Google Chat: zj734465502@gmail.com
+86-0755-88291180
sales01@spotpear.com
dragon_manager@163.com
services01@spotpear.com
manager01@spotpear.com
WhatsApp:13246739196
6inch e-Paper is big size screen, the glass panel and FPC is fragile, please be careful when use it for developing. we recommend you to reinforce the FPC with scotch tape when developing.
There are two version, one is raw panel and another is HAT version. Driver board (IT8951) is required for raw panel, if you are the first time to buy this e-paper, recommend you to choose HAT version which come with the driver board.
1448×1072 high definition, 6inch E-Ink raw display, black/white, 16 grayscale. The PCB (HAT version) is designed for Raspberry Pi
IT8951 Driver HAT | Raspberry Pi (BCM) | Description' |
5V | 5V | 5V power input |
GND | GND | Ground |
MISO | P9 | MISO Pin of SPI |
MOSI | P10 | MOSI Pin of SPI |
SCK | P11 | SCK Pin of SPI |
CS | P8 | Chip selection of SPI (Low active) |
RST | P17 | Reset pin (Low active) |
HRDY | P24 | Busy stats pin (Low when busy) |
wget http://www.airspayce.com/mikem/bcm2835/bcm2835-1.62.tar.gz tar zxvf bcm2835-1.62.tar.gz cd bcm2835-1.62 ./configure make sudo make check sudo make install
sudo raspi-config
Choose Interfacing Options ->SPI->Yes
git clone https://github.com/waveshare/IT8951-ePaper.git cd IT8951-ePaper make
sudo ./epd -2.51
IT8951 Driver HAT | STM32 | Description' |
5V | 5V | 5V power input |
GND | GND | Ground |
MISO | PE13 | MISO Pin of SPI |
MOSI | PE14 | MOSI Pin of SPI |
SCK | PE12 | SCK Pin of SPI |
CS | PE11 | Chip selection of SPI (Low active) |
RST | PC5 | Reset pin (Low active) |
HRDY | PA7 | Busy stats pin (Low when busy) |
IT8951 Driver HAT | STM32 | Description' |
DBUS0~DBUS15 | PB0~PB15 | Data pins |
HWE | PC1 | Write enable (Low active) |
D/C | PC7 | Data/Command(Low for command) |
CSEL | PC6 | Chip select enable (Low active) |
HRD | PC3 | Read enable (Low active) |
RST | PC0 | Reset pin (Low active) |
PA7 | Busy stats pin (Low when busy) | |
GND | GND | Ground |
VCC | 5V | 5V power input |
|}
For easily porting and using, we didn't use file system in the STM32 code. The image showed is saved as arrays. Here show you how to make the image arrays.
/********************************************************************* * SEGGER Microcontroller GmbH & Co. KG * * Solutions for real time microcontroller applications * * www.segger.com * ********************************************************************** * * * C-file generated by * * * * Bitmap Converter for emWin V5.22. * * Compiled Jul 4 2013, 12:18:24 * * (c) 1998 - 2013 Segger Microcontroller GmbH && Co. KG * * * ********************************************************************** * * * Source file: zoo_800_600 * * Dimensions: 800 * 600 * * NumColors: 256 * * * ********************************************************************** */ #include <stdlib.h> #include "GUI.h" #ifndef GUI_CONST_STORAGE #define GUI_CONST_STORAGE const #endif extern GUI_CONST_STORAGE GUI_BITMAP bmzoo_800_600; /********************************************************************* * * Palette * * Description * The following are the entries of the palette table. * The entries are stored as a 32-bit values of which 24 bits are * actually used according to the following bit mask: 0xBBGGRR * * The lower 8 bits represent the Red component. * The middle 8 bits represent the Green component. * The highest 8 bits represent the Blue component. */ static GUI_CONST_STORAGE GUI_COLOR _Colorszoo_800_600[] = { 0x000000, 0x010101, 0x020202, 0x030303, 0x040404, 0x050505, 0x060606, 0x070707, 0x080808, 0x090909, 0x0A0A0A, 0x0B0B0B, 0x0C0C0C, 0x0D0D0D, 0x0E0E0E, 0x0F0F0F, 0x101010, 0x111111, 0x121212, 0x131313, 0x141414, 0x151515, 0x161616, 0x171717, 0x181818, 0x191919, 0x1A1A1A, 0x1B1B1B, 0x1C1C1C, 0x1D1D1D, 0x1E1E1E, 0x1F1F1F, 0x202020, 0x212121, 0x222222, 0x232323, 0x242424, 0x252525, 0x262626, 0x272727, 0x282828, 0x292929, 0x2A2A2A, 0x2B2B2B, 0x2C2C2C, 0x2D2D2D, 0x2E2E2E, 0x2F2F2F, 0x303030, 0x313131, 0x323232, 0x333333, 0x343434, 0x353535, 0x363636, 0x373737, 0x383838, 0x393939, 0x3A3A3A, 0x3B3B3B, 0x3C3C3C, 0x3D3D3D, 0x3E3E3E, 0x3F3F3F, 0x404040, 0x414141, 0x424242, 0x434343, 0x444444, 0x454545, 0x464646, 0x474747, 0x484848, 0x494949, 0x4A4A4A, 0x4B4B4B, 0x4C4C4C, 0x4D4D4D, 0x4E4E4E, 0x4F4F4F, 0x505050, 0x515151, 0x525252, 0x535353, 0x545454, 0x555555, 0x565656, 0x575757, 0x585858, 0x595959, 0x5A5A5A, 0x5B5B5B, 0x5C5C5C, 0x5D5D5D, 0x5E5E5E, 0x5F5F5F, 0x606060, 0x616161, 0x626262, 0x636363, 0x646464, 0x656565, 0x666666, 0x676767, 0x686868, 0x696969, 0x6A6A6A, 0x6B6B6B, 0x6C6C6C, 0x6D6D6D, 0x6E6E6E, 0x6F6F6F, 0x707070, 0x717171, 0x727272, 0x737373, 0x747474, 0x757575, 0x767676, 0x777777, 0x787878, 0x797979, 0x7A7A7A, 0x7B7B7B, 0x7C7C7C, 0x7D7D7D, 0x7E7E7E, 0x7F7F7F, 0x808080, 0x818181, 0x828282, 0x838383, 0x848484, 0x858585, 0x868686, 0x878787, 0x888888, 0x898989, 0x8A8A8A, 0x8B8B8B, 0x8C8C8C, 0x8D8D8D, 0x8E8E8E, 0x8F8F8F, 0x909090, 0x919191, 0x929292, 0x939393, 0x949494, 0x959595, 0x969696, 0x979797, 0x989898, 0x999999, 0x9A9A9A, 0x9B9B9B, 0x9C9C9C, 0x9D9D9D, 0x9E9E9E, 0x9F9F9F, 0xA0A0A0, 0xA1A1A1, 0xA2A2A2, 0xA3A3A3, 0xA4A4A4, 0xA5A5A5, 0xA6A6A6, 0xA7A7A7, 0xA8A8A8, 0xA9A9A9, 0xAAAAAA, 0xABABAB, 0xACACAC, 0xADADAD, 0xAEAEAE, 0xAFAFAF, 0xB0B0B0, 0xB1B1B1, 0xB2B2B2, 0xB3B3B3, 0xB4B4B4, 0xB5B5B5, 0xB6B6B6, 0xB7B7B7, 0xB8B8B8, 0xB9B9B9, 0xBABABA, 0xBBBBBB, 0xBCBCBC, 0xBDBDBD, 0xBEBEBE, 0xBFBFBF, 0xC0C0C0, 0xC1C1C1, 0xC2C2C2, 0xC3C3C3, 0xC4C4C4, 0xC5C5C5, 0xC6C6C6, 0xC7C7C7, 0xC8C8C8, 0xC9C9C9, 0xCACACA, 0xCBCBCB, 0xCCCCCC, 0xCDCDCD, 0xCECECE, 0xCFCFCF, 0xD0D0D0, 0xD1D1D1, 0xD2D2D2, 0xD3D3D3, 0xD4D4D4, 0xD5D5D5, 0xD6D6D6, 0xD7D7D7, 0xD8D8D8, 0xD9D9D9, 0xDADADA, 0xDBDBDB, 0xDCDCDC, 0xDDDDDD, 0xDEDEDE, 0xDFDFDF, 0xE0E0E0, 0xE1E1E1, 