STM32F103 SPI软件模拟（SSD1306）
有关SPI通信协议我们在《通信协议-SPI》已经进行了详细的介绍，因此这一节不再重复介绍。
一、软件/硬件SPI
想要控制STM32产生SPI方式的通讯，可以采用软件模拟或硬件SPI这两种方式。
1.1 软件模拟
所谓软件模拟，即直接使用CPU内核按照SPI协议的要求控制GPIO输出高低电平。
1.2 硬件SPI
硬件SPI是指直接利用STM32芯片中的硬件SPI外设，该硬件SPI外设跟USART串口外设类似，只要配置好对应的寄存器， 外设就会产生标准串口协议的时序。
使用它的SPI外设则可以方便地通过外设寄存器产生SPI协议方式的通讯，如初始化好SPI外设后， 只需要把某寄存器位置1，那么外设就会控制对应的SCK及MOSI/MISO线自动进行SPI数据传输，而不需要内核直接控制引脚的电平。
相对来说，硬件SPI直接使用外设来控制引脚，可以减轻CPU的负担。不过使用硬件SPI时必须使用某些固定的引脚作为SCL和MOSI/MISO， 软件模拟SPI则可以使用任意GPIO引脚，相对比较灵活。
在本开发板中，由于STM32F103RCT6芯片引脚较少，资源比较紧张， 在设计硬件时不方便使用硬件SPI指定的引脚连接外部设备，所以在控制程序上这里使用软件模拟SPI的方式。
二、OLED128x64（SSD1306）
2.1 回顾
有关OLED128x64（SSD1306）可以参考《Mini2440裸机开发之SPI（OLED SSD1306）》小节中的介绍；
在《Mini2440裸机开发之SPI（OLED SSD1306）》我们介绍了SSD1306的常用命令，以及SPI通信方式。
后续我们又在《linux驱动移植-SPI驱动移植（OLED SSD1306）》中介绍了SPI设备驱动的编写，并以OLED SSD1306作为学习SPI的测试设备。
2.2 硬件接线
当SSD1306选定SPI接口方式，SPI引脚定义：
CS：片选信号；连接是STM32F103的PC0引脚；DC：命令数据选择引脚；连接STM32F103的PC1引脚；0：读写命令；1：读写数据；
RES：模块复位引脚，低电平有效；连接STM32F103的PC2引脚；D1：MOSI引脚，SPI数据线，主设备输出从设备输入引脚；连接STM32F103的PC3引脚；D0：SCLK引脚，SPI时钟线；连接STM32F103的PC4引脚；VCC：电源正极3.3~5V，连接STM32F103的PC5引脚；GND：电源地，连接STM32F103的PC6引脚。
三、OLED源码实现
3.1 GPIO初始化
配置PC0~PC6引脚，均配置为通用推挽输出，最大速度2MHZ；
/*******************************************************************************************
*4线SPI使用说明：
*VBT 供内部DC-DC电压，3.3~4.3V，如果使用5V电压，为保险起见串一个100~500欧的电阻
*VCC 供内部逻辑电压 1.8~6V
*GND 地
*BS0 低电平
*BS1 低电平
*BS2 低电平
*CS 片选管脚
*DC 命令数据选择管脚
*RES 模块复位管脚
*D0（SCLK） ，时钟脚，由MCU控制
*D1（MOSI） ，主输出从输入数据脚，由MCU控制
*D2 悬空
*D3-D7 ， 低电平 ， 也可悬空，但最好设为低电平
*RD 低电平 ，也可悬空，但最好设为低电平
*RW 低电平 ，也可悬空，但最好设为低电平
*RD 低电平 ，也可悬空，但最好设为低电平
************************************************************************************************/
//************************************************************12864端口定义*********************************
#define OLED_GND PCout(6) //GND
#define OLED_VCC PCout(5) //VCC
#define OLED_SCL PCout(4) //串行时钟线
#define OLED_SDA PCout(3) //串行数据线
#define OLED_RST PCout(2) //硬复位
#define OLED_DC PCout(1) //命令/数据标志 0：读写命令 1：读写数据
#define OLED_CS PCout(0) //片选信号
/*******************************************************************************
*
* Description: 初始化所用到的引脚
*
******************************************************************************/
void OLED12864_GPIO_Init(void) //初始化所用到的引脚
{
gpio_init(PC0,GPO_PUSH_PULL_2,HIGH);
