spis 数据发送不正常

[swibyn]

用nRF5SDK160098a08e2里面的spis工程在52832开发板上跑，但数据发送不正常

untitled.logicdata

1，从逻辑分析仪图上看，spi主的时序没问题，发送的数据内容也没问题，但MISO这跟线的数据经常发不完整

[Amanda Hsieh]

Hi, 

Do you mean nRF52832DK MISO sent incomplete data while executing the SDK 16/spis example? If so, which pin are you using for MISO on Slave and Master boards?

-Amanda H.

[swibyn]

Yes, in the example, the MISO pin is p0.30, but  i use the silicon's efm32zgf32 to work as the Master spi。  

[Amanda Hsieh]

Did you set the same SPI mode on both sides?

-Amanda H.

[swibyn]

Yes,I did

[Amanda Hsieh]

Unfortunately, we do have efm32zg210f32 and could not use DKs to reproduce the problem.

-Amanda H.

[swibyn]

Did you test it with my code? I tested it with two efm32zg boards, and both produce the same problem.

or could you send your code to me.

[Amanda Hsieh]

Assuming nRF52832 operates as an SPIS slave then there must be a delay between CSN (Enable) go low, and first CLK cycle. This delay depends on the power mode (see https://devzone.nordicsemi.com/support-private/support/207669#permalink=371965), the delay should be >10us for low power mode (default) and >1us for constant latency mode.

-Amanda H.