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Forum Index : Microcontroller and PC projects : ILI9488 drivers: MM2 and MM+
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| matherp Guru  Joined: 11/12/2012 Location: United KingdomPosts: 9796 |
 The 3.5" ILI9488 display is 480x320 pixels and RGB666 and is shown against the 2.8" ILI9341 display for comparison. Drivers are attached for the MM2 and MM+. The pinout on the display is identical to the ILI9341 and it is available from here The MM2 driver supports all the normal drawing commands. In addition the MM+ driver supports transparent text, image load and blit. There is one very strange thing I found on my version of the display: Touch and the SDcard share the SPI port with the display. I found that the SDO(MISO) pin on the display (SPI input from the display to the Micromite) interfered with the SD_MISO and T_DO pins even though the display wasn't selected (CS high). This could be fixed by connecting SDO(MISO) to the Micromite through a 680ohm resistor - very strange. SDO(MISO) should not be connected for the MM2 and is only needed for the MM+ if blit or transparent text are needed. Otherwise leave it disconnected. The display isn't very fast as there is a lot of data to move over the SPI bus (480 * 320 * 3 = 460,800 bytes) for a full screen refresh but if you need a higher resolution display on the MM2 it works nicely. 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rodata 'startup 39494C49 20383834 76697264 6C207265 6564616F 000A0D64 End CSub Source code /******************************************************************************* * * Driver for ILI9488 Display driver written as CSUB * * (c) Peter Mather 2019 with acknowledgements to Peter Carnegie & Geoff Graham * * * This CFunction MUST be compiled with Optimization Level 1, -O1 * -O2,-O3,-Os will compile successfully, but generate exceptions at runtime. * * When Generating the CSUB, use MERGE CSUB mode, and name the CSUB * ILI9488 * * Entry point is function void main( * long long *DC, * long long *RST, * long long *CS * long long *orientation) * * V1.0 2019-05-27 Peter Mather * ******************************************************************************/ #include <stdarg.h> #define Version 100 //Version 1.00 #define _SUPPRESS_PLIB_WARNING // required for XC1.33 Later compiler versions will need PLIB to be installed #include <plib.h> // the pre Harmony peripheral libraries #include "../cfunctions.h" // Change the width and height if required (defined in portrait mode) // or use the constructor to over-ride defaults #define TFT_WIDTH 320 #define TFT_HEIGHT 480 // Delay between some initialisation commands #define TFT_INIT_DELAY 0x80 // Not used unless commandlist invoked // Generic commands used by TFT_eSPI.cpp #define TFT_NOP 0x00 #define TFT_SWRST 0x01 #define TFT_SLPIN 0x10 #define TFT_SLPOUT 0x11 #define TFT_INVOFF 0x20 #define TFT_INVON 0x21 #define TFT_DISPOFF 0x28 #define TFT_DISPON 0x29 #define TFT_CASET 0x2A #define TFT_RASET 0x2B #define TFT_RAMWR 0x2C #define TFT_RAMRD 0x2E #define TFT_MADCTL 0x36 #define TFT_MAD_MY 0x80 #define TFT_MAD_MX 0x40 #define TFT_MAD_MV 0x20 #define TFT_MAD_ML 0x10 #define TFT_MAD_RGB 0x00 #define TFT_MAD_BGR 0x08 #define TFT_MAD_MH 0x04 #define TFT_MAD_SS 0x02 #define TFT_MAD_GS 0x01 #define TFT_IDXRD 0x00 // ILI9341 only, indexed control register read #define LANDSCAPE 1 #define PORTRAIT 2 #define RLANDSCAPE 3 #define RPORTRAIT 4 #define MX170 #if defined(MX170) // SPI pin numbers and registers #define SPI_INP_PIN (HAS_44PINS ? 41 : 14) #define SPI_OUT_PIN (HAS_44PINS ? 20 : 3) #define SPI_CLK_PIN (HAS_44PINS ? 