To the board version V1 - NWI1199-DAT
Hardware
-
Optical Coupler IN1 = IO4, IN2 = IO5
-
ADC Sensor Input IO34
Ethernet LAN8720
-
Crystal control pin IO2
ESP32 Pin Mapping
| ESP32 | func | LAN8720 | Note |
|---|---|---|---|
| GPIO17 | PHY_POWER | NC - Osc. Enable | 4k7 Pulldown |
| GPIO22 | EMAC_TXD1 | TX1 | |
| GPIO19 | EMAC_TXD0 | TX0 | |
| GPIO21 | EMAC_TX_EN | TX_EN | |
| GPIO26 | EMAC_RXD1 | RX1 | |
| GPIO25 | EMAC_RXD0 | RX0 | |
| GPIO27 | EMAC_RX_DV | CRS | |
| GPIO00 | EMAC_TX_CLK | nINT/REFCLK (50MHz) | 4k7 Pullup |
| GPIO23 | SMI_MDC | MDC | |
| GPIO18 | SMI_MDIO | MDIO | |
| GND | GND | ||
| 3V3 | VCC |
Jumper Setup
| Jumpers | func | Set to | Set Default | Note |
|---|---|---|---|---|
| JP1 | CLK | IO0 | enable | |
| JP2 | REFCLKO | pull up | - | |
| JP3 | crystal | pull down | - | |
| JP4 | crystal | IO17 | - | |
| JP5 | crystal enable control by | IO2 or IO15 | Set to IO2 | pcb backside |
- please just use default
reference setup
- ETH_CLOCK_GPIO0_IN - default: external clock from crystal oscillator
- ETH_CLOCK_GPIO0_OUT - 50MHz clock from internal APLL output on GPIO0 - possibly an inverter is needed for LAN8720
- ETH_CLOCK_GPIO16_OUT - 50MHz clock from internal APLL output on GPIO16 - possibly an inverter is needed for LAN8720
- ETH_CLOCK_GPIO17_OUT - 50MHz clock from internal APLL inverted output on GPIO17 - tested with LAN8720
arduino demo output
based on demo code NWI1200-3
OP1 status: 0; OP2 status: 0
connecting to 163.com
HTTP/1.1 301 Moved Permanently
Server: nginx
Date: Tue, 19 Sep 2023 09:22:02 GMT
Content-Type: text/html
Content-Length: 178
Connection: keep-alive
Location: http://www.163.com/
<html>
<head><title>301 Moved Permanently</title></head>
<body bgcolor="white">
<center><h1>301 Moved Permanently</h1></center>
<hr><center>nginx</center>
</body>
</html>
closing connection
ETH status: 0, ETH MAC: 84:0D:8E:C8:8C:67, IPv4: 192.168.1.173, FULL_DUPLEX, 100Mbps
