瑞萨RA系列FSP库开发实战指南之SPI的OLED屏幕显示实验

作者：发布时间：2026-03-11 15:00:37 浏览量：

22.3

OLED相关

OLED，即有机发光二极管（OrganicLight-EmittingDiode），又称为有机电激光显示（OrganicElectroluminesence Display，OELD）。OLED由于同时具备自发光，不需背光源、对比度高、厚度薄、视角广、反应速度快、可用于挠曲性面板、使用温度范围广、构造及制程较简单等优异之特性，被认为是下一代的平面显示器新兴应用技术。OLED显示技术具有自发光的特性，采用非常薄的有机材料涂层和玻璃基板，当有电流通过时，这些有机材料就会发光，而且OLED显示屏幕可视角度大，并且能够节省电能。

本文使用是0.96寸的OLED显示模块（蓝色）作为实验模块，详细资料可以在野火电子官网找到。实物如下所示：

• 分辨率为128*64

• 驱动IC芯片为SSD1306

• 4线SPI总线通信方式

原理图如下：

22.3.1

接口协议

对于4线制SPI接口协议，其通信过程对于片选信号和数据/命令切换信号的要求如下图所示：

通过设置CS引脚为低电平，我们可以确定器件为选中状态，设置其DC引脚不同的电平状态，来控制输出的指令为地址指令还是数据指令。

SSD1306的4线制SPI通信的时序如下图所示：

我们可以看到，CS信号线由高变低，是SPI通讯的起始信号,MOSI信号线负责传输数据，MOSI的数据在SCLK的下升沿或低电平期间变化输出，在SCLK上降沿的时候,SDIN(MOSI)的数据有效，SDIN(MOSI) 将数据锁存，高电平时表示数据“1”，为低电平时表示数据“0”。在其它时刻，数据无效。SSD1306芯片则根据DC信号线的电平状态，来区分接受到的指令是地址指令还是数据指令，最后，当数据/命令传输完毕后，CS信号线由低变高，解除对当前设备的选中状态，至此，一次数据传输完成。

22.3.2

显存写入方式

SSD1306的显存写入方式有三种，分别是页地址模式，横向地址模式和纵向地址模式。不同的地址模式下，把数据写入显存后，显存的地址变化方式是不一样的。我们这里选择的是页地址模式，在页地址模式下，在发送完显示数据后，列地址指针将增加。如果列地址指针到达列结束地址，则列地址指针为重置为列开始地址，而页地址指针不更改，需要用户设置新页面，并且列地址为访问下一页显存。

页地址与列地址的移动顺序如下图所示：

22.3.3

命令字

关于SSD1306的基本命令字及说明如下表：

表1:SSD1306的基本命令字

22.4

SPI-OLED显示实验

野火启明6M5开发板的扩展SPI接口电路图如图所示：

因为野火启明4M2开发板的扩展SPI接口被下载调试引脚占用，故采用GPIO-软件SPI的方式来测试实验。

野火启明4M2开发板的扩展OLED6线接口电路图如图所示：

野火启明2L1开发板的扩展SPI接口电路图如图所示：

因为对于OLED模块，主机只需要发送显示数据，它也只需要接受显示数据，所以我们只需要连接MOSI这条线即可。

表2：OLED模块连接引脚分配

使用瑞萨官方提供的FPS库进行编程，瑞萨官方提供的FPS库具有方便、快捷、简洁的特性。

22.4.1

新建工程

对于e2studio开发环境：拷贝一份我们之前的e2s 工程“05_Template”，然后将工程文件夹重命名为“SPI_OLED”，最后再将它导入到我们的e2studio工作空间中。

对于Keil开发环境：拷贝一份我们之前的Keil工程模板“05_Template”，然后将工程文件夹重命名为“SPI_OLED”，并进入该文件夹里面双击Keil工程文件，打开该工程。

