How to read initialization from L9663 data using SPI?

Forum|Forum|2 years ago
February 7, 2024
3 replies
3067 views

Hello,

I stareted to develop PSI5 interface with L9663. My point is to read initialization data via SPI. If I set DOUT1 as direct data output (CH1_CR1->DOUT1_SE = 0), I am able to measure received data on this pin. But if I set this pin as interrupt (CH1_CR1->DOUT1_SE = 1), then I am not able to read initialization data via SPI (but interrupt is active).

My procedure:

1. set READ_INIT_DATA1 bit in CH1_CR1

2. Enable PSI5 (with requierd settings)

3. Reading initialization data by this command:

After this INITDATA_RDY in SR3 is not set. Is this procedure correct? What I should write to "init_buf_id" and "Register" bits? I tried to make loop for all possible combinations, but there wasn't any data.

Thank you for your response.

AutoDevKit Studio

Best answer by Max VIZZINI

Hi,

you are right.

We do not have PSI5 transceiver software in AutoDevKit.

Best Regards,

AutoDevKit Team

SCONI.8

ST Employee

Hi,

INITDATA_RDY (SR3[2]) not set indicates that no valid init data were captured by the device (initdata buffer is empty).

Did you check if your frame format is compliant with the initdata capture requirements? (20 bits payload: 3 bits Frame control bits, 1 status bit, 16 data bits).

O

Ondrej1Author

Associate II

Hi. Yes, I have already checked it and format is not compliant.

SCONI.8

ST Employee

So, I assume that not compliant frame the main motivation of the problem! (That's why you can see initdata on doutx in mode2 operation, but the device cannot capture initdata).

D

DWA_46810

Visitor II

Hello, I am a first-year graduate student at Shandong University of Technology. I am currently using l9663. Can you provide me with some example programs? Even just a function for writing data to the l9663 register will do. I want to test whether there is a problem with my board.If possible, I would really appreciate it.