【瑞萨RA4系列开发板体验】OLED电压表

前面有大佬驱动OLED，但是有点小问题，我这里解决了。
【学习资料】
1、【瑞萨RA4系列开发板体验】硬件iic点亮oled屏幕 - 瑞萨单片机论坛 - 电子技术论坛 - 广受欢迎的专业电子论坛! (elecfans.com)
2、(76条消息) 瑞萨e2studio(17)----IIC，12864OLED移植_记帖的博客-CSDN博客
【实现步骤】
在前面ADC的基础上增加OLED模块
1、打开配置工具，添加i2c_master

2、按下图设置：

3、按下面配置管脚：

4、同步生成工程，回到keil。
5、新建oled.c,oled.h,oledfont.h并加入到工程中：

具体函数内容如下：
oled.c：

#include "oled.h"
#include "stdlib.h"
#include "oledfont.h"

#include "hal_data.h"
fsp_err_t err;
int  timeout_ms = 1000;
i2c_master_event_t i2c_event ;
//OLED的显存
//存放格式如下.
//[0]0 1 2 3 ... 127
//[1]0 1 2 3 ... 127
//[2]0 1 2 3 ... 127
//[3]0 1 2 3 ... 127
//[4]0 1 2 3 ... 127
//[5]0 1 2 3 ... 127
//[6]0 1 2 3 ... 127
//[7]0 1 2 3 ... 127
void IIC_Master_callback(i2c_master_callback_args_t *p_args)
{
    i2c_event = I2C_MASTER_EVENT_ABORTED;
    if (NULL != p_args)
    {
        /* capture callback event for validating the i2c transfer event*/
        i2c_event = p_args->event;
    }
}

/**********************************************
// IIC Write Command
**********************************************/
void Write_IIC_Command(unsigned char IIC_Command)
{
    uint8_t ii[2]={0x00,0x00};            
    ii[1]=IIC_Command;            
    err = R_IIC_MASTER_Write(&g_i2c_master0_ctrl, ii, 0x02, true);
    assert(FSP_SUCCESS == err);            
    /* Since there is nothing else to do, block until Callback triggers*/
    while ((I2C_MASTER_EVENT_TX_COMPLETE != i2c_event) && timeout_ms>0)
    {                    
        R_BSP_SoftwareDelay(1U, BSP_DELAY_UNITS_MICROSECONDS);
        timeout_ms--;            
    }            
    if (I2C_MASTER_EVENT_ABORTED == i2c_event)            
    {                    
        __BKPT(0);            
    }            
    /* Read data back from the I2C slave */            
    i2c_event = I2C_MASTER_EVENT_ABORTED;            
    timeout_ms           = 1000;    
}

/**********************************************
// IIC Write Data
**********************************************/
void Write_IIC_Data(unsigned char IIC_Data)
{
    uint8_t ii[2]={0x40,0x00};
    ii[0] = 0x40;
    ii[1]=IIC_Data;
    err = R_IIC_MASTER_Write(&g_i2c_master0_ctrl, ii, 0x02, true);

    assert(FSP_SUCCESS == err);            
    /* Since there is nothing else to do, block until Callback triggers*/            
    while ((I2C_MASTER_EVENT_TX_COMPLETE != i2c_event) && timeout_ms>0)            
    {                    
        R_BSP_SoftwareDelay(1U, BSP_DELAY_UNITS_MICROSECONDS);                    
        timeout_ms--;
    }
   if (I2C_MASTER_EVENT_ABORTED == i2c_event)
   {
       __BKPT(0);
   }
   /* Read data back from the I2C slave */
   i2c_event = I2C_MASTER_EVENT_ABORTED;
   timeout_ms           = 1000;
}

static void OLED_WR_Byte(unsigned char dat,unsigned char cmd)
{
    if(cmd)
    {
        Write_IIC_Data(dat);
    }
    else 
    {
        Write_IIC_Command(dat);
    }
}





//坐标设置

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)
{
    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
}
void OLED_On(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(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(u8 x,u8 y,u8 chr,u8 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
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,' ',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(u8 x,u8 y,u8 *chr,u8 Char_Size)
{
    unsigned char j=0;
    while (chr[j]!='\0')
    {       OLED_ShowChar(x,y,chr[j],Char_Size);
            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)
{
    /* Wait for minimum time required between transfers. */
    //R_BSP_SoftwareDelay(800, BSP_DELAY_UNITS_MICROSECONDS);
    err = R_IIC_MASTER_Open(&g_i2c_master0_ctrl, &g_i2c_master0_cfg);
    assert(FSP_SUCCESS == err);
    R_BSP_SoftwareDelay(500, BSP_DELAY_UNITS_MILLISECONDS); // NOLINT 

