STM32-HAL库07-软件SPI驱动0.96寸OLED
一、所用材料：
STM32VGT6自制控制板
STM32CUBEMX（HAL库软件）
MDK5
二、所学内容：
通过HAL库配置四个GPIO输出口，对其进行软件模拟SPI发送规则，进而驱动OLED进行数字或字母显示，暂不设计中文文字显示。
三、CUBEMX配置：
第一步：选取四个模拟GPIO输出引脚
第二步：配置SYS
第三步：配置RCC
第四步：配置时钟
第五步：文件配置
四、MDK5程序编写：
1.配置OLED.h文件
c
#ifndef __OLED_H
#define __OLED_H
//========移植的时候，根据所选芯片引入相应的头文件==========，在main.h里面查看
#include "stm32f4xx_hal.h"
#include "gpio.h"
//OLED模式设置
//0:4线串行模式
//1:并行8080模式
#define OLED_MODE 0
#define SIZE 16
#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
//========移植的时候，根据引脚分配进行修改==========
//使用4线串行接口时使用
//RES
#define OLED_RST_Clr() HAL_GPIO_WritePin(OLED_RST_GPIO_Port, OLED_RST_Pin, GPIO_PIN_RESET) //RES RES => 接RES（RST）引脚
#define OLED_RST_Set() HAL_GPIO_WritePin(OLED_RST_GPIO_Port, OLED_RST_Pin, GPIO_PIN_SET)
//DC
#define OLED_DC_Clr() HAL_GPIO_WritePin(OLED_DC_GPIO_Port, OLED_DC_Pin, GPIO_PIN_RESET)
#define OLED_DC_Set() HAL_GPIO_WritePin(OLED_DC_GPIO_Port, OLED_DC_Pin, GPIO_PIN_SET)
//SCLK,D0
#define OLED_SCLK_Clr() HAL_GPIO_WritePin(OLED_SCL_GPIO_Port, OLED_SCL_Pin, GPIO_PIN_RESET)
#define OLED_SCLK_Set() HAL_GPIO_WritePin(OLED_SCL_GPIO_Port, OLED_SCL_Pin, GPIO_PIN_SET)
//SDIN,D1
#define OLED_SDIN_Clr() HAL_GPIO_WritePin(OLED_SDA_GPIO_Port, OLED_SDA_Pin, GPIO_PIN_RESET)
#define OLED_SDIN_Set() HAL_GPIO_WritePin(OLED_SDA_GPIO_Port, OLED_SDA_Pin, GPIO_PIN_SET)
#define OLED_CMD 0 //写命令
#define OLED_DATA 1 //写数据
//OLED控制用函数
void OLED_WR_Byte(unsigned char dat,unsigned char cmd);
void OLED_Display_On(void);
void OLED_Display_Off(void);
void OLED_Init(void);
void OLED_Clear(void);
void OLED_DrawPoint(unsigned char x,unsigned char y,unsigned char t);
void OLED_Fill(unsigned char x1,unsigned char y1,unsigned char x2,unsigned char y2,unsigned char dot);
void OLED_ShowChar(unsigned char x,unsigned char y,unsigned char chr);
void OLED_ShowNum(unsigned char x,unsigned char y,unsigned long num,unsigned char len,unsigned char size);
void OLED_Showint (unsigned char x,unsigned char y,unsigned long num);
void OLED_ShowString(unsigned char x,unsigned char y, unsigned char *p);
void OLED_Set_Pos(unsigned char x, unsigned char y);
void OLED_ShowCHinese(unsigned char x,unsigned char y,unsigned char no);
void OLED_DrawBMP(unsigned char x0, unsigned char y0,unsigned char x1, unsigned char y1,unsigned char BMP[]);
#endif2.配置OLED.c文件
c
#include <stdio.h>
#include <stdlib.h>
#include "OLED.h"
#include "OLED_Font.h"
//0.96寸OLED 屏幕简称SSD1106
//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
#if OLED_MODE==1
//向SSD1106写入一个字节。
//dat:要写入的数据/命令
//cmd:数据/命令标志 0,表示命令;1,表示数据;
void OLED_WR_Byte(unsigned char dat,unsigned char cmd)
{
DATAOUT(dat);
if(cmd)
OLED_DC_Set();
else
OLED_DC_Clr();
OLED_WR_Clr();
OLED_WR_Set();
OLED_DC_Set();
}
#else
//向SSD1106写入一个字节。
//dat:要写入的数据/命令
//cmd:数据/命令标志 0,表示命令;1,表示数据;
void OLED_WR_Byte(unsigned char dat,unsigned char cmd)
{
unsigned char i;
if(cmd)
OLED_DC_Set();
else
OLED_DC_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_DC_Set();
}
#endif