gpio_init(PC1,GPO_PUSH_PULL_2,HIGH);
gpio_init(PC2,GPO_PUSH_PULL_2,HIGH);
gpio_init(PC3,GPO_PUSH_PULL_2,HIGH);
gpio_init(PC4,GPO_PUSH_PULL_2,HIGH);
gpio_init(PC5,GPO_PUSH_PULL_2,HIGH);
gpio_init(PC6,GPO_PUSH_PULL_2,LOW);
};
3.2 写命令
写命令需要将DC设置为低电平，然后发送一个字节的命令即可；
/*******************************************************************************
*
* Description: 写命令 DC=0 CS=0 CLK上升沿数据传递
* 数据从高位开始写入
*
******************************************************************************/
void OLED_Wcmd(u8 cmd) //写命令
{
u8 i;
OLED_CS=0; //片选
OLED_DC=0; //写命令
for(i=0;i<8;i++)
{
OLED_SCL=0;
if(cmd&0x80)
OLED_SDA=1;
else
OLED_SDA=0;
OLED_SCL=1;
cmd <<=1;
}
OLED_CS=1; //锁存
}
3.3 写数据
写数据需要将DC设置为高电平，然后发送一个字节的数据即可；
/*******************************************************************************
*
* Description: 写数据 DC=1 CS=0 CLK上升沿数据传递
* 数据从高位开始写入
*
******************************************************************************/
void OLED_Wdata(u8 data) //写数据
{
u8 i;
OLED_CS=0; //片选
OLED_DC=1; //写数据
for(i=0;i<8;i++)
{
OLED_SCL=0;
if(data&0x80)
OLED_SDA=1;
else
OLED_SDA=0;
OLED_SCL=1;
data <<=1;
}
OLED_CS=1; //锁存
}
3.4 设置OLED坐标
设置R坐标需要使用到两个命令：
- 设置页地址，使用单字节指令：
0xB0H + A[3:0]； - 设置列地址，使用单字节指令：
0x00H / 0x10H （低/高）+ A[3:0]；
实现如下：
/***************************************************************************************************
*
* Description: OLED12864设置坐标 一个ASCII字符字符占用6*8 6列8行
* x ： 设置列地址0~0X7F
* y : 设置页地址0~7
*
**************************************************************************************************/
void OLED_Pos(u8 x,u8 y) //坐标设定
{
OLED_Wcmd(0xB0+y);
OLED_Wcmd(((x&0xF0)>>4)|0x10); //设置列地址高四位
OLED_Wcmd((x&0x0F)|0x01); //设置列地址低四位
}
3.5 清屏
清屏需要将OLED所有的页数据清零；
//**************************************清屏*******************************
void OLED_Clear(void)
{
u8 x;
u8 y;
for(y=0;y<8;y++)
{
OLED_Wcmd(0xB0+y); //选择页
OLED_Wcmd(0x01);
OLED_Wcmd(0x10);
for(x=0;x<0x80;x++)
OLED_Wdata(0x00); //每次清1列
}
}
3.6 OLED初始化
初始化代码如下所示，这里我们就不深究每个命令的含义了，具体查看数据手册；
/***************************************************************************************************
*
* Description: OLED12864初始化
*
*
**************************************************************************************************/
void OLED12864_Init(void) //初始化配置
{
OLED_SCL=1;
OLED_CS=0;
OLED_RST=0;
delay_ms(50); //复位
OLED_RST=1;