    OLED_WR_Byte(0xAE,OLED_CMD);//--display off
    OLED_WR_Byte(0x00,OLED_CMD);//---set low column address
    OLED_WR_Byte(0x10,OLED_CMD);//---set high column address
    OLED_WR_Byte(0x40,OLED_CMD);//--set start line address
    OLED_WR_Byte(0xB0,OLED_CMD);//--set page address
    OLED_WR_Byte(0x81,OLED_CMD); // contract control
    OLED_WR_Byte(0xFF,OLED_CMD);//--128
    OLED_WR_Byte(0xA1,OLED_CMD);//set segment remap
    OLED_WR_Byte(0xA6,OLED_CMD);//--normal / reverse
    OLED_WR_Byte(0xA8,OLED_CMD);//--set multiplex ratio(1 to 64)
    OLED_WR_Byte(0x3F,OLED_CMD);//--1/32 duty
    OLED_WR_Byte(0xC8,OLED_CMD);//Com scan direction
    OLED_WR_Byte(0xD3,OLED_CMD);//-set display offset
    OLED_WR_Byte(0x00,OLED_CMD);//

    OLED_WR_Byte(0xD5,OLED_CMD);//set osc division
    OLED_WR_Byte(0x80,OLED_CMD);//

    OLED_WR_Byte(0xD8,OLED_CMD);//set area color mode off
    OLED_WR_Byte(0x05,OLED_CMD);//

    OLED_WR_Byte(0xD9,OLED_CMD);//Set Pre-Charge Period
    OLED_WR_Byte(0xF1,OLED_CMD);//

    OLED_WR_Byte(0xDA,OLED_CMD);//set com pin configuartion
    OLED_WR_Byte(0x12,OLED_CMD);//

    OLED_WR_Byte(0xDB,OLED_CMD);//set Vcomh
    OLED_WR_Byte(0x30,OLED_CMD);//

    OLED_WR_Byte(0x8D,OLED_CMD);//set charge pump enable
    OLED_WR_Byte(0x14,OLED_CMD);//

    OLED_WR_Byte(0xAF,OLED_CMD);//--turn on oled panel
}

oled.h

#ifndef OLED_H_
#define OLED_H_
#include "stdint.h"

typedef unsigned char u8;
typedef unsigned short int u16;
typedef unsigned int u32;


#define OLED_MODE 0
#define SIZE 8
#define XLevelL		0x00
#define XLevelH		0x10
#define Max_Column	128
#define Max_Row		64
#define	Brightness	0xFF 
#define X_WIDTH 	128
#define Y_WIDTH 	64
#define OLED_CMD  0	//写命令
#define OLED_DATA 1	//写数据


void WriteCmd(void);
void OLED_WR_CMD(uint8_t cmd);
void OLED_WR_DATA(uint8_t data);
void OLED_Init(void);
void OLED_Clear(void);
void OLED_Display_On(void);
void OLED_Display_Off(void);
void OLED_Set_Pos(uint8_t x, uint8_t y);
void OLED_On(void);
void OLED_ShowNum(uint8_t x,uint8_t y,unsigned int num,uint8_t len,uint8_t size2);
void OLED_ShowChar(uint8_t x,uint8_t y,uint8_t chr,uint8_t Char_Size);
void OLED_ShowString(uint8_t x,uint8_t y,uint8_t *chr,uint8_t Char_Size);
void OLED_ShowCHinese(uint8_t x,uint8_t y,uint8_t no);
void OLED_DrawBMP(unsigned char x0,unsigned char y0,unsigned char x1,unsigned char y1,unsigned char BMP[]);
#endif

oledfont.h:

#ifndef OLEDFONT_H_
#define OLEDFONT_H_
#include "stdint.h"