14 : 25) #define SPI_PPS_OPEN PPSInput(2, SDI1, RPB5); PPSOutput(2, RPA1, SDO1) #define SPI_PPS_CLOSE PPSOutput(2, RPA1, NULL) #define SPICON *(volatile unsigned int *)(0xbf805800) //SPI status register #define SPISTAT *(volatile unsigned int *)(0xbf805810) //SPI status register #define SPIBUF *(volatile unsigned int *)(0xbf805820) //SPI output buffer #define SPIBRG *(volatile unsigned int *)(0xbf805830) //SPI output buffer #define SPICON2 *(volatile unsigned int *)(0xbf805840) //SPI status register #define SPISTATCLR *(volatile unsigned int *)(0xbf805814) //SPI status clear register #define ILImode 0x18520 #define ILIbrg 0 #elif defined(MX470) // SPI pin numbers and registers #define SPI_INP_PIN (HAS_100PINS ? 11 : 47) #define SPI_OUT_PIN (HAS_100PINS ? 12 : 5) #define SPI_CLK_PIN (HAS_100PINS ? 10 : 4) #define SPI_PPS_OPEN { if(HAS_100PINS) {PPSInput(2, SDI2, RPG7); PPSOutput(1, RPG8, SDO2); } else {PPSInput(2, SDI2, RPC13); PPSOutput(2, RPG7, SDO2);}} #define SPI_PPS_CLOSE { if(HAS_100PINS) PPSOutput(1, RPG8, NULL); else PPSOutput(2, RPG7, NULL); } #define SPICON *(volatile unsigned int *)(0xbf805A00) //SPI status register #define SPISTAT *(volatile unsigned int *)(0xbf805A10) //SPI status register #define SPIBUF *(volatile unsigned int *)(0xbf805A20) //SPI output buffer #define SPIBRG *(volatile unsigned int *)(0xbf805A30) //SPI output buffer #define SPICON2 *(volatile unsigned int *)(0xbf805A40) //SPI status register #define SPISTATCLR *(volatile unsigned int *)(0xbf805A14) //SPI status clear register #endif #define SPIsend(a) {int j;SPIBUF=a; while((SPISTAT & 0x80)==0); j=SPIBUF;} #define SPIqueue(a) {while(SPISTAT & 0x02){};SPIBUF=a;} int ReadRectangle(int x1, int y1, int x2, int y2, int pos, char *p ); #define SPIsend(a) {int j;SPIBUF=a; while((SPISTAT & 0x80)==0); j=SPIBUF;} // set the chip select for the SPI to low (enabled) // if the SPI is currently set to a different mode or baudrate this will change it accordingly // also, it checks if the chip select pin needs to be changed // set the chip select for SPI1 to high (disabled) void spi_write_data(unsigned char data){ PinSetBit(Option->LCD_CD, LATSET); PinSetBit(Option->LCD_CS, LATCLR); SPIsend(data); PinSetBit(Option->LCD_CS, LATSET); } void spi_write_command(unsigned char data){ PinSetBit(Option->LCD_CD, LATCLR); PinSetBit(Option->LCD_CS, LATCLR); SPIsend(data); PinSetBit(Option->LCD_CS, LATSET); } void spi_write_cd(unsigned char command, int data, ...){ int i; va_list ap; va_start(ap, data); spi_write_command(command); for(i = 0; i < data; i++) spi_write_data((char)va_arg(ap, int)); va_end(ap); } void DefineRegion(int xstart, int ystart, int xend, int yend, int rw) { PinSetBit(Option->LCD_CD, LATCLR); PinSetBit(Option->LCD_CS, LATCLR); SPIsend(TFT_CASET); PinSetBit(Option->LCD_CD, LATSET); SPIsend(xstart >> 8); SPIsend(xstart); SPIsend(xend >> 8); SPIsend(xend); PinSetBit(Option->LCD_CD, LATCLR); SPIsend(TFT_RASET); PinSetBit(Option->LCD_CD, LATSET); SPIsend(ystart >> 8); SPIsend(ystart); SPIsend(yend >> 8); SPIsend(yend); PinSetBit(Option->LCD_CD, LATCLR); if(rw){ SPIsend(TFT_RAMWR); } else { SPIsend(TFT_RAMRD); } PinSetBit(Option->LCD_CS, LATSET); } //Print the bitmap of a char on the video output // x, y - the top left of the char // width, height - size of the char's bitmap // scale - how much to scale the bitmap // fc, bc - foreground and background colour // bitmap - pointer to the bitmap void DrawBitmapSPI(int x1, int y1, int width, int height, int scale, int fc, int bc, unsigned char *bitmap){ int i, j, k, m, n; unsigned char fhb, fmb, flb, bhb, bmb, blb; unsigned int consave=0,brgsave=0,con2save; int vertCoord, horizCoord, XStart, XEnd, YEnd; if(x1>=HRes || y1>=VRes || x1+width*scale<0 || y1+height*scale<0)return; // adjust when part of the bitmap is outside the displayable coordinates vertCoord = y1; if(y1 < 0) y1 = 0; // the y coord is above the top of the screen XStart = x1; if(XStart < 0) XStart = 0; // the x coord is to the left of the left marginn XEnd = x1 + (width * scale) - 1; if(XEnd >= HRes) XEnd = HRes - 1; // the width of the bitmap will extend beyond the right margin YEnd = y1 + (height * scale) - 1; if(YEnd >= VRes) YEnd = VRes - 1;// the height of the bitmap will extend beyond the bottom margin brgsave=SPIBRG; //save any user SPI setup consave=SPICON; con2save=SPICON2; SPICON=0x0; SPICON=0x018260; #ifdef MX470 char *p=0; SPIBRG=0; if(bc == -1) { //special case of overlay text i = 0; j = width * height * scale * scale * 3; p = GetMemory(j); //allocate some temporary memory ReadBuffer(XStart, y1, XEnd, YEnd, p); } #else SPIBRG=0; #endif SPICON2=0xC00; // convert the colours to 565 format fhb = (fc >> 16) & 0b11111111; fmb = (fc >> 8) & 0b11111111; flb = fc & 0xFF; bhb = (bc >> 16) & 0b11111111; bmb = (bc >> 8) & 0b11111111; blb = bc & 0xFF; n=0; DefineRegion(x1, y1, x1 + (width * scale) - 1, y1 + (height * scale) -1,1); PinSetBit(Option->LCD_CD, LATSET); //set CD high PinSetBit(Option->LCD_CS, LATCLR); for(i = 0; i < height; i++) { // step thru the font scan line by line for(j = 0; j < scale; j++) { // repeat lines to scale the font if(vertCoord++ < 0) continue; // we are above the top of the screen if(vertCoord > VRes) return; // we have extended beyond the bottom of the screen horizCoord = x1; for(k = 0; k < width; k++) { // step through each bit in a scan line for(m = 0; m < scale; m++) { // repeat pixels to scale in the x axis if(horizCoord++ < 0) continue; // we have not reached the left margin if(horizCoord > HRes) continue; // we are beyond the right margin if((bitmap[((i * width) + k)/8] >> (((height * width) - ((i * width) + k) - 1) %8)) & 1) { SPIqueue(fhb); SPIqueue(fmb); SPIqueue(flb); n+=3; } else { #ifdef MX470 if(bc==-1){ SPIqueue(p[n+2]); SPIqueue(p[n+1]); SPIqueue(p[n]); n+=3; } else { SPIqueue(bhb); SPIqueue(bmb); SPIqueue(blb); } #else SPIqueue(bhb); SPIqueue(bmb); SPIqueue(blb); #endif } } } } } while((SPISTAT & 0x80)==0); //wait for all writes to complete while(!(SPISTAT & 0x20)){i=SPIBUF;} // clean up rx fifo if not empty SPICON=0; #ifdef MX470 SPI2STATCLR=0x40; #else SPI1STATCLR=0x40; #endif PinSetBit(Option->LCD_CS, LATSET); SPICON=0x0; SPIBRG=brgsave; //restore user (or my) setup SPICON2=con2save; SPICON=consave; } // Draw a rectangle // this is the basic drawing primitive used by most drawing routines // x1, y1, x2, y2 - the coordinates // c - the colour void DrawRectangleSPI(int x1, int y1, int x2, int y2, int c){ unsigned int consave=0,brgsave=0,con2save; int i, t; unsigned char hb, mb, lb; brgsave=SPIBRG; //save any user SPI setup consave=SPICON; con2save=SPICON2; SPICON=0x0; SPICON=0x018260; #ifdef MX470 SPIBRG=0; #else SPIBRG=0; #endif SPICON2=0xC00; // make sure the coordinates are kept within the display area if(x2 <= x1) { t = x1; x1 = x2; x2 = t; } if(y2 <= y1) { t = y1; y1 = y2; y2 = t; } if(x1 < 0) x1 = 0; if(x1 >= HRes) x1 = HRes - 1; if(x2 < 0) x2 = 0; if(x2 >= HRes) x2 = HRes - 1; if(y1 < 0) y1 = 0; if(y1 >= VRes) y1 = VRes - 1; if(y2 < 0) y2 = 0; if(y2 >= VRes) y2 = VRes - 1; // convert the colours to 565 format hb = ((c >> 16) & 0b11111111); mb = ((c >> 8) & 0b11111111); lb = c & 0b11111111; DefineRegion(x1, y1, x2, y2,1); PinSetBit(Option->LCD_CD, LATSET); //set CD high PinSetBit(Option->LCD_CS, LATCLR); i = x2 - x1 + 1; i *= (y2 - y1 + 1); while(i--){ SPIqueue(hb); SPIqueue(mb); SPIqueue(lb); } while((SPISTAT & 0x80)==0); //wait for all writes to complete while(!