mirror of
https://github.com/logicog/RTLPlayground.git
synced 2026-08-30 14:52:51 +08:00
Taiga Ogawa
f6cb1152f9
- machine.c/h: add MACHINE_FNS1200P with verified GPIO assignments for both SFP ports, LED SET0 (amber 2.5G / green 1G-100M-10M) and SET1 (SFP all-speeds), led_mux from original firmware register dump, and machine_custom_init() enabling LED_GLB_IO_EN bit 6 - doc/devices/FNS-1200P.md: device overview, port layout, serial console (S1 three through-holes = UART0 115200 8N1 3.3V), LED and SFP GPIO tables - doc/devices/photos/FNS-1200P/: chassis front panel and PCB top photos - doc/supported_devices.md: add FNS-1200P to the list GPIO assignments and LED register values were cross-checked between live GPIO observation (RTLPlayground gpio command) and an original firmware register dump.
94 lines
3.9 KiB
Markdown
94 lines
3.9 KiB
Markdown
# FOXNEO FNS-1200P
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RTL8372-based 4×2.5G PoE+ + 2×SFP+ unmanaged switch.
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Using SPI clamp in-board is the only method for initial installation.
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### Label specifications
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- **Manufacturer**: FOXNEO
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- **Model**: FNS-1200P
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- **Ports**:
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- 4 × RJ45: 10/100/1000/2500 Mbps with PoE+
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- 2 × SFP+: 1G / 2.5G / 10G
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### What works
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- All four 2.5GBASE-T RJ45 ports at 10/100/1000/2500 Mbps (PoE+ is not configurable via RTLPlayground)
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- Both SFP+ ports supporting 1G, 2.5G and 10G modules
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- LEDs: amber (2.5G) and green (1G/100M/10M) per copper port; combined link/act on SFP ports
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### PCB overview
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**Board markings**
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- Top silkscreen: PCB-K0402W-U13-V2.0 / DIP-K0402WB-V2.0
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**Key components**
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- U3: SPI NOR flash, 2 MiB
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- U7: unpopulated SOP8 footprint — I2C bus (RTL8372 slave at 0x5c) is accessible from its pads, useful for register dumps
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- S1: unpopulated slide switch footprint (three through-holes used as serial console)
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Front panel
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<img src="photos/FNS-1200P/chassis-front.jpg" width="400" />
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Top side (PCB)
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<img src="photos/FNS-1200P/PCB-top.jpg" width="300" />
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### Port layout
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| Front panel position | Logical port | Physical port | Type |
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|----------------------|--------------|---------------|---------|
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| SFP left | 8 | 5 | SFP+ |
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| RJ45 1 | 4 | 1 | Copper |
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| RJ45 2 | 5 | 2 | Copper |
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| RJ45 3 | 6 | 3 | Copper |
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| RJ45 4 | 7 | 4 | Copper |
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| SFP right | 3 | 6 | SFP+ |
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### Serial console
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The PCB has three unpopulated through-holes intended for a slide switch, directly connected to UART0.
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Numbered from the left (SFP port side), the pinout is:
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| Position (left→right) | Signal | GPIO |
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|-----------------------|--------|--------------------------|
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| 1 (leftmost) | RX | GPIO32\_UART0\_RX (32) |
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| 2 (middle) | GND | GND |
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| 3 (rightmost) | TX | GPIO31\_UART0\_TX (31) |
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- **Settings**: 115200 baud / 8N1 / 3.3V TTL
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- Connect a USB-TTL adapter: adapter TX → pin 1, GND → pin 2, adapter RX → pin 3
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### LED configuration
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Copper ports use LED SET0, SFP ports use LED SET1.
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| SET | LED0 | LED2 |
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|------|--------------------------------------------------|---------------------------------------------------|
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| SET0 | Amber — lights on 2.5G link | Green — lights on 1G / 100M / 10M link |
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| SET1 | All speeds — lights on any link with activity | — |
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LED pad to physical port mapping:
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| GPIO pads | Port |
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|-----------|-------------------------|
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| GPIO8–11 | Physical port 5 (left SFP) |
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| GPIO12–14 | Physical port 1 (RJ45 1) |
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| GPIO15–17 | Physical port 2 (RJ45 2) |
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| GPIO18–20 | Physical port 3 (RJ45 3) |
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| GPIO21–23 | Physical port 4 (RJ45 4) |
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| GPIO24–27 | Physical port 6 (right SFP) |
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### SFP GPIO assignments
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| SFP | pin\_detect (ModAbs) | pin\_los | SerDes | I2C SDA | I2C SCL |
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|------------------|-----------------------------|------------------------|--------|----------------------|--------------------------|
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| Left (logical 8) | GPIO30\_ACL\_BIT3\_EN | GPIO37 | SDS1 | GPIO39\_I2C\_SDA4 | GPIO40\_I2C\_SCL3\_MDC1 |
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| Right (logical 3)| GPIO50\_I2C\_SCL2\_UART1\_TX | GPIO51\_I2C\_SDA2\_UART1\_RX | SDS0 | GPIO41\_I2C\_SDA3\_MDIO1 | GPIO40\_I2C\_SCL3\_MDC1 |
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GPIO assignments were verified by observing GPIO state changes during SFP module insertion/removal
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and cross-checked against an original firmware register dump.
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`pin_tx_disable` is GPIO\_NA on both ports (original firmware keeps all GPIOs as inputs).
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