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stm32f205rg spi configuration

Question asked by chan.anson.002 on Jul 21, 2014
Latest reply on Jul 22, 2014 by chan.anson.002
hi,all
I'm working on a SPI interface on stm32f205rg. I'm newly using this chip. I do the configuration as I do on stm32f103 and of cause refer to example of stm32f2. It's just not working.
I configure SPI1 worked as a slave. And as I can see in debug, the SPI1->DR is not assigned when sending data. While the CLK from the Master is all right.
The code is as followed. Please see if I miss anything or wrong configured. Many thanks.
#include <string.h>
#include <stdbool.h>
#include "stm32f2xx.h"
 
/* Private constants -----------------------------------------------------------*/
#define SPI_BUF_SZ 128
 
/* Private typedef -------------------------------------------------------------*/
/* Private macro --------------------------------------------------------------*/
#define TIP_SPI SPI1
#define TIP_SPI_CLK_PIN  GPIO_Pin_3
#define TIP_SPI_MISO_PIN GPIO_Pin_4
#define TIP_SPI_MOSI_PIN GPIO_Pin_5
#define TIP_SPI_PORT     GPIOB
 
#define TIP_SPI_NSS_PIN     GPIO_Pin_4
#define TIP_SPI_NSS_PORT    GPIOA
 
#define SLV2MST_CS  GPIO_ResetBits(TIP_SPI_NSS_PORT,TIP_SPI_NSS_PIN)
#define SLV2MST_NCS GPIO_SetBits(TIP_SPI_NSS_PORT,TIP_SPI_NSS_PIN)
#define SLV2MST_IS_CS GPIO_ReadOutputDataBit(TIP_SPI_NSS_PORT,TIP_SPI_NSS_PIN)==Bit_RESET
 
/* Private variable -------------------------------------------------------------*/
/* Private functions prototype ----------------------------------------------------*/
/* Private functions ------------------------------------------------------------*/
uint8_t TIPSPI_BUF[128] = {0};
uint8_t dma_tx_available = 1;
uint8_t spi_rx_flag = 0;
 
void GpioInit(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
     
    /* configure GPIO*/
    RCC_AHB1PeriphClockCmd( RCC_AHB1Periph_GPIOA | RCC_AHB1Periph_GPIOB, ENABLE);
 
    /* Use Alternate Functions for SPI pins */
    GPIO_PinAFConfig( TIP_SPI_PORT,  TIP_SPI_CLK_PIN,  GPIO_AF_SPI1 );
    GPIO_PinAFConfig( TIP_SPI_PORT,  TIP_SPI_MISO_PIN,  GPIO_AF_SPI1    );
    GPIO_PinAFConfig( TIP_SPI_PORT,  TIP_SPI_MOSI_PIN,  GPIO_AF_SPI1    );
 
    /* Setup SPI pin types */
    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_DOWN;    
 
    GPIO_InitStructure.GPIO_Pin   = TIP_SPI_CLK_PIN | TIP_SPI_MISO_PIN | TIP_SPI_MOSI_PIN;
    GPIO_Init( TIP_SPI_PORT, &GPIO_InitStructure );
 
    /* Setup NSS pin type*/
    GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_OUT;
    GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_UP;  
    GPIO_InitStructure.GPIO_Pin   = TIP_SPI_NSS_PIN;
    GPIO_Init( TIP_SPI_NSS_PORT, &GPIO_InitStructure );
    SLV2MST_NCS;   
}
 
void SpiInit(void)
{
    SPI_InitTypeDef  SPI_InitStructure;
 
    GpioInit();
    NvicInit();
     
    /* configure SPI*/
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE );
     
    SPI_I2S_DeInit(TIP_SPI);
    SPI_Cmd(TIP_SPI, DISABLE);
 
    SPI_StructInit(&SPI_InitStructure);
 
    /*!< SPI configuration */
    SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
    SPI_InitStructure.SPI_Mode = SPI_Mode_Slave;
    SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
    SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
    SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;
    SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
    SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_16;
    SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_LSB;
    SPI_InitStructure.SPI_CRCPolynomial = 7;
    SPI_Init(TIP_SPI, &SPI_InitStructure);
 
    /* Enable the SPI peripheral */
    SPI_I2S_DMACmd(TIP_SPI,SPI_I2S_DMAReq_Rx,ENABLE);
    SPI_Cmd(TIP_SPI, ENABLE);       /* enable SPI1 module  */  
 
}
uint16_t SpiSend(uint8_t* buf, uint16_t len)
{
    SLV2MST_CS;
    while(len--)
    {
    while(SPI_I2S_GetFlagStatus(TIP_SPI, SPI_I2S_FLAG_TXE) == RESET);
        SPI_I2S_SendData(TIP_SPI, *buf++);
    }
    SLV2MST_NCS;
}
     
/* Private function prototypes -----------------------------------------------*/
int main(void)
{
    SpiInit();
 
    for(;;)
    {
        SpiSend("blah blah!",10);
        Spi_delay_ms(10);
    }
}

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