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Add color calibration functionality and cleanup a bit

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This commit is contained in:
zuckerberg 2023-09-03 22:36:34 -06:00
parent ec941eceb8
commit eff01cd141
4 changed files with 85 additions and 548 deletions
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576
firmware/lib/it8951/it8951.h
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@ -11,10 +11,10 @@
#define IT8951_TCON_SLEEP 0x0003
#define IT8951_TCON_REG_RD 0x0010
#define IT8951_TCON_REG_WR 0x0011
#define IT8951_TCON_MEM_BST_RD_T 0x0012
#define IT8951_TCON_MEM_BST_RD_S 0x0013
#define IT8951_TCON_MEM_BST_WR 0x0014
#define IT8951_TCON_MEM_BST_END 0x0015
// #define IT8951_TCON_MEM_BST_RD_T 0x0012
// #define IT8951_TCON_MEM_BST_RD_S 0x0013
// #define IT8951_TCON_MEM_BST_WR 0x0014
// #define IT8951_TCON_MEM_BST_END 0x0015
#define IT8951_TCON_LD_IMG 0x0020
#define IT8951_TCON_LD_IMG_AREA 0x0021
#define IT8951_TCON_LD_IMG_END 0x0022
@ -22,37 +22,34 @@
//I80 User defined command code
#define USDEF_I80_CMD_DPY_AREA 0x0034
#define USDEF_I80_CMD_GET_DEV_INFO 0x0302
#define USDEF_I80_CMD_DPY_BUF_AREA 0x0037
//Panel
#define IT8951_PANEL_WIDTH 1024 //it Get Device information
#define IT8951_PANEL_HEIGHT 758
// #define USDEF_I80_CMD_DPY_BUF_AREA 0x0037
//Rotate mode
#define IT8951_ROTATE_0 0
#define IT8951_ROTATE_90 1
#define IT8951_ROTATE_180 2
#define IT8951_ROTATE_270 3
// #define IT8951_ROTATE_90 1
// #define IT8951_ROTATE_180 2
// #define IT8951_ROTATE_270 3
//Pixel mode , BPP - Bit per Pixel
#define IT8951_2BPP 0
#define IT8951_3BPP 1
// #define IT8951_2BPP 0
// #define IT8951_3BPP 1
#define IT8951_4BPP 2
#define IT8951_8BPP 3
// #define IT8951_8BPP 3
//Waveform Mode
#define IT8951_MODE_0 0
#define IT8951_MODE_1 1
#define IT8951_MODE_2 2
#define IT8951_MODE_3 3
#define IT8951_MODE_4 4
// #define IT8951_MODE_0 0
// #define IT8951_MODE_1 1
// #define IT8951_MODE_2 2
// #define IT8951_MODE_3 3
// #define IT8951_MODE_4 4
//Endian Type
#define IT8951_LDIMG_L_ENDIAN 0
#define IT8951_LDIMG_B_ENDIAN 1
// #define IT8951_LDIMG_B_ENDIAN 1
//Auto LUT
#define IT8951_DIS_AUTO_LUT 0
#define IT8951_EN_AUTO_LUT 1
// #define IT8951_DIS_AUTO_LUT 0
// #define IT8951_EN_AUTO_LUT 1
//LUT Engine Status
#define IT8951_ALL_LUTE_BUSY 0xFFFF
// #define IT8951_ALL_LUTE_BUSY 0xFFFF
//-----------------------------------------------------------------------
// IT8951 TCon Registers defines
@ -60,21 +57,21 @@
//Register Base Address
#define DISPLAY_REG_BASE 0x1000 //Register RW access for I80 only
//Base Address of Basic LUT Registers
#define LUT0EWHR (DISPLAY_REG_BASE + 0x00) //LUT0 Engine Width Height Reg
#define LUT0XYR (DISPLAY_REG_BASE + 0x40) //LUT0 XY Reg
#define LUT0BADDR (DISPLAY_REG_BASE + 0x80) //LUT0 Base Address Reg
#define LUT0MFN (DISPLAY_REG_BASE + 0xC0) //LUT0 Mode and Frame number Reg
#define LUT01AF (DISPLAY_REG_BASE + 0x114) //LUT0 and LUT1 Active Flag Reg
// #define LUT0EWHR (DISPLAY_REG_BASE + 0x00) //LUT0 Engine Width Height Reg
// #define LUT0XYR (DISPLAY_REG_BASE + 0x40) //LUT0 XY Reg
// #define LUT0BADDR (DISPLAY_REG_BASE + 0x80) //LUT0 Base Address Reg
