STM32硬件SPI驱动0.96寸的OLED

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1.OLED相关

参见—->51 软件模拟SPI驱动OLED

2.硬件SPI

参见—->SPI专题（二）——STM32驱动FLASH(W25Q64)

3.驱动程序

驱动程序参照51单片机进行移植，只不过模拟的SPI换成STM32硬件SPI，不用再写时序部分的代码。对于STM32的硬件SPI，我们在驱动FLASH中已有介绍，这里就不再做介绍。

OLED引脚部分定义：

#ifndef __OLED_H#define __OLED_H#include "spi.h"#include "stm32f10x.h"#include "stm32f10x_conf.h"#define Max_Column  128#define Max_Row     64#define SIZE 16 //显示字体选择#define RCC_APB2Periph_OLED_PORT    RCC_APB2Periph_GPIOA#define OLED_PORT                   GPIOA#define OLED_CS_PIN     GPIO_Pin_2#define OLED_CS_LOW     GPIO_ResetBits(GPIOA,GPIO_Pin_2)                        #define OLED_CS_HIGH    GPIO_SetBits(GPIOA,GPIO_Pin_2)#define OLED_DC_PIN     GPIO_Pin_3#define OLED_DC_LOW     GPIO_ResetBits(GPIOA,GPIO_Pin_3)#define OLED_DC_HIGH    GPIO_SetBits(GPIOA,GPIO_Pin_3)#define OLED_RST_PIN    GPIO_Pin_4#define OLED_RST_LOW    GPIO_ResetBits(GPIOA,GPIO_Pin_4)#define OLED_RST_HIGH   GPIO_SetBits(GPIOA,GPIO_Pin_4)#define OLED_CLK_PIN    GPIO_Pin_5#define OLED_DATA_PIN   GPIO_Pin_7void SPI_OLED_Init(void);void OLED_Write_Byte(uint8_t dat);void OLED_Write_Data(uint8_t dat);void OLED_Write_Cmd(uint8_t cmd);void OLED_Set_Pos(u8 x,u8 y);void OLED_Display_On(void);void OLED_Display_Off(void);void OLED_Display_Clear(void);void OLED_Display_Onechar(u8 x,u8 y,u8 str);void OLED_Display_String(u8 x,u8 y,u8 *str);void OLED_Display_Chinese(u8 x,u8 y,u8 no);void OLED_Display_Picture(u8 x0,u8 y0,u8 x1,u8 y1,u8 BMP[]);u32 OLED_Pow(u8 m,u8 n);void OLED_Display_Num(u8 x,u8 y,u32 num,u8 len,u8 size_num);void OLED_Init(void);#endif

连接的时候需要看清楚，一开始我就不小心把SPI的CLK与DO接反了，半天找不到原因，这种问题就太低级了，一定得多细心。

OLED初始化：

void SPI_OLED_Init(void){    GPIO_InitTypeDef GPIO_InitStructure;    RCC_APB2PeriphClockCmd(RCC_APB2Periph_OLED_PORT, ENABLE );    //片选信号初始化    GPIO_InitStructure.GPIO_Pin = OLED_CS_PIN|OLED_DC_PIN|OLED_RST_PIN;      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;  //复用推挽输出    GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;    GPIO_Init(OLED_PORT, &GPIO_InitStructure);    GPIO_SetBits(OLED_PORT,OLED_CS_PIN|OLED_DC_PIN|OLED_RST_PIN);    SPI1_Init();           //初始化SPI    SPI1_SetSpeed(SPI_BaudRatePrescaler_16);    //设置为18M时钟,高速模式}

OLED写数据实现：

//硬件SPI发送数据void OLED_Write_Byte(uint8_t dat){    SPI1_ReadWriteByte(dat);}//写入数据void OLED_Write_Data(uint8_t dat){    OLED_CS_LOW;    OLED_DC_HIGH;    OLED_Write_Byte(dat);}//写入命令void OLED_Write_Cmd(uint8_t cmd){    OLED_CS_LOW;    OLED_DC_LOW;    OLED_Write_Byte(cmd);}

