Project Workflow Optimization
2:59
Chat History
Project
Review (ERC/DRC)
Schematic
IC1
Using Knowledge Base Tool.
Using Schematic Tool.
Using Review (ERC/DRC) Tool.
Planning tool queries.
Identifying wiring issues.
Addressing wiring and connection issues.
Reviewing wiring and connections.
Summarizing critical wiring issues.
Here’s what’s wrong (or missing) in the current wiring, based on your schematic and the live ERC/DRC results.
Top connectivity problems
- SPI between MCU and Wi‑Fi is miswired:
- IC1 PA4/SSI0RX is tied to U1 HOST_SPI_MOSI (RX should come from MISO, not MOSI).
- IC1 PA5/SSI0TX is tied to U1 FLASH_SPI_MISO (wrong bus and wrong direction; you should use U1’s HOST SPI, not FLASH SPI).
- SPI clock is unconnected: Net 1 has only IC1 PA2/SSI0CLK on it (single‑pin net).
- Chip select and IRQ are missing: U1 ~HOST_SPI_NCS and HOST_INTR have no connections to IC1.
- No power or ground networks are defined:
- None of the VDD/VSS/GND pins on IC1, U1, U2, or U3 are connected to rails or Ground symbols.
- No regulators, protection, or decoupling caps are present; net names are generic (“Net 1/2/3”) rather than explicit rails (e.g., 3V3, VMOTOR, USB_5V). The knowledge base emphasizes using clear power net names so ERC recognizes powered pins.
- I2C is not wired:
- Motor driver is completely unconnected:
- U2 VS, VSS, GND, ENA/ENB, IN1–IN4, SENSE_A/B, and OUT1–OUT4 are not tied to supplies, MCU GPIOs, or motor connectors.
- USB connector is not integrated:
- J1 VBUS, D+/D−, and GND are not connected to any rails, ESD/protection, or power-path inputs.
- No decoupling/bulk capacitors anywhere:
- Every IC lacks required local 100 nF decoupling (the knowledge base calls for a 100 nF ceramic within 5 mm per VCC/GND pair) and appropriate bulk caps per rail.
- SPI signal integrity parts are absent:
- Knowledge base recommends 22–33 Ω series resistors on high‑speed SPI lines; none are placed.
What the tools report right now
- DRC Airwires: open connections that need routing on the PCB
- ERC Single‑pin net exists (and Net 1 is visibly single‑pin at IC1:SSI0CLK). The knowledge base flags single‑pin nets and missing/undefined power rails as ERC risks.
SPI fix map (what each should connect to)
- IC1 PA5/SSI0TX (master MOSI) → U1 HOST_SPI_MOSI.
- IC1 PA4/SSI0RX (master MISO) ← U1 HOST_SPI_MISO.
- IC1 PA2/SSI0CLK → U1 HOST_SPI_CLK.
- IC1 GPIO (select one) → U1 ~HOST_SPI_NCS.
- IC1 GPIO (IRQ in) ← U1 HOST_INTR.
Immediate corrections to proceed
- Define rails and connect power/ground:
- Add explicit nets (e.g., 3V3, VMOTOR, USB_5V) and connect all VDD/VSS/GND pins using Ground symbols, per knowledge-base guidance on clear power naming.
- Add per‑IC decoupling (100 nF at each VDD pin) and bulk caps on each rail.
- Correct SPI per the “SPI fix map” above and add 22–33 Ω series resistors on CLK, MOSI, MISO (knowledge base practice).
- Wire I2C: IC1 PB2 ↔ U3 SCL, PB3 ↔ SDA, plus 4.7 kΩ pull‑ups to 3V3.
- Hook up U2 to VMOTOR and 3V3 logic, connect ENA/ENB and IN1–IN4 to MCU GPIOs, route OUT1–OUT4 to motor connectors, and connect SENSE_A/B appropriately.
- Integrate J1 into the power path and, if you intend USB data, add ESD and route D+/D−.
If you want, I can start fixing the schematic nets pin‑by‑pin. Tell me your intended power inputs (USB 5 V, battery, motor VS), and I’ll wire the rails, add decoupling and pull‑ups, and correct the SPI/I2C connections.
Correct SPI wiring
Pick WiFi SPI pins
Add I2C pullups
Define power rails
Wire PCA9685 I2C
28 days
Plan completed.