工程新建好之后，在工程根目录的“src”文件夹下面新建“spi_oled”文件夹，再进入“spi_oled”文件夹里面新建源文件和头文件：“bsp_spi_oled.c”和“bsp_spi_oled.h”，并添加好字库文件“codetab.h”，具体代码见下。

整个工程文件结构如下：

列表1：文件结构

左右滑动查看完整内容

SPI_OLED
├─......
└─src
├─ spi_oled
│ ├─ bsp_spi_oled.c
│ ├─ bsp_spi_oled.h
| └─ codetab.h
└─ hal_entry.c

列表2：codetab.h

左右滑动查看完整内容

/************************************************************************************
 * Description:
 * 1. 128*64点整OLED模块功能演示程序的字表;
 * 2. 字表由打包资料中的“取字软件”计算得出;
 * 3. 取字方式 -- 共阴、列行式、逆向输出
 *
 *
 *************************************************************************************/

 /***************************16*16的点阵字体取模方式：共阴——列行式——逆向输出*********/
 #ifndef __CODETAB_H__
 #define __CODRTAB_H__

 const unsigned char F16x16[] =
 {
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,/*" ",0*/
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,/*" ",0*/

 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,/*" ",0*/
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,/*" ",0*/

 0x00,0xFE,0x92,0x92,0xFE,0x92,0x92,0xFE,0x00,0x42,0x4A,0xD2,0x6A,0x46,0xC0,0x00,
 0x40,0xC4,0x44,0x44,0x3F,0x24,0x24,0x24,0x00,0x40,0x80,0x7F,0x00,0x01,0x00,0x00,/*"野",0*/
 0x00,0x00,0xC0,0x38,0x00,0x00,0x00,0xFF,0x00,0x00,0x40,0x20,0x18,0x00,0x00,0x00,
 0x80,0x81,0x40,0x20,0x10,0x0C,0x03,0x00,0x03,0x0C,0x10,0x20,0x40,0x80,0x80,0x00,/*"火",1*/
 0x24,0x24,0xA4,0xFE,0xA3,0x22,0x00,0x22,0xCC,0x00,0x00,0xFF,0x00,0x00,0x00,0x00,
 0x08,0x06,0x01,0xFF,0x00,0x01,0x04,0x04,0x04,0x04,0x04,0xFF,0x02,0x02,0x02,0x00,/*"科",2*/
 0x10,0x10,0x10,0xFF,0x10,0x90,0x08,0x88,0x88,0x88,0xFF,0x88,0x88,0x88,0x08,0x00,
 0x04,0x44,0x82,0x7F,0x01,0x80,0x80,0x40,0x43,0x2C,0x10,0x28,0x46,0x81,0x80,0x00,/*"技",3*/



 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,/*" ",6*/
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,/*" ",6*/
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,/*" ",7*/
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,/*" ",7*/

 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,/*" ",0*/
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,/*" ",0*/
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,/*" ",0*/
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,/*" ",0*/

 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*/

 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,/*" ",6*/
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,/*" ",6*/
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,/*" ",7*/
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,/*" ",7*/
 };

 /************************************6*8的点阵************************************/
 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
 };
 /****************************************8*16的点阵************************************/
 const unsigned char F8X16[] = {
 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,//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
 0x00,0x00,0x00,0x00,0xFF,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
 };