//8*6 ASCII字符集点阵
const unsigned char F6x8[][6] =
{
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00,// sp
    0x00, 0x00, 0x00, 0x2f, 0x00, 0x00,// !
    0x00, 0x00, 0x07, 0x00, 0x07, 0x00,// "
    0x00, 0x14, 0x7f, 0x14, 0x7f, 0x14,// #
    0x00, 0x24, 0x2a, 0x7f, 0x2a, 0x12,// $
    0x00, 0x62, 0x64, 0x08, 0x13, 0x23,// %
    0x00, 0x36, 0x49, 0x55, 0x22, 0x50,// &
    0x00, 0x00, 0x05, 0x03, 0x00, 0x00,// '
    0x00, 0x00, 0x1c, 0x22, 0x41, 0x00,// (
    0x00, 0x00, 0x41, 0x22, 0x1c, 0x00,// )
    0x00, 0x14, 0x08, 0x3E, 0x08, 0x14,// *
    0x00, 0x08, 0x08, 0x3E, 0x08, 0x08,// +
    0x00, 0x00, 0x00, 0xA0, 0x60, 0x00,// ,
    0x00, 0x08, 0x08, 0x08, 0x08, 0x08,// -
    0x00, 0x00, 0x60, 0x60, 0x00, 0x00,// .
    0x00, 0x20, 0x10, 0x08, 0x04, 0x02,// /
    0x00, 0x3E, 0x51, 0x49, 0x45, 0x3E,// 0
    0x00, 0x00, 0x42, 0x7F, 0x40, 0x00,// 1
    0x00, 0x42, 0x61, 0x51, 0x49, 0x46,// 2
    0x00, 0x21, 0x41, 0x45, 0x4B, 0x31,// 3
    0x00, 0x18, 0x14, 0x12, 0x7F, 0x10,// 4
    0x00, 0x27, 0x45, 0x45, 0x45, 0x39,// 5
    0x00, 0x3C, 0x4A, 0x49, 0x49, 0x30,// 6
    0x00, 0x01, 0x71, 0x09, 0x05, 0x03,// 7
    0x00, 0x36, 0x49, 0x49, 0x49, 0x36,// 8
    0x00, 0x06, 0x49, 0x49, 0x29, 0x1E,// 9
    0x00, 0x00, 0x36, 0x36, 0x00, 0x00,// :
    0x00, 0x00, 0x56, 0x36, 0x00, 0x00,// ;
    0x00, 0x08, 0x14, 0x22, 0x41, 0x00,// <
    0x00, 0x14, 0x14, 0x14, 0x14, 0x14,// =
    0x00, 0x00, 0x41, 0x22, 0x14, 0x08,// >
    0x00, 0x02, 0x01, 0x51, 0x09, 0x06,// ?
    0x00, 0x32, 0x49, 0x59, 0x51, 0x3E,// @
    0x00, 0x7C, 0x12, 0x11, 0x12, 0x7C,// A
    0x00, 0x7F, 0x49, 0x49, 0x49, 0x36,// B
    0x00, 0x3E, 0x41, 0x41, 0x41, 0x22,// C
    0x00, 0x7F, 0x41, 0x41, 0x22, 0x1C,// D
    0x00, 0x7F, 0x49, 0x49, 0x49, 0x41,// E
    0x00, 0x7F, 0x09, 0x09, 0x09, 0x01,// F
    0x00, 0x3E, 0x41, 0x49, 0x49, 0x7A,// G
    0x00, 0x7F, 0x08, 0x08, 0x08, 0x7F,// H
    0x00, 0x00, 0x41, 0x7F, 0x41, 0x00,// I
    0x00, 0x20, 0x40, 0x41, 0x3F, 0x01,// J
    0x00, 0x7F, 0x08, 0x14, 0x22, 0x41,// K
    0x00, 0x7F, 0x40, 0x40, 0x40, 0x40,// L
    0x00, 0x7F, 0x02, 0x0C, 0x02, 0x7F,// M
    0x00, 0x7F, 0x04, 0x08, 0x10, 0x7F,// N
    0x00, 0x3E, 0x41, 0x41, 0x41, 0x3E,// O
    0x00, 0x7F, 0x09, 0x09, 0x09, 0x06,// P
    0x00, 0x3E, 0x41, 0x51, 0x21, 0x5E,// Q
    0x00, 0x7F, 0x09, 0x19, 0x29, 0x46,// R
    0x00, 0x46, 0x49, 0x49, 0x49, 0x31,// S
    0x00, 0x01, 0x01, 0x7F, 0x01, 0x01,// T
    0x00, 0x3F, 0x40, 0x40, 0x40, 0x3F,// U
    0x00, 0x1F, 0x20, 0x40, 0x20, 0x1F,// V
    0x00, 0x3F, 0x40, 0x38, 0x40, 0x3F,// W
    0x00, 0x63, 0x14, 0x08, 0x14, 0x63,// X
    0x00, 0x07, 0x08, 0x70, 0x08, 0x07,// Y
    0x00, 0x61, 0x51, 0x49, 0x45, 0x43,// Z
    0x00, 0x00, 0x7F, 0x41, 0x41, 0x00,// [
    0x00, 0x55, 0x2A, 0x55, 0x2A, 0x55,// 55
    0x00, 0x00, 0x41, 0x41, 0x7F, 0x00,// ]
    0x00, 0x04, 0x02, 0x01, 0x02, 0x04,// ^
    0x00, 0x40, 0x40, 0x40, 0x40, 0x40,// _
    0x00, 0x00, 0x01, 0x02, 0x04, 0x00,// '
    0x00, 0x20, 0x54, 0x54, 0x54, 0x78,// a
    0x00, 0x7F, 0x48, 0x44, 0x44, 0x38,// b
    0x00, 0x38, 0x44, 0x44, 0x44, 0x20,// c
    0x00, 0x38, 0x44, 0x44, 0x48, 0x7F,// d
    0x00, 0x38, 0x54, 0x54, 0x54, 0x18,// e
    0x00, 0x08, 0x7E, 0x09, 0x01, 0x02,// f
    0x00, 0x18, 0xA4, 0xA4, 0xA4, 0x7C,// g
    0x00, 0x7F, 0x08, 0x04, 0x04, 0x78,// h
    0x00, 0x00, 0x44, 0x7D, 0x40, 0x00,// i
    0x00, 0x40, 0x80, 0x84, 0x7D, 0x00,// j
    0x00, 0x7F, 0x10, 0x28, 0x44, 0x00,// k
    0x00, 0x00, 0x41, 0x7F, 0x40, 0x00,// l
    0x00, 0x7C, 0x04, 0x18, 0x04, 0x78,// m
    0x00, 0x7C, 0x08, 0x04, 0x04, 0x78,// n
    0x00, 0x38, 0x44, 0x44, 0x44, 0x38,// o
    0x00, 0xFC, 0x24, 0x24, 0x24, 0x18,// p
    0x00, 0x18, 0x24, 0x24, 0x18, 0xFC,// q
    0x00, 0x7C, 0x08, 0x04, 0x04, 0x08,// r
    0x00, 0x48, 0x54, 0x54, 0x54, 0x20,// s
    0x00, 0x04, 0x3F, 0x44, 0x40, 0x20,// t
    0x00, 0x3C, 0x40, 0x40, 0x20, 0x7C,// u
    0x00, 0x1C, 0x20, 0x40, 0x20, 0x1C,// v
    0x00, 0x3C, 0x40, 0x30, 0x40, 0x3C,// w
    0x00, 0x44, 0x28, 0x10, 0x28, 0x44,// x
    0x00, 0x1C, 0xA0, 0xA0, 0xA0, 0x7C,// y
    0x00, 0x44, 0x64, 0x54, 0x4C, 0x44,// z
    0x14, 0x14, 0x14, 0x14, 0x14, 0x14,// horiz lines
};