(SPISTAT & 0x20)){i=SPIBUF;} // clean up rx fifo if not empty SPICON=0; #ifdef MX470 SPI2STATCLR=0x40; #else SPI1STATCLR=0x40; #endif PinSetBit(Option->LCD_CS, LATSET); SPICON=0x0; SPIBRG=brgsave; //restore user (or my) setup SPICON2=con2save; SPICON=consave; } #ifdef MX470 void ReadBufferSPI(int x1, int y1, int x2, int y2, char* p) { unsigned int consave=0,brgsave=0,con2save; int r, N, t; // make sure the coordinates are kept within the display area if(x2 <= x1) { t = x1; x1 = x2; x2 = t; } if(y2 <= y1) { t = y1; y1 = y2; y2 = t; } if(x1 < 0) x1 = 0; if(x1 >= HRes) x1 = HRes - 1; if(x2 < 0) x2 = 0; if(x2 >= HRes) x2 = HRes - 1; if(y1 < 0) y1 = 0; if(y1 >= VRes) y1 = VRes - 1; if(y2 < 0) y2 = 0; if(y2 >= VRes) y2 = VRes - 1; N=(x2- x1+1) * (y2- y1+1); brgsave=SPIBRG; //save any user SPI setup consave=SPICON; con2save=SPICON2; SPICON=0x0; SPICON=0x018260; #ifdef MX470 SPIBRG=1; #else SPIBRG=0; #endif DefineRegion(x1, y1, x2, y2, 0); PinSetBit(Option->LCD_CS, LATCLR); SPIsend(0); //dummy read while(!(SPISTAT & 0x20)){r=SPIBUF;} // clean up rx fifo if not empty r=0; while(N--) { SPIBUF = 0; SPIBUF = 0; SPIBUF = 0; // set up three reads while((SPISTAT & 0x80)==0); p[r+2] = SPIBUF; p[r+1] = SPIBUF; p[r] = SPIBUF; r+=3; } PinSetBit(Option->LCD_CD, LATCLR); PinSetBit(Option->LCD_CS, LATSET); // revert to non enhanced SPI mode SPICON=0x0; SPIBRG=brgsave; //restore user (or my) setup SPICON2=con2save; SPICON=consave; } void DrawBufferSPI(int x1, int y1, int x2, int y2, char* p) { unsigned int i, consave=0,brgsave=0,con2save; brgsave=SPIBRG; //save any user SPI setup consave=SPICON; con2save=SPICON2; SPICON=0x0; SPICON=0x018260; #ifdef MX470 SPIBRG=0; #else SPIBRG=0; #endif SPICON2=0xC00; union colourmap { char rgbbytes[4]; unsigned int rgb; } c; int xx1=x1, yy1=y1, xx2=x2, yy2=y2, x, y, t ; // make sure the coordinates are kept within the display area if(x2 <= x1) { t = x1; x1 = x2; x2 = t; } if(y2 <= y1) { t = y1; y1 = y2; y2 = t; } if(x1 < 0) xx1 = 0; if(x1 >= HRes) xx1 = HRes - 1; if(x2 < 0) xx2 = 0; if(x2 >= HRes) xx2 = HRes - 1; if(y1 < 0) yy1 = 0; if(y1 >= VRes) yy1 = VRes - 1; if(y2 < 0) yy2 = 0; if(y2 >= VRes) yy2 = VRes - 1; DefineRegion(xx1, yy1, xx2, yy2,1); PinSetBit(Option->LCD_CD, LATSET); //set CD high PinSetBit(Option->LCD_CS, LATCLR); for(y=y1;y<=y2;y++){ for(x=x1;x<=x2;x++){ if(x>=0 && x<HRes && y>=0 && y<VRes){ c.rgbbytes[0]=*p++; //this order swaps the bytes to match the .BMP file c.rgbbytes[1]=*p++; c.rgbbytes[2]=*p++; // convert the colours to 565 format SPIqueue(c.rgbbytes[2]); SPIqueue(c.rgbbytes[1]); SPIqueue(c.rgbbytes[0]); } else p+=3; } } while((SPISTAT & 0x80)==0); //wait for all writes to complete while(!(SPISTAT & 0x20)){i=SPIBUF;} // clean up rx fifo if not empty SPICON=0; #ifdef MX470 SPI2STATCLR=0x40; #else SPI1STATCLR=0x40; #endif PinSetBit(Option->LCD_CS, LATSET); SPICON=0x0; SPIBRG=brgsave; //restore user (or my) setup SPICON2=con2save; SPICON=consave; } #endif __attribute__((noinline)) void getFPC(void *a, void *b, volatile unsigned int *c) { *c = (unsigned int) (__builtin_return_address (0) - (b -a)) ; } void pstring(const char *s){ volatile unsigned int libAddr ; getFPC(NULL,&&getFPCLab,&libAddr) ; // warning can be ignored, stupid editor getFPCLab: { } unsigned char * testData = (unsigned char *)((void *)s + libAddr ); MMPrintString(testData); } /******************************************************************************* * * ILI9488 : Initialise the CFunction Driver Sub-System * * Function called to initialise the driver SubSystem * * ILI9488 should be called from MM.STARTUP * On exit, vectors DrawRectangleVector, and DrawBitmapVector will * be set to point to the CFunctions DrawRectangleSPI