OLED显示屏调试（STM32标准库学习笔记）

在上一章中我们学习了STM32标准库中GPIO输入的相关知识掌握了如何通过读取引脚电平来获取外部信号例如按键状态的检测。然而仅仅能够读取输入信号还不够在实际的嵌入式开发中我们往往还需要将程序的运行状态、传感器数据等信息直观地展示出来这就离不开显示设备。本章将介绍一种在电子设计中非常常见的显示模块——OLED显示屏并围绕它的调试与驱动展开讲解帮助大家掌握从硬件连接到代码实现再到调试验证的完整流程。如果觉得有收获可以为我的文章点点小赞这将激励我创作更好的内容谢谢一、OLED显示屏调试1.1 调试方式串口调试通过串口通信将调试信息发送到电脑端电脑使用串口助手显示调试信息显示屏调试直接将显示屏连接到单片机将调试信息打印在显示屏上Keil调试模式借助Keil软件的调试模式可使用单步运行、设置断点、查看寄存器及变量等功能1.2 OLED简介OLEDOrganic Light Emitting Diode有机发光二极管OLED显示屏性能优异的新型显示屏具有功耗低、相应速度快、宽视角、轻薄柔韧等特点0.96寸OLED模块小巧玲珑、占用接口少、简单易用是电子设计中非常常见的显示屏模块供电3~5.5V通信协议I2C/SPI分辨率128*641.3 硬件电路1.4 OLED驱动函数1.5 实例一4.1.1 OLED显示屏江科大老师给的OLED代码模块OLED_Font.h↓-----------------------------#ifndef __OLED_FONT_H #define __OLED_FONT_H /OLED字模库宽8像素高16像素/ const uint8_t OLED_F8x16[][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,//amp; 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,//lt; 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,//gt; 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 }; #endif-----------------------------OLED.h↓-----------------------------#ifndef __OLED_H #define __OLED_H void OLED_Init(void); void OLED_Clear(void); void OLED_ShowChar(uint8_t Line, uint8_t Column, char Char); void OLED_ShowString(uint8_t Line, uint8_t Column, char *String); void OLED_ShowNum(uint8_t Line, uint8_t Column, uint32_t Number, uint8_t Length); void OLED_ShowSignedNum(uint8_t Line, uint8_t Column, int32_t Number, uint8_t Length); void OLED_ShowHexNum(uint8_t Line, uint8_t Column, uint32_t Number, uint8_t Length); void OLED_ShowBinNum(uint8_t Line, uint8_t Column, uint32_t Number, uint8_t Length); #endif-----------------------------OLED.c↓-----------------------------#include stm32f10x.h #include OLED_Font.h /引脚配置使用时根据需要修改引脚/ #define OLED_W_SCL(x) GPIO_WriteBit(GPIOB, GPIO_Pin_8, (BitAction)(x)) #define OLED_W_SDA(x) GPIO_WriteBit(GPIOB, GPIO_Pin_9, (BitAction)(x)) /引脚初始化/ void OLED_I2C_Init(void) { RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE); GPIO_InitTypeDef GPIO_InitStructure; GPIO_InitStructure.GPIO_Mode GPIO_Mode_Out_OD;//引脚为开漏输出模式 GPIO_InitStructure.GPIO_Speed GPIO_Speed_50MHz; //记得检查引脚是否正确 GPIO_InitStructure.GPIO_Pin GPIO_Pin_8; GPIO_Init(GPIOB, amp;GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin GPIO_Pin_9; GPIO_Init(GPIOB, amp;GPIO_InitStructure); OLED_W_SCL(1); OLED_W_SDA(1); } /** brief I2C开始 param 无 retval 无 */ void OLED_I2C_Start(void) { OLED_W_SDA(1); OLED_W_SCL(1); OLED_W_SDA(0); OLED_W_SCL(0); } /** brief I2C停止 param 无 retval 无 */ void OLED_I2C_Stop(void) { OLED_W_SDA(0); OLED_W_SCL(1); OLED_W_SDA(1); } /** brief I2C发送一个字节 param Byte 要发送的一个字节 retval 无 */ void OLED_I2C_SendByte(uint8_t Byte) { uint8_t i; for (i 0; i 8; i) { OLED_W_SDA(!!