SPI very slow

[jollytopper]

I'm making consecutive calls to one device using polling transactions. I have acquired the bus in initialization. My transactions are relatively short and usually come in chunks of 10 (10 polling transactions).

I find that the speed is still not satisfactory. How can I improve this?

[jollytopper]

Specifically, by logging a time value I'm reading that each polling transaction takes around 3 ms. Should it not be much quicker? <100 us?

[ESP_michael]

Hi jollytopper,
What's your clock speed?
Can you provide a piece of simple code for us to test it? From our internal test, one-byte transaction should only take 8us (at 10MHz).

[jollytopper]

I have found that the problem was I was outputting many ESP_LOG statements over UART, thus causing delay.

[jollytopper]

I have found that the problem was I was outputting many ESP_LOG statements over UART, thus causing delay.

[Ritesh]

Hi,

So, After reducing logs dis you get improvement into SPI Speed?

[jollytopper]

Yes. Speed improved significantly after removing log statements.

[Ritesh]

Yes. Speed improved significantly after removing log statements.

Great. Thanks for update regarding same.