 const unsigned char BMP1[] = {
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xE0,
 0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0xC0,0xE0,0xE0,0x70,0x70,0x70,0xE0,0xC0,0x80,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 0xFF,0xFF,0xF0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xF8,0xF8,0xF8,0x78,0x78,0x78,0xF8,
 0xF8,0xF8,0xF8,0x78,0x78,0x78,0xF8,0xF8,0xF8,0xF8,0x00,0xF8,0xF8,0x78,0x78,0x78,
 0x78,0x78,0x78,0x78,0x78,0xF8,0xF8,0xF8,0xF8,0xF8,0xF8,0x00,0x00,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFE,
 0xFE,0xFE,0xFE,0xFE,0x06,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x70,0xE0,0x80,
 0x00,0x00,0x00,0x00,0x3E,0xFF,0xC1,0xFF,0x7F,0x1F,0x7F,0xE6,0xE3,0xFF,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0xE0,0xFE,
 0xFF,0xFF,0xFF,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0xFF,0xFF,0xF0,0xE0,0xE0,0xFF,
 0xFF,0xFF,0xFF,0xE0,0xE0,0xE0,0xFF,0xFF,0xFF,0xFF,0x00,0x00,0x60,0xF8,0xF8,0xF8,
 0xF8,0xE0,0xF8,0xFE,0xFF,0x7F,0x1F,0x07,0x03,0x01,0x00,0x00,0x00,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0xFC,0xFC,0xFC,0xFC,0xFC,0x18,0x00,0x00,0x00,0x00,0xFF,
 0xFF,0xFF,0xFF,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0xC0,0xE0,0xFC,0xFF,0xFF,
 0x00,0x00,0x00,0x80,0x00,0x00,0x01,0x03,0x03,0x03,0x03,0x03,0x01,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x80,0xC0,0xE0,0xF0,0xF8,0xFE,0xFF,0xFF,0xFF,0xFF,
 0xFF,0xFF,0x7F,0x0F,0x00,0x00,0x00,0x00,0x00,0x00,0xE0,0xC0,0x00,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0xFF,0xFF,0xFF,0xC1,0xC1,0xFF,
 0xFF,0xFF,0xFF,0xC1,0xC1,0xC1,0xFF,0xFF,0xFF,0xFF,0xF8,0xF8,0xF8,0xF8,0xF9,0xF1,
 0xF3,0xFF,0xFF,0xFF,0xFF,0xFF,0xF6,0xF0,0xF0,0xF0,0xF8,0xF8,0x38,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0xF0,0xFF,0xFF,0xFF,0xFF,0x07,0x00,0x00,0x00,0x00,0x00,0xFF,
 0xFF,0xFF,0xFF,0xFF,0xF0,0x00,0x00,0x00,0xFC,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
 0xE0,0xC0,0xE0,0xFF,0xFF,0xF8,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 0x00,0x00,0x80,0xF0,0xFC,0xFE,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x3F,0x8F,
 0xE7,0xF3,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xF0,0xFF,0xFF,0xFE,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xC7,0xC7,0xC7,0xC7,0x87,0x83,0x87,
 0xFF,0xFF,0xFF,0x83,0x83,0x87,0x87,0xC7,0xC7,0xC7,0x05,0x01,0x01,0x01,0x00,0x00,
 0x00,0xFF,0xFF,0xFF,0xFF,0x00,0x78,0x7F,0x7F,0x7F,0x3F,0x01,0x00,0x00,0x00,0x00,
 0x00,0x00,0x00,0x0E,0x0F,0x0F,0x1F,0x1F,0x00,0x00,0x00,0x00,0x00,0xC0,0xFC,0xFF,
 0xFF,0xFF,0x3F,0xFF,0xFF,0xFE,0xE0,0x80,0x00,0x00,0x01,0x07,0x07,0x0F,0x0F,0x1F,
 0x1F,0x1F,0x0F,0x0F,0x07,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 0x00,0xF8,0xFF,0x7F,0x7F,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xC1,0x7C,0xFF,
 0xFF,0xFF,0xF8,0xF0,0xE0,0xF0,0xF0,0xFC,0xFE,0xFF,0xFF,0xFF,0x7F,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x07,0x07,0x07,0x07,0x07,0x07,0x07,
 0xFF,0xFF,0xFF,0x07,0x07,0x87,0x87,0x87,0xC7,0xC7,0xC0,0x00,0x00,0x00,0x00,0x00,
 0x00,0xFF,0xFF,0xFF,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0xC0,0xE0,0xF8,0xFE,0xFF,0xFF,0x3F,
 0x0F,0x01,0x00,0x03,0x1F,0x7F,0xFF,0xFF,0xFC,0xF8,0xE0,0xC0,0x80,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x07,0x0F,0x1F,0x3F,0x7F,0xFF,0xFF,0xFE,0xFF,
 0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x7F,0x7F,0x3F,0x0F,0x03,0x00,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0E,0x7E,0x7E,0x7E,0x3E,0x3E,0x3E,0x3E,0x1E,
 0x1F,0x1F,0x1F,0x1F,0x1F,0x0F,0x0F,0x0F,0x0F,0x0F,0x03,0x30,0xF0,0xF0,0xE0,0xE0,
 0xF0,0xFF,0xFF,0xFF,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xC0,
 0xC0,0xE0,0xF0,0xF0,0xF8,0xFC,0xFE,0xFE,0xFF,0x7F,0x1F,0x0F,0x07,0x03,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x03,0x07,0x1F,0x3F,0x7F,0x7F,0xFF,0xFE,0xFC,
 0xFC,0xF8,0xF8,0xF0,0x70,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x01,
 0x01,0x01,0x01,0x01,0x01,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x07,0x07,0x07,
 0x03,0x03,0x03,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 0x01,0x03,0x07,0x07,0x07,0x03,0x01,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x03,
 0x03,0x07,0x03,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 };