Show Plan
U3
J1
IC1
U1
Reviews
- Wirelessly connects nets on schematic. Used to organize schematics and separate functional blocks. To wirelessly connect net portals, give them same designator. #portaljharwinbarrozo43.0M
- Wirelessly connects power nets on schematic. Identical to the net portal, but with a power symbol. Used to organize schematics and separate functional blocks. To wirelessly connect power net portals, give them the same designator. #portal #powerjharwinbarrozo11.4M
- A generic fixed resistor for rapid developing circuit topology. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard resistor values: 1.0Ω 10Ω 100Ω 1.0kΩ 10kΩ 100kΩ 1.0MΩ 1.1Ω 11Ω 110Ω 1.1kΩ 11kΩ 110kΩ 1.1MΩ 1.2Ω 12Ω 120Ω 1.2kΩ 12kΩ 120kΩ 1.2MΩ 1.3Ω 13Ω 130Ω 1.3kΩ 13kΩ 130kΩ 1.3MΩ 1.5Ω 15Ω 150Ω 1.5kΩ 15kΩ 150kΩ 1.5MΩ 1.6Ω 16Ω 160Ω 1.6kΩ 16kΩ 160kΩ 1.6MΩ 1.8Ω 18Ω 180Ω 1.8KΩ 18kΩ 180kΩ 1.8MΩ 2.0Ω 20Ω 200Ω 2.0kΩ 20kΩ 200kΩ 2.0MΩ 2.2Ω 22Ω 220Ω 2.2kΩ 22kΩ 220kΩ 2.2MΩ 2.4Ω 24Ω 240Ω 2.4kΩ 24kΩ 240kΩ 2.4MΩ 2.7Ω 27Ω 270Ω 2.7kΩ 27kΩ 270kΩ 2.7MΩ 3.0Ω 30Ω 300Ω 3.0KΩ 30KΩ 300KΩ 3.0MΩ 3.3Ω 33Ω 330Ω 3.3kΩ 33kΩ 330kΩ 3.3MΩ 3.6Ω 36Ω 360Ω 3.6kΩ 36kΩ 360kΩ 3.6MΩ 3.9Ω 39Ω 390Ω 3.9kΩ 39kΩ 390kΩ 3.9MΩ 4.3Ω 43Ω 430Ω 4.3kΩ 43KΩ 430KΩ 4.3MΩ 4.7Ω 47Ω 470Ω 4.7kΩ 47kΩ 470kΩ 4.7MΩ 5.1Ω 51Ω 510Ω 5.1kΩ 51kΩ 510kΩ 5.1MΩ 5.6Ω 56Ω 560Ω 5.6kΩ 56kΩ 560kΩ 5.6MΩ 6.2Ω 62Ω 620Ω 6.2kΩ 62KΩ 620KΩ 6.2MΩ 6.8Ω 68Ω 680Ω 6.8kΩ 68kΩ 680kΩ 6.8MΩ 7.5Ω 75Ω 750Ω 7.5kΩ 75kΩ 750kΩ 7.5MΩ 8.2Ω 82Ω 820Ω 8.2kΩ 82kΩ 820kΩ 8.2MΩ 9.1Ω 91Ω 910Ω 9.1kΩ 91kΩ 910kΩ 9.1MΩ #generics #CommonPartsLibraryjharwinbarrozo1.5M
- A generic fixed capacitor ideal for rapid circuit topology development. You can choose between polarized and non-polarized types, its symbol and the footprint will automatically adapt based on your selection. Supported options include standard SMD sizes for ceramic capacitors (e.g., 0402, 0603, 0805), SMD sizes for aluminum electrolytic capacitors, and through-hole footprints for polarized capacitors. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard capacitor values: 1.0pF 10pF 100pF 1000pF 0.01uF 0.1uF 1.0uF 10uF 100uF 1000uF 10,000uF 1.1pF 11pF 110pF 1100pF 1.2pF 12pF 120pF 1200pF 1.3pF 13pF 130pF 1300pF 1.5pF 15pF 150pF 1500pF 0.015uF 0.15uF 1.5uF 15uF 150uF 1500uF 1.6pF 16pF 160pF 1600pF 1.8pF 18pF 180pF 1800pF 2.0pF 20pF 200pF 2000pF 2.2pF 22pF 20pF 2200pF 0.022uF 0.22uF 2.2uF 22uF 220uF 2200uF 2.4pF 24pF 240pF 2400pF 2.7pF 27pF 270pF 2700pF 3.0pF 30pF 300pF 3000pF 3.3pF 33pF 330pF 3300pF 0.033uF 0.33uF 3.3uF 33uF 330uF 3300uF 3.6pF 36pF 360pF 3600pF 3.9pF 39pF 390pF 3900pF 4.3pF 43pF 430pF 4300pF 4.7pF 47pF 470pF 4700pF 0.047uF 0.47uF 4.7uF 47uF 470uF 4700uF 5.1pF 51pF 510pF 5100pF 5.6pF 56pF 560pF 5600pF 6.2pF 62pF 620pF 6200pF 6.8pF 68pF 680pF 6800pF 0.068uF 0.68uF 6.8uF 68uF 680uF 6800uF 7.5pF 75pF 750pF 7500pF 8.2pF 82pF 820pF 8200pF 9.1pF 91pF 910pF 9100pF #generics #CommonPartsLibraryjharwinbarrozo1.5M
- A generic fixed inductor for rapid developing circuit topology. *You can now change the footprint and 3D model at the top level anytime you want. This is the power of #genericsjharwinbarrozo15.4k
- An electrical connector acting as reusable interface to a conductor and creating a point where external circuits can be connected.Terminal
- 47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film #forLedBlinkjharwinbarrozo1.2M
- 10uF Capacitor Aluminum Polymer 20% 16V SMD 5x5.3mm #forLedBlink #commonpartslibrary #capacitor #aluminumpolymer #radialcanjharwinbarrozo1.2M
- Yellow 595nm LED Indication - Discrete 1.7V 1206 (3216 Metric) #forLedBlinkjharwinbarrozo1.1M
Inspect
Gorgeous Coral Tricorder
Controls
Properties
Availability & Pricing
| Distributor | Qty 1 | |
|---|---|---|
| Arrow | $25.03–$29.80 | |
| Digi-Key | $36.53–$41.84 | |
| LCSC | $19.74–$21.97 | |
| Mouser | $39.11 | |
| TME | $8.25 | |
| Verical | $6.98–$15.64 | |
Assets
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