SLIDE Hardware Requirements
Thought for 10 sec
I’ll treat the primary mechanical placements as locked, audit the board for overlaps, off-board parts, orientation issues, decoupling/support-part placement, and unrouted readiness, then clean up only the small components. I’ll leave the power-switch area flexible and won’t route yet.
Worked for 13 mins 55 sec
Small-part placement and silkscreen cleanup are complete, but the audit found real pre-routing blockers: incomplete U2/U3/U4 power wiring and an exposed-pad conflict in U2’s footprint. I’m fixing those electrical issues now while keeping every locked primary location unchanged.
Worked for 47 sec
Small-component placement and silkscreen cleanup are complete, with all primary/mechanical components held fixed. No routing or copper was added.
Remaining before routing
- Fix incomplete U2/U3/U4 power circuitry; currently 45 ERC floating-pin errors.
- Resolve five U2 exposed-pad/footprint net conflicts.
- Decide how to handle J1 shell pads extending beyond the board.
- Finalize SW3 placement.
- Re-run DRC/ERC and routing-congestion checks; 96 airwires are expected before routing.
Execution stopped because no ACUs remain.
Fix electrical blockers
Clean blockers and SW3
Explain ERC errors
Place SW3
Review J1 shell
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Firmware Getting Started
Target: ESP-IDF for ESP32-S3-WROOM-1-N16R8.
Provisional pin map
Table
| GPIO | Net / function |
|---|---|
| 19 | Native USB D− |
| 20 | Native USB D+ |
| 4,5,6,7 | Fader ADC 1–4 |
| 11 | Display MOSI |
| 12 | Display SCLK |
| 14 | Display RESET# |
| 21 | Display D/C# |
| 47 | Display CS# |
| 15 | I2S BCK |
| 16 | I2S LRCK |
| 17 | I2S DATA OUT |
| 18 | MIDI UART TX |
| 9 | Speaker amp shutdown (active low) |
| 0 | BOOT strap/button only |
| EN | RESET button / RC |
GPIO0 is a strap pin and is reserved solely for BOOT. GPIO45/46 and memory-reserved resources are not used for application I/O. Final audit against Espressif N16R8 module documentation is required before freeze.
Required peripherals
- Native USB Serial/JTAG or TinyUSB device
- SPI master for CH1115 Raystar OLED
- ADC sampling for four faders
- GPIO capture-switch input (blocked until exact CPG135301D02 part is available)
- I2S TX, 3-wire BCK/LRCK/DATA for PCM5102A internal PLL mode
- UART TX at 31,250 baud, 8-N-1 for MIDI
- GPIO output for amplifier shutdown
Startup
- Initialize NVS/clocks; hold amplifier shutdown low.
- Initialize native USB.
- Calibrate/configure ADC fader inputs.
- Reset and initialize CH1115 display over SPI.
- Start I2S clocks/data; release PCM5102A mute.
- Start MIDI UART.
- Release amplifier shutdown after valid audio.
Build
Install current ESP-IDF, run
idf.py set-target esp32s3, then idf.py build flash monitor.Provisional pin map
Required peripherals
Startup
Build
