Struggling with SPI on nRF52832 communicating with L6470

RE: Struggling with SPI on nRF52832 communicating with L6470

jablackann — Tue, 17 Oct 2023 20:11:09 GMT

I think i figured it out. I was using the X-NUCLEO-IHM02A1 from ST as my development board.

The board has two L6470 Stepper drivers on it.

Looking at the user's guide for the L6470, I did not notice that SDO from the one L6470 was fed into the SDI of the other L6470.

The section below is from page 15 of the user's guide for the board.

I connected the SDO from the one L6470 back into the nRF52832 and I was able to get a status response from the L6470.

I guess you need to always read the user's guide thoroughly 5 times.

jablackann — Tue, 17 Oct 2023 14:43:01 GMT

Thanks for the response.

I am using NRF Connect SDK, toolchain 2.4.1, n RF52832 (using a nRF52 DK)

Here is the pin out. Sorry. I should have included this yesterday.

Nucleo board connection (L6470 board)	Nucleo board connection pin	NRF52 DK	SALEA LOGIC Color
L6470_0_STCK	J4 pin 1
L6470_0_nFLAG	PC1
L6470_0_nCS	PA4	P0.11	Yellow
L6470_0_nBUSY\SYNC	PC0
L6470_0_SDI	PA7	P0.30 MOSI	Blue
L6470_0_SCK	PB3	P0.31 SCK	Green wire
L6470_0_SDO	PA6	P0.29 MISO	Purple
L6470_nSTBY\nRST	PB5	P0.18 NRESET	Orange

Attached is the overlay file.

I tried turning on the Analog function on the Saleae logic. I don't see anything on the analog channel 7.

helsing — Tue, 17 Oct 2023 14:03:23 GMT

Hello jablackann,

Which pin is used for SDO? Would you perhaps be able to share your .overlay file?

Does your logic analyzer allow you to see analog signals? Is there any activity on the pin?