//16*8 ASCII字符集点阵
const unsigned char F8X16[]=
{
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//sp /0
 0x00,0x00,0x00,0xF8,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x33,0x30,0x00,0x00,0x00,//!  /1
 0x00,0x10,0x0C,0x06,0x10,0x0C,0x06,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//"  /2
 0x40,0xC0,0x78,0x40,0xC0,0x78,0x40,0x00,0x04,0x3F,0x04,0x04,0x3F,0x04,0x04,0x00,//#  /3
 0x00,0x70,0x88,0xFC,0x08,0x30,0x00,0x00,0x00,0x18,0x20,0xFF,0x21,0x1E,0x00,0x00,//$  /4
 0xF0,0x08,0xF0,0x00,0xE0,0x18,0x00,0x00,0x00,0x21,0x1C,0x03,0x1E,0x21,0x1E,0x00,//%  /5
 0x00,0xF0,0x08,0x88,0x70,0x00,0x00,0x00,0x1E,0x21,0x23,0x24,0x19,0x27,0x21,0x10,//&  /6
 0x10,0x16,0x0E,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//'  /7
 0x00,0x00,0x00,0xE0,0x18,0x04,0x02,0x00,0x00,0x00,0x00,0x07,0x18,0x20,0x40,0x00,//(  /8
 0x00,0x02,0x04,0x18,0xE0,0x00,0x00,0x00,0x00,0x40,0x20,0x18,0x07,0x00,0x00,0x00,//)  /9
 0x40,0x40,0x80,0xF0,0x80,0x40,0x40,0x00,0x02,0x02,0x01,0x0F,0x01,0x02,0x02,0x00,//*  /10
 0x00,0x00,0x00,0xF0,0x00,0x00,0x00,0x00,0x01,0x01,0x01,0x1F,0x01,0x01,0x01,0x00,//+  /11
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0xB0,0x70,0x00,0x00,0x00,0x00,0x00,//,  /12
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x01,0x01,0x01,0x01,0x01,0x01,//-  /13
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x30,0x30,0x00,0x00,0x00,0x00,0x00,//.  /14
 0x00,0x00,0x00,0x00,0x80,0x60,0x18,0x04,0x00,0x60,0x18,0x06,0x01,0x00,0x00,0x00,///  /15
 0x00,0xE0,0x10,0x08,0x08,0x10,0xE0,0x00,0x00,0x0F,0x10,0x20,0x20,0x10,0x0F,0x00,//0  /16
 0x00,0x10,0x10,0xF8,0x00,0x00,0x00,0x00,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//1  /17
 0x00,0x70,0x08,0x08,0x08,0x88,0x70,0x00,0x00,0x30,0x28,0x24,0x22,0x21,0x30,0x00,//2  /18
 0x00,0x30,0x08,0x88,0x88,0x48,0x30,0x00,0x00,0x18,0x20,0x20,0x20,0x11,0x0E,0x00,//3  /19
 0x00,0x00,0xC0,0x20,0x10,0xF8,0x00,0x00,0x00,0x07,0x04,0x24,0x24,0x3F,0x24,0x00,//4  /20
 0x00,0xF8,0x08,0x88,0x88,0x08,0x08,0x00,0x00,0x19,0x21,0x20,0x20,0x11,0x0E,0x00,//5  /21
 0x00,0xE0,0x10,0x88,0x88,0x18,0x00,0x00,0x00,0x0F,0x11,0x20,0x20,0x11,0x0E,0x00,//6  /22
 0x00,0x38,0x08,0x08,0xC8,0x38,0x08,0x00,0x00,0x00,0x00,0x3F,0x00,0x00,0x00,0x00,//7  /23
 0x00,0x70,0x88,0x08,0x08,0x88,0x70,0x00,0x00,0x1C,0x22,0x21,0x21,0x22,0x1C,0x00,//8  /24
 0x00,0xE0,0x10,0x08,0x08,0x10,0xE0,0x00,0x00,0x00,0x31,0x22,0x22,0x11,0x0F,0x00,//9  /25
 0x00,0x00,0x00,0xC0,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x30,0x30,0x00,0x00,0x00,//:  /26
 0x00,0x00,0x00,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0x60,0x00,0x00,0x00,0x00,//;  /27
 0x00,0x00,0x80,0x40,0x20,0x10,0x08,0x00,0x00,0x01,0x02,0x04,0x08,0x10,0x20,0x00,//<  /28
 0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x00,0x04,0x04,0x04,0x04,0x04,0x04,0x04,0x00,//=  /29
 0x00,0x08,0x10,0x20,0x40,0x80,0x00,0x00,0x00,0x20,0x10,0x08,0x04,0x02,0x01,0x00,//>  /30