OLED_Wcmd(0xAE); //显示关
OLED_Wcmd(0x00) ; //设置列低位地址
OLED_Wcmd(0x10); //设置列高位地址
OLED_Wcmd(0x40); //--set start line address Set Mapping RAM Display Start Line (0x00~0x3F)
OLED_Wcmd(0X81); //设置对比度
OLED_Wcmd(0xCF); //值越大 越亮
OLED_Wcmd(0xA1); //设置列左右反置 0xa0左右反置 0xa1正常
OLED_Wcmd(0xC8); //设置行上下反置 0xc0上下反置 0xc8正常
OLED_Wcmd(0xA6); //设置正常显示
OLED_Wcmd(0x20); //设置页地址模式 (0x00/0x01/0x02)
OLED_Wcmd(0x02);
OLED_Wcmd(0x8D); //设置电荷磊开关
OLED_Wcmd(0x14); //电荷磊开
OLED_Wcmd(0xA4); //字符显示开关 0xA4：开 0xA5：关
OLED_Wcmd(0xA6); // 背景色显示开关 0xA6:关 0xA7:开
OLED_Wcmd(0xAF); //显示开
OLED_Clear(); //初始清屏
OLED_Pos(0,0);
}
3.7 显示字符
关于字符的显示原理这里不重复介绍了，具体可以查看《Mini2440裸机开发之LCD编程（GB2312、ASCII字库制作）》。
/******************************************************************************
*
* oled128x64点阵 分为八页 每页128个字符 一页中的每一列即一个字符（8位） 共128列
每次写入一个字符 即写入一页中的一列 从上到下依次为D0~D7
采用串行SPI方式写入 是从高位（D7）到低位(D0)依次写入
* 初始化步骤：1.关闭显示
2.设置对比度
3.设置页地址
4.设置列地址
5.电荷磊设置
6.显示开
7.清屏 写入'\0'
*
*
****************************************************************************/
/*****************************************************************************************************
*
* 从ASCII 0x20 开始的点阵 一个字节占6行8列
* 取模方式 列行式 低位在前
*
*
*****************************************************************************************************/
const u8 ASCII6x8[][6] =
{
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, // sp ASCII 0x20
{ 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
};
/*****************************************************************************************************
*
* 从ASCII 0x20 开始的点阵 一个字节16行8列
* 取模方式 列行式 低位在前
*
*
***************************************************************************************************/
const u8 ASCII16x8[][16]=
{
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,// 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,//016
0x00,0x10,0x10,0xF8,0x00,0x00,0x00,0x00,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//117
0x00,0x70,0x08,0x08,0x08,0x88,0x70,0x00,0x00,0x30,0x28,0x24,0x22,0x21,0x30,0x00,//218
0x00,0x30,0x08,0x88,0x88,0x48,0x30,0x00,0x00,0x18,0x20,0x20,0x20,0x11,0x0E,0x00,//319
0x00,0x00,0xC0,0x20,0x10,0xF8,0x00,0x00,0x00,0x07,0x04,0x24,0x24,0x3F,0x24,0x00,//420
0x00,0xF8,0x08,0x88,0x88,0x08,0x08,0x00,0x00,0x19,0x21,0x20,0x20,0x11,0x0E,0x00,//521