// #define LUT0MFN (DISPLAY_REG_BASE + 0xC0) //LUT0 Mode and Frame number Reg
// #define LUT01AF (DISPLAY_REG_BASE + 0x114) //LUT0 and LUT1 Active Flag Reg
//Update Parameter Setting Register
#define UP0SR (DISPLAY_REG_BASE + 0x134) //Update Parameter0 Setting Reg
// #define UP0SR (DISPLAY_REG_BASE + 0x134) //Update Parameter0 Setting Reg
#define UP1SR (DISPLAY_REG_BASE + 0x138) //Update Parameter1 Setting Reg
#define LUT0ABFRV (DISPLAY_REG_BASE + 0x13C) //LUT0 Alpha blend and Fill rectangle Value
#define UPBBADDR (DISPLAY_REG_BASE + 0x17C) //Update Buffer Base Address
#define LUT0IMXY (DISPLAY_REG_BASE + 0x180) //LUT0 Image buffer X/Y offset Reg
// #define UP1SR (DISPLAY_REG_BASE + 0x138) //Update Parameter1 Setting Reg
// #define LUT0ABFRV (DISPLAY_REG_BASE + 0x13C) //LUT0 Alpha blend and Fill rectangle Value
// #define UPBBADDR (DISPLAY_REG_BASE + 0x17C) //Update Buffer Base Address
// #define LUT0IMXY (DISPLAY_REG_BASE + 0x180) //LUT0 Image buffer X/Y offset Reg
#define LUTAFSR (DISPLAY_REG_BASE + 0x224) //LUT Status Reg (status of All LUT Engines)
#define BGVR (DISPLAY_REG_BASE + 0x250) //Bitmap (1bpp) image color table
// #define BGVR (DISPLAY_REG_BASE + 0x250) //Bitmap (1bpp) image color table
//-------System Registers----------------
#define SYS_REG_BASE 0x0000
@ -117,37 +114,16 @@ IT8951DevInfo gstI80DevInfo;
uint8_t* gpFrameBuf;
uint32_t gulImgBufAddr;
#define SYS_REG_BASE 0x0000
#define I80CPCR (SYS_REG_BASE + 0x04)
#define USDEF_I80_CMD_GET_DEV_INFO 0x0302
#define IT8951_TCON_REG_WR 0x0011
void GetIT8951SystemInfo(void* pBuf);
void IT8951WriteReg(uint16_t usRegAddr,uint16_t usValue);
void EPD_Clear(uint8_t Color);
uint8_t IT8951_Init()
{
//bcm2835_spi_begin();
SPI.begin(SCK, MISO, MOSI, CS);
//SPI.begin();
//bcm2835_spi_setBitOrder(BCM2835_SPI_BIT_ORDER_MSBFIRST); //default
//SPI.setBitOrder(MSBFIRST);
//bcm2835_spi_setDataMode(BCM2835_SPI_MODE0); //default
//SPI.setDataMode(SPI_MODE0);
//bcm2835_spi_setClockDivider(BCM2835_SPI_CLOCK_DIVIDER_32); //default
//SPI.setClockDivider(SPI_CLOCK_DIV8);
// alternativ:
SPI.beginTransaction(SPISettings(20000000, MSBFIRST, SPI_MODE0));
//bcm2835_gpio_fsel(CS, BCM2835_GPIO_FSEL_OUTP);
pinMode(CS, OUTPUT);
//bcm2835_gpio_fsel(HRDY, BCM2835_GPIO_FSEL_INPT);
pinMode(HRDY, INPUT);
//bcm2835_gpio_fsel(RESET, BCM2835_GPIO_FSEL_OUTP);
pinMode(RESET, OUTPUT);
bcm2835_gpio_write(CS, HIGH);
@ -155,8 +131,7 @@ uint8_t IT8951_Init()
printf("****** IT8951 ******\n");
bcm2835_gpio_write(RESET, LOW);
//bcm2835_delay(100);
delay(1000); //NOTE 100ms like in specs is not enough
delay(1000); // NOTE 100ms like in specs is not enough
bcm2835_gpio_write(RESET, HIGH);
//Get Device Info
@ -175,17 +150,9 @@ uint8_t IT8951_Init()
//Set to Enable I80 Packed mode
IT8951WriteReg(I80CPCR, 0x0001);
//SPI.endTransaction();
return 0;
}
/*
extern IT8951DevInfo gstI80DevInfo;
extern uint8_t* gpFrameBuf; //Host Source Frame buffer
extern uint32_t gulImgBufAddr; //IT8951 Image buffer address
*/
//-----------------------------------------------------------
//Host controller function 1---Wait for host data Bus Ready
//-----------------------------------------------------------
@ -244,30 +211,6 @@ void LCDWriteData(uint16_t usData)