 #endif

22.4.2

FSP配置

因为启明6M5/2L1开发板采用硬件SPI的方式，而启明4M2开发板采用GPIO模拟SPI的方式进行实验，所以FPS的配置也是不同的。

注解:关于硬件SPI与软件SPI的区别：

软件SPI：软件SPI需要用IO口模拟时序，这个模拟过程全部由CPU完成，为了能稳定的存入数据，可能插入软件延时，这个时间在读取数据量小的情况下不明显，但是基本上你在读取过程中其他非中断、非异常程序是无法得到执行的。

2.硬件SPI：硬件SPI数据存储过程是不需要CPU参与的，程序中配置好SPI的访问时序，开启中断，CPU就可以在中断函数中搬移数据，省下了软件模拟IO的存取时间。

下面以启明6M5开发板为例，进行FSP配置。

首先打开 “41_SPI_OLED” 项目的 FSP 配置界面进行配置。

先配置CS,D/C引脚，在 FSP 配置界面里面点开 “Pins”-> “Poets”-> “P3”-> “P301” ,然后配置CS对应的IO引脚的 “Mode” 属性配置为 “Output mode (Initial High)”，表示该引脚默认输出高电平，其他的属性默认即可。 D/C引脚也是按照这样进行配置。启明2L1开发板与其类似，只是需要配置的引脚号不一样。配置步骤如下图所示：

配置SPI，在 FSP 配置界面里面点开 “Pins”-> “Peripherals”-> “Connectivity:SPI”-> “SPI0”，选择A组并使能，启明2L1开发板与其类似，只是选择的SPI模块为SPI1,A组。配置步骤如下图所示：

接着在 FSP 配置界面里面依次点击 “Stacks” -> “New Stack” -> “Connectivity” -> “SPI” 来添加SPI模块，配置步骤如下图所示：

按照如下图所示对 SPI 模块属性进行配置

SPI 模块的属性介绍如下：

SPI 属性介绍

SPI属性	描述
Name	模块实例名。设置为g_spi0_flash
Channel	通道。这里选择spi0
Receive Interrupt Priority	接收中断优先级
Transmit Buffer Empty Interrupt Priority	发送缓存区空中断优先级
Transfer Complete Interrupt Priority	发送完成中断优先级
Error Interrupt Priority	错误中断优先级
Operating Mode	操作模式。可选SPI主机或从机
Clock Phase	SPI时钟相位（设置CPHA）
Clock Polarity	SPI时钟极性（设置CPOL）
Mode Fault Error	模式错误检测。检测主从模式冲突
Bit Order	位时序。MSB或LSB
Callback	中断回调函数。设置为spi_flash_callback
SPI Mode	SPI 模式。设置为SPI Operation
Full or Transmit Only Mode	全双工或仅发送模式选择
Slave Select Polarity	从机选择引脚极性。一般是低电平有效
Select SSL(Slave Select)	从机选择信号
MOSI Idle State	总线空闲时 MOSI 电平
Parity Mode	极性模式
Byte Swapping	字节交换模式
Bitrate	比特率
Clock Delay	时钟延迟
SSL Negation Delay	SSL失效延迟
Next Access Delay	下一次访问延迟

