Posted on February 04, 2016 at 14:02I have just made my own SPI3 initilization code as its shown below.
void Spi_Init(void)
{
SPI_InitTypeDef SPI_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
SPI_StructInit(&SPI_InitStructure);
/*!< Enable the SPI clock */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI3, ENABLE);
/*!< Enable GPIO clocks */
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE);
/*!< Connect SPI pins to AF5 */
GPIO_PinAFConfig(GPIOC, GPIO_PinSource10, GPIO_AF_SPI3);
GPIO_PinAFConfig(GPIOC, GPIO_PinSource11, GPIO_AF_SPI3);
GPIO_PinAFConfig(GPIOC, GPIO_PinSource12, GPIO_AF_SPI3);
/*!< SPI pins configuration *************************************************/
GPIO_InitStructure.GPIO_Pin = GPIO_PinSource10|GPIO_PinSource11|GPIO_PinSource12;
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_NOPULL;
GPIO_Init(GPIOC, &GPIO_InitStructure);
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_Low;
SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_32;
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
/*!< Disable SPI */
SPI_Cmd(SPI3, DISABLE);
SPI_Init(SPI3, &SPI_InitStructure);
/*!< Enable SPI */
SPI_Cmd(SPI3, ENABLE);
}
at main c i have this code running
while(1)
{
SPI3->DR = 0x15;
}
But I can not see clk signal on my ossiloscope is my init code is wrong or smtn else
