287
LICENSE Normal file
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@ -0,0 +1,287 @@
CERN Open Hardware Licence Version 2 - Weakly Reciprocal
Preamble
CERN has developed this licence to promote collaboration among hardware
designers and to provide a legal tool which supports the freedom to use,
study, modify, share and distribute hardware designs and products based on
those designs. Version 2 of the CERN Open Hardware Licence comes in three
variants: CERN-OHL-P (permissive); and two reciprocal licences: this licence,
CERN-OHL-W (weakly reciprocal) and CERN-OHL-S (strongly reciprocal).
The CERN-OHL-W is copyright CERN 2020. Anyone is welcome to use it, in
unmodified form only.
Use of this Licence does not imply any endorsement by CERN of any Licensor or
their designs nor does it imply any involvement by CERN in their development.
1 Definitions
1.1 'Licence' means this CERN-OHL-W.
1.2 'Compatible Licence' means
a) any earlier version of the CERN Open Hardware licence, or
b) any version of the CERN-OHL-S or the CERN-OHL-W, or
c) any licence which permits You to treat the Source to which it
applies as licensed under CERN-OHL-S or CERN-OHL-W provided that on
Conveyance of any such Source, or any associated Product You treat
the Source in question as being licensed under CERN-OHL-S or
CERN-OHL-W as appropriate.
1.3 'Source' means information such as design materials or digital code
which can be applied to Make or test a Product or to prepare a Product
for use, Conveyance or sale, regardless of its medium or how it is
expressed. It may include Notices.
1.4 'Covered Source' means Source that is explicitly made available under
this Licence.
1.5 'Product' means any device, component, work or physical object, whether
in finished or intermediate form, arising from the use, application or
processing of Covered Source.
1.6 'Make' means to create or configure something, whether by manufacture,
assembly, compiling, loading or applying Covered Source or another
Product or otherwise.
1.7 'Available Component' means any part, sub-assembly, library or code
which:
a) is licensed to You as Complete Source under a Compatible Licence; or
b) is available, at the time a Product or the Source containing it is
first Conveyed, to You and any other prospective licensees
i) with sufficient rights and information (including any
configuration and programming files and information about its
characteristics and interfaces) to enable it either to be Made
itself, or to be sourced and used to Make the Product; or
ii) as part of the normal distribution of a tool used to design or
Make the Product.
1.8 'External Material' means anything (including Source) which:
a) is only combined with Covered Source in such a way that it
interfaces with the Covered Source using a documented interface
which is described in the Covered Source; and
b) is not a derivative of or contains Covered Source, or, if it is, it
is solely to the extent necessary to facilitate such interfacing.
1.9 'Complete Source' means the set of all Source necessary to Make a
Product, in the preferred form for making modifications, including
necessary installation and interfacing information both for the Product,
and for any included Available Components. If the format is
proprietary, it must also be made available in a format (if the
proprietary tool can create it) which is viewable with a tool available
to potential licensees and licensed under a licence approved by the Free
Software Foundation or the Open Source Initiative. Complete Source need
not include the Source of any Available Component, provided that You
include in the Complete Source sufficient information to enable a
recipient to Make or source and use the Available Component to Make the
Product.
1.10 'Source Location' means a location where a Licensor has placed Covered
Source, and which that Licensor reasonably believes will remain easily
accessible for at least three years for anyone to obtain a digital copy.
1.11 'Notice' means copyright, acknowledgement and trademark notices, Source
Location references, modification notices (subsection 3.3(b)) and all
notices that refer to this Licence and to the disclaimer of warranties
that are included in the Covered Source.
1.12 'Licensee' or 'You' means any person exercising rights under this
Licence.
1.13 'Licensor' means a natural or legal person who creates or modifies
Covered Source. A person may be a Licensee and a Licensor at the same
