CM4 SPI problem

[Yli.8]

I think I have encountered some difficult problems. I hope the engineer of ST can help me.

I configured SPI+DMA to CM4 and then created two rPMSGs. RPMSg0 transmitted the data to CA7 in real time and RPMSg1 transmitted the heartbeat signal.

When CA7 returns the heartbeat, the unscheduled CM4 will stop all transmissions.