i.MX ProcessorsのトピックiMX8M SPI Interrupt Requirements

iMX8M SPI Interrupt Requirements

charleshuang — Fri, 07 May 2021 06:42:02 GMT

CPU: iMX8M
Yocto 2.5

In the 4.3.10 Interrupt Requirements of i.MX_Reference_Manual.pdf
I don't understand the meaning of this parameter(BaudRate/ Transfer Length)
Can you explain it more detail ?

Does it mean that when I transmit data of this 32-bit transfer length on a baud rate of 1 Mbps, an interrupt will be triggered after 31250 transmissions?

Can I confirm the number of interrupt by "cat /proc/interrupts | grep ecspi"?

How do I use spidev_test tool to verify typical case and worst case?

Re: iMX8M SPI Interrupt Requirements

Zhiming_Liu — Sat, 08 May 2021 02:41:38 GMT

Does it mean that when I transmit data of this 32-bit transfer length on a baud rate of 1 Mbps, an interrupt will be triggered after 31250 transmissions?

---> Yes

Can I confirm the number of interrupt by "cat /proc/interrupts | grep ecspi"?

---> Of course ,you can

How do I use spidev_test tool to verify typical case and worst case?

---> The spidev_test doesn't have these functin, it can only do basic tranfer/mode test