下面就是OLED的具体实现，开启，初始化，写一个字节，写字符串等，也是在51MCU的基础上修改而成。

//Function:设置显示坐标//Input:x:横坐标;y:纵坐标//Output:无//Return:无//Others:无void OLED_Set_Pos(uint8_t x,uint8_t y){    OLED_Write_Cmd(0xb0+y);//列偏移    OLED_Write_Cmd(((x&0xf0)>>4)|0x10);//行高四位地址    OLED_Write_Cmd((x&0x0f)|0X01);//行低四位地址}//Function:开启OLED显示//Input:无//Output:无//Return:无//Others:无void OLED_Display_On(void){    OLED_Write_Cmd(0X8D);//设置DCDC    OLED_Write_Cmd(0X14);//打开DCDC    OLED_Write_Cmd(0XAF);//打开OLED}//Function:关闭OLED显示//Input:无//Output:无//Return:无//Others:无void OLED_Display_Off(void){    OLED_Write_Cmd(0X8D);//设置DCDC    OLED_Write_Cmd(0X10);//关闭DCDC    OLED_Write_Cmd(0XAE);//关闭OLED}//Function:清屏//Input:无//Output:无//Return:无//Others:无void OLED_Display_Clear(void){    u8 page,len;    for(page=0;page<8;page++)    {        OLED_Write_Cmd(0xB0+page);//设置页地址(0--7)        OLED_Write_Cmd(0X00);//设置显示位置—列低地址        OLED_Write_Cmd(0X10); //设置显示位置—列高地址        for(len=0;len<128;len++)            OLED_Write_Data(0);//写入0;屏熄灭    }}//Function:在指定位置显示一个字符,包括部分字符    //x:0~127;y:0~63;size:选择字体 16/12 //Input:x：横坐标;y:纵坐标;str:显示的字符//Output:无//Return:无//Others:无               void OLED_Display_Onechar(u8 x,u8 y,u8 str){    u8 i=0,ret=0;    //ret = str -32;    ret = str - ' ';//得到偏移后的值,对ASCLL码进行一个减法.即在二维数组里找它的位置      if(x>Max_Column-1)    {        x = 0;        y = y + 2;//针对16号的字符    }    if(SIZE == 16 )    {        OLED_Set_Pos(x,y);        //16的字体分成两部分写入        for(i=0;i<8;i++)        OLED_Write_Data(F8X16[ret*16+i]);        OLED_Set_Pos(x,y+1);        for(i=0;i<8;i++)            OLED_Write_Data(F8X16[ret*16+i+8]);    }    else{        OLED_Set_Pos(x,y+1);        for(i=0;i<6;i++)            OLED_Write_Data(F6x8[ret][i]);    }}//Function:显示字符串//Input:x：横坐标;y:纵坐标;str:显示的字符串//Output:无//Return:无//Others:无void OLED_Display_String(u8 x,u8 y,u8 *str){    u8 i=0;    while(str[i]!='\0')    {        OLED_Display_Onechar(x,y,str[i]);        x += 8;        if(x>120)        {            x = 0;            y += 2;        }        i++;    }}//Function:显示中文//Input:x：横坐标;y:纵坐标;no:显示的字的序号//Output:无//Return:无//Others:无void OLED_Display_Chinese(u8 x,u8 y,u8 no){    u8 ch,addr=0;    OLED_Set_Pos(x,y);    for(ch=0;ch<16;ch++)//数组行列寻址    {        OLED_Write_Data(TEST[2*no][ch]);//汉字是2个字节        addr += 1;    }    OLED_Set_Pos(x,y+1);    for(ch=0;ch<16;ch++)    {        OLED_Write_Data(TEST[2*no+1][ch]);        addr += 1;    }}//Function:显示图片//Input:x0,x1：横坐标;y0,y1:纵坐标;BMP:显示的图片//注意：y1<8,页寻址模式//Output:无//Return:无//Others:无void OLED_Display_Picture(u8 x0,u8 y0,u8 x1,u8 y1,u8 BMP[]){    u8 x,y;    u32 i=0;    