how to speed up SPI async transmit

[Green1]

Hi there,

When testing SPI (driver 2.0.0) transmit, the time gap between 2 frames (or 2 bytes, spi data width is of sync transmit is around 1.5us, while time gap of async transmit is around 15us, which highly limits the transmit speed.

Any setting to lower this time gap?

[Green1]

miss some words

2 frames (or 2 bytes, spi data width is eight) of sync transmit is around 1.5us