0x00,0xE0,0x10,0x88,0x88,0x18,0x00,0x00,0x00,0x0F,0x11,0x20,0x20,0x11,0x0E,0x00,//622
0x00,0x38,0x08,0x08,0xC8,0x38,0x08,0x00,0x00,0x00,0x00,0x3F,0x00,0x00,0x00,0x00,//723
0x00,0x70,0x88,0x08,0x08,0x88,0x70,0x00,0x00,0x1C,0x22,0x21,0x21,0x22,0x1C,0x00,//824
0x00,0xE0,0x10,0x08,0x08,0x10,0xE0,0x00,0x00,0x00,0x31,0x22,0x22,0x11,0x0F,0x00,//925
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,//A33
0x08,0xF8,0x88,0x88,0x88,0x70,0x00,0x00,0x20,0x3F,0x20,0x20,0x20,0x11,0x0E,0x00,//B34
0xC0,0x30,0x08,0x08,0x08,0x08,0x38,0x00,0x07,0x18,0x20,0x20,0x20,0x10,0x08,0x00,//C35
0x08,0xF8,0x08,0x08,0x08,0x10,0xE0,0x00,0x20,0x3F,0x20,0x20,0x20,0x10,0x0F,0x00,//D36
0x08,0xF8,0x88,0x88,0xE8,0x08,0x10,0x00,0x20,0x3F,0x20,0x20,0x23,0x20,0x18,0x00,//E37
0x08,0xF8,0x88,0x88,0xE8,0x08,0x10,0x00,0x20,0x3F,0x20,0x00,0x03,0x00,0x00,0x00,//F38
0xC0,0x30,0x08,0x08,0x08,0x38,0x00,0x00,0x07,0x18,0x20,0x20,0x22,0x1E,0x02,0x00,//G39
0x08,0xF8,0x08,0x00,0x00,0x08,0xF8,0x08,0x20,0x3F,0x21,0x01,0x01,0x21,0x3F,0x20,//H40
0x00,0x08,0x08,0xF8,0x08,0x08,0x00,0x00,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//I41
0x00,0x00,0x08,0x08,0xF8,0x08,0x08,0x00,0xC0,0x80,0x80,0x80,0x7F,0x00,0x00,0x00,//J42
0x08,0xF8,0x88,0xC0,0x28,0x18,0x08,0x00,0x20,0x3F,0x20,0x01,0x26,0x38,0x20,0x00,//K43
0x08,0xF8,0x08,0x00,0x00,0x00,0x00,0x00,0x20,0x3F,0x20,0x20,0x20,0x20,0x30,0x00,//L44
0x08,0xF8,0xF8,0x00,0xF8,0xF8,0x08,0x00,0x20,0x3F,0x00,0x3F,0x00,0x3F,0x20,0x00,//M45
0x08,0xF8,0x30,0xC0,0x00,0x08,0xF8,0x08,0x20,0x3F,0x20,0x00,0x07,0x18,0x3F,0x00,//N46
0xE0,0x10,0x08,0x08,0x08,0x10,0xE0,0x00,0x0F,0x10,0x20,0x20,0x20,0x10,0x0F,0x00,//O47
0x08,0xF8,0x08,0x08,0x08,0x08,0xF0,0x00,0x20,0x3F,0x21,0x01,0x01,0x01,0x00,0x00,//P48
0xE0,0x10,0x08,0x08,0x08,0x10,0xE0,0x00,0x0F,0x18,0x24,0x24,0x38,0x50,0x4F,0x00,//Q49
0x08,0xF8,0x88,0x88,0x88,0x88,0x70,0x00,0x20,0x3F,0x20,0x00,0x03,0x0C,0x30,0x20,//R50
0x00,0x70,0x88,0x08,0x08,0x08,0x38,0x00,0x00,0x38,0x20,0x21,0x21,0x22,0x1C,0x00,//S51
0x18,0x08,0x08,0xF8,0x08,0x08,0x18,0x00,0x00,0x00,0x20,0x3F,0x20,0x00,0x00,0x00,//T52
0x08,0xF8,0x08,0x00,0x00,0x08,0xF8,0x08,0x00,0x1F,0x20,0x20,0x20,0x20,0x1F,0x00,//U53
0x08,0x78,0x88,0x00,0x00,0xC8,0x38,0x08,0x00,0x00,0x07,0x38,0x0E,0x01,0x00,0x00,//V54
0xF8,0x08,0x00,0xF8,0x00,0x08,0xF8,0x00,0x03,0x3C,0x07,0x00,0x07,0x3C,0x03,0x00,//W55
