- void wk_i2c2_init(void)
- {
- /* add user code begin i2c2_init 0 */
- /* add user code end i2c2_init 0 */
- gpio_init_type gpio_init_struct;
- gpio_default_para_init(&gpio_init_struct);
- /* add user code begin i2c2_init 1 */
- /* add user code end i2c2_init 1 */
- /* configure the SCL pin */
- gpio_init_struct.gpio_out_type = GPIO_OUTPUT_OPEN_DRAIN;
- gpio_init_struct.gpio_pull = GPIO_PULL_NONE;
- gpio_init_struct.gpio_mode = GPIO_MODE_MUX;
- gpio_init_struct.gpio_drive_strength = GPIO_DRIVE_STRENGTH_MODERATE;
- gpio_init_struct.gpio_pins = SCL_PIN;
- gpio_init(SCL_GPIO_PORT, &gpio_init_struct);
- gpio_pin_mux_config(SCL_GPIO_PORT, GPIO_PINS_SOURCE0, GPIO_MUX_4);
- /* configure the SDA pin */
- gpio_init_struct.gpio_out_type = GPIO_OUTPUT_OPEN_DRAIN;
- gpio_init_struct.gpio_pull = GPIO_PULL_NONE;
- gpio_init_struct.gpio_mode = GPIO_MODE_MUX;
- gpio_init_struct.gpio_drive_strength = GPIO_DRIVE_STRENGTH_MODERATE;
- gpio_init_struct.gpio_pins = SDA_PIN;
- gpio_init(SDA_GPIO_PORT, &gpio_init_struct);
- gpio_pin_mux_config(SDA_GPIO_PORT, GPIO_PINS_SOURCE1, GPIO_MUX_4);
- i2c_init(I2C2, 0, 0x30D08080);
- i2c_own_address1_set(I2C2, I2C_ADDRESS_MODE_7BIT, 0x0);
- i2c_ack_enable(I2C2, TRUE);
- i2c_clock_stretch_enable(I2C2, TRUE);
- i2c_general_call_enable(I2C2, FALSE);
- i2c_enable(I2C2, TRUE);
- /* add user code begin i2c2_init 2 */
- /* add user code end i2c2_init 2 */
- }
我们只需要修改Write_IIC_Byte,Write_IIC_Data,Write_IIC_Command函数即可
- void Write_IIC_Byte(uint8_t IIC_Byte)
- {
- i2c_status_type i2c_status;
- uint8_t buff[2] = {0};
- buff[0] = IIC_Byte;
- i2c_status = i2c_master_transmit(&hi2cx, I2Cx_ADDRESS, buff, 1, 1000);
- if(i2c_status != I2C_OK)
- {
- printf("erro send %d",i2c_status);
- }
- }
- //==================================================================================================
- // 函数功能: IIC外设驱动函数部分
- // 函数标记: Write_IIC_Command
- // 函数说明: 无
- void Write_IIC_Command(uint8_t IIC_Command)
- {
- i2c_status_type i2c_status;
- uint8_t buff[2] = {0};
- buff[0] = 0x00;
- buff[1] = IIC_Command;
- i2c_status = i2c_master_transmit(&hi2cx, I2Cx_ADDRESS, buff, 2, 1000);
- if(i2c_status != I2C_OK)
- {
- printf("erro send %d",i2c_status);
- }
- }
- //==================================================================================================
- // 函数功能: IIC外设驱动函数部分
- // 函数标记: Write_IIC_Data
- // 函数说明: 无
- void Write_IIC_Data(uint8_t IIC_Data)
- {
- i2c_status_type i2c_status;
- uint8_t buff[2] = {0};
- buff[0] = 0x40;
- buff[1] = IIC_Data;
- i2c_status = i2c_master_transmit(&hi2cx, I2Cx_ADDRESS, buff, 2, 1000);
- if(i2c_status != I2C_OK)
- {
- printf("erro send %d",i2c_status);
- }
- }
之后初始化OLED
- <blockquote>static void i2c_config_init(void)
OLED的数字,字符,字符串以及汉字等的驱动函数保持不变
- void OLED_Set_Pos(unsigned char x, unsigned char y)
- { OLED_WR_Byte(0xb0+y,OLED_CMD);
- OLED_WR_Byte(((x&0xf0)>>4)|0x10,OLED_CMD);
- OLED_WR_Byte((x&0x0f),OLED_CMD);