0xE2E2E2, 0xE3E3E3, 0xE4E4E4, 0xE5E5E5, 0xE6E6E6, 0xE7E7E7, 0xE8E8E8, 0xE9E9E9, 0xEAEAEA, 0xEBEBEB, 0xECECEC, 0xEDEDED, 0xEEEEEE, 0xEFEFEF, 0xF0F0F0, 0xF1F1F1, 0xF2F2F2, 0xF3F3F3, 0xF4F4F4, 0xF5F5F5, 0xF6F6F6, 0xF7F7F7, 0xF8F8F8, 0xF9F9F9, 0xFAFAFA, 0xFBFBFB, 0xFCFCFC, 0xFDFDFD, 0xFEFEFE, 0xFFFFFF }; static GUI_CONST_STORAGE GUI_LOGPALETTE _Palzoo_800_600 = { 256, // Number of entries 0, // No transparency &_Colorszoo_800_600[0] }; GUI_CONST_STORAGE GUI_BITMAP bmzoo_800_600 = { 800, // xSize 600, // ySize 800, // BytesPerLine 8, // BitsPerPixel _aczoo_800_600, // Pointer to picture data (indices) &_Palzoo_800_600 // Pointer to palette };
static GUI_CONST_STORAGE unsigned char _aczoo_800_600[] = {
const unsigned char zoo_800_600[] = {
extern const unsigned char zoo_800_600[]; void IT8951DisplayExample3() { IT8951LdImgInfo stLdImgInfo; IT8951AreaImgInfo stAreaImgInfo; TWord width = gstI80DevInfo.usPanelW; TWord high = gstI80DevInfo.usPanelH; TDWord i; for (i = 0;i < width*high;i++) { gpFrameBuf[i] = zoo_800_600[i]; } IT8951WaitForDisplayReady(); //Setting Load image information stLdImgInfo.ulStartFBAddr = (TDWord)gpFrameBuf; stLdImgInfo.usEndianType = IT8951_LDIMG_L_ENDIAN; stLdImgInfo.usPixelFormat = IT8951_8BPP; stLdImgInfo.usRotate = IT8951_ROTATE_0; stLdImgInfo.ulImgBufBaseAddr = gulImgBufAddr; //Set Load Area stAreaImgInfo.usX = 0; stAreaImgInfo.usY = 0; stAreaImgInfo.usWidth = width; stAreaImgInfo.usHeight = high; IT8951HostAreaPackedPixelWrite(&stLdImgInfo, &stAreaImgInfo);//Display function 2 IT8951DisplayArea(0,0, gstI80DevInfo.usPanelW, gstI80DevInfo.usPanelH, 2); }
Because of updating, the hardware connection of e-Paper may difference as the picture showed, please connect the e-Paper according to the screen silk printing.
Mode | Features | 6inch/6inch HD!7.8inch/9.7inch/10.3inch | |
---|---|---|---|
INIT | Used to clear screen. please use it to clear screen after A2 mode | Mode0 | Mode0 |
GC16 | It is used it update screen for 16 grayscale display | Mode2 | Mode2 |
A2 | Can only supports Black and White color | Mode4 | Mode6 |
//basic mode definition UBYTE INIT_Mode = 0; UBYTE GC16_Mode = 2; //A2_Mode's value is not fixed, is decide by firmware's LUT UBYTE A2_Mode = 6; if( strcmp(LUT_Version, "M641") == 0 ){ //6inch e-Paper HAT(800,600), 6inch HD e-Paper HAT(1448,1072), 6inch HD touch e-Paper HAT(1448,1072) A2_Mode = 4; Four_Byte_Align = true; }else if( strcmp(LUT_Version, "M841") == 0 ){ //9.7inch e-Paper HAT(1200,825) A2_Mode = 6; }else if( strcmp(LUT_Version, "M841_TFA2812") == 0 ){ //7.8inch e-Paper HAT(1872,1404) A2_Mode = 6; }else if( strcmp(LUT_Version, "M841_TFA5210") == 0 ){ //10.3inch e-Paper HAT(1872,1404) A2_Mode = 6; }else{ //default set to 6 as A2 Mode A2_Mode = 6; }
bpp is Bits per pixel, it is the data that show the number of bits per pixel. Currently, all the gray e-Paper supports 1bpp, 2bpp, 4bpp and 8bpp.