 0x00,0x70,0x48,0x08,0x08,0x08,0xF0,0x00,0x00,0x00,0x00,0x30,0x36,0x01,0x00,0x00,//?  /31
 0xC0,0x30,0xC8,0x28,0xE8,0x10,0xE0,0x00,0x07,0x18,0x27,0x24,0x23,0x14,0x0B,0x00,//@  /32
 0x00,0x00,0xC0,0x38,0xE0,0x00,0x00,0x00,0x20,0x3C,0x23,0x02,0x02,0x27,0x38,0x20,//A  /33
 0x08,0xF8,0x88,0x88,0x88,0x70,0x00,0x00,0x20,0x3F,0x20,0x20,0x20,0x11,0x0E,0x00,//B  /34
 0xC0,0x30,0x08,0x08,0x08,0x08,0x38,0x00,0x07,0x18,0x20,0x20,0x20,0x10,0x08,0x00,//C  /35
 0x08,0xF8,0x08,0x08,0x08,0x10,0xE0,0x00,0x20,0x3F,0x20,0x20,0x20,0x10,0x0F,0x00,//D  /36
 0x08,0xF8,0x88,0x88,0xE8,0x08,0x10,0x00,0x20,0x3F,0x20,0x20,0x23,0x20,0x18,0x00,//E  /37
 0x08,0xF8,0x88,0x88,0xE8,0x08,0x10,0x00,0x20,0x3F,0x20,0x00,0x03,0x00,0x00,0x00,//F  /38
 0xC0,0x30,0x08,0x08,0x08,0x38,0x00,0x00,0x07,0x18,0x20,0x20,0x22,0x1E,0x02,0x00,//G  /39
 0x08,0xF8,0x08,0x00,0x00,0x08,0xF8,0x08,0x20,0x3F,0x21,0x01,0x01,0x21,0x3F,0x20,//H  /40
 0x00,0x08,0x08,0xF8,0x08,0x08,0x00,0x00,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//I  /41
 0x00,0x00,0x08,0x08,0xF8,0x08,0x08,0x00,0xC0,0x80,0x80,0x80,0x7F,0x00,0x00,0x00,//J  /42
 0x08,0xF8,0x88,0xC0,0x28,0x18,0x08,0x00,0x20,0x3F,0x20,0x01,0x26,0x38,0x20,0x00,//K  /43
 0x08,0xF8,0x08,0x00,0x00,0x00,0x00,0x00,0x20,0x3F,0x20,0x20,0x20,0x20,0x30,0x00,//L  /44
 0x08,0xF8,0xF8,0x00,0xF8,0xF8,0x08,0x00,0x20,0x3F,0x00,0x3F,0x00,0x3F,0x20,0x00,//M  /45
 0x08,0xF8,0x30,0xC0,0x00,0x08,0xF8,0x08,0x20,0x3F,0x20,0x00,0x07,0x18,0x3F,0x00,//N  /46
 0xE0,0x10,0x08,0x08,0x08,0x10,0xE0,0x00,0x0F,0x10,0x20,0x20,0x20,0x10,0x0F,0x00,//O  /47
 0x08,0xF8,0x08,0x08,0x08,0x08,0xF0,0x00,0x20,0x3F,0x21,0x01,0x01,0x01,0x00,0x00,//P  /48
 0xE0,0x10,0x08,0x08,0x08,0x10,0xE0,0x00,0x0F,0x18,0x24,0x24,0x38,0x50,0x4F,0x00,//Q  /49
 0x08,0xF8,0x88,0x88,0x88,0x88,0x70,0x00,0x20,0x3F,0x20,0x00,0x03,0x0C,0x30,0x20,//R  /50
 0x00,0x70,0x88,0x08,0x08,0x08,0x38,0x00,0x00,0x38,0x20,0x21,0x21,0x22,0x1C,0x00,//S  /51
 0x18,0x08,0x08,0xF8,0x08,0x08,0x18,0x00,0x00,0x00,0x20,0x3F,0x20,0x00,0x00,0x00,//T  /52
 0x08,0xF8,0x08,0x00,0x00,0x08,0xF8,0x08,0x00,0x1F,0x20,0x20,0x20,0x20,0x1F,0x00,//U  /53
 0x08,0x78,0x88,0x00,0x00,0xC8,0x38,0x08,0x00,0x00,0x07,0x38,0x0E,0x01,0x00,0x00,//V  /54
 0xF8,0x08,0x00,0xF8,0x00,0x08,0xF8,0x00,0x03,0x3C,0x07,0x00,0x07,0x3C,0x03,0x00,//W  /55
 0x08,0x18,0x68,0x80,0x80,0x68,0x18,0x08,0x20,0x30,0x2C,0x03,0x03,0x2C,0x30,0x20,//X  /56
 0x08,0x38,0xC8,0x00,0xC8,0x38,0x08,0x00,0x00,0x00,0x20,0x3F,0x20,0x00,0x00,0x00,//Y  /57
 0x10,0x08,0x08,0x08,0xC8,0x38,0x08,0x00,0x20,0x38,0x26,0x21,0x20,0x20,0x18,0x00,//Z  /58
 0x00,0x00,0x00,0xFE,0x02,0x02,0x02,0x00,0x00,0x00,0x00,0x7F,0x40,0x40,0x40,0x00,//[  /59
 0x00,0x0C,0x30,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x06,0x38,0xC0,0x00,//\  /60
 0x00,0x02,0x02,0x02,0xFE,0x00,0x00,0x00,0x00,0x40,0x40,0x40,0x7F,0x00,0x00,0x00,//]  /61
