SPI1通讯问题求救

Man Dsan · 发表于 2015-7-21 10:28:52

将mini开发板上的SPI例程移植到STM32F103VET6板子上，对应的管脚改为PB3-SCK,PB4-MISO,PB5-MOSI,PB6-CS，然后就一直读不出ID号，后查询资料得知STM32F103VET6的PB3和PB4默认为JTAG功能，要remap,但是remap后还是读不出，总是串口返回check failed please check，现将代码贴出，求大神指点迷津

[mw_shl_code=c,true]void SPI1_Init(void) { GPIO_InitTypeDef GPIO_InitStructure; SPI_InitTypeDef SPI_InitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE ); RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE ); RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE ); GPIO_PinRemapConfig(GPIO_Remap_SWJ_Disable, ENABLE); GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable, ENABLE); GPIO_PinRemapConfig(GPIO_Remap_SPI1, ENABLE); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_3; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOB, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin =GPIO_Pin_4; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; GPIO_Init(GPIOB, &GPIO_InitStructure); RCC_APB2PeriphResetCmd(RCC_APB2Periph_SPI1,ENABLE); RCC_APB2PeriphResetCmd(RCC_APB2Periph_SPI1,DISABLE); GPIO_SetBits(GPIOB,GPIO_Pin_5|GPIO_Pin_3|GPIO_Pin_4); SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex; SPI_InitStructure.SPI_Mode = SPI_Mode_Master; SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b; SPI_InitStructure.SPI_CPOL = SPI_CPOL_High; SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge; SPI_InitStructure.SPI_NSS = SPI_NSS_Soft; SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256; SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB; SPI_InitStructure.SPI_CRCPolynomial = 7; SPI_Init(SPI1, &SPI_InitStructure); SPI_Cmd(SPI1, ENABLE); SPI1_ReadWriteByte(0xff); } [/mw_shl_code]