Every pixel of the original image contains 8bits (1 byte). To convert it to BMP, you can only get the hight bits. For example, if you want to get pixels for 2bpp, you can just get the hight 2 bits from 8bpp(8bits) image.
UDOUBLE Addr = X * (Paint.BitsPerPixel) / 8 + Y * Paint.WidthByte; switch( Paint.BitsPerPixel ){ case 8:{ Paint.Image[Addr] = Color & 0xF0; break; } case 4:{ Paint.Image[Addr] &= ~( (0xF0) >> (7 - (X*4+3)%8 ) ); Paint.Image[Addr] |= (Color & 0xF0) >> (7 - (X*4+3)%8 ); break; } case 2:{ Paint.Image[Addr] &= ~( (0xC0) >> (7 - (X*2+1)%8 ) ); Paint.Image[Addr] |= (Color & 0xC0) >> (7 - (X*2+1)%8 ); break; } case 1:{ Paint.Image[Addr] &= ~( (0x80) >> (7 - X%8) ); Paint.Image[Addr] |= (Color & 0x80) >> (7 - X%8); break; } }
During test, we find that when we use 1bpp mode to update the 6inch e-Paper, 6inch HD e-Paper, we should align the X (begin point) and W (width) of udpate area to four bytes (32bits), otherwse, the image cannot be displayed.
if( strcmp(LUT_Version, "M641") == 0 ){ //6inch e-Paper HAT(800,600), 6inch HD e-Paper HAT(1448,1072), 6inch HD touch e-Paper HAT(1448,1072) A2_Mode = 4; Four_Byte_Align = true; }else if( strcmp(LUT_Version, "M841") == 0 ){ ... } if(Four_Byte_Align == true){ In_4bp_Refresh_Area_Width = Panel_Width - (Panel_Width % 32); }else{ In_4bp_Refresh_Area_Width = Panel_Width; } X_Start = Min_X < 32 ? 0 : Min_X - (Min_X % 32); Debug("X_Start:%d\r\n",X_Start); X_End = ( Max_X + (32 - (Max_X % 32)) ) > Touch_Pannel_Area_Width ? ( Max_X - (Max_X % 32) ) : ( Max_X + (32 - (Max_X % 32)) ); Debug("X_End:%d\r\n",X_End); Y_Start = Min_Y; Debug("Y_Start:%d\r\n",Y_Start); Y_End = Max_Y; Debug("Y_Start:%d\r\n",Y_End); Width = X_End - X_Start; if(Width<=0){ Width = 32; } Debug("Width:%d\r\n",Width); Height = Y_End-Y_Start; if(Height<=0){ Height = 32; } Debug("Height:%d\r\n",Height);
The CPU of Raspberry Pi 3 is different with Raspberry Pi 4
bcm2835_spi_begin();//Start spi interface, set spi pin for the reuse function bcm2835_spi_setBitOrder(BCM2835_SPI_BIT_ORDER_MSBFIRST);//High first transmission bcm2835_spi_setDataMode(BCM2835_SPI_MODE0);//spi mode 0 //bcm2835_spi_setClockDivider(BCM2835_SPI_CLOCK_DIVIDER_16);//For RPi 3/3B/3B+ bcm2835_spi_setClockDivider(BCM2835_SPI_CLOCK_DIVIDER_32);//For RPi 4B /* SPI clock reference link:*/ /*http://www.airspayce.com/mikem/bcm2835/group__constants.html#gaf2e0ca069b8caef24602a02e8a00884e*/
Sometimes, the e-Paper display abnormally because of long FPC cable, in this case, you can try to enhance the driving capability
#if(Enhance) Debug("Attention! Enhanced driving ability, only used when the screen is blurred\r\n"); Enhance_Driving_Capability(); #endif /****************************************************************************** function : Enhanced driving capability parameter: Enhanced driving capability for IT8951, in case the blurred display effect ******************************************************************************/ void Enhance_Driving_Capability(void) { UWORD RegValue = EPD_IT8951_ReadReg(0x0038); Debug("The reg value before writing is %x\r\n", RegValue); EPD_IT8951_WriteReg(0x0038, 0x0602); RegValue = EPD_IT8951_ReadReg(0x0038); Debug("The reg value after writing is %x\r\n", RegValue); }
The VCOM voltages of every e-Paper panel are different and they are printed on FPC cable. Please make sure that you use the correct VCOM.