 0x00,0x00,0x04,0x02,0x02,0x02,0x04,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//^  /62
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,//_  /63
 0x00,0x02,0x02,0x04,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//`  /64
 0x00,0x00,0x80,0x80,0x80,0x80,0x00,0x00,0x00,0x19,0x24,0x22,0x22,0x22,0x3F,0x20,//a  /65
 0x08,0xF8,0x00,0x80,0x80,0x00,0x00,0x00,0x00,0x3F,0x11,0x20,0x20,0x11,0x0E,0x00,//b  /66
 0x00,0x00,0x00,0x80,0x80,0x80,0x00,0x00,0x00,0x0E,0x11,0x20,0x20,0x20,0x11,0x00,//c  /67
 0x00,0x00,0x00,0x80,0x80,0x88,0xF8,0x00,0x00,0x0E,0x11,0x20,0x20,0x10,0x3F,0x20,//d  /68
 0x00,0x00,0x80,0x80,0x80,0x80,0x00,0x00,0x00,0x1F,0x22,0x22,0x22,0x22,0x13,0x00,//e  /69
 0x00,0x80,0x80,0xF0,0x88,0x88,0x88,0x18,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//f  /70
 0x00,0x00,0x80,0x80,0x80,0x80,0x80,0x00,0x00,0x6B,0x94,0x94,0x94,0x93,0x60,0x00,//g  /71
 0x08,0xF8,0x00,0x80,0x80,0x80,0x00,0x00,0x20,0x3F,0x21,0x00,0x00,0x20,0x3F,0x20,//h  /72
 0x00,0x80,0x98,0x98,0x00,0x00,0x00,0x00,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//i  /73
 0x00,0x00,0x00,0x80,0x98,0x98,0x00,0x00,0x00,0xC0,0x80,0x80,0x80,0x7F,0x00,0x00,//j  /74
 0x08,0xF8,0x00,0x00,0x80,0x80,0x80,0x00,0x20,0x3F,0x24,0x02,0x2D,0x30,0x20,0x00,//k  /75
 0x00,0x08,0x08,0xF8,0x00,0x00,0x00,0x00,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//l  /76
 0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x00,0x20,0x3F,0x20,0x00,0x3F,0x20,0x00,0x3F,//m  /77
 0x80,0x80,0x00,0x80,0x80,0x80,0x00,0x00,0x20,0x3F,0x21,0x00,0x00,0x20,0x3F,0x20,//n  /78
 0x00,0x00,0x80,0x80,0x80,0x80,0x00,0x00,0x00,0x1F,0x20,0x20,0x20,0x20,0x1F,0x00,//o  /79
 0x80,0x80,0x00,0x80,0x80,0x00,0x00,0x00,0x80,0xFF,0xA1,0x20,0x20,0x11,0x0E,0x00,//p  /80
 0x00,0x00,0x00,0x80,0x80,0x80,0x80,0x00,0x00,0x0E,0x11,0x20,0x20,0xA0,0xFF,0x80,//q  /81
 0x80,0x80,0x80,0x00,0x80,0x80,0x80,0x00,0x20,0x20,0x3F,0x21,0x20,0x00,0x01,0x00,//r  /82
 0x00,0x00,0x80,0x80,0x80,0x80,0x80,0x00,0x00,0x33,0x24,0x24,0x24,0x24,0x19,0x00,//s  /83
 0x00,0x80,0x80,0xE0,0x80,0x80,0x00,0x00,0x00,0x00,0x00,0x1F,0x20,0x20,0x00,0x00,//t  /84
 0x80,0x80,0x00,0x00,0x00,0x80,0x80,0x00,0x00,0x1F,0x20,0x20,0x20,0x10,0x3F,0x20,//u  /85
 0x80,0x80,0x80,0x00,0x00,0x80,0x80,0x80,0x00,0x01,0x0E,0x30,0x08,0x06,0x01,0x00,//v  /86
 0x80,0x80,0x00,0x80,0x00,0x80,0x80,0x80,0x0F,0x30,0x0C,0x03,0x0C,0x30,0x0F,0x00,//w  /87
 0x00,0x80,0x80,0x00,0x80,0x80,0x80,0x00,0x00,0x20,0x31,0x2E,0x0E,0x31,0x20,0x00,//x  /88
 0x80,0x80,0x80,0x00,0x00,0x80,0x80,0x80,0x80,0x81,0x8E,0x70,0x18,0x06,0x01,0x00,//y  /89
 0x00,0x80,0x80,0x80,0x80,0x80,0x80,0x00,0x00,0x21,0x30,0x2C,0x22,0x21,0x30,0x00,//z  /90
 0x00,0x00,0x00,0x00,0x80,0x7C,0x02,0x02,0x00,0x00,0x00,0x00,0x00,0x3F,0x40,0x40,//{  /91
 0x00,0x02,0x02,0x7C,0x80,0x00,0x00,0x00,0x00,0x40,0x40,0x3F,0x00,0x00,0x00,0x00,//}  /92
 0x00,0x00,0x00,0x00,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0x00,0x00,0x00};//|  /93

