STM32L010驱动2.7寸电子水墨屏心得亲测可用

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STM32L010驱动2.7寸电子水墨屏心得亲测可用

2024-03-02 10:20| 来源: 网络整理| 查看: 265

#STM32L010驱动2.7寸电子水墨屏心得

经过几天的折腾调试2.7寸电子水墨屏的驱动，驱动芯片使用GDEW027W3芯片，厂家给了调试驱动，但是一开始使用原厂给的Demon移植过来无法实现局部刷新，经过几天的排查发现硬件的升压电路存在问题总是升压不够导致刷新不了，要么就是刷新不完全不稳定。2.7寸电子水墨屏的特点是低功耗，但是刷新速度比较慢，我的调试代码亲测可用。 void pic_display_white(void) { unsigned int i;

EPD_W21_WriteCMD(0x13); for(i=0;i unsigned char busy; do { EPD_W21_WriteCMD(0x71); busy =isEPD_W21_BUSY; busy =!(busy & 0x01); } while(busy); driver_delay_xms(200); }

void lut(void) { unsigned int count; { EPD_W21_WriteCMD(0x20); //vcom for(count=0;count

partial_display5(x,y,w,l ,Num_64_64Image[numberold],Num_64_64Image[numNew], mode);

}

void partial_display5(u16 x,u16 y,u16 w,u16 l ,const unsigned char *old_data,const unsigned char *new_data,unsigned char mode) //partial display { unsigned int i,count;

count=w*l/8; EPD_W21_WriteCMD(0x82); //vcom_DC setting EPD_W21_WriteDATA (0x08); EPD_W21_WriteCMD(0X50); EPD_W21_WriteDATA(0x47); lut1(); EPD_W21_WriteCMD(0x91); //This command makes the display enter partial mode EPD_W21_WriteCMD(0x90); //resolution setting EPD_W21_WriteCMD(0x14); //write old data EPD_W21_WriteDATA(0); //x-start EPD_W21_WriteDATA(x); //x-end EPD_W21_WriteDATA(0); //y-start EPD_W21_WriteDATA(y); //y-end EPD_W21_WriteDATA(0); //w-start EPD_W21_WriteDATA(w); //w-end EPD_W21_WriteDATA(0); //l-start EPD_W21_WriteDATA(l); //l-end if(mode==0) for(i=0;i EPD_W21_WriteDATA(0); } }

EPD_W21_WriteCMD(0x16); //write display position EPD_W21_WriteDATA(0); //x-start EPD_W21_WriteDATA(x); //x-end EPD_W21_WriteDATA(0); //y-start EPD_W21_WriteDATA(y); //y-end EPD_W21_WriteDATA(0); //w-start EPD_W21_WriteDATA(w); //w-end EPD_W21_WriteDATA(0); //l-start EPD_W21_WriteDATA(l); //l-end lcd_chkstatus(); }

void EPD_display_init(void) {

unsigned char HRES_byte1,HRES_byte2,VRES_byte1,VRES_byte2; HRES_byte1=0x00; //176 HRES_byte2=0xb0; VRES_byte1=0x01; //264 VRES_byte2=0x08; EPD_W21_Init(); //reset EPD_W21_WriteCMD(0x01); //POWER SETTING EPD_W21_WriteDATA (0x03); EPD_W21_WriteDATA (0x00); EPD_W21_WriteDATA (0x2b); EPD_W21_WriteDATA (0x2b); EPD_W21_WriteCMD(0x06); //boostÉè¶¨ EPD_W21_WriteDATA (0x07); //A EPD_W21_WriteDATA (0x07); //B EPD_W21_WriteDATA (0x17); //C // EPD_W21_WriteDATA (0x27); //C EPD_W21_WriteCMD(0x16); EPD_W21_WriteDATA(0x00); EPD_W21_WriteCMD(0x04); lcd_chkstatus(); EPD_W21_WriteCMD(0x00); //panel setting EPD_W21_WriteDATA(0xbf); //KW-BF KWR-AF BWROTP 0f EPD_W21_WriteCMD(0x30); //PLL setting EPD_W21_WriteDATA (0x3a); //90 50HZ 3A 100HZ 29 150Hz 39 200HZ 31 171HZ EPD_W21_WriteCMD(0x61); //resolution setting EPD_W21_WriteDATA (HRES_byte1); EPD_W21_WriteDATA (HRES_byte2); //176 EPD_W21_WriteDATA (VRES_byte1); EPD_W21_WriteDATA (VRES_byte2); //264 EPD_W21_WriteCMD(0x82); //vcom_DC setting // EPD_W21_WriteDATA (0x08); //0x28:-2.0V,0x12:-0.9V EPD_W21_WriteDATA (0x12); //0x28:-2.0V,0x12:-0.9V driver_delay_xms(2); EPD_W21_WriteCMD(0X50); //VCOM AND DATA INTERVAL SETTING EPD_W21_WriteDATA(0x97); //WBmode:VBDF 17|D7 VBDW 97 VBDB 57 WBRmode:VBDF F7 VBDW 77 VBDB 37 VBDR B7

