Posted on October 14, 2013 at 11:27Hello,
I've some problems with the SPI interface of the STM32F405 microcontroller. I hope someone could help me.
I've a F-RAM connected to the STM32F405 via SPI. I'll checked pin connection and GPIO configuration with an oscilloscope ( set/reset IO), all works.
But I'm not able to receive or transmit data with SPI interface. There is no clock generating on the Clock pin (PC10).
To my code :
GPIO_InitTypeDef GPIO_InitStructure;
SPI_InitTypeDef SPI_InitStructure;
SPI_I2S_DeInit( SPI3);
/* Enable GPIO and SPI Periph Clock */
RCC_AHB1PeriphClockCmd( RCC_AHB1Periph_GPIOC | RCC_AHB1Periph_GPIOB | RCC_AHB1Periph_GPIOA, ENABLE );
RCC_APB1PeriphClockCmd( RCC_APB1Periph_SPI3, ENABLE );
/* Connect CLK, MISO, MOSI and CS on AF6 */
GPIO_PinAFConfig( GPIOC, GPIO_Pin_10, GPIO_AF_SPI3 );
GPIO_PinAFConfig(
GPIOC
,
GPIO_Pin_11
, GPIO_AF_SPI3 );
GPIO_PinAFConfig(
GPIOC
,
GPIO_Pin_12
, GPIO_AF_SPI3 );
GPIO_PinAFConfig( GPIOA,
GPIO_Pin_4
, GPIO_AF_SPI3 );
/* Configure SPI pins: ---------------------------------------------------*/
/* Configure SCK MISO and MOSI pins as Alternate Function Push Pull */
GPIO_InitStructure.GPIO_Pin =
GPIO_Pin_10
|
GPIO_Pin_11
|
GPIO_Pin_12
;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_Init( GPIOC, &GPIO_InitStructure );
/* Configure CS pin */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_Init( GPIOA, &GPIO_InitStructure );
GPIO_SetBits( GPIOA,
GPIO_Pin_4
);
/* Configure Write Protection pin (active low) */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_Init( GPIOB, &GPIO_InitStructure );
GPIO_SetBits(
GPIOB
,
GPIO_Pin_0
);
/* SPI Configuration -----------------------------------------------------*/
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_256;
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_Init( SPI3, &SPI_InitStructure );
/* TEST */
/* Enable the SPI peripheral */
SPI_Cmd( SPI3, ENABLE );
/* Enable CS (active low) */
GPIO_ResetBits( GPIOA, GPIO_Pin_4);
while( 1 )
{
SPI_I2S_SendData( SPI3, 0xAA );
}
Thanks & Best regards,
Aurélie.