and * DrawBitmapSPI respectively * * Entry point is function long long main( * long long *DC, * long long *RST, * long long *CS * long long *orientation) * long long *size) * ******************************************************************************/ void main(long long *CD, long long *RST, long long *CS,long long *orientation){ volatile unsigned int libAddr ; getFPC(NULL,&&getFPCLab,&libAddr) ; // warning can be ignored, stupid editor getFPCLab: { } unsigned int consave=0,brgsave=0,con2save; Option->LCD_Reset=*RST; Option->LCD_CD=*CD; Option->LCD_CS=*CS; Option->DISPLAY_ORIENTATION=*orientation + 2; while(Option->DISPLAY_ORIENTATION>3)Option->DISPLAY_ORIENTATION-=4; Option->DISPLAY_TYPE=20; ExtCfg(Option->LCD_Reset,EXT_DIG_OUT,0);ExtCfg(Option->LCD_Reset,EXT_BOOT_RESERVED,0); PinSetBit(Option->LCD_Reset, LATSET); ExtCfg(Option->LCD_CD,EXT_DIG_OUT,0);ExtCfg(Option->LCD_CD,EXT_BOOT_RESERVED,0); PinSetBit(Option->LCD_CD, LATSET); ExtCfg(Option->LCD_CS,EXT_DIG_OUT,0);ExtCfg(Option->LCD_CS,EXT_BOOT_RESERVED,0); PinSetBit(Option->LCD_CS, LATSET); if(ExtCurrentConfig[SPI_OUT_PIN] == EXT_RESERVED) { //already open brgsave=SPIBRG; consave=SPICON; con2save=SPICON2; } if(ExtCurrentConfig[SPI_OUT_PIN]!=EXT_BOOT_RESERVED){ ExtCfg(SPI_OUT_PIN, EXT_DIG_OUT, 0); ExtCfg(SPI_OUT_PIN, EXT_BOOT_RESERVED, 0); ExtCfg(SPI_INP_PIN, EXT_DIG_IN, 0); ExtCfg(SPI_INP_PIN, EXT_BOOT_RESERVED, 0); ExtCfg(SPI_CLK_PIN, EXT_DIG_OUT, 0); ExtCfg(SPI_CLK_PIN, EXT_BOOT_RESERVED, 0); SPI_PPS_OPEN; } SPICON=0x8060; SPIBRG=3; SPICON2=0xC00;// this is defined in IOPorts.h if(!brgsave){ //save my settings brgsave=SPIBRG; consave=SPICON; con2save=SPICON2; } //Reset the ILI9488 PinSetBit(Option->LCD_Reset,LATSET); uSec(10000); PinSetBit(Option->LCD_Reset,LATCLR); uSec(10000); PinSetBit(Option->LCD_Reset,LATSET); spi_write_command(0xE0); // Positive Gamma Control spi_write_data(0x00); spi_write_data(0x03); spi_write_data(0x09); spi_write_data(0x08); spi_write_data(0x16); spi_write_data(0x0A); spi_write_data(0x3F); spi_write_data(0x78); spi_write_data(0x4C); spi_write_data(0x09); spi_write_data(0x0A); spi_write_data(0x08); spi_write_data(0x16); spi_write_data(0x1A); spi_write_data(0x0F); spi_write_command(0XE1); // Negative Gamma Control spi_write_data(0x00); spi_write_data(0x16); spi_write_data(0x19); spi_write_data(0x03); spi_write_data(0x0F); spi_write_data(0x05); spi_write_data(0x32); spi_write_data(0x45); spi_write_data(0x46); spi_write_data(0x04); spi_write_data(0x0E); spi_write_data(0x0D); spi_write_data(0x35); spi_write_data(0x37); spi_write_data(0x0F); spi_write_command(0XC0); // Power Control 1 spi_write_data(0x17); spi_write_data(0x15); spi_write_command(0xC1); // Power Control 2 spi_write_data(0x41); spi_write_command(0xC5); // VCOM Control spi_write_data(0x00); spi_write_data(0x12); spi_write_data(0x80); spi_write_command(TFT_MADCTL); // Memory Access Control spi_write_data(0x48); // MX, BGR spi_write_command(0x3A); // Pixel Interface Format #if defined (ESP32_PARALLEL) spi_write_data(0x55); // 16 bit colour for parallel #else spi_write_data(0x66); // 18 bit colour for SPI #endif spi_write_command(0xB0); // Interface Mode Control spi_write_data(0x00); spi_write_command(0xB1); // Frame Rate Control spi_write_data(0xA0); spi_write_command(0xB4); // Display Inversion Control spi_write_data(0x02); spi_write_command(0xB6); // Display Function Control spi_write_data(0x02); spi_write_data(0x02); spi_write_data(0x3B); spi_write_command(0xB7); // Entry Mode Set spi_write_data(0xC6); spi_write_command(0xF7); // Adjust Control 3 spi_write_data(0xA9); spi_write_data(0x51); spi_write_data(0x2C); spi_write_data(0x82); spi_write_command(TFT_SLPOUT); //Exit Sleep