ESP32S3 FSPIWP\FSPIDQS pin and how do you specify it ?

[srnet]

Using an ESP32S3 Dev Kit board with the Arduino IDE 1.8.19 and 2.0.13 ESP32 Core.

I was trying some code for a LoRa device and not knowing what the FSPIW\FSPIDQS (GPIO14) pin was on the pinout I used it for the LoRa devices TX_Enable pin. This caused problems. A transmit program would start, the USB port would disconnect and the program would run at 1/3rd normal speed. Clearly the FSPIW\FSPIDQS pin was interfering in some way. It seems like its an ESP32S3 do not use pin.

The program works fine when the TX_Enable pin is allocated elswhere or just not used and you can start SPI with the normal SPI.begin() or indeed SPI.begin(12, 13, 11);

I have not come across an FSPIW\FSPIDQS pin on an SPI bus before, and although its mentioned in the ESP32S3 datasheet I cannot seem to find an explanation of what its for.

Any idea how can you specify specify the FSPIW\FSPIDQS eleswhere out of the way or just disable it alltogether ?

I have asked in the Espressif forums, no response.

[oldcurmudgeon]

By default, the pin mapping for SPI is:

SPI	MOSI	MISO	CLK	CS
VSPI	GPIO 23	GPIO 19	GPIO 18	GPIO 5
HSPI	GPIO 13	GPIO 12	GPIO 14	GPIO 15

Are you using the HSPI interface?

[srnet]

Thanks for the reply.

I am using the default SPI that the ESP32 Core uses when 'ESP32S3 Dev Module' is selected.

I said above I was using SPI.begin() etc and I am not doing an assignment such as;

SPIClass sdSPI(FSPI);

Just the SPI.Begin();

The pinouts you quote dont seem to match those on the Espressif pin map, but work for me with for instance SCK on 12;

Maybe the pinouts you posted are for a plain old ESP32, and not the S3 varient ?

[oldcurmudgeon]

Yes it was the plain wroom 32, not the S3. Apparently the different modules have different pinouts.