low performance in MQX SPI driver

[bugs]

In poll mode t takes 2.2us to send one character in 12MHz baudrate.

In interrupt mode t takes 4.0us to send one character in 12MHz baudrate.

I checked the poll mode driver, it calls _dspi_polled_tx_rx() for every character it sends, and it also wait for the read back in this function.

The driver doesn't take the advantage of FIFO

[Microfelix]

 I have the same problem.
It 'been resolved?

maurizio

[MarkP_]

Hi,

Have you tried the processor expert driver code?

I first tried I2C with MQX driver, it jammed. Then changed  to P&E code (for K60/K10), works fine.

The driver functions are in one (generated) file, easy to check what's happening.

~Mark

[DavidS · Accepted solution]

Hi Mircofelix,

Our MQX development team is working to improve the driver performance and an update is expected in our MQX3.8 release mid next month.

Regards,

David

[DavidS · Accepted solution]

Hi Mircofelix,

Our MQX development team is working to improve the driver performance and an update is expected in our MQX3.8 release mid next month.

Regards,

David