1. 确保正确连接了SPI设备和主控制器。检查时钟和数据线的接线是否正确。2. 检查SPI的时钟源是否正确...
Software can select any of four combinations of serial clock (SCK) phase and polarity with programmable bits in the SPICR. The clock polarity (CPOL) bit selects an active-High (clock idle state is Low) or active-Low clock (clock idle state is High). Dete
我按照官网提供的SPI例程,先初始化Module,然后在Channel初始化时,将SPI模式配置为3(clock polarity = 1;clock phase=1)。但是此时CLK的状态仍然为低电平,只有当发送一帧数据后,CLK状态才能够变成高电平。这样的话第一帧的CLK就少了一个下降边沿,导致数据读取异常。请问该问题该该怎解决!请大佬们不吝赐教! Like...
One of the devices in SPI bus uses kLPSPI_ClockPhaseSecondEdge whereas the other device uses kLPSPI_ClockPhaseFirstEdge . I am using LPSPI_MasterTransferBlocking(LPSPI_Type *base, lpspi_transfer_t *transfer) from fsl_lpspi.c to send&receive messages. But the transfer config cannot conf...
The master configures the clock polarity (CPOL) and clock phase (CPHA) to correspond to slave device requirements. These parameters determine when the data must be stable, when it should be changed according to the clock line and what the clock level is when the clock is not active. ...
One of the devices in SPI bus uses kLPSPI_ClockPhaseSecondEdge whereas the other device uses kLPSPI_ClockPhaseFirstEdge . I am using LPSPI_MasterTransferBlocking(LPSPI_Type *base, lpspi_transfer_t *transfer) from fsl_lpspi.c to send&receive messages. But the transfer config cannot ...
我按照官网提供的SPI例程,先初始化Module,然后在Channel初始化时,将SPI模式配置为3(clock polarity = 1;clock phase=1)。但是此时CLK的状态仍然为低电平,只有当发送一帧数据后,CLK状态才能够变成高电平。这样的话第一帧的CLK就少了一个下降边沿,导致数据读取异常。请问该问题该该怎解决!请大佬们不吝赐教!