} void partial_display(u16 x,u16 y,u16 w,u16 l ,void partial_old(void),void partial_new(void)) //partial display { EPD_W21_WriteCMD(0x82); //vcom_DC setting EPD_W21_WriteDATA (0x08); EPD_W21_WriteCMD(0X50); EPD_W21_WriteDATA(0x47); lut1(); EPD_W21_WriteCMD(0x91); //This command makes the display enter partial mode EPD_W21_WriteCMD(0x90); //resolution setting

EPD_W21_WriteCMD(0x14); //write old data EPD_W21_WriteDATA(0); //x-start EPD_W21_WriteDATA(x); //x-end EPD_W21_WriteDATA(0); //y-start EPD_W21_WriteDATA(y); //y-end EPD_W21_WriteDATA(0); //w-start EPD_W21_WriteDATA(w); //w-end EPD_W21_WriteDATA(0); //l-start EPD_W21_WriteDATA(l); //l-end partial_old(); EPD_W21_WriteCMD(0x15); //write new data EPD_W21_WriteDATA(0); //x-start EPD_W21_WriteDATA(x); //x-end EPD_W21_WriteDATA(0); //y-start EPD_W21_WriteDATA(y); //y-end EPD_W21_WriteDATA(0); //w-start EPD_W21_WriteDATA(w); //w-end EPD_W21_WriteDATA(0); //l-start EPD_W21_WriteDATA(l); //l-end partial_new(); EPD_W21_WriteCMD(0x16); //write display position EPD_W21_WriteDATA(0); //x-start EPD_W21_WriteDATA(x); //x-end EPD_W21_WriteDATA(0); //y-start EPD_W21_WriteDATA(y); //y-end EPD_W21_WriteDATA(0); //w-start EPD_W21_WriteDATA(w); //w-end EPD_W21_WriteDATA(0); //l-start EPD_W21_WriteDATA(l); //l-end lcd_chkstatus();

}

void EPD_init(void) { EPD_W21_Init();

EPD_W21_WriteCMD(0x06); //boost soft start EPD_W21_WriteDATA (0x07); //A EPD_W21_WriteDATA (0x07); //B EPD_W21_WriteDATA (0x17); //C EPD_W21_WriteCMD(0x04); lcd_chkstatus(); EPD_W21_WriteCMD(0x00); //panel setting EPD_W21_WriteDATA(0x17); //LUT from OTP,320x300 EPD_W21_WriteCMD(0x16); EPD_W21_WriteDATA(0x00); EPD_W21_WriteCMD(0xF8); //boost?? EPD_W21_WriteDATA (0x60); EPD_W21_WriteDATA(0xa5); EPD_W21_WriteCMD(0xF8); //boost?? EPD_W21_WriteDATA (0x73); EPD_W21_WriteDATA (0x23); EPD_W21_WriteCMD(0xF8); //boost?? EPD_W21_WriteDATA (0x7C); EPD_W21_WriteDATA(0x00); EPD_W21_WriteCMD(0X50); EPD_W21_WriteDATA(0x97); //WBmode:VBDF 17|D7 VBDW 97 VBDB 57 WBRmode:VBDF F7 VBDW 77 VBDB 37 VBDR B7

}

void EPD_display_Clean(void) { unsigned int i;

EPD_W21_WriteCMD(0x13); for(i=0;i unsigned int i; for(i=0;i unsigned int i; for(i=0;i EPD_W21_WriteCMD(0X50); EPD_W21_WriteDATA(0xf7); EPD_W21_WriteCMD(0X02); //power off lcd_chkstatus(); EPD_W21_WriteCMD(0X07); //deep sleep EPD_W21_WriteDATA(0xA5); }

主函数测试代码：

void main() { EPD_display_init();//EPD init full_display(pic_display_white); //pic_white /**********************È«ÆÁÏÔÊ¾********************************/ EPD_display_init();//EPD init partial_display(0,0,176,264,partial_full00, partial_full03); //partial full display driver_delay_xms(1000); } 下图为硬件电路图：注意硬件电路的外围参数必须按照提供的电路图的参数配置，否则升压电路工作异常， ![红色标注的](https://img-blog.csdnimg.cn/20200404235206419.jpg?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI1MTQ1NjQ3,size_16,color_FFFFFF,t_70#pic_center) 红色标注的地方一定按照此参数配置，MOS管的型号必须按照此Mos管否则不保证会正常工作。

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STM32L010驱动2.7寸电子水墨屏心得亲测可用

STM32L010驱动2.7寸电子水墨屏心得亲测可用

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