STM32 +合宙1.54“ 电子墨水屏（e-paper）驱动显示示例

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• 📍相关篇《Arduino框架下ESP32/ESP8266+合宙1.54“ 电子墨水屏（e-paper）驱动显示示例》
• 🔖程序是从GooDisplay品牌下同型号规格墨水屏的示例程序参考Arduino框架下的驱动显示代码修改得来的。
• 📍移植参考程序：（GooDisplay）https://www.good-display.cn/product/380.html
• 📌同类型其他微雪品牌的相关资料参考：https://www.waveshare.net/wiki/1.54inch_e-Paper_Module

🔖目前仅仅是实现刚刚点亮屏幕，点亮屏幕是迈出的重要的第一步，基于标准库，使用STM32f103芯片，软件SPI方式。

• 🐛bug显示是：上下反置的效果，合宙1.54“ 电子墨水屏（e-paper）没有对应的手册可查询，只能参考Arduino驱动代码进行查找进行修复。测试使用局部刷新指令，来刷全局可以部分显示正常。问题可能还是在全局指令上。
  
  

📝GooDisplay参考代码修改位置

• 🌿初始化函数：EPD_HW_Init（）

const unsigned char lut_full_update[] =
{0x02, 0x02, 0x01, 0x11, 0x12, 0x12, 0x22, 0x22, 0x66, 0x69, 0x69, 0x59, 0x58, 0x99, 0x99, 0x88, 0x00, 0x00, 0x00, 0x00, 0xF8, 0xB4, 0x13, 0x51, 0x35, 0x51, 0x51, 0x19, 0x01, 0x00
};
//局部刷新指令
const unsigned char lut_partial_update[] =
{0x10, 0x18, 0x18, 0x08, 0x18, 0x18, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x13, 0x14, 0x44, 0x12, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
//Full screen refresh initialization
void EPD_HW_Init(void)
{int i;EPD_W21_RST_0;  // Module reset   delay_xms(20);//At least 10ms delay EPD_W21_RST_1;delay_xms(20); //At least 10ms delay Epaper_READBUSY();   EPD_W21_WriteCMD(0x12);  //SWRESETEpaper_READBUSY();   EPD_W21_WriteCMD(0x01); //Driver output control      
//	EPD_W21_WriteDATA((EPD_HEIGHT-1)%256);    
//	EPD_W21_WriteDATA((EPD_HEIGHT-1)/256);EPD_W21_WriteDATA((EPD_HEIGHT-1)& 0xFF);    EPD_W21_WriteDATA(((EPD_HEIGHT - 1) >> 8) & 0xFF);
//	EPD_W21_WriteDATA(0x00);//	EPD_W21_WriteCMD(0x11); //data entry mode       
//	EPD_W21_WriteDATA(0x01);//	EPD_W21_WriteCMD(0x44); //set Ram-X address start/end position   
//	EPD_W21_WriteDATA(0x00);
//	EPD_W21_WriteDATA(EPD_WIDTH/8-1);    //	EPD_W21_WriteCMD(0x45); //set Ram-Y address start/end position          
//	EPD_W21_WriteDATA((EPD_HEIGHT-1)%256);    
//	EPD_W21_WriteDATA((EPD_HEIGHT-1)/256);
//	EPD_W21_WriteDATA(0x00);
//	EPD_W21_WriteDATA(0x00); //	EPD_W21_WriteCMD(0x3C); //BorderWavefrom
//	EPD_W21_WriteDATA(0x05);	
//	  	
//  EPD_W21_WriteCMD(0x18); //Read built-in temperature sensor
//	EPD_W21_WriteDATA(0x80);	//	EPD_W21_WriteCMD(0x4E);   // set RAM x address count to 0;
//	EPD_W21_WriteDATA(0x00);
//	EPD_W21_WriteCMD(0x4F);   // set RAM y address count to 0X199;    
//	EPD_W21_WriteDATA((EPD_HEIGHT-1)%256);    
//	EPD_W21_WriteDATA((EPD_HEIGHT-1)/256);
//  Epaper_READBUSY();EPD_W21_WriteCMD(0x0c);EPD_W21_WriteDATA(0xD7);EPD_W21_WriteDATA(0xD6);EPD_W21_WriteDATA(0x9D);EPD_W21_WriteCMD(0x2c);EPD_W21_WriteDATA(0xA8);                     // VCOM 7C  0xA8EPD_W21_WriteCMD(0x3a);EPD_W21_WriteDATA(0x1A);                     // 4 dummy lines per gateEPD_W21_WriteCMD(0x3b);EPD_W21_WriteDATA(0x08);                     // 2us per lineEPD_W21_WriteCMD(0x11);EPD_W21_WriteDATA(0x03);                     // X increment; Y increment EPD_W21_WriteCMD(0x32);/* the length of look-up table is 30 bytes */for ( i = 0; i < 30; i++) {EPD_W21_WriteDATA(lut_full_update[i]);}
}

• 🌿刷新显示函数：EPD_Update（）

//Full screen refresh update function
void EPD_Update(void)
{   EPD_W21_WriteCMD(0x22); //Display Update Control//  EPD_W21_WriteDATA(0xF7);//注释掉该指令
EPD_W21_WriteDATA(0xc4);	//新增EPD_W21_WriteCMD(0x20); //Activate Display Update Sequence
//	EPD_W21_WriteDATA(0xFF);//  新增 TERMINATE_FRAME_READ_WRITE 不启用，没有发现其他异常Epaper_READBUSY();   }

• 合宙1.54“ 电子墨水屏（e-paper）屏幕不兼容GooDisplay的快速刷屏指令，

📄引脚定义

• 在Display_EPD_W21_spi.h中：

#define EPD_W21_MOSI_0	GPIO_ResetBits(GPIOD, GPIO_Pin_10)
#define EPD_W21_MOSI_1	GPIO_SetBits(GPIOD, GPIO_Pin_10)#define EPD_W21_CLK_0	GPIO_ResetBits(GPIOD, GPIO_Pin_9)
#define EPD_W21_CLK_1	GPIO_SetBits(GPIOD, GPIO_Pin_9)#define EPD_W21_CS_0	GPIO_ResetBits(GPIOD, GPIO_Pin_8)
#define EPD_W21_CS_1	GPIO_SetBits(GPIOD, GPIO_Pin_8)#define EPD_W21_DC_0	GPIO_ResetBits(GPIOE, GPIO_Pin_15)
#define EPD_W21_DC_1	GPIO_SetBits(GPIOE, GPIO_Pin_15)#define EPD_W21_RST_0	GPIO_ResetBits(GPIOE, GPIO_Pin_14)
#define EPD_W21_RST_1	GPIO_SetBits(GPIOE, GPIO_Pin_14)#define isEPD_W21_BUSY GPIO_ReadInputDataBit(GPIOE, GPIO_Pin_13) // for solomen solutions

📚合宙1.54墨水屏适配程序

• 🔖后续如果修复bug，将更新。

链接：https://pan.baidu.com/s/1_elRESwoOvCxe2ataPG4ug?pwd=em1y 
提取码：em1y

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-🔖此文章仅作为个人学习探索知识的总结，不作为他人或引用者的理论依据，由于学识所限，难免会出现错误或纰漏，欢迎大家指正。