ESP32-POE Crashing with HSPI class instance

[FutureTechLab]

I tried to create an alternate SPI bus for the ESP32-POE. The default SPI pins were not working while connected via POE. For this I used the multiple SPI bus example from the ESP32 Arduino libraries. I'm trying to run the bus at a modest 1MHz. I'm also running the Ethernet ETH.h library.

https://github.com/espressif/arduino-esp32/blob/master/libraries/SPI/examples/SPI_Multiple_Buses/SPI_Multiple_Buses.ino

Some sample code:

#include <SPI.h>
#define ETH_CLK_MODE ETH_CLOCK_GPIO17_OUT
#define ETH_PHY_POWER 12
#include <ETH.h>

#define HSPI_SCLK 33
#define HSPI_MISO 34
#define HSPI_MOSI 35
#define HSPI_SS 36
SPIClass * hspi = NULL;

void setup() {
 
  Serial.begin(115200);
  WiFi.onEvent(WiFiEvent);
  ETH.begin();
 

  // init SPI
  hspi = new SPIClass(HSPI);
  hspi->begin(HSPI_SCLK, HSPI_MISO, HSPI_MOSI, HSPI_SS);
}

The error message:

Rebooting...
ets Jul 29 2019 12:21:46

rst:0xc (SW_CPU_RESET),boot:0x1b (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0018,len:4
load:0x3fff001c,len:1044
load:0x40078000,len:10124
load:0x40080400,len:5856
entry 0x400806a8
ETH Started
Guru Meditation Error: Core  1 panic'ed (LoadProhibited). Exception was unhandled.
Core 1 register dump:
PC      : 0x400d25bb  PS      : 0x00060e30  A0      : 0x800d08d6  A1      : 0x3ffb1ed0 
A2      : 0x00000000  A3      : 0x000f4240  A4      : 0x00000001  A5      : 0x3ffc2b64 
A6      : 0xffffffff  A7      : 0x00000000  A8      : 0xfffffffb  A9      : 0x3ffb1ec0 
A10     : 0x00000002  A11     : 0x0000005a  A12     : 0x3ffc2c02  A13     : 0x00000002 
A14     : 0x00000001  A15     : 0x3ffbdc74  SAR     : 0x00000000  EXCCAUSE: 0x0000001c 
EXCVADDR: 0x00000004  LBEG    : 0x4000c2e0  LEND    : 0x4000c2f6  LCOUNT  : 0x00000000 

ELF file SHA256: 0000000000000000

Backtrace: 0x400d25bb:0x3ffb1ed0 0x400d08d3:0x3ffb1f00 0x400d0a93:0x3ffb1f30 0x400d0b8c:0x3ffb1f50 0x400d15f6:0x3ffb1f70 0x400d55ba:0x3ffb1fb0 0x4008a512:0x3ffb1fd0

Rebooting...

edit:
I was able to find the problem. The libraries which relied on the SPI instance were using the static SPI instance rather than the SPIclass instance so hspi->begin(...) is not enough. You must also alter the library to accept the class instance. In my case: mfrc522.attachSPI(hspi); // must be called first. I hope this helps someone else!