拜托帮忙看一下我的oled屏幕一直不亮,芯片是atmega128的 oled走的是spi模式,现在真的搞得头晕,实在找不到原因为啥子不亮。以下是oled的代码
- #include <iom128.h>
- #include <delay.h>
- #include <oledfont.h>
- //8位LED灯控制端口定义,连接在PE口,灌电流模式
- #define LED PORTE //PE口接8个LED灯
- #define LEDDDR DDRE //PE口方向寄存器
- #define LED4_0 PORTE &= ~(1<<PE3) //D4亮
- #define LED4_1 PORTE |= (1<<PE3) //D4灭
- #define u8 unsigned char
- #define u32 unsigned int
- #define OLED_CMD 0 //写命令
- #define OLED_DATA 1 //写数据
- #define OLED_RST_Clr() PORTE &= ~(1 << PE6)
- #define OLED_RST_Set() PORTE |= (1 << PE6)
- #define OLED_DC_Clr() PORTE &= ~(1 << PE5)
- #define OLED_DC_Set() PORTE |= (1 << PE5)
- #define OLED_SCLK_Clr() PORTB &= ~(1 << PB1)
- #define OLED_SCLK_Set() PORTB |= (1 << PB1)
- #define OLED_SDIN_Clr() PORTB &= ~(1 << PB2)
- #define OLED_SDIN_Set() PORTB |= (1 << PB2)
- #define SIZE 16
- #define XLevelL 0x02
- #define XLevelH 0x10
- #define Max_Column 128
- #define Max_Row 64
- #define Brightness 0xFF
- #define X_WIDTH 128
- #define Y_WIDTH 64
- u8 OLED_GRAM[8][128]; //8页 128列
- void OLED_WR_Byte(u8 dat,u8 cmd);
- void OLED_Set_Pos(unsigned char x, unsigned char y) ;
- void OLED_Set_Pos(unsigned char x, unsigned char y) ;
- void OLED_Display_On(void);
- void OLED_Display_Off(void);
- void OLED_Clear(void);
- void OLED_DrawPoint(u8 x,u8 y,u8 t);
- void OLED_Fill(u8 x1,u8 y1,u8 x2,u8 y2,u8 dot);
- void OLED_ShowChar(u8 x,u8 y,u8 chr);
- void OLED_ShowNum(u8 x,u8 y,u32 num,u8 len,u8 size2);
- void OLED_ShowString(u8 x,u8 y, u8 *p);
- void OLED_Set_Pos(unsigned char x, unsigned char y);
- void OLED_ShowCHinese(u8 x,u8 y,u8 no);
- void OLED_DrawBMP(unsigned char x0, unsigned char y0,unsigned char x1, unsigned char y1,unsigned char BMP[]);
- void OLED_Init(void);
- void system_init();
- void system_init()
- {
- LEDDDR=0xff; //设置PE口为输出
- LED=0xff; //初始状态为高,关闭8个LED灯
- }
- //向SSD1306写入一个字节单位
- //dat:要写入的数据/命令
- //cmd:数据/命令标志 0命令 1数据
- void OLED_WR_Byte(u8 dat,u8 cmd)
- {
- u8 i;
- if(cmd)
- OLED_DC_Set();
- else
- OLED_DC_Clr();
- //OLED_CS_Clr();
- for(i=0;i<8;i++)
- {
- OLED_SCLK_Clr();
- if(dat&0x80)
- {
- OLED_SDIN_Set();
- }
- else OLED_SDIN_Clr();
- OLED_SCLK_Set();
- dat<<=1;
- }
- //OLED_CS_Set();
- OLED_DC_Set();
- }
- void OLED_Set_Pos(unsigned char x, unsigned char y) //坐标位置
- {
- OLED_WR_Byte(0xb0+y,OLED_CMD);//页
- OLED_WR_Byte(((x&0xf0)>>4)|0x10,OLED_CMD);//高四位
- OLED_WR_Byte((x&0x0f)|0x01,OLED_CMD); //低四位
- }
- //开启OLED显示
- void OLED_Display_On(void)
- {
- OLED_WR_Byte(0X8D,OLED_CMD); //电荷泵设置
- OLED_WR_Byte(0X14,OLED_CMD); //打开电荷泵
- OLED_WR_Byte(0XAF,OLED_CMD); //开启显示
- }
- //关闭OLED显示
- void OLED_Display_Off(void)
- {
- OLED_WR_Byte(0X8D,OLED_CMD);
- OLED_WR_Byte(0X10,OLED_CMD);//关 A2
- OLED_WR_Byte(0XAE,OLED_CMD);
- }
- //清屏函数,清完屏,整个屏幕是黑色的!和没点亮一样!!!
