GenoGlobe
Learning from Life

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# Fluid Ardule UI Design (v1 Draft)

## 1. Core Principles
- UNO = UI frontend
- Pi = backend engine
- Minimal controls, maximum clarity
- 1602 LCD = status + simple menu + confirmation only

---

## 2. Home Screens

### Home A
FluidArdule OK  
SF:SalC5 Vol:78  

### Home B
MIDI IN:Active  
DAC:USB Audio OK  

---

## 3. Menu Structure

HOME  
├─ Volume (read-only)  
├─ SoundFont  
├─ MIDI Info  
├─ System  
└─ Power  

---

## 4. Encoder Behavior

### Rotate
- Navigate menu
- Change values

### Click
- Enter menu
- Confirm selection

### Long Press
- Home: Panic
- Menu: Back/Cancel

---

## 5. LED Definition

### SYSTEM LED
- Slow blink: Booting
- Fast blink: Initializing
- Solid: Ready

### MIDI LED
- Blink on MIDI activity

### ALERT LED
- Slow blink: Missing device
- Fast blink: Error

---

## 6. UNO ↔ Pi Protocol (Draft)

### Commands
````
CMD PANIC  
CMD SF_LOAD <name>  
CMD RESCAN_DAC  
CMD SHUTDOWN  
````
### Responses

````
ACK <cmd>  
ERR <code>  
STATE <status>  
INFO <key> <value>  
HB  
````
---

## 7. Implementation Priority

1. Home screen + LED  
2. Menu navigation  
3. Panic  
4. SoundFont  
5. Power  
6. System/MIDI info  

---

## 8. Navigation Recommendation

Home screen switching:

**Recommended: LEFT/RIGHT buttons**

Reason:
- Semantic match (screen pages = horizontal concept)
- Less conflict with menu navigation (UP/DOWN)
- More intuitive for users

Alternative:
- UP/DOWN 가능하지만 메뉴 이동과 혼동 가능

Conclusion:
👉 LEFT/RIGHT = Best choice for Home A ↔ B switching