Esp32s3 implement spi

[dimajolkin]

Hi! I tried to create a SPI, and it seems to have worked. I tested it on esp32s3-wroom1
I ran LILYGO T-Deck Plus.

It also changed to a gradual frequency increase. My esp32s3-wroom1 would freeze if I set it to 240 immediately.

[dgryski]

/cc @ysoldak

[ysoldak]

Sorry, I have esp32c3 only, not "s", otherwise would help testing, of course.

[deadprogram]

I have a esp32-s3 to test with, and will take a look.

[deadprogram]

So far I have not been able to get SPI working on my Xiao ESP32s3 with this PR.

Any thoughts on this @dimajolkin ?

[dimajolkin]

I will check docs for this MC) And order this for test

@deadprogram I made a quick fix to the frequency calculation. Can you check it?

[dimajolkin]

I've placed an order for this MK. When it arrives, I'll debug it for him too, if the fix doesn't work.

Additions:

const (
	TFT_SCLK machine.Pin = 7 // SCK - Serial Clock (GPIO7)
	TFT_MOSI machine.Pin = 8 // MOSI / SDO (GPIO8)
)

func main() {
	spi := machine.SPI1
	spi.Configure(machine.SPIConfig{
		SCK:       TFT_SCLK,
		SDO:       TFT_MOSI,
	})

7, 8 - pins tested too