0x08,0x18,0x68,0x80,0x80,0x68,0x18,0x08,0x20,0x30,0x2C,0x03,0x03,0x2C,0x30,0x20,//X56
0x08,0x38,0xC8,0x00,0xC8,0x38,0x08,0x00,0x00,0x00,0x20,0x3F,0x20,0x00,0x00,0x00,//Y57
0x10,0x08,0x08,0x08,0xC8,0x38,0x08,0x00,0x20,0x38,0x26,0x21,0x20,0x20,0x18,0x00,//Z58
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,//a65
0x08,0xF8,0x00,0x80,0x80,0x00,0x00,0x00,0x00,0x3F,0x11,0x20,0x20,0x11,0x0E,0x00,//b66
0x00,0x00,0x00,0x80,0x80,0x80,0x00,0x00,0x00,0x0E,0x11,0x20,0x20,0x20,0x11,0x00,//c67
0x00,0x00,0x00,0x80,0x80,0x88,0xF8,0x00,0x00,0x0E,0x11,0x20,0x20,0x10,0x3F,0x20,//d68
0x00,0x00,0x80,0x80,0x80,0x80,0x00,0x00,0x00,0x1F,0x22,0x22,0x22,0x22,0x13,0x00,//e69
0x00,0x80,0x80,0xF0,0x88,0x88,0x88,0x18,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//f70
0x00,0x00,0x80,0x80,0x80,0x80,0x80,0x00,0x00,0x6B,0x94,0x94,0x94,0x93,0x60,0x00,//g71
0x08,0xF8,0x00,0x80,0x80,0x80,0x00,0x00,0x20,0x3F,0x21,0x00,0x00,0x20,0x3F,0x20,//h72
0x00,0x80,0x98,0x98,0x00,0x00,0x00,0x00,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//i73
0x00,0x00,0x00,0x80,0x98,0x98,0x00,0x00,0x00,0xC0,0x80,0x80,0x80,0x7F,0x00,0x00,//j74
0x08,0xF8,0x00,0x00,0x80,0x80,0x80,0x00,0x20,0x3F,0x24,0x02,0x2D,0x30,0x20,0x00,//k75
0x00,0x08,0x08,0xF8,0x00,0x00,0x00,0x00,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//l76
0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x00,0x20,0x3F,0x20,0x00,0x3F,0x20,0x00,0x3F,//m77
0x80,0x80,0x00,0x80,0x80,0x80,0x00,0x00,0x20,0x3F,0x21,0x00,0x00,0x20,0x3F,0x20,//n78
0x00,0x00,0x80,0x80,0x80,0x80,0x00,0x00,0x00,0x1F,0x20,0x20,0x20,0x20,0x1F,0x00,//o79
0x80,0x80,0x00,0x80,0x80,0x00,0x00,0x00,0x80,0xFF,0xA1,0x20,0x20,0x11,0x0E,0x00,//p80
0x00,0x00,0x00,0x80,0x80,0x80,0x80,0x00,0x00,0x0E,0x11,0x20,0x20,0xA0,0xFF,0x80,//q81
0x80,0x80,0x80,0x00,0x80,0x80,0x80,0x00,0x20,0x20,0x3F,0x21,0x20,0x00,0x01,0x00,//r82
0x00,0x00,0x80,0x80,0x80,0x80,0x80,0x00,0x00,0x33,0x24,0x24,0x24,0x24,0x19,0x00,//s83
0x00,0x80,0x80,0xE0,0x80,0x80,0x00,0x00,0x00,0x00,0x00,0x1F,0x20,0x20,0x00,0x00,//t84
0x80,0x80,0x00,0x00,0x00,0x80,0x80,0x00,0x00,0x1F,0x20,0x20,0x20,0x10,0x3F,0x20,//u85
0x80,0x80,0x80,0x00,0x00,0x80,0x80,0x80,0x00,0x01,0x0E,0x30,0x08,0x06,0x01,0x00,//v86
0x80,0x80,0x00,0x80,0x00,0x80,0x80,0x80,0x0F,0x30,0x0C,0x03,0x0C,0x30,0x0F,0x00,//w87