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)|0x01,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)
{
unsigned char 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 (0x02,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(unsigned char x,unsigned char y,unsigned char 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
unsigned long oled_pow(unsigned char m,unsigned char n)
{
unsigned long 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(unsigned char x,unsigned char y,unsigned long num,unsigned char len,unsigned char size)
{
unsigned char t,temp;
unsigned char 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+(size/2)*t,y,'0');
continue;
}else enshow=1;
}
OLED_ShowChar(x+(size/2)*t,y,temp+'0');
}
}
void OLED_Showint (unsigned char x,unsigned char y,unsigned long num)
{
unsigned long output;
output = num/10000;
OLED_ShowChar(x+8*0,y,output+'0');
num = num % 10000;
output = num/1000;
OLED_ShowChar(x+8*1,y,output+'0');
num = num % 1000;
output = num/100;
OLED_ShowChar(x+8*2,y,output+'0');
num = num % 100;
output = num/10;
OLED_ShowChar(x+8*3,y,output+'0');
num = num % 10;
output = num;
OLED_ShowChar(x+8*4,y,output+'0');
}
/**
* @brief 显示一个字符号串
* @param x : uint8_t 起点列坐标
* @param y : uint8_t 起点行坐标
* @param chr : uint8_t *字符串指针
* @retval 无
*/
void OLED_ShowString(unsigned char x,unsigned char y,unsigned char *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(unsigned char x,unsigned char y,unsigned char no)
{
unsigned char 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SH1106
void OLED_Init(void)
{
OLED_RST_Set();
HAL_Delay(100);
OLED_RST_Clr();
HAL_Delay(100);
OLED_RST_Set();
OLED_WR_Byte(0xAE,OLED_CMD);//--turn off oled panel
OLED_WR_Byte(0x02,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 Set Mapping RAM Display Start Line (0x00~0x3F)
OLED_WR_Byte(0x81,OLED_CMD);//--set contrast control register
OLED_WR_Byte(0xCF,OLED_CMD); // Set SEG Output Current Brightness
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
OLED_WR_Byte(0xA8,OLED_CMD);//--set multiplex ratio(1 to 64)
OLED_WR_Byte(0x3f,OLED_CMD);//--1/64 duty
OLED_WR_Byte(0xD3,OLED_CMD);//-set display offset Shift Mapping RAM Counter (0x00~0x3F)
OLED_WR_Byte(0x00,OLED_CMD);//-not offset
OLED_WR_Byte(0xd5,OLED_CMD);//--set display clock divide ratio/oscillator frequency
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
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
OLED_WR_Byte(0x12,OLED_CMD);
OLED_WR_Byte(0xDB,OLED_CMD);//--set vcomh
OLED_WR_Byte(0x40,OLED_CMD);//Set VCOM Deselect Level
OLED_WR_Byte(0x20,OLED_CMD);//-Set Page Addressing Mode (0x00/0x01/0x02)
OLED_WR_Byte(0x02,OLED_CMD);//
OLED_WR_Byte(0x8D,OLED_CMD);//--set Charge Pump enable/disable
OLED_WR_Byte(0x14,OLED_CMD);//--set(0x10) disable
OLED_WR_Byte(0xA4,OLED_CMD);// Disable Entire Display On (0xa4/0xa5)
OLED_WR_Byte(0xA6,OLED_CMD);// Disable Inverse Display On (0xa6/a7)
OLED_WR_Byte(0xAF,OLED_CMD);//--turn on oled panel
OLED_WR_Byte(0xAF,OLED_CMD); /*display ON*/
OLED_Clear();
OLED_Set_Pos(0,0);
}