在 FSP 配置界面里面点开 “Pins”-> “Poets”-> “P0”-> “P007” ,然后配置IO引脚的 “Mode” 属性配置为 “Output mode (Initial High)”，表示该引脚默认输出高电平，其他的属性默认即可。其他三个引脚也是按照这样进行配置。配置步骤如下图所示：

配置完成之后可以按下快捷键“Ctrl + S”保存，最后点右上角的“Generate Project Content”按钮，让软件自动生成配置代码即可。

22.4.3.对于启明6M5/2L1开发板的 “41_SPI_OLED” 工程：

当使用SPI接口时，我们通过 R_SPI_Write 这个函数，可以直接给我们的OLED模块发送指令，进行相应的操作。 R_SPI_Write 的函数原型如下：

fsp_err_t R_SPI_Write (spi_ctrl_t * const    p_api_ctrl,
                    void const          * p_src,
                    uint32_t const        length,
                    spi_bit_width_t const bit_width)

发送一个数组的数据，p_src 是指需要发送的数据，length 是指发送数据的个数，bit_width 是指每个要发送的数据的位宽。

中断回调函数的原型已经在hal_data.h中进行了声明,我们只需要对其进行定义即可。

/** Callback used by SPI Instance. */
#ifndef spi0_callback
void spi0_callback(spi_callback_args_t * p_args);
#endif

在本次实验中，在中断回调函数中，我们可以通过检测发送完成事件来判断SPI传输是否完成，并且还封装了一个发送超时等待函数。

中断回调函数

/**
* @brief  中断回调函数
* @param  SPI中断回调参数指针
* @retval 无
*/
void spi0_callback(spi_callback_args_t *p_args)
{
  if(p_args->event == SPI_EVENT_TRANSFER_COMPLETE)
  {
    g_transfer_complete = true;
  }
}
/**
* @brief  发送超时等待函数
* @param  无
* @retval 无
*/
static bool SPIWaitgtc(void)
{
  unsigned short wTimeout = 100;
  while(!g_transfer_complete && wTimeout)
  {
      R_BSP_SoftwareDelay(1u, BSP_DELAY_UNITS_MICROSECONDS);
      wTimeout--;
  }
  g_transfer_complete = false;
  if(g_transfer_complete==false && wTimeout==0)
      return false;
  return true;
}

当我们需要对OLED发送命令/数据时，通过将D/C引脚配置成低电平来确定发送的为命令指令，而需要发送数据时，将D/C引脚配置成高电平。

OLED发送命令/数据函数

void OLED_WrCmd(unsigned char cmd)
{
  OLED_DC_Clr();
  R_SPI_Write(&g_spi0_ctrl,&cmd,1,SPI_BIT_WIDTH_8_BITS);
  SPIWaitgtc();
}
void OLED_WrDat(unsigned char dat)
{
  OLED_DC_Set();
  R_SPI_Write(&g_spi0_ctrl,&dat,1,SPI_BIT_WIDTH_8_BITS);
  SPIWaitgtc();
}

对于CS与D/C引脚的操作我们也是封装了宏

#define OLED_CS_Pin       BSP_IO_PORT_03_PIN_01
#define OLED_CS_Clr()     R_IOPORT_PinWrite(&g_ioport_ctrl, OLED_CS_Pin, BSP_IO_LEVEL_LOW)
#define OLED_CS_Set()     R_IOPORT_PinWrite(&g_ioport_ctrl, OLED_CS_Pin, BSP_IO_LEVEL_HIGH)

