How to connect Turtle board SPI to W5500 Ethernet module?

#1

Look at the pin out of turtle board, there is no CSC pin from SPI, how to connect this pin to W5500? Any connection diagram between Turtle to W5500 I can get that
This Turtle board’s SPI is dedicated by used of W5500, no need to configure or do something?

#2

Turtle MISO – W5500 MISO
Turtle MOSI – W5500 MOSI
Turtle SCK – W5500 SCK
Those three pins are also used for LoRa SPI communication, you just need change a NSS for W5500. For example:
W5500 NSS – Turtle PB7

1 Like
#3

To work properly with the W5500 you need to connect as well the W5500 Interrupt pin to one GPIO and register the pin via:

  • InterruptIn etherIntr(XXX); // your GPIO
  • etherIntr.fall(callback(&ethernetIO));

The void ethernetIO(void) function does not need to do anything, just sent the INT_ETHER flag (add to main.h, use:

  • InterruptMSG(INT_ETHER);

The interrupt will wakeup the MCU from sleep/deepsleep and in the main routine you can check Ethernet IO in the main loop via

  • if (pendirqs & INT_ETHER) {
    }

We wish you success with your projects.

PS: Don’t forget that the SPI bus can be used with one device at a time. (LoRa or Ethernet). You can use UpdateNodeStartup() to switch LoRa into an OffLine mode which means no incoming LoRa Interrupts.