使用iic默认引脚PB6,PB7作为SCL和SDA引脚,在下拉的模式里面选择I2C1_SCL以及I2C2_SDA,在左侧的“Connectivity”中选择“I2C1,在打开的界面中点击选择“I2C”。
底层驱动,oled.c文件
#include "oled.h" #include "i2c.h" #include "oledfont.h" //头文件 uint8_t CMD_Data[]={ 0xAE, 0x00, 0x10, 0x40, 0xB0, 0x81, 0xFF, 0xA1, 0xA6, 0xA8, 0x3F, 0xC8, 0xD3, 0x00, 0xD5, 0x80, 0xD8, 0x05, 0xD9, 0xF1, 0xDA, 0x12, 0xD8, 0x30, 0x8D, 0x14, 0xAF}; //初始化命令 void WriteCmd(void) { uint8_t i = 0; for(i=0; i<27; i++) { HAL_I2C_Mem_Write(&hi2c1 ,0x78,0x00,I2C_MEMADD_SIZE_8BIT,CMD_Data+i,1,0x100); } } //向设备写控制命令 void OLED_WR_CMD(uint8_t cmd) { HAL_I2C_Mem_Write(&hi2c1 ,0x78,0x00,I2C_MEMADD_SIZE_8BIT,&cmd,1,0x100); } //向设备写数据 void OLED_WR_DATA(uint8_t data) { HAL_I2C_Mem_Write(&hi2c1 ,0x78,0x40,I2C_MEMADD_SIZE_8BIT,&data,1,0x100); } //初始化oled屏幕 void OLED_Init(void) { HAL_Delay(200); WriteCmd(); } //清屏 void OLED_Clear(void) { uint8_t i,n; for(i=0;i<8;i++) { OLED_WR_CMD(0xb0+i); OLED_WR_CMD (0x00); OLED_WR_CMD (0x10); for(n=0;n<128;n++) OLED_WR_DATA(0); } } //开启OLED显示 void OLED_Display_On(void) { OLED_WR_CMD(0X8D); //SET DCDC命令 OLED_WR_CMD(0X14); //DCDC ON OLED_WR_CMD(0XAF); //DISPLAY ON } //关闭OLED显示 void OLED_Display_Off(void) { OLED_WR_CMD(0X8D); //SET DCDC命令 OLED_WR_CMD(0X10); //DCDC OFF OLED_WR_CMD(0XAE); //DISPLAY OFF } void OLED_Set_Pos(uint8_t x, uint8_t y) { OLED_WR_CMD(0xb0+y); OLED_WR_CMD(((x&0xf0)>>4)|0x10); OLED_WR_CMD(x&0x0f); } void OLED_On(void) { uint8_t i,n; for(i=0;i<8;i++) { OLED_WR_CMD(0xb0+i); //设置页地址(0~7) OLED_WR_CMD(0x00); //设置显示位置—列低地址 OLED_WR_CMD(0x10); //设置显示位置—列高地址 for(n=0;n<128;n++) OLED_WR_DATA(1); } //更新显示 } unsigned int oled_pow(uint8_t m,uint8_t n) { unsigned int 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(uint8_t x,uint8_t y,unsigned int 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); } } //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>128-1){x=0;y=y+2;} if(Char_Size ==16) { OLED_Set_Pos(x,y); for(i=0;i<8;i++) OLED_WR_DATA(F8X16[c*16+i]); OLED_Set_Pos(x,y+1); for(i=0;i<8;i++) OLED_WR_DATA(F8X16[c*16+i+8]); } else { OLED_Set_Pos(x,y); for(i=0;i<6;i++) OLED_WR_DATA(F6x8[c][i]); } } //显示一个字符号串 void OLED_ShowString(uint8_t x,uint8_t y,uint8_t *chr,uint8_t Char_Size) { unsigned char j=0; while (chr[j]!='