- void OLED_Clear(void)
- {
- u8 i,n;
- for(i=0;i<8;i++)
- {
- OLED_WR_Byte (0xb0+i,OLED_CMD); //设置页地址(0~7)
- OLED_WR_Byte (0x00,OLED_CMD); //设置显示位置—列低地址
- OLED_WR_Byte (0x10,OLED_CMD); //设置显示位置—列高地址
- for(n=0;n<128;n++)OLED_WR_Byte(0,OLED_DATA);
- } //更新显示
- }
- //在指定位置显示一个字符,包括部分字符
- //x:0~127
- //y:0~63
- //mode:0,反白显示;1,正常显示
- //size:选择字体 16/12
- void OLED_ShowChar(u8 x,u8 y,u8 chr)
- {
- unsigned char c=0,i=0;
- c=chr-' ';//得到偏移后的值
- if(x>Max_Column-1){x=0;y=y+2;}
- if(SIZE ==16)
- {
- OLED_Set_Pos(x,y);
- for(i=0;i<8;i++)
- OLED_WR_Byte(F8X16[c*16+i],OLED_DATA);
- OLED_Set_Pos(x,y+1);
- for(i=0;i<8;i++)
- OLED_WR_Byte(F8X16[c*16+i+8],OLED_DATA);
- }
- else
- {
- OLED_Set_Pos(x,y+1);
- for(i=0;i<6;i++)
- OLED_WR_Byte(F6x8[c][i],OLED_DATA);
- }
- }
- //m^n函数
- u32 oled_pow(u8 m,u8 n)
- {
- u32 result=1;
- while(n--)result*=m;
- return result;
- }
- //显示2个数字
- //x,y :起点坐标
- //len :数字的位数
- //size:字体大小
- //mode:模式 0,填充模式;1,叠加模式
- //num:数值(0~4294967295);
- void OLED_ShowNum(u8 x,u8 y,u32 num,u8 len,u8 size2)
- {
- u8 t,temp;
- u8 enshow=0;
- for(t=0;t<len;t++)
- {
- temp=(num/oled_pow(10,len-t-1))%10;
- if(enshow==0&&t<(len-1))
- {
- if(temp==0)
- {
- OLED_ShowChar(x+(size2/2)*t,y,' ');
- //OLED_ShowChar(x+(size2/2)*t,y,' ',size2);//IIC程序中的
- continue;
- }else enshow=1;
- }
- OLED_ShowChar(x+(size2/2)*t,y,temp+'0');
- }
- }
- //显示一个字符号串
- void OLED_ShowString(u8 x,u8 y,u8 *chr)
- {
- unsigned char j=0;
- while (chr[j]!='\0')
- {
- OLED_ShowChar(x,y,chr[j]);
- x+=8;
- if(x>120){x=0;y+=2;}
- j++;
- }
- }
- //显示汉字
- void OLED_ShowCHinese(u8 x,u8 y,u8 no)
- {
- u8 t,adder=0;
- OLED_Set_Pos(x,y);
- for(t=0;t<16;t++)
- {
- OLED_WR_Byte(Hzk[2*no][t],OLED_DATA);
- adder+=1;
- }
- OLED_Set_Pos(x,y+1);
- for(t=0;t<16;t++)
- {
- OLED_WR_Byte(Hzk[2*no+1][t],OLED_DATA);
- adder+=1;
- }
- }
- /***********功能描述:显示显示BMP图片128×64起始点坐标(x,y),x的范围0~127,y为页的范围0~7*****************/
- void OLED_DrawBMP(unsigned char x0, unsigned char y0,unsigned char x1, unsigned char y1,unsigned char BMP[])
- {
- unsigned int j=0;
- unsigned char x,y;
- 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_WR_Byte(BMP[j++],OLED_DATA);
- }
- }
- }
- //初始化SSD1306
- void OLED_Init(void)
- {
- //OLED_CS_Set();
- OLED_RST_Set();
- delay_ms(100);
- OLED_RST_Clr();
- delay_ms(100);
- OLED_RST_Set();
- OLED_WR_Byte(0xAE,OLED_CMD);//--turn off oled panel
- OLED_WR_Byte(0x00,OLED_CMD);//---set low column address低列地址
- OLED_WR_Byte(0x10,OLED_CMD);//---set high column address高列地址
- OLED_WR_Byte(0x40,OLED_CMD);//--set start line address Set Mapping RAM Display Start Line (0x00~0x3F)起始行地址