uSec(120000); spi_write_command(TFT_DISPON); //Display on uSec(25000); // End of ILI9488 display configuration int rotation =Option->DISPLAY_ORIENTATION-1; spi_write_command(TFT_MADCTL); switch (rotation) { case 1: // Portrait spi_write_data(TFT_MAD_MX | TFT_MAD_BGR); HRes = TFT_WIDTH; VRes = TFT_HEIGHT; break; case 0: // Landscape (Portrait + 90) spi_write_data(TFT_MAD_MV | TFT_MAD_BGR); HRes = TFT_HEIGHT; VRes = TFT_WIDTH; break; case 3: // Inverter portrait spi_write_data(TFT_MAD_MY | TFT_MAD_BGR); HRes = TFT_WIDTH; VRes = TFT_HEIGHT; break; case 2: // Inverted landscape spi_write_data(TFT_MAD_MX | TFT_MAD_MY | TFT_MAD_MV | TFT_MAD_BGR); HRes = TFT_HEIGHT; VRes = TFT_WIDTH; break; } //Set the DrawRectangle vector to point to our function DrawRectangleVector= (unsigned int)&DrawRectangleSPI + libAddr; //Set the DrawBitmap vector to point to our function DrawBitmapVector=(unsigned int)&DrawBitmapSPI + libAddr; #ifdef MX470 DrawBufferVector=(unsigned int)&DrawBufferSPI + libAddr; ReadBufferVector=(unsigned int)&ReadBufferSPI + libAddr; #endif //CLS DrawRectangle(0,0,HRes-1,VRes-1,0x000000); SPIBRG=brgsave; //restore user (or my) setup SPICON=consave; SPICON2=con2save; static const char startup[]="ILI9488 driver loaded\r\n"; pstring(startup); } |
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goc30 Guru Joined: 12/04/2017 Location: FrancePosts: 435 |
Thank peter (ps: see your PM) I mount dyi for test this ...after...night  |
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| paceman Guru Joined: 07/10/2011 Location: AustraliaPosts: 1329 |
Thanks from me too for this one Peter. The 320 will fit a project I've got a lot better than the 272. Just gotta wait for the slowboat now! Greg |
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| damos Regular Member  Joined: 15/04/2016 Location: AustraliaPosts: 67 |
I recently renewed my SC subscription and thought I would also get some Micromite backpack v3 PCBs and a 3.5" LCD panel. I assembled everything and the console worked perfectly, but when I plugged in the panel, the backlight came on but the console was frozen. When I removed the panel the console worked and said the driver was loaded. Given Peter's comments I checked the PCB wiring and noticed that pin 9 on the LCD panel isn't even connected. I tried a 2.8" panel and it worked perfectly. So I used extenders to connect just pins 1-8. The LCD worked perfectly. I then added extenders one by one expecting it to eventually no longer start. Eventually I had all the wires connected and the LCD and touch both worked perfectly. I removed the extenders and plugged the panel straight into the backpack. It is clear the the backlight is working as the panel is initializing when the screen clears, but the console doesn't work. It is pretty weird, as it almost as if the extra resistance of the extenders is allowing it to work. I put it away as I am happy to use it with extenders if required, but I will appreciate it if anyone has any ideas. |
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Turbo46 Guru Joined: 24/12/2017 Location: AustraliaPosts: 1635 |
I probably can't help but more information would be helpful. Which driver are you using? Peter's or SC's? Did you follow the setup procedure from the article and set the screen parameters to suit the board as per the article? SC does mention the problem with the MISO pin. Bill Keep safe. Live long and prosper. |
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| morgs67 Regular Member Joined: 10/07/2019 Location: AustraliaPosts: 77 |
Found this in an arduino article for using multiple devices on an SPI bus. "// WARNING: Do not connect ILI9488 display SDO to MISO if other devices share the SPI bus (TFT SDO does NOT tristate when CS is high) " Tony |