#define OLED_DC_Pin       BSP_IO_PORT_03_PIN_02
#define OLED_DC_Clr()     R_IOPORT_PinWrite(&g_ioport_ctrl, OLED_DC_Pin, BSP_IO_LEVEL_LOW)
#define OLED_DC_Set()     R_IOPORT_PinWrite(&g_ioport_ctrl, OLED_DC_Pin, BSP_IO_LEVEL_HIGH)

最后我们来看一下OLED的初始化，开头是通过 R_SPI_Open 函数来启动SPI0，接着是对OLED的寄存器进行操作，这些参数不需要去了解，默认也不需要修改。

OLED初始化

void OLED_Init(void)
{
  fsp_err_t err = FSP_SUCCESS;
  err = R_SPI_Open(&g_spi0_ctrl,&g_spi0_cfg);//打开SPI模块
  assert(FSP_SUCCESS == err);

  R_BSP_SoftwareDelay(500u, BSP_DELAY_UNITS_MILLISECONDS);//延时500ms

  OLED_CS_Clr();

  OLED_WrCmd(0xae);
  OLED_WrCmd(0xae);//--turn off oled panel
  OLED_WrCmd(0x00);//---set low column address
  OLED_WrCmd(0x10);//---set high column address
  OLED_WrCmd(0x40);//--set start line address  Set Mapping RAM Display Start Line (0x00~0x3F)
  OLED_WrCmd(0x81);//--set contrast control register
  OLED_WrCmd(0xcf); // Set SEG Output Current Brightness
  OLED_WrCmd(0xa1);//--Set SEG/Column Mapping     0xa0,0xa1
  OLED_WrCmd(0xc8);//Set COM/Row Scan Direction   0xc0,0xc8
  OLED_WrCmd(0xa6);//--set normal display
  OLED_WrCmd(0xa8);//--set multiplex ratio(1 to 64)
  OLED_WrCmd(0x3f);//--1/64 duty
  OLED_WrCmd(0xd3);//-set display offset      Shift Mapping RAM Counter (0x00~0x3F)
  OLED_WrCmd(0x00);//-not offset
  OLED_WrCmd(0xd5);//--set display clock divide ratio/oscillator frequency
  OLED_WrCmd(0x80);//--set divide ratio, Set Clock as 100 Frames/Sec
  OLED_WrCmd(0xd9);//--set pre-charge period
  OLED_WrCmd(0xf1);//Set Pre-Charge as 15 Clocks & Discharge as 1 Clock
  OLED_WrCmd(0xda);//--set com pins hardware configuration
  OLED_WrCmd(0x12);
  OLED_WrCmd(0xdb);//--set vcomh
  OLED_WrCmd(0x40);//Set VCOM Deselect Level
  OLED_WrCmd(0x20);//-Set Page Addressing Mode (0x00/0x01/0x02)
  OLED_WrCmd(0x02);//
  OLED_WrCmd(0x8d);//--set Charge Pump enable/disable
  OLED_WrCmd(0x14);//--set(0x10) disable
  OLED_WrCmd(0xa4);// Disable Entire Display On (0xa4/0xa5)
  OLED_WrCmd(0xa6);// Disable Inverse Display On (0xa6/a7)
  OLED_WrCmd(0xaf);//--turn on oled panel

  OLED_Fill(0x00);//清屏
  OLED_SetPos(0,0);
}

22.4.4.对于启明4M2开发板的 “41_SPI_OLED” 工程：

对于四个要用来模拟SPI的引脚，我们也是封装了宏

#define SPI_SCK_Pin       BSP_IO_PORT_06_PIN_01
#define SPI_SCK_LOW()     R_IOPORT_PinWrite(&g_ioport_ctrl, SPI_SCK_Pin, BSP_IO_LEVEL_LOW)
#define SPI_SCK_HIGH()    R_IOPORT_PinWrite(&g_ioport_ctrl, SPI_SCK_Pin, BSP_IO_LEVEL_HIGH)

