Define SPI for use

[michaliskon]

trafficstars

I have looked into the STM32Test example and I am trying to define an SPI bus to use in ESP32 w Arduino IDE.

#define IMPLEMENT_SPI_PORT_SELECTION 1
SPIClass SD_SPI(HSPI);
SdFat sd(&SD_SPI);

Compiling gives

Home_server:146:21: error: no matching function for call to SdFat::SdFat(SPIClass*)

	 SdFat sd(&SD_SPI);

					 ^

In file included from ...\coding\Arduino IDE\Home_server\Home_server.ino:34:0:

...\coding\Arduino IDE\libraries\ESP32_SdFat\src/SdFat.h:310:7: note: candidate: SdFat::SdFat()

class SdFat : public SdFileSystem<SdSpiCard> {

	   ^

...\coding\Arduino IDE\libraries\ESP32_SdFat\src/SdFat.h:310:7: note:   candidate expects 0 arguments, 1 provided

...\coding\Arduino IDE\libraries\ESP32_SdFat\src/SdFat.h:310:7: note: candidate: constexpr SdFat::SdFat(const SdFat&)

...\coding\Arduino IDE\libraries\ESP32_SdFat\src/SdFat.h:310:7: note:   no known conversion for argument 1 from 'SPIClass*' to 'const SdFat&'

...\coding\Arduino IDE\libraries\ESP32_SdFat\src/SdFat.h:310:7: note: candidate: constexpr SdFat::SdFat(SdFat&&)

...\coding\Arduino IDE\libraries\ESP32_SdFat\src/SdFat.h:310:7: note:   no known conversion for argument 1 from 'SPIClass*' to 'SdFat&&'

Edit: SdFat sd((SPIClass*)&SD_SPI); does not work either

[greiman]

I have not implemented SPI port selection for ESP32.

You could try the following.

At line 80 of SdFatConfig.h set USE_STANDARD_SPI_LIBRARY to 2 like this.

#define USE_STANDARD_SPI_LIBRARY 2 // 0

This at least causes the following to compile.

#include "SdFat.h"
SPIClass SD_SPI(HSPI);
SdFat sd(&SD_SPI);

void setup() {
  sd.begin();
}

void loop() {
}

If this fails, I don't have time to this problem.

[michaliskon]

Compiles and works like a charm with SdFat sd((SPIClass*)&SD_SPI)

Thank you greiman

[iharshadec]

@greiman I do not see this line 80. Is this changed in latest release? I am not able to begin SD using ESP32 with HSPI pin connections. It works fine if I choose VSPI but not when select HSPI.

[greiman]

I added an option to the ESP driver to use HSPI in V2 like this:

SPIClass SD_SPI(HSPI);
#define SPI_CLOCK SD_SCK_MHZ(50)
#define SD_CONFIG SdSpiConfig(SD_CS_PIN, DEDICATED_SPI, SPI_CLOCK, &SD_SPI)

...

  if (!sd.begin(SD_CONFIG)) {
    sd.initErrorHalt(&Serial);
  }

It seems unstable. You can try a slower clock or try the library driver by editing SdFatConfig.h at about line 115.

#define SPI_DRIVER_SELECT 1 // 0 change from 0 to 1.

[iharshadec]

Thank you @greiman for this notes. I was using SdFat-beta and now as this is merged to this main library I was trying to get this working. Yes I have observed that for ESP32 even with VSPI it's not working with 50Mhz it is stable only with 25Mhz. I will give this a try and see how it goes and will update here.