bcm2835_gpio_write(CS,HIGH);
}
void LCDWriteNData(uint16_t* pwBuf, uint32_t ulSizeWordCnt)
{
uint32_t i;
uint16_t wPreamble = 0x0000;
LCDWaitForReady();
bcm2835_gpio_write(CS,LOW);
bcm2835_spi_transfer(wPreamble>>8);
bcm2835_spi_transfer(wPreamble);
LCDWaitForReady();
for(i=0;i<ulSizeWordCnt;i++)
{
bcm2835_spi_transfer(pwBuf[i]>>8);
bcm2835_spi_transfer(pwBuf[i]);
}
bcm2835_gpio_write(CS,HIGH);
}
//-----------------------------------------------------------
//Host controller function 4---Read Data from host data Bus
//-----------------------------------------------------------
@ -384,6 +327,7 @@ uint16_t IT8951ReadReg(uint16_t usRegAddr)
usData = LCDReadData();
return usData;
}
//-----------------------------------------------------------
//Host Cmd 5---REG_WR
//-----------------------------------------------------------
@ -395,130 +339,6 @@ void IT8951WriteReg(uint16_t usRegAddr,uint16_t usValue)
LCDWriteData(usValue);
}
//-----------------------------------------------------------
//Host Cmd 6---MEM_BST_RD_T
//-----------------------------------------------------------
void IT8951MemBurstReadTrigger(uint32_t ulMemAddr , uint32_t ulReadSize)
{
uint16_t usArg[4];
//Setting Arguments for Memory Burst Read
usArg[0] = (uint16_t)(ulMemAddr & 0x0000FFFF); //addr[15:0]
usArg[1] = (uint16_t)( (ulMemAddr >> 16) & 0x0000FFFF ); //addr[25:16]
usArg[2] = (uint16_t)(ulReadSize & 0x0000FFFF); //Cnt[15:0]
usArg[3] = (uint16_t)( (ulReadSize >> 16) & 0x0000FFFF ); //Cnt[25:16]
//Send Cmd and Arg
LCDSendCmdArg(IT8951_TCON_MEM_BST_RD_T , usArg , 4);
}
//-----------------------------------------------------------
//Host Cmd 7---MEM_BST_RD_S
//-----------------------------------------------------------
void IT8951MemBurstReadStart()
{
LCDWriteCmdCode(IT8951_TCON_MEM_BST_RD_S);
}
//-----------------------------------------------------------
//Host Cmd 8---MEM_BST_WR
//-----------------------------------------------------------
void IT8951MemBurstWrite(uint32_t ulMemAddr , uint32_t ulWriteSize)
{
uint16_t usArg[4];
//Setting Arguments for Memory Burst Write
usArg[0] = (uint16_t)(ulMemAddr & 0x0000FFFF); //addr[15:0]
usArg[1] = (uint16_t)( (ulMemAddr >> 16) & 0x0000FFFF ); //addr[25:16]
usArg[2] = (uint16_t)(ulWriteSize & 0x0000FFFF); //Cnt[15:0]
usArg[3] = (uint16_t)( (ulWriteSize >> 16) & 0x0000FFFF ); //Cnt[25:16]
//Send Cmd and Arg
LCDSendCmdArg(IT8951_TCON_MEM_BST_WR , usArg , 4);
}
//-----------------------------------------------------------
//Host Cmd 9---MEM_BST_END
//-----------------------------------------------------------
void IT8951MemBurstEnd(void)
{
LCDWriteCmdCode(IT8951_TCON_MEM_BST_END);
}
//-----------------------------------------------------------
//Example of Memory Burst Write
//-----------------------------------------------------------
// ****************************************************************************************
// Function name: IT8951MemBurstWriteProc( )
//
// Description:
// IT8951 Burst Write procedure
//
// Arguments:
// uint32_t ulMemAddr: IT8951 Memory Target Address
// uint32_t ulWriteSize: Write Size (Unit: Word)
// uint8_t* pDestBuf - Buffer of Sent data
// Return Values:
// NULL.
