void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
/* Configure PA5£¬PA7 in output nopull mode */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_7;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz ;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(GPIOA, GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(GPIOA, GPIO_InitStructure);
GPIO_PinAFConfig(GPIOA,GPIO_PinSource4, GPIO_AF_0);
GPIO_PinAFConfig(GPIOA,GPIO_PinSource5, GPIO_AF_0);
GPIO_PinAFConfig(GPIOA,GPIO_PinSource6, GPIO_AF_0);
GPIO_PinAFConfig(GPIOA,GPIO_PinSource7, GPIO_AF_0);
}
void RCC_Configuration(void)
{
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB|RCC_AHBPeriph_GPIOA |RCC_AHBPeriph_GPIOC , ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);
}
void SPI_Configuration(void)
{
SPI_InitTypeDef SPI_InitStructure;
SPI_InitStructure.SPI_Direction=SPI_Direction_2Lines_FullDuplex;
SPI_InitStructure.SPI_CPHA=SPI_CPHA_2Edge;
SPI_InitStructure.SPI_CPOL=SPI_CPOL_High;
SPI_InitStructure.SPI_BaudRatePrescaler=SPI_BaudRatePrescaler_8 ;
SPI_InitStructure.SPI_CRCPolynomial=7;
SPI_InitStructure.SPI_DataSize=SPI_DataSize_8b;
SPI_InitStructure.SPI_FirstBit=SPI_FirstBit_MSB;
SPI_InitStructure.SPI_Mode=SPI_Mode_Master;
SPI_InitStructure.SPI_NSS=SPI_NSS_Soft ;
SPI_Init(SPI1, SPI_InitStructure);
SPI_NSSInternalSoftwareConfig(SPI1,SPI_NSSInternalSoft_Set);
SPI_SSOutputCmd(SPI1, ENABLE);
SPI_Cmd(SPI1, ENABLE);
}
基本的配置就是这样，下面是我写的读写函数
uint8_t SPI2_ReadWriteByte(uint8_t TxData)
{
uint8_t RxData = 0;
while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET);
SPI_SendData8(SPI1, TxData);
while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET);
RxData = SPI_ReceiveData8(SPI1);//SPI2
return (uint8_t)RxData;
}
每次都会死在红色的地方，这究竟是为什么呢？
我看了一下深入浅出
STM32-NUCLEO-072RB的资料，有点问题，里边这样配置：
void SPI1_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
SPI_InitTypeDef SPI_InitStructure;
RCC_AHBPeriphClockCmd(SPI_GPIO_CLK,ENABLE);
RCC_APB2PeriphClockCmd(SPI_CLK, ENABLE);
GPIO_InitStructure.GPIO_Pin = SPI_SCK_PIN|SPI_MISO_PIN|SPI_MOSI_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(SPI_GPIO_PORT , GPIO_InitStructure);
GPIO_PinAFConfig(SPI_GPIO_PORT, SPI_SCK_SOURCE , SPI_SCK_AF);
GPIO_PinAFConfig(SPI_GPIO_PORT, SPI_MISO_SOURCE, SPI_MISO_AF);
GPIO_PinAFConfig(SPI_GPIO_PORT, SPI_MOSI_SOURCE, SPI_MOSI_AF);
//SPI CONFIGURATION
SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4;
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_InitStructure.SPI_CRCPolynomial = 7;
SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
SPI_Init(SPI1, SPI_InitStructure);
SPI_NSSInternalSoftwareConfig(SPI1, SPI_NSSInternalSoft_Set);
SPI_RxFIFOThresholdConfig(SPI1, SPI_RxFIFOThreshold_QF);
SPI_Cmd(SPI1, ENABLE); /* SPI enable */
}
这是里边的定义：
#define SPI_CLK RCC_APB2Periph_SPI1
#define SPI_GPIO_CLK RCC_AHBPeriph_GPIOB
#define SPI_GPIO_PORT GPIOB /* GPIOB*/
#define SPI_SCK_PIN GPIO_Pin_3 /* PB.3 */
#define SPI_SCK_SOURCE GPIO_PinSource3
#define SPI_SCK_AF GPIO_AF_0
#define SPI_MISO_PIN GPIO_Pin_4 /* PB.4 */
#define SPI_MISO_SOURCE GPIO_PinSource4
#define SPI_MISO_AF GPIO_AF_0
#define SPI_MOSI_PIN GPIO_Pin_5 /* PB.5 */
#define SPI_MOSI_SOURCE GPIO_PinSource5
#define SPI_MOSI_AF GPIO_AF_0
SPI1对应的端口不是PB而是PA，只有重映射了才会这样，但是没找到是在哪里重映射的。
且不说这个问题，大家怎么看卡死在
while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET);
大神现身吧
举报