#define SPI_MOSI_Pin       BSP_IO_PORT_06_PIN_02
#define SPI_MOSI_LOW()     R_IOPORT_PinWrite(&g_ioport_ctrl, SPI_MOSI_Pin, BSP_IO_LEVEL_LOW)
#define SPI_MOSI_HIGH()    R_IOPORT_PinWrite(&g_ioport_ctrl, SPI_MOSI_Pin, BSP_IO_LEVEL_HIGH)

#define SPI_CS_Pin       BSP_IO_PORT_00_PIN_07
#define SPI_CS_LOW()      R_IOPORT_PinWrite(&g_ioport_ctrl, SPI_CS_Pin, BSP_IO_LEVEL_LOW)
#define SPI_CS_HIGH()     R_IOPORT_PinWrite(&g_ioport_ctrl, SPI_CS_Pin, BSP_IO_LEVEL_HIGH)

#define SPI_DC_Pin       BSP_IO_PORT_00_PIN_08
#define SPI_DC_LOW()      R_IOPORT_PinWrite(&g_ioport_ctrl, SPI_DC_Pin, BSP_IO_LEVEL_LOW)
#define SPI_DC_HIGH()     R_IOPORT_PinWrite(&g_ioport_ctrl, SPI_DC_Pin, BSP_IO_LEVEL_HIGH)

根据SSD1306的时序图，在SCLK信号为地电平的时候，改变MOSI的电平状态，输出完数据后将其拉高，延时一段时间后进行拉低SCLK,如此循环8次便可将一字节的数据传输出去。

OLED模拟SPI发送函数

/**
* @brief  模拟SPI发送数据函数
* @param  data:待发送数据
* @retval 无
*/
void SPI_WriteByte(unsigned char data)
{
  unsigned char i = 0;
  unsigned char temp = 0;
  for(i=0; i<8; i++)
  {
    temp = ((data&0x80)==0x80)? 1:0;
    data = data<<1;
    SPI_SCK_LOW();
    if(temp)
    {
      SPI_MOSI_HIGH();
    }
    else
    {
      SPI_MOSI_LOW();
    }
    R_BSP_SoftwareDelay(1u, BSP_DELAY_UNITS_MICROSECONDS);
    SPI_SCK_HIGH();
    R_BSP_SoftwareDelay(1u, BSP_DELAY_UNITS_MICROSECONDS);
  }
  SPI_SCK_HIGH();
}

同样的，模拟的OLED发送指令/数据函数与OLED发送指令数据函数类似，如下

OLED发送命令/数据函数

void OLED_WrCmd(unsigned char cmd)//写命令
{
  SPI_DC_LOW();
  SPI_WriteByte(cmd);
}
void OLED_WrDat(unsigned char dat)//写数据
{
  SPI_DC_HIGH();
  SPI_WriteByte(dat);
}

OLED的初始化，启明4M2开发板与启明6M5/2L1类似。

OLED初始化

void OLED_Init(void)
{
  SPI_CS_HIGH();
  SPI_SCK_HIGH();
  R_BSP_SoftwareDelay(100u, BSP_DELAY_UNITS_MICROSECONDS);