- }
- //开启OLED显示
- void OLED_Display_On(void)
- {
- OLED_WR_Byte(0X8D,OLED_CMD); //SET DCDC命令
- OLED_WR_Byte(0X14,OLED_CMD); //DCDC ON
- OLED_WR_Byte(0XAF,OLED_CMD); //DISPLAY ON
- }
- //关闭OLED显示
- void OLED_Display_Off(void)
- {
- OLED_WR_Byte(0X8D,OLED_CMD); //SET DCDC命令
- OLED_WR_Byte(0X10,OLED_CMD); //DCDC OFF
- OLED_WR_Byte(0XAE,OLED_CMD); //DISPLAY OFF
- }
- //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)
- {
- uint8_t 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
- }
- void OLED_On(void)
- {
- uint8_t 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(1,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(uint8_t x,uint8_t y,uint8_t chr,uint8_t Char_Size)
- {
- 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(Char_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);
- for(i=0;i<6;i++)
- OLED_WR_Byte(F6x8[c][i],OLED_DATA);
-
- }
- }
- //m^n函数
- uint32_t oled_pow(uint8_t m,uint8_t n)
- {
- uint32_t 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_ShowNumber(uint8_t x,uint8_t y,uint32_t num,uint8_t len,uint8_t size2)
- {
- uint8_t t,temp;
- uint8_t 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,' ',size2);
- continue;
- }else enshow=1;
-
- }
- OLED_ShowChar(x+(size2/2)*t,y,temp+'0',size2);
- }
- }
- //显示一个字符号串
- void OLED_ShowString(uint8_t x,uint8_t y,uint8_t *chr,uint8_t Char_Size)
- {
- while (*chr!='\0')
- { OLED_ShowChar(x,y,*chr,Char_Size);
- x+=8;
- if(x>120){x=0;y+=2;}
- chr++;
- }
- }
- //显示汉字
- void OLED_ShowCHinese(uint8_t x,uint8_t y,uint8_t no)
- {
- uint8_t 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);
- }
- }
- }
- void OLED_Float(unsigned char Y,unsigned char X,double real,unsigned char N)
- {
- unsigned char i_Count=1;
- unsigned char n[12]={0};
- long j=1;
- int real_int=0;
- double decimal=0;
- unsigned int real_decimal=0;
- if(real<0)
- {
- real_int=(int)(-real);
- }
- else
- {
- real_int=(int)real;
- }
- decimal=real-real_int;
- real_decimal=decimal*1e4;
- while(real_int/10/j!=0)
- {
- j=j*10;i_Count++;
- }
- n[0]=(real_int/10000)%10;
- n[1]=(real_int/1000)%10;
- n[2]=(real_int/100)%10;
- n[3]=(real_int/10)%10;
- n[4]=(real_int/1)%10;
- n[5]='.';
- n[6]=(real_decimal/1000)%10;
- n[7]=(real_decimal/100)%10;
- n[8]=(real_decimal/10)%10;
- n[9]=real_decimal%10;
- n[6+N]='\0';
- for(j=0;j<10;j++) n[j]=n[j]+16+32;
- if(real<0)
- {
- i_Count+=1;
- n[5-i_Count]='-';
- }
- n[5]='.';
- n[6+N]='\0';
- OLED_ShowString(X,Y,&n[5-i_Count],12);
- }
- void OLED_Float2(unsigned char Y,unsigned char X,double real,unsigned char N1,unsigned char N2)
- {
- unsigned char i_Count=1;
- unsigned char n[12]={0};
- long j=1;
- unsigned int real_int=0;
- double decimal=0;
- unsigned int real_decimal=0;
- X=X*8;
- real_int=(int)real;
- //Dis_Num(2,0,real_int,5);
- decimal=real-real_int;
- real_decimal=decimal*1e4;
- //Dis_Num(2,6,real_decimal,4);
- while(real_int/10/j!=0)