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| Turbo46 Guru Joined: 24/12/2017 Location: AustraliaPosts: 1635 |
Yes, this is more or less what SC said in their May article when they were first testing the display and also why Peter's 680 ohm resistor is a solution. SC just left it disconnected on the V3 backpack board. Bill Keep safe. Live long and prosper. |
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| damos Regular Member Joined: 15/04/2016 Location: AustraliaPosts: 67 |
Thanks. The driver I am using is the latest version of the Micromite firmware. I tried everything in the article, and I did note the the MISO pin is not connected on the PCB. I was going to use Peter's trick and realized the pin is not even connected. It is just weird that it works through the extension cable, but not when plugged in directly. It is identical wiring either way, possibly an ohm's resistance on each wire between the backpack and the LCD display. |
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TassyJim Guru Joined: 07/08/2011 Location: AustraliaPosts: 6181 |
The extension cable might be adding enough capacitance to make the difference. I would consider capacitance over resistance in this instance. Which pins want the extra capacitance might be difficult to determine. Jim VK7JH MMedit |
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| Turbo46 Guru Joined: 24/12/2017 Location: AustraliaPosts: 1635 |
You could connect a 10k resistor from pin 5 on the 1455 to +5v. That has known to be a problem. Maybe the proximity of the display when plugged in is affecting Rx to the micromite by injecting noise while the signal is initially open circuit. Jim's capacitance suggestion just woke up one of my brain cells. Bill Keep safe. Live long and prosper. |
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| Turbo46 Guru Joined: 24/12/2017 Location: AustraliaPosts: 1635 |
@Damos, Did you ever get your screen working when plugged directly onto the board? Bill Keep safe. Live long and prosper. |
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| damos Regular Member Joined: 15/04/2016 Location: AustraliaPosts: 67 |
I haven't tried. Got carried away on my K9 (as in Dr Who) project, which is now finished and am now working on the TSynth project. I am actually OK with running it through a cable and don't have an immediate need for this display as I have plenty of 2.8" displays and was saving this for something special. After today's post (see TSynth topic), anything that is larger than 2.8" I will probably use HTML. The capabilities on CSS are astounding and there is pretty much nothing you can do in native code that CSS can't do in a couple of lines. |
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| Turbo46 Guru Joined: 24/12/2017 Location: AustraliaPosts: 1635 |
OK, Thanks damos. Keep safe. Live long and prosper. |
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| David_Plumley Newbie  Joined: 03/01/2022 Location: New CaledoniaPosts: 8 |
Hi! I'm trying to run Peter's driver on an ILI9488 display plugged into an MM+ 64-pin backpack board. SC's programs run OK; I've removed the MOSI pin... But I can't get Peter's driver to work. Can I expect Peter's driver to work on my set-up, please? And if it does, can I expect the GUI graphic controls to work OK too? Thank you. David. |
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| Turbo46 Guru Joined: 24/12/2017 Location: AustraliaPosts: 1635 |
Sorry, I can't help but assuming you are using the correct MM+ driver it should work and I would expect the GUI controls to work also. I hope someone can verify that for you. Bill Keep safe. Live long and prosper. |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 9796 |