//部分汉字
const unsigned char Hzk[][32]=
{
//      //年(0) 月(1) 日(2) 生(3) 态(4) 工(5) 作(6) 室(7) 

//{0x00,0x20,0x18,0xC7,0x44,0x44,0x44,0x44,0xFC,0x44,0x44,0x44,0x44,0x04,0x00,0x00},
//{0x04,0x04,0x04,0x07,0x04,0x04,0x04,0x04,0xFF,0x04,0x04,0x04,0x04,0x04,0x04,0x00},/*"年",0*/

//{0x00,0x00,0x00,0xFE,0x22,0x22,0x22,0x22,0x22,0x22,0x22,0x22,0xFE,0x00,0x00,0x00},
//{0x80,0x40,0x30,0x0F,0x02,0x02,0x02,0x02,0x02,0x02,0x42,0x82,0x7F,0x00,0x00,0x00},/*"月",1*/

//{0x00,0x00,0x00,0xFE,0x82,0x82,0x82,0x82,0x82,0x82,0x82,0xFE,0x00,0x00,0x00,0x00},
//{0x00,0x00,0x00,0xFF,0x40,0x40,0x40,0x40,0x40,0x40,0x40,0xFF,0x00,0x00,0x00,0x00},/*"日",2*/

//{0x80,0x40,0x30,0x1E,0x10,0x10,0x10,0xFF,0x10,0x10,0x10,0x10,0x10,0x10,0x00,0x00},
//{0x40,0x40,0x42,0x42,0x42,0x42,0x42,0x7F,0x42,0x42,0x42,0x42,0x42,0x40,0x40,0x00},/*"生",3*/

//{0x00,0x04,0x84,0x84,0x44,0x24,0x54,0x8F,0x14,0x24,0x44,0x84,0x84,0x04,0x00,0x00},
//{0x41,0x39,0x00,0x00,0x3C,0x40,0x40,0x42,0x4C,0x40,0x40,0x70,0x04,0x09,0x31,0x00},/*"态",4*/

//{0x00,0x04,0x04,0x04,0x04,0x04,0x04,0xFC,0x04,0x04,0x04,0x04,0x04,0x04,0x00,0x00},
//{0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x3F,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x00},/*"工",5*/

//{0x00,0x80,0x60,0xF8,0x07,0x40,0x30,0x0F,0xF8,0x88,0x88,0x88,0x88,0x08,0x08,0x00},
//{0x01,0x00,0x00,0xFF,0x00,0x00,0x00,0x00,0xFF,0x08,0x08,0x08,0x08,0x08,0x00,0x00},/*"作",6*/

//{0x10,0x0C,0x24,0x24,0xA4,0x64,0x25,0x26,0x24,0x24,0xA4,0x24,0x24,0x14,0x0C,0x00},
//{0x40,0x40,0x48,0x49,0x49,0x49,0x49,0x7F,0x49,0x49,0x49,0x4B,0x48,0x40,0x40,0x00},/*"室",7*/
// 瑞(0) 萨(1) 电(2) 子(3) 发(4) 烧(5) 友(6)

{0x84,0x84,0xFC,0x84,0x84,0x40,0x5E,0x50,0x50,0x50,0xDF,0x50,0x50,0x50,0x5E,0x00},
{0x10,0x30,0x1F,0x08,0x08,0x00,0xFE,0x02,0x02,0x7F,0x02,0x7E,0x02,0x82,0xFE,0x00},/*"瑞",0*/
{0x04,0xE4,0x24,0x24,0xA4,0x6F,0x04,0x24,0x64,0xAF,0x34,0xA4,0x64,0x24,0x04,0x00},
{0x00,0xFF,0x00,0x11,0x22,0x9C,0x40,0x3F,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x00},/*"萨",1*/
{0x00,0x00,0xF8,0x88,0x88,0x88,0x88,0xFF,0x88,0x88,0x88,0x88,0xF8,0x00,0x00,0x00},
{0x00,0x00,0x1F,0x08,0x08,0x08,0x08,0x7F,0x88,0x88,0x88,0x88,0x9F,0x80,0xF0,0x00},/*"电",2*/
{0x80,0x82,0x82,0x82,0x82,0x82,0x82,0xE2,0xA2,0x92,0x8A,0x86,0x82,0x80,0x80,0x00},
{0x00,0x00,0x00,0x00,0x00,0x40,0x80,0x7F,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00},/*"子",3*/
{0x00,0x00,0x18,0x16,0x10,0xD0,0xB8,0x97,0x90,0x90,0x90,0x92,0x94,0x10,0x00,0x00},
{0x00,0x20,0x10,0x8C,0x83,0x80,0x41,0x46,0x28,0x10,0x28,0x44,0x43,0x80,0x80,0x00},/*"发",4*/
{0xF0,0x00,0xFF,0x20,0x10,0x00,0x88,0x88,0x4F,0x58,0x24,0x54,0x84,0xE4,0x00,0x00},
{0x80,0x70,0x0F,0x10,0x20,0x82,0x42,0x32,0x0E,0x02,0x02,0x3E,0x42,0x42,0x72,0x00},/*"烧",5*/
{0x08,0x08,0x08,0x08,0xC8,0x78,0xCF,0x48,0x48,0x48,0x48,0xC8,0x08,0x08,0x08,0x00},
{0x10,0x88,0x84,0x43,0x40,0x20,0x21,0x16,0x08,0x14,0x22,0x41,0x40,0x80,0x80,0x00},/*"友",6*/
};