0x00,0x80,0x80,0x00,0x80,0x80,0x80,0x00,0x00,0x20,0x31,0x2E,0x0E,0x31,0x20,0x00,//x88
0x80,0x80,0x80,0x00,0x00,0x80,0x80,0x80,0x80,0x81,0x8E,0x70,0x18,0x06,0x01,0x00,//y89
0x00,0x80,0x80,0x80,0x80,0x80,0x80,0x00,0x00,0x21,0x30,0x2C,0x22,0x21,0x30,0x00,//z90
0x00,0x00,0x00,0x00,0x80,0x7C,0x02,0x02,0x00,0x00,0x00,0x00,0x00,0x3F,0x40,0x40,//{91
0x00,0x00,0x00,0x00,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0x00,0x00,0x00,//|92
0x00,0x02,0x02,0x7C,0x80,0x00,0x00,0x00,0x00,0x40,0x40,0x3F,0x00,0x00,0x00,0x00,//}93
0x00,0x06,0x01,0x01,0x02,0x02,0x04,0x04,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//~94
};
/*****************************************************************************************************
*
* 从ASCII 0x20 开始的点阵 一个字节8行16列
* 取模方式 列行式 低位在前
*
*
***************************************************************************************************/
const u8 CHINESE8x16[][16]=
{
0x00,0x00,0x20,0x28,0x24,0x94,0xB4,0x5C,0x32,0x54,0x54,0x54,0x14,0x10,0x10,0x00, /*"安",0*/
0x00,0x00,0x14,0x7C,0x0A,0x78,0x5C,0x6A,0x54,0x6A,0x58,0x26,0x5A,0x40,0x40,0x00, /*"徽",1*/
0x00,0x00,0x40,0x54,0x3C,0x04,0x44,0x5C,0x74,0x7C,0x54,0x4A,0x4E,0x46,0x40,0x00, /*"理",2*/
0x00,0x00,0x40,0x40,0x40,0x44,0x44,0x24,0x5C,0x44,0x44,0x40,0x40,0x40,0x00,0x00, /*"工",3*/
0x00,0x00,0x00,0x00,0x50,0x48,0x28,0x1E,0x28,0x28,0x48,0x48,0x40,0x40,0x00,0x00, /*"大",4*/
0x00,0x00,0x08,0x28,0x28,0x2A,0x28,0x9A,0x6E,0x2C,0x27,0x24,0x24,0x04,0x00,0x00, /*"学",5*/
0x00,0x40,0x48,0x28,0x18,0x2C,0x40,0x48,0x34,0x2A,0x48,0x4C,0x40,0x40,0x00,0x00, /*"欢",6*/
0x00,0x00,0x40,0x3A,0x48,0x40,0x5C,0x54,0x4A,0x7E,0x44,0x44,0x5C,0x40,0x00,0x00, /*"迎",7*/
0x00,0x10,0x10,0x08,0x7C,0x02,0x28,0x08,0x04,0x8A,0x78,0x08,0x04,0x24,0x00,0x00, /*"你",8*/
};
3.7.1 1个ASCII字符8行6列
/*******************************************************************************************************
*
* Functon： OLED_P6x8Str(u8 x,u8 y,u8 *str)
* Description: 写入一组标准ASCII字符串
* Parameter ： 显示的位置（x,y），y为页范围0～7，要显示的字符串
* x ： 设置列地址0~0X7F
* y : 设置页地址0~7
* 一个字节占8行6列
*
*********************************************************************************************************/
void OLED_P6x8Str(u8 x,u8 y,u8 *str) //6列8行 一列8位
{
u8 i=0;
u8 j=0;
u8 k=0;
while (str[j]!='\0')
{
while((str[j]<0x20)||(str[j]>0x80)) //当写入的没有对应的点阵时 显示空格
str[j]=32;