// Note:
//
// ****************************************************************************************
void IT8951MemBurstWriteProc(uint32_t ulMemAddr , uint32_t ulWriteSize, uint16_t* pSrcBuf )
{
uint32_t i;
//Send Burst Write Start Cmd and Args
IT8951MemBurstWrite(ulMemAddr , ulWriteSize);
//Burst Write Data
for(i=0;i<ulWriteSize;i++)
{
LCDWriteData(pSrcBuf[i]);
}
//Send Burst End Cmd
IT8951MemBurstEnd();
}
// ****************************************************************************************
// Function name: IT8951MemBurstReadProc( )
//
// Description:
// IT8951 Burst Read procedure
//
// Arguments:
// uint32_t ulMemAddr: IT8951 Read Memory Address
// uint32_t ulReadSize: Read Size (Unit: Word)
// uint8_t* pDestBuf - Buffer for storing Read data
// Return Values:
// NULL.
// Note:
//
// ****************************************************************************************
void IT8951MemBurstReadProc(uint32_t ulMemAddr , uint32_t ulReadSize, uint16_t* pDestBuf )
{
//Send Burst Read Start Cmd and Args
IT8951MemBurstReadTrigger(ulMemAddr , ulReadSize);
//Burst Read Fire
IT8951MemBurstReadStart();
//Burst Read Request for SPI interface only
LCDReadNData(pDestBuf, ulReadSize);
//Send Burst End Cmd
IT8951MemBurstEnd(); //the same with IT8951MemBurstEnd()
}
//-----------------------------------------------------------
//Host Cmd 10---LD_IMG
//-----------------------------------------------------------
void IT8951LoadImgStart(IT8951LdImgInfo* pstLdImgInfo)
{
uint16_t usArg;
//Setting Argument for Load image start
usArg = (pstLdImgInfo->usEndianType << 8 )
|(pstLdImgInfo->usPixelFormat << 4)
|(pstLdImgInfo->usRotate);
//Send Cmd
LCDWriteCmdCode(IT8951_TCON_LD_IMG);
//Send Arg
LCDWriteData(usArg);
}
//-----------------------------------------------------------
//Host Cmd 11---LD_IMG_AREA
//-----------------------------------------------------------
@ -634,256 +454,11 @@ void IT8951DisplayArea(uint16_t usX, uint16_t usY, uint16_t usW, uint16_t usH, u
LCDWriteData(usDpyMode);
}
//Display Area with bitmap on EPD
//-----------------------------------------------------------
// Display Function 4---for Display Area for 1-bpp mode format
// the bitmap(1bpp) mode will be enable when Display
// and restore to Default setting (disable) after displaying finished
//-----------------------------------------------------------
void IT8951DisplayArea1bpp(uint16_t usX, uint16_t usY, uint16_t usW, uint16_t usH, uint16_t usDpyMode, uint8_t ucBGGrayVal, uint8_t ucFGGrayVal)
{
//Set Display mode to 1 bpp mode - Set 0x18001138 Bit[18](0x1800113A Bit[2])to 1
IT8951WriteReg(UP1SR+2, IT8951ReadReg(UP1SR+2) | (1<<2));
//Set BitMap color table 0 and 1 , => Set Register[0x18001250]:
//Bit[7:0]: ForeGround Color(G0~G15) for 1
//Bit[15:8]:Background Color(G0~G15) for 0
IT8951WriteReg(BGVR, (ucBGGrayVal<<8) | ucFGGrayVal);
//Display
IT8951DisplayArea( usX, usY, usW, usH, usDpyMode);
IT8951WaitForDisplayReady();
//Restore to normal mode
IT8951WriteReg(UP1SR+2, IT8951ReadReg(UP1SR+2) & ~(1<<2));
}
//-------------------------------------------------------------------------------------------------------------
// Command - 0x0037 for Display Base addr by User
// uint32_t ulDpyBufAddr - Host programmer need to indicate the Image buffer address of IT8951
// In current case, there is only one image buffer in IT8951 so far.