time.
1.14 'Convey' means to communicate to the public or distribute.
2 Applicability
2.1 This Licence governs the use, copying, modification, Conveying of
Covered Source and Products, and the Making of Products. By exercising
any right granted under this Licence, You irrevocably accept these terms
and conditions.
2.2 This Licence is granted by the Licensor directly to You, and shall apply
worldwide and without limitation in time.
2.3 You shall not attempt to restrict by contract or otherwise the rights
granted under this Licence to other Licensees.
2.4 This Licence is not intended to restrict fair use, fair dealing, or any
other similar right.
3 Copying, Modifying and Conveying Covered Source
3.1 You may copy and Convey verbatim copies of Covered Source, in any
medium, provided You retain all Notices.
3.2 You may modify Covered Source, other than Notices, provided that You
irrevocably undertake to make that modified Covered Source available
from a Source Location should You Convey a Product in circumstances
where the recipient does not otherwise receive a copy of the modified
Covered Source. In each case subsection 3.3 shall apply.
You may only delete Notices if they are no longer applicable to the
corresponding Covered Source as modified by You and You may add
additional Notices applicable to Your modifications.
3.3 You may Convey modified Covered Source (with the effect that You shall
also become a Licensor) provided that You:
a) retain Notices as required in subsection 3.2;
b) add a Notice to the modified Covered Source stating that You have
modified it, with the date and brief description of how You have
modified it;
c) add a Source Location Notice for the modified Covered Source if You
Convey in circumstances where the recipient does not otherwise
receive a copy of the modified Covered Source; and
d) license the modified Covered Source under the terms and conditions
of this Licence (or, as set out in subsection 8.3, a later version,
if permitted by the licence of the original Covered Source). Such
modified Covered Source must be licensed as a whole, but excluding
Available Components contained in it or External Material to which
it is interfaced, which remain licensed under their own applicable
licences.
4 Making and Conveying Products
4.1 You may Make Products, and/or Convey them, provided that You either
provide each recipient with a copy of the Complete Source or ensure that
each recipient is notified of the Source Location of the Complete
Source. That Complete Source includes Covered Source and You must
accordingly satisfy Your obligations set out in subsection 3.3. If
specified in a Notice, the Product must visibly and securely display the
Source Location on it or its packaging or documentation in the manner
specified in that Notice.
4.2 Where You Convey a Product which incorporates External Material, the
Complete Source for that Product which You are required to provide under
subsection 4.1 need not include any Source for the External Material.
4.3 You may license Products under terms of Your choice, provided that such
terms do not restrict or attempt to restrict any recipients' rights
under this Licence to the Covered Source.
5 Research and Development
You may Convey Covered Source, modified Covered Source or Products to a legal
entity carrying out development, testing or quality assurance work on Your
behalf provided that the work is performed on terms which prevent the entity
from both using the Source or Products for its own internal purposes and
Conveying the Source or Products or any modifications to them to any person
other than You. Any modifications made by the entity shall be deemed to be
made by You pursuant to subsection 3.2.
6 DISCLAIMER AND LIABILITY
6.1 DISCLAIMER OF WARRANTY -- The Covered Source and any Products are
provided 'as is' and any express or implied warranties, including, but
not limited to, implied warranties of merchantability, of satisfactory
quality, non-infringement of third party rights, and fitness for a
particular purpose or use are disclaimed in respect of any Source or
Product to the maximum extent permitted by law. The Licensor makes no
representation that any Source or Product does not or will not infringe
any patent, copyright, trade secret or other proprietary right. The
entire risk as to the use, quality, and performance of any Source or
