Unable to get a valid SPI interface on Raspberry Pi 5

[hardcore-thinking]

Describe the bug
I'm still stuck with the Raspberry Pi example. I try to use it on my Raspberry Pi 5, but I am not able to get a valid SPI handle.

To Reproduce
I'm using a modified Raspberry Pi example.

#include <iostream>
#include <cstdlib>
#include <sstream>

#include <RadioLib.h>
#include "hal/RPi/PiHal.h"
#include <lgpio.h>

PiHal* hal = new PiHal(1);

SX1262 radio = new Module(hal, 7, 17, 22);

int main(int argc, char** argv) {
	std::cout << "[SX1262] Initializing ... ";
  	
	int state = radio.begin(868.0);;
  	if (state != RADIOLIB_ERR_NONE) {
		std::cout << "failed, code " << state << std::endl;
    		return EXIT_FAILURE;
  	}
  	
	std::cout << "success!" << std::endl;

  	int count = 0;
  	while (true) {
    		printf("[SX1262] Transmitting packet ... ");
    		char str[64];
    		sprintf(str, "Hello World! #%d", count++);
    		
		state = radio.transmit(str);
    		if(state == RADIOLIB_ERR_NONE) {
      			std::cout << "success!" << std::endl;

      			hal->delay(1000);
    		}
		
		else {
      			std::cout << "failed, code " << state << std::endl;
    		}
  	}

	delete hal;

  	return EXIT_SUCCESS;
}

Expected behavior
Just make the SX1262 work fine on my Raspberry Pi 5 using the example for the Raspberry Pi.

Screenshots
No screenshots but I do have the errors:

I get these when the SPI interface is turned off using raspi-config (which I can only assume is normal):

Could not open SPI handle on 0: can not open SPI device
Could not perform SPI transfer: unknown handle
Could not perform SPI transfer: unknown handle
Could not perform SPI transfer: unknown handle
Could not perform SPI transfer: unknown handle
Could not perform SPI transfer: unknown handle
Could not perform SPI transfer: unknown handle

And I get these when it is on (the same goes for the other SPI CS pin 8):

Could not claim pin 7 for mode 1: GPIO busy
Error writing value to pin 7: GPIO busy
Error writing value to pin 7: GPIO busy
Error writing value to pin 7: GPIO busy
Error writing value to pin 7: GPIO busy
Error writing value to pin 7: GPIO busy
Error writing value to pin 7: GPIO busy

Which I don't understand because, the SX1262 HAT excluded, nothing is on the GPIO. When checking the pins with lgpio, I get this though :

Handle 0 / Line 7's informations:
        - Offset: 7
        - Flags: 7
                - Kernel: In use by the kernel
                - Kernel: Output
                - Kernel: Active low
        - Name: GPIO7
        - User: spi0 CS1

Handle 0 / Line 8's informations:
        - Offset: 8
        - Flags: 7
                - Kernel: In use by the kernel
                - Kernel: Output
                - Kernel: Active low
        - Name: GPIO8
        - User: spi0 CS0

And I don't know what to do with these.

Additional info (please complete):

• Host machine: Raspberry Pi 5
• Wireless module type: SX1262
• Library version: 7.1.2

[hardcore-thinking]

Ok I think I got it working for the Raspberry Pi 5 (finally). So, for whoever is passing by in quest for a solution, here's what I did using informations from an old issue :

• Check that you SPI interface is enabled in raspi-config ;
• Use the correct pins: CS = 21, IRQ = 16, RST = 18 and BUSY = 20 (thanks past jgromes). It worked for my case, probably because of the specific model I use. Maybe those in the example will work for you ;
• I don't know if it really helped but, unlike the example, I used spiChannel = 0 in PiHal's constructor ;
• Once again, I don't know if this helped, but I added this line to the end of dtoverlay=spi1-0cs to /boot/firmware/config.txt

I still have a problem when running the program. I can't seem to get access back to previously enumerated pins. As if the program is still running in the background. But at least I managed to send something.

[hardcore-thinking]

I forgot to post the code that worked (although not really different):

#include <iostream>
#include <cstdlib>
#include <sstream>

#include <RadioLib.h>
#include "hal/RPi/PiHal.h"
#include <lgpio.h>

PiHal* hal = new PiHal(0);
SX1262 radio = new Module(hal, 21, 16, 18, 20);

int main(int argc, char** argv) {
	std::cout << "[SX1262] Initializing ... ";
  	
	// forgot to mention these too lines
	// it's so that I don't get a -707 error
	// (cf. Troubleshooting section in the wiki)
	radio.XTAL = true;
	radio.setTCXO(0.0); 

	int state = radio.begin(868.0);;
  	if (state != RADIOLIB_ERR_NONE) {
		std::cout << "failed, code " << state << std::endl;
    		return EXIT_FAILURE;
  	}
  	
	std::cout << "success!" << std::endl;

  	int count = 0;
  	while (true) {
    		printf("[SX1262] Transmitting packet ... ");
    		char str[64];
    		sprintf(str, "Hello World! #%d", count++);
    		
		state = radio.transmit(str);
    		if(state == RADIOLIB_ERR_NONE) {
      			std::cout << "success!" << std::endl;

      			hal->delay(1000);
    		}
		
		else {
      			std::cout << "failed, code " << state << std::endl;
    		}
  	}

	delete hal;

  	return EXIT_SUCCESS;
}

[hardcore-thinking]

Ok I'm gonna close the issue and start a discussion about joining TTN network.