// So Please set the Image buffer address you got in initial stage.
// (gulImgBufAddr by Get device information 0x0302 command)
//
//-------------------------------------------------------------------------------------------------------------
void IT8951DisplayAreaBuf(uint16_t usX, uint16_t usY, uint16_t usW, uint16_t usH, uint16_t usDpyMode, uint32_t ulDpyBufAddr)
{
//Send I80 Display Command (User defined command of IT8951)
LCDWriteCmdCode(USDEF_I80_CMD_DPY_BUF_AREA); //0x0037
//Write arguments
LCDWriteData(usX);
LCDWriteData(usY);
LCDWriteData(usW);
LCDWriteData(usH);
LCDWriteData(usDpyMode);
LCDWriteData((uint16_t)ulDpyBufAddr); //Display Buffer Base address[15:0]
LCDWriteData((uint16_t)(ulDpyBufAddr>>16)); //Display Buffer Base address[26:16]
}
//-----------------------------------------------------------
//Test function 1---Software Initial
//-----------------------------------------------------------
/*uint8_t IT8951_Init()
{
if (!bcm2835_init())
{
printf("bcm2835_init error \n");
return 1;
}
bcm2835_spi_begin();
bcm2835_spi_setBitOrder(BCM2835_SPI_BIT_ORDER_MSBFIRST); //default
bcm2835_spi_setDataMode(BCM2835_SPI_MODE0); //default
bcm2835_spi_setClockDivider(BCM2835_SPI_CLOCK_DIVIDER_32); //default
bcm2835_gpio_fsel(CS, BCM2835_GPIO_FSEL_OUTP);
bcm2835_gpio_fsel(HRDY, BCM2835_GPIO_FSEL_INPT);
bcm2835_gpio_fsel(RESET, BCM2835_GPIO_FSEL_OUTP);
bcm2835_gpio_write(CS, HIGH);
printf("****** IT8951 ******\n");
bcm2835_gpio_write(RESET, LOW);
bcm2835_delay(100);
bcm2835_gpio_write(RESET, HIGH);
//Get Device Info
GetIT8951SystemInfo(&gstI80DevInfo);
gpFrameBuf = malloc(gstI80DevInfo.usPanelW * gstI80DevInfo.usPanelH);
if (!gpFrameBuf)
{
perror("malloc error!\n");
return 1;
}
gulImgBufAddr = gstI80DevInfo.usImgBufAddrL | (gstI80DevInfo.usImgBufAddrH << 16);
//Set to Enable I80 Packed mode
IT8951WriteReg(I80CPCR, 0x0001);
return 0;
}*/
void IT8951_Cancel()
{
free(gpFrameBuf);
//bcm2835_spi_end();
//bcm2835_close();
}
//-----------------------------------------------------------
//Test function 2---Example of Display Flow
//-----------------------------------------------------------
void IT8951DisplayExample()
{
IT8951LdImgInfo stLdImgInfo;
IT8951AreaImgInfo stAreaImgInfo;
//Prepare image
//Write pixel 0xF0(White) to Frame Buffer
memset(gpFrameBuf, 0xF0, gstI80DevInfo.usPanelW * gstI80DevInfo.usPanelH);
//Check TCon is free ? Wait TCon Ready (optional)
IT8951WaitForDisplayReady();
//--------------------------------------------------------------------------------------------
// initial display - Display white only
//--------------------------------------------------------------------------------------------
//Load Image and Display
//Setting Load image information
stLdImgInfo.ulStartFBAddr = (uint32_t)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 = gstI80DevInfo.usPanelW;
stAreaImgInfo.usHeight = gstI80DevInfo.usPanelH;
//Load Image from Host to IT8951 Image Buffer
IT8951HostAreaPackedPixelWrite(&stLdImgInfo, &stAreaImgInfo);//Display function 2
//Display Area ?V (x,y,w,h) with mode 0 for initial White to clear Panel
IT8951DisplayArea(0,0, gstI80DevInfo.usPanelW, gstI80DevInfo.usPanelH, 0);
//--------------------------------------------------------------------------------------------
// Regular display - Display Any Gray colors with Mode 2 or others
//--------------------------------------------------------------------------------------------
//Preparing buffer to All black (8 bpp image)
//or you can create your image pattern here..