Product shall be with You and not the Licensor. This disclaimer of
warranty is an essential part of this Licence and a condition for the
grant of any rights granted under this Licence.
6.2 EXCLUSION AND LIMITATION OF LIABILITY -- The Licensor shall, to the
maximum extent permitted by law, have no liability for direct, indirect,
special, incidental, consequential, exemplary, punitive or other damages
of any character including, without limitation, procurement of
substitute goods or services, loss of use, data or profits, or business
interruption, however caused and on any theory of contract, warranty,
tort (including negligence), product liability or otherwise, arising in
any way in relation to the Covered Source, modified Covered Source
and/or the Making or Conveyance of a Product, even if advised of the
possibility of such damages, and You shall hold the Licensor(s) free and
harmless from any liability, costs, damages, fees and expenses,
including claims by third parties, in relation to such use.
7 Patents
7.1 Subject to the terms and conditions of this Licence, each Licensor
hereby grants to You a perpetual, worldwide, non-exclusive, no-charge,
royalty-free, irrevocable (except as stated in subsections 7.2 and 8.4)
patent licence to Make, have Made, use, offer to sell, sell, import, and
otherwise transfer the Covered Source and Products, where such licence
applies only to those patent claims licensable by such Licensor that are
necessarily infringed by exercising rights under the Covered Source as
Conveyed by that Licensor.
7.2 If You institute patent litigation against any entity (including a
cross-claim or counterclaim in a lawsuit) alleging that the Covered
Source or a Product constitutes direct or contributory patent
infringement, or You seek any declaration that a patent licensed to You
under this Licence is invalid or unenforceable then any rights granted
to You under this Licence shall terminate as of the date such process is
initiated.
8 General
8.1 If any provisions of this Licence are or subsequently become invalid or
unenforceable for any reason, the remaining provisions shall remain
effective.
8.2 You shall not use any of the name (including acronyms and
abbreviations), image, or logo by which the Licensor or CERN is known,
except where needed to comply with section 3, or where the use is
otherwise allowed by law. Any such permitted use shall be factual and
shall not be made so as to suggest any kind of endorsement or
implication of involvement by the Licensor or its personnel.
8.3 CERN may publish updated versions and variants of this Licence which it
considers to be in the spirit of this version, but may differ in detail
to address new problems or concerns. New versions will be published with
a unique version number and a variant identifier specifying the variant.
If the Licensor has specified that a given variant applies to the
Covered Source without specifying a version, You may treat that Covered
Source as being released under any version of the CERN-OHL with that
variant. If no variant is specified, the Covered Source shall be treated
as being released under CERN-OHL-S. The Licensor may also specify that
the Covered Source is subject to a specific version of the CERN-OHL or
any later version in which case You may apply this or any later version
of CERN-OHL with the same variant identifier published by CERN.
You may treat Covered Source licensed under CERN-OHL-W as licensed under
CERN-OHL-S if and only if all Available Components referenced in the
Covered Source comply with the corresponding definition of Available
Component for CERN-OHL-S.
8.4 This Licence shall terminate with immediate effect if You fail to comply
with any of its terms and conditions.
8.5 However, if You cease all breaches of this Licence, then Your Licence
from any Licensor is reinstated unless such Licensor has terminated this
Licence by giving You, while You remain in breach, a notice specifying
the breach and requiring You to cure it within 30 days, and You have
failed to come into compliance in all material respects by the end of
the 30 day period. Should You repeat the breach after receipt of a cure
notice and subsequent reinstatement, this Licence will terminate
immediately and permanently. Section 6 shall continue to apply after any
termination.
8.6 This Licence shall not be enforceable except by a Licensor acting as
such, and third party beneficiary rights are specifically excluded.