k =str[j]-32;
if(x>121)
{
x=0;
y++;
}
OLED_Pos(x,y); //选中坐标
for(i=0;i<6;i++)
OLED_Wdata(ASCII6x8[k][i]); //写入一个字节
x+=6;
j++;
}
}
5.7.2 1个ASCII字符16行8列
/*******************************************************************************************************
*
* Functon： OLED_P16x8Str(u8 x,u8 y,u8 *str)
* Description: 写入一组标准ASCII字符串
* Parameter ： 显示的位置（x,y），y为页范围0～7，要显示的字符串
* x ： 设置列地址0~0X7F
* y : 设置页地址0~7
* 一个字节占16行8列
*
*********************************************************************************************************/
void OLED_P16x8Str(u8 x,u8 y,u8 *str)
{
u8 i=0;
u8 j=0;
u8 k=0;
while(str[j]!='\0')
{
while((str[j]<0x20)||(str[j]>0x80)) //当写入的没有对应的点阵时 显示空格
str[j]=32;
k=str[j]-32;
if(x>120) //列溢出 写入下一页
{
x=0;
y++;
}
OLED_Pos(x,y); //选中页和列坐标
for(i=0;i<8;i++) //写入上八行
{
OLED_Wdata(ASCII16x8[k][i]);
}
OLED_Pos(x,y+1);
for(i=0;i<8;i++) //写入下八行
{
OLED_Wdata(ASCII16x8[k][i+8]);
}
x+=8; //x坐标右移8位 准备写入下一个字节
j++; //下一个字符
}
}
3.7.3 1个汉字8行16列
/*******************************************************************************************************
*
* Functon： OLED_P8x16Chi(u8 x,u8 y,u8 *str)
* Description: 写入一组汉字
* Parameter ： 显示的位置（x,y），y为页范围0～7，要显示的字符串
* x ： 设置列地址0~0X7F
* y : 设置页地址0~7
* 一个字占8行16列
*
*********************************************************************************************************/
void OLED_P8x16Chi(u8 x,u8 y,u8 *str)
{
u8 i=0;
u8 j=0;
u8 k=0;
while(str[j]!='\0')
{
if(x>120) //列溢出 写入下一页
{
x=0;
y++;
}
OLED_Pos(x,y); //选中页和列坐标
for(i=0;i<16;i++) //写入字
{
OLED_Wdata(CHINESE8x16[k][i]);
}
x+=16; //x坐标右移8位 准备写入下一个字节
j+=2; //下一个字
k++;
}
}
3.8 实现功能
这里我们通过OLED实时输出RTC时间。
3.8.1 main函数实现
int main()
{
u8 *time;
STM32_Clock_Init(9); //系统时钟初始化
STM32_NVIC_Init(2,USART1_IRQn,0,1); //串口中断优先级初始化，其中包括中断使能
usart_init(USART_1,115200); //串口1初始化，波特率115200 映射到PA9 PA10
STM32_NVIC_Init(2,RTC_IRQn,0,1); //RTC中断优先级初始化，其中包括中断使能
while(RTC_Init()); //RTC初始化
time = RTCTime();
OLED12864_GPIO_Init(); //GPIO初始化
OLED12864_Init(); //OLED初始化
OLED_P16x8Str(45,0,"OLED"); //调用LCD_P8x16Str字符串显示函数，在第0页即第一行的第45列开始，显示字符串“OLED"
OLED_P8x16Chi(16,6,"安徽理工大学");
while(1)
{
time = RTCTime();
OLED_P6x8Str(8,4,time); //显示当前时间
delay_ms(1000);
}
}
3.8.2 测试
编译程序并下载测试，这里我们需要按照2.2节进行硬件接线，OLED测试效果如下；
下图是使用逻辑分析器捕捉到的模拟SPI信号；
并且在右上角可以看到时钟频率大概在1.67MHz。
四、源码下载
源码下载路径：stm32f103。
浙公网安备 33010602011771号