I hope that is a typo. The MISO pin is the one to remove (Master in (the uP), Slave out) Edited 2022-01-05 20:01 by matherp |
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| David_Plumley Newbie Joined: 03/01/2022 Location: New CaledoniaPosts: 8 |
You're right, Peter, it is a typo. I have removed the MISO pin (the screen doesn't need to talk to the uP) and my setup works with SC's software. I would much appreciate your answer to my two questions, please. Thank you. David. |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 9796 |
Just tested and the MM+ version posted above woks perfectly on MM+ V5.05.05 and as long as MISO is disconnected touch will work and therefore GUI controls |
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| Turbo46 Guru Joined: 24/12/2017 Location: AustraliaPosts: 1635 |
Thanks Peter, then I'm guessing that David should verify that he is using the correct pins. He may need to modify the pins in: Sub mm.startup ILI9488 27,28,24, 1 ' landscape End Sub To suit the backpack if they are different? @David, Welcome to the forum by the way. Perhaps if you don't get help with your specific problem you could start a new post. Bill Keep safe. Live long and prosper. |
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| David_Plumley Newbie Joined: 03/01/2022 Location: New CaledoniaPosts: 8 |
Is the order of the pin numbers in the startup sub-routine as per the "Stop Press" on page 39 of SC August 2019 (The Backpack V3 article by Tim Blythman)? i.e. ILI9488 <CD>, <RST>, <CS>, <orientation>. If so, then my startup subroutine is Sub mm.startup as per the SC article.ILI9488 2, 23, 29, 1 End Sub Incidently, I notice that loading the ILI9488 driver has created OPTION LCDPANEL USER 0, 0 in the LIBRARY. Shouldn't this be ...USER 480, 320 ? When I run GUI TEST LCDPANEL from Tera Term, the screen remains blank, but the console prompt is absent until I press a key, which is as per the display test. So it would seem that the software is working OK (there is no error message) but for the display. Touch works too. I activate the option with OPTION TOUCH 1, 3 but of course I cannot see the four crosses one after the other. But if I press the screen four times, then "Warning: Inaccurate calibration Deviation X = -198, Y = 1670 (pixels)" is displayed on the console before the prompt returns. The library then includes GUI CALIBRATE 0, 2140, 224, 3314, -12935 These values are obviously meaningless, because I pressed the screen in arbitrary positions (there being no crosses displayed). But the tactile software is obviously functioning... I've realised that my E64 is running V5.05.04. I tried to download the V5.05.05 bundle from Geoff's site, but the un-zipping was riddled with errors. Of the two hex files, the MM one decompressed OK but the MM+ one did not...! I've just e-mailed Geoff about it. But being the summer here in the Southern Hemisphere, he might be away on holiday, of course... I don't know whether the V..01 difference will have an effect on my ILI9488 display problem... I've been struggling on and off most of the day on this (except for lunch and a siesta, of course...). I can't see what I'm doing wrong, probably because I can't see the wood for the trees! Some advice would be much appreciated. Thank you. Here in Noumea, it is just after 6PM, 7AM GMT, on Thursday. Dinner time for us. Have a nice day. David. P.S. - Just a reminder: I've plugged my ILI9488 into a uMite+ LCD Backpack board which carries uMite+64 chip. |
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