- OLED_WR_Byte(0x81,OLED_CMD);//--set contrast control register对比度
- OLED_WR_Byte(0xCF,OLED_CMD); // Set SEG Output Current Brightness对比度/亮度值
- OLED_WR_Byte(0xA1,OLED_CMD);//--Set SEG/Column Mapping 0xa0左右反置 0xa1正常
- OLED_WR_Byte(0xC8,OLED_CMD);//Set COM/Row Scan Direction 0xc0上下反置 0xc8正常
- OLED_WR_Byte(0xA6,OLED_CMD);//--set normal display A6:正常/A7:反相
- OLED_WR_Byte(0xA8,OLED_CMD);//--set multiplex ratio(1 to 64)驱动路数
- OLED_WR_Byte(0x3f,OLED_CMD);//--1/64 duty驱动路数值
- OLED_WR_Byte(0xD3,OLED_CMD);//-set display offset Shift Mapping RAM Counter (0x00~0x3F)设置显示偏移
- OLED_WR_Byte(0x00,OLED_CMD);//-not offset设置显示偏移值
- OLED_WR_Byte(0xd5,OLED_CMD);//--set display clock divide ratio/oscillator frequency 设置时钟分频因子,震荡频率
- OLED_WR_Byte(0x80,OLED_CMD);//--set divide ratio, Set Clock as 100 Frames/Sec
- OLED_WR_Byte(0xD9,OLED_CMD);//--set pre-charge period设置预充电周期
- OLED_WR_Byte(0xF1,OLED_CMD);//Set Pre-Charge as 15 Clocks & Discharge as 1 Clock
- OLED_WR_Byte(0xDA,OLED_CMD);//--set com pins hardware configuration设置COM硬件引脚配置
- OLED_WR_Byte(0x12,OLED_CMD);
- OLED_WR_Byte(0xDB,OLED_CMD);//--set vcomh设置VCOMH倍率
- //OLED_WR_Byte(0x30,OLED_CMD);//Set VCOM Deselect Level
- OLED_WR_Byte(0x40,OLED_CMD);//Set VCOM Deselect Level
- OLED_WR_Byte(0x20,OLED_CMD);//-Set Page Addressing Mode (0x00/0x01/0x02)设置内存地址模式
- OLED_WR_Byte(0x02,OLED_CMD);//[1:0],00,列地址模式;01,行地址模式;10,页地址模式;默认10;
- OLED_WR_Byte(0x8D,OLED_CMD);//--set Charge Pump enable/disable电荷泵设置///////////手册上没找到
- OLED_WR_Byte(0x14,OLED_CMD);//--set(0x10) disablebit2,开启/关闭
- OLED_WR_Byte(0xA4,OLED_CMD);// Disable Entire Display On (0xa4/0xa5)全局显示开启;bit0:1,开启;0,关闭;(白屏/黑屏)
- OLED_WR_Byte(0xA6,OLED_CMD);// Disable Inverse Display On (0xa6/a7) 设置显示方式;bit0:1,反相显示;0,正常显示
- OLED_WR_Byte(0xAF,OLED_CMD);//--turn on oled panel开启显示
- OLED_WR_Byte(0xAF,OLED_CMD); /*display ON*/
- OLED_Clear();
- //OLED_Set_Pos(0,0);
- }
- int main(void)
- {
- u8 t;
- system_init();
- OLED_Init();
- OLED_Clear();
- // OLED_ShowString(30,0,"OLED TEST");
- // OLED_ShowString(8,2,"ZHONGJINGYUAN");
- // OLED_ShowString(20,4,"2014/05/01");
- // OLED_ShowString(0,6,"ASCII:");
- // OLED_ShowString(63,6,"CODE:");
- // t=' ';
- while(1)
- {
- LED = 0xFF;
- PORTE &= ~(1<<PE3);
- OLED_Clear();
- OLED_ShowCHinese(0,0,0);//中
- OLED_ShowCHinese(18,0,1);//景
- OLED_ShowCHinese(36,0,2);//园
- OLED_ShowCHinese(54,0,3);//电
- OLED_ShowCHinese(72,0,4);//子
- OLED_ShowCHinese(90,0,5);//科
- OLED_ShowCHinese(108,0,6);//技
- }
- }
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