关于STM32的SPI问题集锦
1、STM32F207 使用SPI2收不到数据的问题问:我使用STM32F207的SPI2控制模数转换器AD977时, STM32F207处理器的SPI2工作在单向只接收模式(从模式)下,我的SPI2总是接收不到数据(但在SPI2_MOSI管脚上有数据,时钟也有,我用示波器看的),请帮我分析一下。我的SPI及管脚配置如下:
void SPI2_Config(void)
{
//NVIC_InitTypeDef NVIC_InitStructure;
/* Enable the SPI clock */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE);
/* Enable GPIO clocks */
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);
/* Connect SPI pins to AF5 */
//GPIO_PinAFConfig(GPIOB, GPIO_PinSource13, GPIO_AF_SPI2);
//GPIO_PinAFConfig(GPIOB, GPIO_PinSource15, GPIO_AF_SPI2);
//GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
//GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
//GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
//GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_DOWN;
/* SPI SCK pin configuration */
//GPIO_InitStructure.GPIO_Pin =GPIO_Pin_13;
//GPIO_Init(GPIOB, &GPIO_InitStructure);
/* SPI MOSI pin configuration */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_DOWN;
//GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15;
//GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
//GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
GPIO_Init(GPIOB, &GPIO_InitStructure);
/* SPI configuration -------------------------------------------------------*/
SPI_I2S_DeInit(SPI2);
SPI_Cmd(SPI2, DISABLE);
SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
SPI_InitStructure.SPI_Mode=SPI_Mode_Slave;
SPI_InitStructure.SPI_DataSize = SPI_DataSize_16b;
SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
<span style="font-size: 10.5pt; font-family: 'Times New Roman'; mso-spacerun: 'yes'">SPI2->CR1=0
RE:关于STM32的SPI问题集锦
楼主能给分原理图吗?1822674111@qq.com谢谢RE:关于STM32的SPI问题集锦
这个要看看:PRE:关于STM32的SPI问题集锦
你好,我想问一下STM32F10X系列的SPI接口是4线模式吗,那么相当于CS信号(CE)的是NSS吗?具体该如何配置?RE:关于STM32的SPI问题集锦
这几天写一个STM32F103VC与AT45DB642D芯片通信的程序,可是总是数据写不到存储芯片内,哪位高手帮我看下是怎么回事?谢谢了!void SPI_Configuration(void)
{
SPI_InitTypeDefSPI_InitStructure;
SPI_Cmd(SPI1, DISABLE);
SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;//设置SPI单向或者双向的数据模式:SPI设置为双线双向全双工
SPI_InitStructure.SPI_Mode = SPI_Mode_Master; //设置SPI工作模式:设置为主SPI
SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;//设置SPI的数据大小:SPI发送接收8位帧结构
SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;//选择了串行时钟的稳态:时钟 悬空低
SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge; //数据捕获于第二个时钟沿
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;//NSS信号由硬件(NSS管脚)还是 软件(使用SSI位)管理:内部NSS信号有SSI位控制
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_8;//定义波特 率预分频的值:波特率预分频值为256
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB; //指定数据传输从MSB位还是LSB位开始:数据传输从MSB位开始
SPI_InitStructure.SPI_CRCPolynomial = 7; //CRC值计算的多项式
SPI_Init(SPI1, &SPI_InitStructure);//根据SPI_InitStruct中指定的参数初始化外设SPIx寄存器
SPI_Cmd(SPI1, ENABLE); //使能SPI外设
}
/***Dataflash_write2flash()*****连续写数据到SPI Flash内部**************/
Dataflash_write2flash(unsigned char* data, unsigned int page, unsigned int address, unsigned int size, FLASH_BUFFER_NUM buffer_num)
{
u16 i;
if(SPI_Data_Flash_Busy_Detect()==0) //==0 Data Flash空闲
{
SPI_Data_Flash_AT_SELECT(); //片选Dataflash
if(buffer_num == FLASH_BUFFER1)
SPI_ReadWrite_Byte(AT45DB_BUFFER_1_WRITE_FLASH );
else
SPI_ReadWrite_Byte(AT45DB_BUFFER_2_WRITE_FLASH);
SPI_ReadWrite_Byte(page>>5);
SPI_ReadWrite_Byte((page8));
SPI_ReadWrite_Byte(address);
for (i=0; i
页:
[1]