硬件平臺

STM32開發板

0.96寸OLED屏（SPI接口）

功能實現

??在OLED屏上實現字符串滾動顯示。
??0.96寸OLED分辨率為128*64(128列，64行)。我們可以定義二維數組緩沖區buff[64][128]，先將要顯示的數據放在緩沖驅動中，然后按固定頻率將數據更新到屏幕上。

示例效果

STM32驅動OLED屏滾動顯示

軟件設計

?顯示一列數據函數

/*
函數功能: 顯示一列
函數參數:
        u8 x  - 橫坐標位置
        u8 y  - 縱坐標位置
        u8 size -字體大小
        u8 *p - 源數據
說    明:保證縱向為8的倍數
取模方式:縱向取模，以8個點為單位進行取模，高位在前
*/
void OLED_DrawRecData2(u8 x,u8 y,u8 size,const u8 *p)
{
    u8 y0=y; //保存y坐標
    u8 i,j;
    u8 data=0;
    for(i=0;i

滾動顯示函數(左移顯示)

/******************************字符串滾動顯示****************************
**左移滾動顯示
**  u8 x,u8 y  --- 顯示的起始位置
**  u8 size    --- 字體大小
**  u8 *p      --- 需要滾動顯示的數據
**  u8 number  --- 要顯示的漢字個數
*******************************************************************/
void OLED_Left_Move_Display(u8 x,u8 y,u8 size,u8 *p,u8 number)
{
  int x0=x;//顯示的起始位置
  int i=0;
  u8 *data=p;
  u16 cnt=0,offset=0;
  while(1)
  {
    for(cnt=0,i=x0;i<128;i++)
    {
      OLED_DrawRecData2(i,y,size,data+cnt);//顯示一列
      cnt+=size/8;//一列的偏移量
    }
    OLED_RefreshGRAM(); //更新一次顯示
    x0--;//左移顯示
    if(x0<=0)//完整顯示完一行數據
    {
       x0=0;
       data+=size/8;//數據的起始位置往后移動
    }  
    offset++;
    if(offset>=number*size+128)//保存顯示的數據完整滾動完一遍
     {
        offset=0; //歸位
        x0=x;
        data=p;//數據地址歸位
     } 
  }   
}

主函數

/*測試數據:  縱向取模，以8個點為單位進行取模，高位在前*/
 u8 font_test2[28][32]=
{
{0x20,0x08,0x24,0x10,0x22,0x60,0x21,0x80,0x26,0x41,0x39,0x32,0x02,0x04,0x0C,0x18,0xF0,0x60,0x13,0x80,0x10,0x60,0x10,0x18,0x14,0x04,0x18,0x02,0x00,0x01,0x00,0x00},/*"歡",0*/

{0x02,0x00,0x02,0x02,0x42,0x04,0x33,0xF8,0x00,0x04,0x00,0x02,0x3F,0xF2,0x20,0x22,0x40,0x42,0x00,0x02,0x3F,0xFE,0x20,0x42,0x20,0x22,0x3F,0xC2,0x00,0x02,0x00,0x00},/*"迎",1*/

{0x00,0x84,0x10,0x84,0x10,0x88,0x14,0x88,0x13,0x90,0x10,0xA0,0x10,0xC0,0xFF,0xFF,0x10,0xC0,0x10,0xA0,0x11,0x90,0x16,0x88,0x10,0x88,0x10,0x84,0x00,0x84,0x00,0x00},/*"來",2*/

{0x20,0x01,0x20,0x02,0x20,0x04,0x20,0x18,0x20,0x60,0x3F,0x80,0x22,0x00,0x22,0x00,0x22,0x02,0x22,0x01,0x22,0x02,0x23,0xFC,0x20,0x00,0x20,0x00,0x20,0x00,0x00,0x00},/*"萬",3*/

{0x10,0x41,0x12,0x42,0x12,0x44,0x12,0x58,0xFF,0xE0,0x12,0x40,0x12,0x40,0x10,0x40,0x00,0x00,0x7F,0xFF,0x40,0x10,0x44,0x08,0x5B,0x10,0x60,0xE0,0x00,0x00,0x00,0x00},/*"邦",4*/