#endif /* OLEDFONT_H_ */

6、hal_enty.cn修改如下：

#include "hal_data.h"
#include <stdio.h>
#include "bsp_debug_uart.h"
#include "bsp_can.h"
#include "bsp_adc.h"
#include "oled.h"

FSP_CPP_HEADER
void R_BSP_WarmStart(bsp_warm_start_event_t event);
FSP_CPP_FOOTER


/*******************************************************************************************************************//**
 * main() is generated by the RA Configuration editor and is used to generate threads if an RTOS is used.  This function
 * is called by main() when no RTOS is used.
 **********************************************************************************************************************/
void hal_entry(void)
{

  bsp_uart_init();
  bsp_can0_init();
  bsp_adc_init();
  OLED_Init();//OLED初始化
  OLED_Clear();//清屏

  //OLED_ShowString(16,1,"RA",16);
  OLED_ShowCHinese(32,1,0);//瑞
  OLED_ShowCHinese(48,1,1);//萨
  OLED_ShowCHinese(0,4,2);//电
  OLED_ShowCHinese(16,4,3);//子
  OLED_ShowCHinese(32,4,4);//发
  OLED_ShowCHinese(48,4,5);//烧
  OLED_ShowCHinese(60,4,6);//友
  while(1)
  {
    //can_send();
    read_adc();
    R_BSP_SoftwareDelay(1000, BSP_DELAY_UNITS_MILLISECONDS);
      // NOLINT100->160
  }
#if BSP_TZ_SECURE_BUILD
    /* Enter non-secure code */
    R_BSP_NonSecureEnter();
#endif
}

/*******************************************************************************************************************//**
 * This function is called at various points during the startup process.  This implementation uses the event that is
 * called right before main() to set up the pins.
 *
 * @param[in]  event    Where at in the start up process the code is currently at
 **********************************************************************************************************************/
void R_BSP_WarmStart (bsp_warm_start_event_t event)
{
    if (BSP_WARM_START_RESET == event)
    {
#if BSP_FEATURE_FLASH_LP_VERSION != 0

        /* Enable reading from data flash. */
        R_FACI_LP->DFLCTL = 1U;

        /* Would normally have to wait tDSTOP(6us) for data flash recovery. Placing the enable here, before clock and
         * C runtime initialization, should negate the need for a delay since the initialization will typically take more than 6us. */
#endif
    }

    if (BSP_WARM_START_POST_C == event)
    {
        /* C runtime environment and system clocks are setup. */

        /* Configure pins. */
        R_IOPORT_Open(&g_ioport_ctrl, g_ioport.p_cfg);
    }
}

#if BSP_TZ_SECURE_BUILD

BSP_CMSE_NONSECURE_ENTRY void template_nonsecure_callable ();

/* Trustzone Secure Projects require at least one nonsecure callable function in order to build (Remove this if it is not required to build). */
BSP_CMSE_NONSECURE_ENTRY void template_nonsecure_callable ()
{

}
#endif

6、下载到开发板，OLED可以点亮了：

7、接下来实动态显示电压：
改动bsp_adc.c如下：

void read_adc(void)
{
  fsp_err_t err = FSP_SUCCESS;
  double a0;
  uint16_t adc_data0=0;
  char vbuf[10];
  (void) R_ADC_ScanStart(&g_adc0_ctrl);
   scan_complete_flag = false;
  while (!scan_complete_flag)
  {
      /* Wait for callback to set flag. */
  }
  
  err = R_ADC_Read(&g_adc0_ctrl, ADC_CHANNEL_2, &adc_data0);
  assert(FSP_SUCCESS == err);
  a0=(double)(adc_data0/4095.0)*3.3;
  printf("v: %.03f \r\n",a0);
  sprintf(vbuf,"%.03fV",a0);
  OLED_ShowString(24,24,vbuf,24);
}

实现效果如下：

这样就实现了电压表，与实际电压对比一下，准确度还是很高的。详情见视频。