  SPI_CS_LOW();//拉高CS后拉低CS，选中OLED

  OLED_WrCmd(0xae);
  OLED_WrCmd(0xae);//--turn off oled panel
  OLED_WrCmd(0x00);//---set low column address
  OLED_WrCmd(0x10);//---set high column address
  OLED_WrCmd(0x40);//--set start line address  Set Mapping RAM Display Start Line (0x00~0x3F)
  OLED_WrCmd(0x81);//--set contrast control register
  OLED_WrCmd(0xcf); // Set SEG Output Current Brightness
  OLED_WrCmd(0xa1);//--Set SEG/Column Mapping     0xa0,0xa1
  OLED_WrCmd(0xc8);//Set COM/Row Scan Direction   0xc0,0xc8
  OLED_WrCmd(0xa6);//--set normal display
  OLED_WrCmd(0xa8);//--set multiplex ratio(1 to 64)
  OLED_WrCmd(0x3f);//--1/64 duty
  OLED_WrCmd(0xd3);//-set display offset      Shift Mapping RAM Counter (0x00~0x3F)
  OLED_WrCmd(0x00);//-not offset
  OLED_WrCmd(0xd5);//--set display clock divide ratio/oscillator frequency
  OLED_WrCmd(0x80);//--set divide ratio, Set Clock as 100 Frames/Sec
  OLED_WrCmd(0xd9);//--set pre-charge period
  OLED_WrCmd(0xf1);//Set Pre-Charge as 15 Clocks & Discharge as 1 Clock
  OLED_WrCmd(0xda);//--set com pins hardware configuration
  OLED_WrCmd(0x12);
  OLED_WrCmd(0xdb);//--set vcomh
  OLED_WrCmd(0x40);//Set VCOM Deselect Level
  OLED_WrCmd(0x20);//-Set Page Addressing Mode (0x00/0x01/0x02)
  OLED_WrCmd(0x02);//
  OLED_WrCmd(0x8d);//--set Charge Pump enable/disable
  OLED_WrCmd(0x14);//--set(0x10) disable
  OLED_WrCmd(0xa4);// Disable Entire Display On (0xa4/0xa5)
  OLED_WrCmd(0xa6);// Disable Inverse Display On (0xa6/a7)
  OLED_WrCmd(0xaf);//--turn on oled panel

  OLED_Fill(0x00);
  OLED_SetPos(0,0);
}

22.4.5.hal_entry函数

在hal_entry函数中，初始化OLED。

hal_entry.c

void hal_entry(void)
{
    /* TODO: add your own code here */
  unsigned char i;
  extern const unsigned char BMP1[];
  OLED_Init();//初始化
  while(1)
  {
    OLED_Fill(0xff);//填充屏幕
    R_BSP_SoftwareDelay(2u, BSP_DELAY_UNITS_SECONDS);
    OLED_CLS();//清屏
    for(i=0; i<8; i++)//通过点阵显示汉字 -- i表示子表中汉字的位置
    {
      OLED_16x16CN(i*16,0,i);
      OLED_16x16CN(i*16,4,i+8);
    }
    R_BSP_SoftwareDelay(2u, BSP_DELAY_UNITS_SECONDS);
    OLED_CLS();
    //显示不同字体大小的英文
    OLED_6x8Str(0,1,(unsigned char *)"www.embedfire.com");
    OLED_8x16Str(0,2,(unsigned char *)"Wildfire Tech");
    OLED_8x16Str(10,4,(unsigned char *)"SPI-OLED");
    R_BSP_SoftwareDelay(4u, BSP_DELAY_UNITS_SECONDS);
    OLED_CLS();
    //显示图片
    OLED_BMP(0,0,128,8,(unsigned char *)BMP1);
    R_BSP_SoftwareDelay(4u, BSP_DELAY_UNITS_SECONDS);
  }
#if BSP_TZ_SECURE_BUILD
    /* Enter non-secure code */
    R_BSP_NonSecureEnter();
#endif
}

在循环中点亮屏幕，2秒后熄灭屏幕，然后使用 OLED_16x16CN 函数显示中文，使用 OLED_6x8Str 函数测试6*8字符，使用 OLED_8x16Str函数测试8*16字符，最后只用 OLED_BMP 函数测试BMP位图显示。

把代码下载后，可以看到OLED屏幕上由清屏-> 显示中文 -> 显示英文 -> 显示图片的顺序循环显示。

启明6M5/2L1开发板 SPI_OLED 实验现象：

启明4M2开发板 SPI_OLED 实验现象：

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