{0x00,0x00,0x00,0x10,0x00,0x20,0x00,0x42,0xFE,0xC4,0x93,0x48,0x92,0x71,0x92,0x42,0x92,0x4C,0x92,0x70,0x92,0x42,0xFE,0x41,0x00,0x42,0x00,0x7C,0x00,0x00,0x00,0x00},/*"易",5*/

{0x01,0x00,0x01,0x00,0x77,0xFE,0x11,0x24,0x11,0x24,0x11,0x24,0x17,0xFE,0xF1,0x00,0x10,0x81,0x11,0x02,0x1E,0x0C,0x12,0xF0,0x72,0x0C,0x02,0x82,0x03,0x01,0x00,0x00},/*"嵌",6*/

{0x02,0x20,0x0C,0x20,0x88,0x20,0x69,0x20,0x09,0x20,0x09,0x22,0x89,0x21,0x69,0x7E,0x09,0x60,0x09,0xA0,0x19,0x20,0x28,0x20,0xC8,0x20,0x0A,0x20,0x0C,0x20,0x00,0x00},/*"學",7*/

{0x00,0x00,0x40,0x10,0x40,0x18,0x40,0x10,0x48,0x20,0x44,0x20,0x43,0x20,0x40,0x40,0x40,0x40,0x40,0x82,0x40,0x81,0x40,0x02,0x7F,0xFC,0x00,0x00,0x00,0x00,0x00,0x00},/*"習",8*/

{0x01,0x00,0x01,0x00,0x77,0xFE,0x11,0x24,0x11,0x24,0x11,0x24,0x17,0xFE,0xF1,0x00,0x10,0x81,0x11,0x02,0x1E,0x0C,0x12,0xF0,0x72,0x0C,0x02,0x82,0x03,0x01,0x00,0x00},/*"嵌",9*/

{0x00,0x01,0x00,0x02,0x00,0x04,0x00,0x08,0x00,0x30,0x80,0xC0,0x47,0x00,0x38,0x00,0x07,0x00,0x00,0xC0,0x00,0x30,0x00,0x0C,0x00,0x02,0x00,0x01,0x00,0x01,0x00,0x00},/*"入",10*/

{0x08,0x00,0x08,0x04,0x09,0x06,0x09,0x04,0x09,0xFC,0x09,0x08,0x09,0x08,0x08,0x08,0x08,0x00,0xFF,0xC0,0x08,0x30,0x08,0x08,0x88,0x04,0x68,0x02,0x08,0x1F,0x00,0x00},/*"式",11*/

{0x01,0x00,0x41,0x01,0x41,0x02,0x41,0x0C,0x7F,0xF0,0x41,0x00,0x41,0x00,0x41,0x00,0x41,0x00,0x41,0x00,0x7F,0xFF,0x41,0x00,0x41,0x00,0x41,0x00,0x01,0x00,0x00,0x00},/*"開",12*/

{0x00,0x00,0x00,0x04,0x18,0x08,0x68,0x31,0x08,0xC1,0x0B,0x01,0x1D,0x82,0xE9,0x62,0x09,0x14,0x09,0x08,0x09,0x14,0x49,0x22,0x29,0xC2,0x08,0x01,0x00,0x01,0x00,0x00},/*"發",13*/
};
int main(void)
{  
  u8 *p;
  BEEP_Init(); //初始化蜂鳴器
  LED_Init();  //初始化LED燈
  KEY_Init();  //初始化按鍵
  USART1_Init(115200);  //初始化串口1  
  OLED_Init(); 				  //OLED顯示屏初始化
	OLED_Clear(0x00);    	//清屏  
  p=font_test2[0]; //要顯示的字符串
  while(1)
  {
    OLED_Left_Move_Display(127,10,16,p,14);//滾動顯示
  }
}

結論:0.96寸OLED屏硬件自帶滾動顯示效果，但使用OLED屏硬件方式實現滾動無法靈活顯示，采用軟件方式實現滾動顯示更加靈活便捷。

審核編輯：符乾江