memset(gpFrameBuf, 0x00, gstI80DevInfo.usPanelW * gstI80DevInfo.usPanelH);
IT8951WaitForDisplayReady();
//Setting Load image information
stLdImgInfo.ulStartFBAddr = (uint32_t)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 = gstI80DevInfo.usPanelW;
stAreaImgInfo.usHeight = gstI80DevInfo.usPanelH;
//Load Image from Host to IT8951 Image Buffer
IT8951HostAreaPackedPixelWrite(&stLdImgInfo, &stAreaImgInfo);//Display function 2
//Display Area ?V (x,y,w,h) with mode 2 for fast gray clear mode - depends on current waveform
IT8951DisplayArea(0,0, gstI80DevInfo.usPanelW, gstI80DevInfo.usPanelH, 2);
}
void IT8951DisplayExample2()
{
IT8951LdImgInfo stLdImgInfo;
IT8951AreaImgInfo stAreaImgInfo;
//--------------------------------------------------------------------------------------------
// Regular display - Display Any Gray colors with Mode 2 or others
//--------------------------------------------------------------------------------------------
//Preparing buffer to All black (8 bpp image)
//or you can create your image pattern here..
memset(gpFrameBuf , 0x00, 1200 * 51 * 1);
memset(gpFrameBuf+1200 * 51 * 1, 0x11, 1200 * 51 * 1);
memset(gpFrameBuf+1200 * 51 * 2, 0x22, 1200 * 51 * 1);
memset(gpFrameBuf+1200 * 51 * 3, 0x33, 1200 * 51 * 1);
memset(gpFrameBuf+1200 * 51 * 4, 0x44, 1200 * 51 * 1);
memset(gpFrameBuf+1200 * 51 * 5, 0x55, 1200 * 51 * 1);
memset(gpFrameBuf+1200 * 51 * 6, 0x66, 1200 * 51 * 1);
memset(gpFrameBuf+1200 * 51 * 7, 0x77, 1200 * 51 * 1);
memset(gpFrameBuf+1200 * 51 * 8, 0x88, 1200 * 51 * 1);
memset(gpFrameBuf+1200 * 51 * 9, 0x99, 1200 * 51 * 1);
memset(gpFrameBuf+1200 * 51 * 10, 0xaa, 1200 * 51 * 1);
memset(gpFrameBuf+1200 * 51 * 11, 0xbb, 1200 * 51 * 1);
memset(gpFrameBuf+1200 * 51 * 12, 0xcc, 1200 * 51 * 1);
memset(gpFrameBuf+1200 * 51 * 13, 0xdd, 1200 * 51 * 1);
memset(gpFrameBuf+1200 * 51 * 14, 0xee, 1200 * 51 * 1);
memset(gpFrameBuf+1200 * 51 * 15, 0xff, (1200*825)-(1200 * 51 * 15));
IT8951WaitForDisplayReady();
//Setting Load image information
stLdImgInfo.ulStartFBAddr = (uint32_t)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 = gstI80DevInfo.usPanelW;
stAreaImgInfo.usHeight = gstI80DevInfo.usPanelH;
//Load Image from Host to IT8951 Image Buffer
IT8951HostAreaPackedPixelWrite(&stLdImgInfo, &stAreaImgInfo);//Display function 2
//Display Area ?V (x,y,w,h) with mode 2 for fast gray clear mode - depends on current waveform
IT8951DisplayArea(0,0, gstI80DevInfo.usPanelW, gstI80DevInfo.usPanelH, 2);
}
/*
extern const unsigned char pic[];
void IT8951DisplayExample3()
{
IT8951LdImgInfo stLdImgInfo;
IT8951AreaImgInfo stAreaImgInfo;
uint32_t i;
for (i = 0;i < 1200*825;i++)
{
gpFrameBuf[i] = pic[i];
}
IT8951WaitForDisplayReady();
//Setting Load image information
stLdImgInfo.ulStartFBAddr = (uint32_t)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 = 1200;
stAreaImgInfo.usHeight = 825;
//Load Image from Host to IT8951 Image Buffer
IT8951HostAreaPackedPixelWrite(&stLdImgInfo, &stAreaImgInfo);//Display function 2
//Display Area ?V (x,y,w,h) with mode 2 for fast gray clear mode - depends on current waveform
