nrf52840 I2S打开读取数据，会占用全部资源 When nrf52840 I2S is opened to read data, it will occupy all resources

[xingye123]

When I2S reads the digital audio sensor, when strat is turned on_ After I2S, the data can be read and recognized normally, but this action takes up the whole CPU occupancy rate, and other functions such as broadcast buttons can't work. I don't know what's going on for a long time, so I ask the gods to answer

[Håkon Alseth]

Hi,

 

The peripheral itself uses DMA for transferring, so it should not be blocking the CPU.

How are you handling this in your application?

 

Kind regards,

Håkon

[xingye123]

I thought so, but I don't know what went wrong，

as long as I2S is turned on_ start,static void data_ The handler function doesn't handle anything, and there's no way to broadcast,

[Håkon Alseth]

Hi,

 

Do you have any spare GPIOs? You could try setting / clearing them in different functions to see where the CPU is stuck for longer periods.

How many bytes are you sending over I2S?

 

Kind regards,

Håkon

[xingye123]

When I reduce the sampling frequency, I can send broadcast events, but I can't connect. I think it is interrupted by I2S transmission when I connect. However, I have adjusted the interrupt priority of I2S to 7, the lowest priority

[xingye123]

Nrf52832 is normal, we found that the two chips have different differences

[Hilary Gugo]

Kindly check your inbox and reply i need your help