问答-
N32G430与STM32F407 SPI通信问题
用STM32F407作为主机，N32G430作为从机，主机发送一个8位数据，从机通过SPI2接收并存到变量rec里。目前主机信号发送正常，从机程序每次都跑死在while(SPI_I2S_Flag_Status_Get(SPI_SLAVE,SPI_I2S_FLAG_RNE)==RESET)这一步。查了用户手册说这个标志位会在接收数据后硬件清除，不知道怎么回事。贴出部分程序，求大神解答qwq。SPI_Initializes_Structure(&SPI_InitStructure);SPI_InitStructure.DataDirection=SPI_DIR_DOUBLELINE_FULLDUPLEX;SPI_InitStructure.SpiMode=SPI_MODE_SLAVE;SPI_InitStructure.DataLen=SPI_DATA_SIZE_8BITS;SPI_InitStructure.CLKPOL=SPI_CLKPOL_LOW;SPI_InitStructure.CLKPHA=SPI_CLKPHA_FIRST_EDGE;SPI_InitStructure.NSS=SPI_NSS_SOFT;/*ItisrecommendedthattheSPImastermodeoftheCversionchipsshouldnotexceed18MHz*/SPI_InitStructure.BaudRatePres=SPI_BR_PRESCALER_8;SPI_InitStructure.FirstBit=SPI_FB_MSB;SPI_InitStructure.CRCPoly=7;SPI_Initializes(SPI2,&SPI_InitStructure);SPI_Set_Nss_Level(SPI2,SPI_NSS_LOW);SPI_CRC_Enable(SPI_SLAVE);SPI_ON(SPI_SLAVE);while(1){while(SPI_I2S_Flag_Status_Get(SPI_SLAVE,SPI_I2S_FLAG_RNE)==RESET)rec=SPI_I2S_Data_Get(SPI_SLAVE);}
2024-01-05 0