- {
- j=j*10;i_Count++;
- }
- n[0]=(real_int/10000)%10;
- n[1]=(real_int/1000)%10;
- n[2]=(real_int/100)%10;
- n[3]=(real_int/10)%10;
-
- n[5]='.';
- n[6]=(real_decimal/1000)%10;
- n[7]=(real_decimal/100)%10;
- n[8]=(real_decimal/10)%10;
- n[9]=real_decimal%10;
- n[6+N2]='\0';
- for(j=0;j<10;j++) n[j]=n[j]+16+32;
- n[5]='.';
- n[6+N2]='\0';
- OLED_ShowString(X,Y,&n[5-N1],12);
- }
- void OLED_Num2(unsigned char x,unsigned char y, int number)
- {
- unsigned char shi,ge;
- int num =number;
- if(num<0)
- {
- num=-num;
- shi=num%100/10;
- ge=num%10;
- OLED_fuhao_write(x,y,13);
- OLED_Num_write(x+1,y,shi);
- OLED_Num_write(x+2,y,ge);
- }
- else
- {
- shi=num%100/10;
- ge=num%10;
- OLED_fuhao_write(x,y,11);
- OLED_Num_write(x+1,y,shi);
- OLED_Num_write(x+2,y,ge);
- }
-
- }
- void OLED_Num3(unsigned char x,unsigned char y,int number)
- {
- unsigned char ge,shi,bai;
- int num =number;
- if(num<0)
- {
- num=-num;
- OLED_fuhao_write(x,y,13); //显示-号
- ge = num %10;
- shi = num/10%10;
- bai = num/100;
- OLED_Num_write(x+3,y,ge);
- OLED_Num_write(x+2,y,shi);
- OLED_Num_write(x+1,y,bai);
- }
- else
- {
- OLED_fuhao_write(x,y,11);
- ge = num %10;
- shi = num/10 %10;
- bai = num/100;
- OLED_Num_write(x+3,y,ge);
- OLED_Num_write(x+2,y,shi);
- OLED_Num_write(x+1,y,bai);
- }
- }
- void OLED_Num4(unsigned char x,unsigned char y, int number)
- {
- unsigned char qian,bai,shi,ge;
- int num =number;
- if(num<0)
- {
- num=-num;
- }
- qian=num/1000;
- bai=num%1000/100;
- shi=num%100/10;
- ge=num%10;
- OLED_Num_write(x,y,qian);
- OLED_Num_write(x+1,y,bai);
- OLED_Num_write(x+2,y,shi);
- OLED_Num_write(x+3,y,ge);
- }
- void OLED_Num_write(unsigned char x,unsigned char y,unsigned char asc)
- {
- int i=0;
- OLED_Set_Pos(x*6,y);
- for(i=0;i<6;i++)
- {
- OLED_WR_Byte(F6x8[asc+16][i],OLED_DATA);
- }
- }
- void OLED_fuhao_write(unsigned char x,unsigned char y,unsigned char asc)
- {
- int i=0;
- OLED_Set_Pos(x*6,y);
- for(i=0;i<6;i++)
- {
- OLED_WR_Byte(F6x8[asc][i],OLED_DATA);
- }
-
- }
- void OLED_Num5(unsigned char x,unsigned char y,unsigned int number)
- {
- unsigned char wan,qian,bai,shi,ge;
- wan=number/10000;
- qian = number%10000/1000;
- bai=number%1000/100;
- shi=number%100/10;
- ge=number%10;
- OLED_Num_write(x,y,wan);
- OLED_Num_write(x+1,y,qian);
- OLED_Num_write(x+2,y,bai);
- OLED_Num_write(x+3,y,shi);
- OLED_Num_write(x+4,y,ge);
- }
之后在主函数添加必要的头文件和OLED_Init();OLED_Clear()函数,显示内容如下
- OLED_ShowCHinese(0,2,0);
- OLED_ShowCHinese(27,2,1);
- OLED_ShowCHinese(55,2,2);
- OLED_ShowCHinese(83,2,3);
- OLED_ShowCHinese(111,2,4);
- OLED_ShowCHinese(23,0,5);
- OLED_ShowCHinese(39,0,6);
- OLED_ShowCHinese(55,0,7);
- OLED_ShowCHinese(71,0,8);
- OLED_ShowCHinese(87,0,9);
- OLED_ShowString(8,4,"AT32F405RCT7-7",16);
- OLED_ShowString(31,6,"OLED",16);
- OLED_ShowCHinese(64,6,10);
- OLED_ShowCHinese(80,6,11);
实验效果如图所示,拍照时会有频闪的问题,可能是硬件IIC的刷新率比较快,下一篇将制作动画来比较软件IIC和硬件IIC的刷新效果