IT8951DisplayArea(0,0, gstI80DevInfo.usPanelW, gstI80DevInfo.usPanelH, 2);
}
*/
void IT8951_BMP_Example(uint32_t x, uint32_t y, uint32_t w, uint32_t h)
{
IT8951LdImgInfo stLdImgInfo;
IT8951AreaImgInfo stAreaImgInfo;
EPD_Clear(0xff);
IT8951WaitForDisplayReady();
//Setting Load image information
@ -903,88 +478,3 @@ void IT8951_BMP_Example(uint32_t x, uint32_t y, uint32_t w, uint32_t h)
//Display Area ?V (x,y,w,h) with mode 2 for fast gray clear mode - depends on current waveform
//IT8951DisplayArea(0,0, gstI80DevInfo.usPanelW, gstI80DevInfo.usPanelH, 2);
}
//-----------------------------------------------------------
// Load 1bpp image flow (must display with IT8951DisplayArea1bpp()
//-----------------------------------------------------------
void IT8951Load1bppImage(uint8_t* p1bppImgBuf, uint16_t usX, uint16_t usY, uint16_t usW, uint16_t usH)
{
IT8951LdImgInfo stLdImgInfo;
IT8951AreaImgInfo stAreaImgInfo;
//Setting Load image information
stLdImgInfo.ulStartFBAddr = (uint32_t) p1bppImgBuf;
stLdImgInfo.usEndianType = IT8951_LDIMG_L_ENDIAN;
stLdImgInfo.usPixelFormat = IT8951_8BPP; //we use 8bpp because IT8951 dose not support 1bpp mode for load image?Aso we use Load 8bpp mode ,but the transfer size needs to be reduced to Size/8
stLdImgInfo.usRotate = IT8951_ROTATE_0;
stLdImgInfo.ulImgBufBaseAddr = gulImgBufAddr;
//Set Load Area
stAreaImgInfo.usX = usX/8;
stAreaImgInfo.usY = usY;
stAreaImgInfo.usWidth = usW/8;//1bpp, Chaning Transfer size setting to 1/8X of 8bpp mode
stAreaImgInfo.usHeight = usH;
printf("IT8951HostAreaPackedPixelWrite [wait]\n\r");
//Load Image from Host to IT8951 Image Buffer
IT8951HostAreaPackedPixelWrite(&stLdImgInfo, &stAreaImgInfo);//Display function 2
}
//-----------------------------------------------------------
//Test function 3---Example of Display 1bpp Flow
//-----------------------------------------------------------
void IT8951Display1bppExample()
{
IT8951AreaImgInfo stAreaImgInfo;
//Prepare image
//Write pixel 0x00(Black) to Frame Buffer
//or you can create your image pattern here..
memset(gpFrameBuf, 0x00, (gstI80DevInfo.usPanelW * gstI80DevInfo.usPanelH)/8);//Host Frame Buffer(Source)
//Check TCon is free ? Wait TCon Ready (optional)
IT8951WaitForDisplayReady();
//Load Image and Display
//Set Load Area
stAreaImgInfo.usX = 0;
stAreaImgInfo.usY = 0;
stAreaImgInfo.usWidth = gstI80DevInfo.usPanelW;
stAreaImgInfo.usHeight = gstI80DevInfo.usPanelH;
//Load Image from Host to IT8951 Image Buffer
IT8951Load1bppImage(gpFrameBuf, stAreaImgInfo.usX, stAreaImgInfo.usY, stAreaImgInfo.usWidth, stAreaImgInfo.usHeight);//Display function 4, Arg
//Display Area - (x,y,w,h) with mode 2 for Gray Scale
//e.g. if we want to set b0(Background color) for Black-0x00 , Set b1(Foreground) for White-0xFF
IT8951DisplayArea1bpp(0,0, gstI80DevInfo.usPanelW, gstI80DevInfo.usPanelH, 0, 0x00, 0xFF);
}
void IT8951Display1bppExample2()
{
IT8951AreaImgInfo stAreaImgInfo;
//Prepare image
//Write pixel 0x00(Black) to Frame Buffer
//or you can create your image pattern here..
