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stm32f0 spi

Question asked by vadoud.ali on Aug 7, 2014
Latest reply on Aug 8, 2014 by vadoud.ali
hello, I want to send some data using spi but I see anything on my scope when I use this code.
does anyone know where is the problem?
Thanks
#include <stddef.h>
#include "stm32f0xx_rcc.h"
#include "stm32f0xx_gpio.h"
#include "stm32f0xx_spi.h"
#define cs GPIO_Pin_12
 
 
void set_SPI(void){
        GPIO_InitTypeDef GPIO_InitStructure;
        SPI_InitTypeDef SPI_InitStructure;
 
            RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE);
 
        /* Configure the I2C clock source. The clock is derived from the HSI */
 
 
            GPIO_InitStructure.GPIO_Pin = cs;
                GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
                GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
                GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
                GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
                GPIO_Init(GPIOB, &GPIO_InitStructure);
                GPIO_SetBits(GPIOB,cs);
        //Configure pins: SCL and SDA ------------------
        GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_14| GPIO_Pin_15;
        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(GPIOB, &GPIO_InitStructure);
 
        GPIO_PinAFConfig(GPIOB, GPIO_PinSource13, GPIO_AF_0);
            GPIO_PinAFConfig(GPIOB, GPIO_PinSource14, GPIO_AF_0);
            GPIO_PinAFConfig(GPIOB, GPIO_PinSource15, GPIO_AF_0);
 
         RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE);
 
        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_4;
        SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
 
        SPI_Init(SPI2, &SPI_InitStructure);
        SPI_Cmd(SPI2, ENABLE);
 
}
 
 
 
int main(void)
{
set_SPI();
for(;;)
{
    GPIO_ResetBits(GPIOB,cs);
    SPI_I2S_SendData16(SPI2,0b01010101);
}
 
}

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