if(y1%8==0)        y = y1 / 8;    else        y = y1 /8 + 1;    for(y=y0;y<y1;y++)    {        OLED_Set_Pos(x0,y);        for(x=x0;x<x1;x++)        {            OLED_Write_Data(BMP[i++]);        }    }}//计算m的n次方u32 OLED_Pow(u8 m,u8 n){    u32 ret = 1;    while(n--)        ret *= m;    return ret;}//Function:显示数字//Input:x：横坐标;1:纵坐标;num:显示的数字：len：数字长度;size_num:数字字体//Output:无//Return:无//Others:无void OLED_Display_Num(u8 x,u8 y,u32 num,u8 len,u8 size_num){    u8 t,temp;    u8 enshow = 0;    for(t=0;t<len;t++)    {        temp = (num/OLED_Pow(10,len-t-1))%10;//把显示的数字一位一位取出来        if(enshow==0&&t<(len-1))        {            if(temp==0)            {                OLED_Display_Onechar(x+(size_num/2)*t,y,' ');                continue;            }            else                enshow = 1;        }        OLED_Display_Onechar(x+(size_num/2)*t,y,temp+'0');    }}//初始化SSD1306//命令设置与开启函数作用重叠......void OLED_Init(void){    SPI_OLED_Init();    OLED_RST_HIGH;    delay_ms(200);    OLED_RST_LOW;    delay_ms(200);    OLED_RST_HIGH;     OLED_Write_Cmd(0xAE);//关闭OLED    OLED_Write_Cmd(0x00);//设置列低位地址    OLED_Write_Cmd(0x10);//设置列高位地址    OLED_Write_Cmd(0x40);//设置起始行地址及映射RAM显示起始行 (0x00~0x3F)    OLED_Write_Cmd(0x81);//对比度设置    OLED_Write_Cmd(0xCF); // Set SEG Output Current Brightness    OLED_Write_Cmd(0xA1);//--Set SEG/Column Mapping     0xa0左右反置 0xa1正常    OLED_Write_Cmd(0xC8);//Set COM/Row Scan Direction   0xc0上下反置 0xc8正常    OLED_Write_Cmd(0xA6);//设置显示方式;bit0:1,反相显示;0,正常显示    OLED_Write_Cmd(0xA8);//设置驱动路数(1 to 64)    OLED_Write_Cmd(0x3f);//--1/64 duty    OLED_Write_Cmd(0xD3);//-设置显示偏移(0x00~0x3F)    OLED_Write_Cmd(0x00);//-not offset    OLED_Write_Cmd(0xd5);//--set display clock divide ratio/oscillator frequency    OLED_Write_Cmd(0x80);//--set divide ratio, Set Clock as 100 Frames/Sec    OLED_Write_Cmd(0xD9);//--set pre-charge period    OLED_Write_Cmd(0xF1);//Set Pre-Charge as 15 Clocks & Discharge as 1 Clock    OLED_Write_Cmd(0xDA);//--set com pins hardware configuration    OLED_Write_Cmd(0x12);    OLED_Write_Cmd(0xDB);//--set vcomh    OLED_Write_Cmd(0x40);//Set VCOM Deselect Level    OLED_Write_Cmd(0x20);//设置页地址模式(0x00/0x01/0x02)    OLED_Write_Cmd(0x02);//    OLED_Write_Cmd(0x8D);//--set Charge Pump enable/disable    OLED_Write_Cmd(0x14);//--set(0x10) disable    OLED_Write_Cmd(0xA4);//禁用显示开启;bit0:1,开启;0,关闭;(白屏/黑屏)(0xa4/0xa5)    OLED_Write_Cmd(0xA6);// 不使用反向显示 (0xa6/a7)     OLED_Write_Cmd(0xAF);//打开显示    OLED_Write_Cmd(0xAF); /*display ON*/    OLED_Display_Clear();    OLED_Set_Pos(0,0);  }

实现效果：

这里写图片描述

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