Thanks ！@cek
cs should be low in read operation，problem has solved
Posts made by Linuxer
RE: OpenIMU 330BI EVK SPI 通信异常
posted in The OpenIMU Family • 26 Feb 2020, 01:25
RE: OpenIMU 330BI EVK SPI 通信异常
posted in The OpenIMU Family • 24 Feb 2020, 10:02
@cek I try to delay 1ms between request command and receive feedback, but has the same feedback : 0x00 0x00
OpenIMU 330BI EVK SPI 通信异常
posted in The OpenIMU Family • 24 Feb 2020, 05:48
主控：STM32F429
IMU：openimu330BI
SPI
频率：1MHz
mode： 1 1
问题描述：
将stm32f429作为SPI master， 使用SPI传输数据时，只能成功1次，后面读取的MISO数据全为0
eg：
MOSI ： 56 00 00 00 56 00 00 00
MISO ：00 00 33 00 00 00 00 00
CS是从一开始拉低一直到传输结束后才拉高，想请问下这个原因的可能地方在哪？谢谢