stm32f103oled4线spi配置函数

以下是基于标准库的STM32F103C8T6与OLED 0.96寸4线SPI的配置函数示例，供参考：

#include "stm32f10x.h"
#include "oled.h"

void OLED_GPIO_Config(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
  
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
  
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12 | GPIO_Pin_13 | GPIO_Pin_15;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOB, &GPIO_InitStructure);
  
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_14;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOB, &GPIO_InitStructure);
}

void OLED_SPI_Config(void)
{
    SPI_InitTypeDef SPI_InitStructure;
  
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, 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_High;
    SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;
    SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
    SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_8;
    SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
    SPI_InitStructure.SPI_CRCPolynomial = 7;
    SPI_Init(SPI1, &SPI_InitStructure);
  
    SPI_Cmd(SPI1, ENABLE);
}

void OLED_Init(void)
{
    OLED_GPIO_Config();
    OLED_SPI_Config();
  
    GPIO_SetBits(GPIOB, GPIO_Pin_12);
}

void OLED_WriteByte(uint8_t data)
{
    while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET);
    SPI_I2S_SendData(SPI1, data);
    while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET);
    SPI_I2S_ReceiveData(SPI1);
}

void OLED_SetPos(uint8_t x, uint8_t y)
{
    OLED_WriteByte(0xb0+y);
    OLED_WriteByte(((x&0xf0)>>4)|0x10);
    OLED_WriteByte((x&0x0f)|0x01);
}

void OLED_Fill(uint8_t fill_Data)
{
    uint8_t m,n;
    for(m=0;m<8;m++)
    {
        OLED_WriteByte(0xb0+m);
        OLED_WriteByte(0x00);
        OLED_WriteByte(0x10);
        for(n=0;n<128;n++)
        {
            OLED_WriteByte(fill_Data);
        }
    }
}

void OLED_CLS(void)
{
    OLED_Fill(0x00);
}

void OLED_ON(void)
{
    GPIO_SetBits(GPIOB, GPIO_Pin_13);
}

void OLED_OFF(void)
{
    GPIO_ResetBits(GPIOB, GPIO_Pin_13);
}

void OLED_ShowStr(uint8_t x,uint8_t y,uint8_t ch[])
{
    uint8_t c=0,i=0,j=0;
    while (ch[j]!='\0')
    {       
        c = ch[j]-32;
        if(x>120)
        {
            x=0;
            y++;
        }
        OLED_SetPos(x,y);
        for(i=0;i<6;i++)
        {
            OLED_WriteByte(F6x8[c][i]);
        }
        x += 6;
        j++;
    }
}

其中，`OLED_GPIO_Config()`和`OLED_SPI_Config()`函数用于初始化OLED的GPIO和SPI配置，`OLED_Init()`函数用于初始化OLED，`OLED_WriteByte()`函数用于向OLED写入数据，`OLED_SetPos()`函数用于设置OLED显示位置，`OLED_Fill()`函数用于填充OLED屏幕，`OLED_CLS()`函数用于清空OLED屏幕，`OLED_ON()`和`OLED_OFF()`函数用于控制OLED的开关，`OLED_ShowStr()`函数用于在OLED上显示字符串。