(Byte (0x80 i))); OLED_W_SCL(1); OLED_W_SCL(0); } OLED_W_SCL(1); //额外的一个时钟不处理应答信号 OLED_W_SCL(0); } /** brief OLED写命令 param Command 要写入的命令 retval 无 */ void OLED_WriteCommand(uint8_t Command) { OLED_I2C_Start(); OLED_I2C_SendByte(0x78); //从机地址 OLED_I2C_SendByte(0x00); //写命令 OLED_I2C_SendByte(Command); OLED_I2C_Stop(); } /** brief OLED写数据 param Data 要写入的数据 retval 无 */ void OLED_WriteData(uint8_t Data) { OLED_I2C_Start(); OLED_I2C_SendByte(0x78); //从机地址 OLED_I2C_SendByte(0x40); //写数据 OLED_I2C_SendByte(Data); OLED_I2C_Stop(); } /** brief OLED设置光标位置 param Y 以左上角为原点向下方向的坐标范围0~7 param X 以左上角为原点向右方向的坐标范围0~127 retval 无 */ void OLED_SetCursor(uint8_t Y, uint8_t X) { OLED_WriteCommand(0xB0 | Y); //设置Y位置 OLED_WriteCommand(0x10 | ((X 0xF0) 4)); //设置X位置高4位 OLED_WriteCommand(0x00 | (X 0x0F)); //设置X位置低4位 } /** brief OLED清屏 param 无 retval 无 */ void OLED_Clear(void) { uint8_t i, j; for (j 0; j 8; j) { OLED_SetCursor(j, 0); for(i 0; i 128; i) { OLED_WriteData(0x00); } } } /** brief OLED显示一个字符 param Line 行位置范围1~4 param Column 列位置范围1~16 param Char 要显示的一个字符范围ASCII可见字符 retval 无 */ void OLED_ShowChar(uint8_t Line, uint8_t Column, char Char) { uint8_t i; OLED_SetCursor((Line - 1) * 2, (Column - 1) * 8); //设置光标位置在上半部分 for (i 0; i 8; i) { OLED_WriteData(OLED_F8x16[Char - ][i]); //显示上半部分内容 } OLED_SetCursor((Line - 1) * 2 1, (Column - 1) * 8); //设置光标位置在下半部分 for (i 0; i 8; i) { OLED_WriteData(OLED_F8x16[Char - ][i 8]); //显示下半部分内容 } } /** brief OLED显示字符串 param Line 起始行位置范围1~4 param Column 起始列位置范围1~16 param String 要显示的字符串范围ASCII可见字符 retval 无 */ void OLED_ShowString(uint8_t Line, uint8_t Column, char *String) { uint8_t i; for (i 0; String[i] ! \0; i) { OLED_ShowChar(Line, Column i, String[i]); } } /** brief OLED次方函数 retval 返回值等于X的Y次方 */ uint32_t OLED_Pow(uint32_t X, uint32_t Y) { uint32_t Result 1; while (Y--) { Result * X; } return Result; } /** brief OLED显示数字十进制正数 param Line 起始行位置范围1~4 param Column 起始列位置范围1~16 param Number 要显示的数字范围0~4294967295 param Length 要显示数字的长度范围1~10 retval 无 */ void OLED_ShowNum(uint8_t Line, uint8_t Column, uint32_t Number, uint8_t Length) { uint8_t i; for (i 0; i Length; i) { OLED_ShowChar(Line, Column i, Number / OLED_Pow(10, Length - i - 1) % 10 0); } } /** brief OLED显示数字十进制带符号数 param Line 起始行位置范围1~4 param Column 起始列位置范围1~16 param Number 要显示的数字范围-2147483648~2147483647 param Length 要显示数字的长度范围1~10 retval 无 */ void OLED_ShowSignedNum(uint8_t Line, uint8_t Column, int32_t Number, uint8_t Length) { uint8_t i; uint32_t Number1; if (Number 0) { OLED_ShowChar(Line, Column, ); Number1 Number; } else { OLED_ShowChar(Line, Column, -); Number1 -Number; } for (i 0; i Length; i) { OLED_ShowChar(Line, Column i 1, Number1 / OLED_Pow(10, Length - i - 1) % 