View file

@ -6,8 +6,8 @@
(title_block
(title "Projet Barbapapa")
(date "2023-06-22")
(rev "0.2")
(date "2023-06-25")
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View file

@ -6,8 +6,8 @@
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View file

@ -1,6 +1,25 @@
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"zz": 0.642692506313324
},
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"drill": 0.762,
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"silk_text_italic": false,
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}
],
"drc_exclusions": [
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},
{
"netclass": "Power",
"pattern": "VDD"
}
]
},

View file

@ -6,8 +6,8 @@
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@ -42,6 +42,42 @@
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View file

@ -14,11 +14,94 @@ d'un écran LCD, de LEDs RGB, ainsi que l'utilisation d'un haut-parleur.
Elle doit permettre une opération connectée à un ordinateur, comme indépendante.
# Statut
# État
La carte est en période de révision: elle n'a pas été produite ou testée.
La versionnement de forme X.Y se lit comme suit:
- X : Version mise en production (avec 1 comme première production)
- Y : Révision suivant la mise en production (remis à 0 quand X augmente)
# Choix
*À compléter*
## Fabricant
La carte a été conçue pour être fabriquée par JLCPCB en double couche avec une carte de 0.8mm d'épaisseur. Les marges
du design ont donc été pensées pour leurs capacités de fabrication.
Le choix du 0.8mm est essentiellement pour faciliter l'atteinte de la bonne impédance pour les pistes D+ et D- de l'USB.
JLCPCB a aussi le gros avantage d'être très bon marché, en passant en double couche les PCBs devraient coûter à peine
quelques livres.
## Carte microcontrôleur
La teensy 4.1 a été choisie pour la flexibilité de ses interfaces et des bibliothèques disponnibles.
La carte elle-même est bien trop puissante pour l'application, qui ne nécessite pas la capacité de calcul d'un Cortex-M7,
mais cela réduira les contraintes lors du développement du firmware pour faire tourner les différents éléments.
En particulier, les bibliothèques audio de la teensy sont assez réputées et ont servies pour faire différentes pédales
d'effet, et la présence d'un port microSD déjà intégré sur la carte rend le stockage des animations pour le LCD et des
fichiers audios bien plus simple.
## Alimentation
Une des contraintes de conception était la possibiltié d'utiliser l'objet de façon indépendante d'un ordinateur. Il a donc
fallut intégrer une batterie capable de tenir la charge du système.
L'élément le plus consommateur ici est l'amplificateur audio. Bien que la majeure partie du temps il ne consomme presque rien,
les pics de courant demandés lors du jeu audio ont poussé au choix d'une batterie Li-Ion et d'un régulateur pouvant soutenir
2A de courant continu.
Les batteries Li-Ion ont l'avantage monter à 4.2V à pleine charge, il est donc possible de les charger par USB. Cela évite
l'utilisation de piles non-rechargeables, que je voulais éviter. Elles permettent aussi de débiter un courant suffisant pour
alimenter tout le système, ce qui est rarement le cas des piles jetables de toutes façons.
Le système est donc alimenté par la batterie, parfois complémenté par le chargeur qui fournit jusqu'à 500mA pour la charger.
Seule la Teensy est alimentée directement par la batterie, tout le reste du système est derrière le régulateur 3.3V (tension
logique de la Teensy).
L'alimentation à la Teensy est contrôlée par un interrupteur externe branché sur `SW2`, puis cette dernière contrôle l'activation
du régulateur 3.3V. Elle peut lire la tension fournie par la batterie et décider de couper le système si nécessaire pour la
préserver.
### À noter
Le gros du système est protégé d'une inversion de polarité de la batterie Li-Ion par une diode. Cependant, le chargeur lui-même
ne l'est pas. Cette décision à été prise car l'inversion ne devrait pas être trop commune, le réceptacle étant polarisé et indiqué,
mais aussi pour la chute de tension supplémentaire que ça aurait apporté.
***Ne pas mettre la batterie à l'envers !***
## Périphériques
La carte est conçue pour la connexion d'un écran LCD de Nokia 5110 pour son style à gros pixels et d'un module NFC.
Le module NFC choisi est le RC522 pour sa capacité à gérer de multiples tags dans sa zone de détection et ainsi permettre de
poser plusieurs figurines sur la zone en même temps.
Au cas où la zone de détection s'avère trop faible ou que la connexion du module NFC et du module LCD au même bus SPI soit
problématique, deux alternatives ont été prévues sur la carte :
1. La possibilité d'utiliser du soft-SPI pour le LCD
2. La sortie d'un deuxième bus SPI indépendant pour un deuxième module NFC en parallèle
L'amplificateur a été choisi pour son entrée I2S (signal audio numérique) et son circuit d'amplification très complet et
auto-suffisant, ne nécessitant pas grand chose de plus que quelques condensateurs et résistances pour le choix de fonctionnement.
C'est un MAX98357A, il existe aussi sous forme de module entre autre par Sparkfun comme "I2S Audio Breakout".
Deux autres séries de broches sont présentes : une pour brancher un câble FTDI et avoir accès à la série de la Teensy directement
(seules les broches TX/RX et la masse sont connectées) et un trois broches pour contrôler des LEDs RGB addressables style neopixel.
# License
Les éléments présents dans ce dépôt sont Open Source Hardware, sous license [CERN Open Hardware Licence Version 2 - Weakly Reciprocal](https://ohwr.org/cern_ohl_w_v2.txt).
# Crédits
Carte conçue par Téo-CD, avec les conseiles de Victor Védie, François Charles, Lucas Molia.