memset(gpFrameBuf, 0xff, (gstI80DevInfo.usPanelW * gstI80DevInfo.usPanelH)/8);//Host Frame Buffer(Source)
//Check TCon is free ? Wait TCon Ready (optional)
IT8951WaitForDisplayReady();
//Load Image and Display
//Set Load Area
stAreaImgInfo.usX = 0;
stAreaImgInfo.usY = 0;
stAreaImgInfo.usWidth = gstI80DevInfo.usPanelW;
stAreaImgInfo.usHeight = gstI80DevInfo.usPanelH;
//Load Image from Host to IT8951 Image Buffer
IT8951Load1bppImage(gpFrameBuf, stAreaImgInfo.usX, stAreaImgInfo.usY, stAreaImgInfo.usWidth, stAreaImgInfo.usHeight);//Display function 4, Arg
//Display Area - (x,y,w,h) with mode 2 for Gray Scale
//e.g. if we want to set b0(Background color) for Black-0x00 , Set b1(Foreground) for White-0xFF
IT8951DisplayArea1bpp(0,0, gstI80DevInfo.usPanelW, gstI80DevInfo.usPanelH, 0, 0x00, 0xFF);
}
void EPD_Clear(uint8_t Color)
{
//memset(gpFrameBuf, Color, gstI80DevInfo.usPanelW * gstI80DevInfo.usPanelH);
}

4
firmware/src/eink.h
View File

@ -157,10 +157,6 @@ const char* einkDisplayProperties = R"json(
)json";
void initDisplay() {
pinMode(CS, OUTPUT);
pinMode(RESET, OUTPUT);
pinMode(HRDY, INPUT);
IT8951_Init();
}

34
server/einkimage.go
View File

@ -69,6 +69,40 @@ func ConvertToEInkImage(src image.Image, colorSpace ColorSpace) []byte {
return einkImage
}
func min(a, b int) int {
if a < b {
return a
}
return b
}
func GenerateCalibrationImage(width, height int, colorSpace ColorSpace) []byte {
var einkImage []byte
colorCount := len(colorSpace)
// calculate number of rows and columns (sideLength)
sideLengthFloat := math.Sqrt(float64(colorCount))
sideLength := int(sideLengthFloat)
if float64(sideLength) != sideLengthFloat {
sideLength = sideLength + 1
}
rowSpacing := height / sideLength
columnSpacing := width / sideLength
for y := 0; y < height; y++ {
for x := 0; x < width; x++ {
row := y / rowSpacing
column := x / columnSpacing
colorIndex := min(colorCount-1, row*sideLength+column)
einkImage = append(einkImage, colorSpace[colorIndex].Code)
}
}
return packBytesIntoNibbles(einkImage)
}
func packBytesIntoNibbles(input []byte) []byte {
// input length must divisible by 2

19
server/main.go
View File

@ -63,6 +63,22 @@ type ImageProperties struct {
ColorSpace ColorSpace `json:"color_space"`
}
func calibrationImage(w http.ResponseWriter, r *http.Request) {
var imageProps ImageProperties
err := json.NewDecoder(r.Body).Decode(&imageProps)
if err != nil {
http.Error(w, err.Error(), http.StatusBadRequest)
return
}
data := GenerateCalibrationImage(imageProps.Width, imageProps.Height, imageProps.ColorSpace)
fmt.Printf("Bytes to send: %+v\n", len(data))
w.Header().Set("Content-Length", strconv.Itoa(len(data)))
w.Write(data)
}
func fetchImage(w http.ResponseWriter, r *http.Request) {
var imageProps ImageProperties
err := json.NewDecoder(r.Body).Decode(&imageProps)
@ -120,8 +136,9 @@ func main() {
router.Get("/{name}", requestHandler)
router.Group(func(r chi.Router) {
r.Use(basicAuth)
// r.Use(basicAuth)
r.Post("/fetchImage", fetchImage)
r.Post("/calibrationImage", calibrationImage)
})
// Start the HTTP server on port 8080 and log any errors