10 0); } } /** brief OLED显示数字十六进制正数 param Line 起始行位置范围1~4 param Column 起始列位置范围1~16 param Number 要显示的数字范围0~0xFFFFFFFF param Length 要显示数字的长度范围1~8 retval 无 */ void OLED_ShowHexNum(uint8_t Line, uint8_t Column, uint32_t Number, uint8_t Length) { uint8_t i, SingleNumber; for (i 0; i Length; i) { SingleNumber Number / OLED_Pow(16, Length - i - 1) % 16; if (SingleNumber 10) { OLED_ShowChar(Line, Column i, SingleNumber 0); } else { OLED_ShowChar(Line, Column i, SingleNumber - 10 A); } } } /** brief OLED显示数字二进制正数 param Line 起始行位置范围1~4 param Column 起始列位置范围1~16 param Number 要显示的数字范围0~1111 1111 1111 1111 param Length 要显示数字的长度范围1~16 retval 无 */ void OLED_ShowBinNum(uint8_t Line, uint8_t Column, uint32_t Number, uint8_t Length) { uint8_t i; for (i 0; i Length; i) { OLED_ShowChar(Line, Column i, Number / OLED_Pow(2, Length - i - 1) % 2 0); } } /** brief OLED初始化 param 无 retval 无 */ void OLED_Init(void) { uint32_t i, j; for (i 0; i 1000; i) //上电延时 { for (j 0; j 1000; j); } OLED_I2C_Init(); //端口初始化 OLED_WriteCommand(0xAE); //关闭显示 OLED_WriteCommand(0xD5); //设置显示时钟分频比/振荡器频率 OLED_WriteCommand(0x80); OLED_WriteCommand(0xA8); //设置多路复用率 OLED_WriteCommand(0x3F); OLED_WriteCommand(0xD3); //设置显示偏移 OLED_WriteCommand(0x00); OLED_WriteCommand(0x40); //设置显示开始行 OLED_WriteCommand(0xA1); //设置左右方向0xA1正常 0xA0左右反置 OLED_WriteCommand(0xC8); //设置上下方向0xC8正常 0xC0上下反置 OLED_WriteCommand(0xDA); //设置COM引脚硬件配置 OLED_WriteCommand(0x12); OLED_WriteCommand(0x81); //设置对比度控制 OLED_WriteCommand(0xCF); OLED_WriteCommand(0xD9); //设置预充电周期 OLED_WriteCommand(0xF1); OLED_WriteCommand(0xDB); //设置VCOMH取消选择级别 OLED_WriteCommand(0x30); OLED_WriteCommand(0xA4); //设置整个显示打开/关闭 OLED_WriteCommand(0xA6); //设置正常/倒转显示 OLED_WriteCommand(0x8D); //设置充电泵 OLED_WriteCommand(0x14); OLED_WriteCommand(0xAF); //开启显示 OLED_Clear(); //OLED清屏 }-----------------------------OLED显示屏测试main.c↓-----------------------------#include stm32f10x.h // Device header #include Delay.h #include OLED.h int main(void) { OLED_Init(); OLED_ShowChar(1,1,X); OLED_ShowString(1,3,HelloWorld!); OLED_ShowNum(2,1,12345,5); OLED_ShowSignedNum(2,7,-22,2); OLED_ShowHexNum(3,1,0xAA55,4); OLED_ShowBinNum(4,1,0xABCD,16); // OLED_Clear(); while(1) { } }-----------------------------1.6 Keil调试模式二、总结本文围绕OLED显示屏的调试与驱动展开系统梳理了从调试方式、硬件原理到代码实现与Keil调试的完整流程主要收获如下1. 调试方式的选择串口调试适合输出大量日志信息便于在电脑端集中分析显示屏调试则能直观展示运行状态适合现场观察Keil调试模式支持单步运行、断点设置以及寄存器与变量的实时查看是定位复杂逻辑问题的有力工具。三种方式各有侧重实际开发中常配合使用。2. OLED显示屏的特性OLED有机发光二极管显示屏具有功耗低、响应速度快、宽视角、轻薄柔韧等优点0.96寸模块小巧易用、占用接口少供电范围3~5.5V支持I2C/SPI通信分辨率为128*64非常适合嵌入式项目的人机交互显示。3. Keil调试的实践借助Keil的调试模式可以直观观察程序运行流程、变量变化和寄存器状态帮助快速定位显示异常或逻辑错误是嵌入式开发中不可或缺的调试手段。总的来说OLED显示屏的调试并不复杂关键在于熟练运用调试工具。掌握这些内容后无论是显示传感器数据、系统状态还是交互菜单都能得心应手为后续更复杂的嵌入式应用打下坚实基础。都看到这了点点赞吧