Cannot be used with SD.h

[Zhu-jiatong]

I intended to use the library with SD card, but it seems that the initialisation of SD card always fails. Meanwhile, using the hardware SPI works.

Sketch to reproduce on ESP32:

#include <SoftSPI.h>
#include <SD.h>
#include <iostream>

SoftSPI sSPI(MOSI, MISO, SCK);

// the setup function runs once when you press reset or power the board
void setup() {
	Serial.begin(115200);
	std::cout << "Test Begins:\n";
	bool isSdSuccess = SD.begin(SS, sSPI);
	std::cout << "SD Setup: " << std::boolalpha << isSdSuccess << '\n';
}

// the loop function runs over and over again until power down or reset
void loop() {

}