I have a iLi8486 txt touchscreen that I cannot get the SD card to be read to upload anything. I really need it to upload and run a sketch. Is there anything you guys can do to help me? The board I have is an Uno WiFi rev 2
Not with the information given. Post the code you have tried(using code tags) so that we may see where it is you may have gone wrong. See: How to get the best out of this forum
You cannot run code from an SD card. you can only save or retrieve data from it. Code can only be uploaded to and run from the flash memory on the arduino board.
I’ve been trying multiple libraries. Mcufriend and the build in SD. I cannot get them to work even when I define the pins are hardware spi
We cannot offer any help if you cannot let us see what your code 5doing.
I will as soon as possible. Currently on toddler duty. I appreciate you all offering to hep. I apologize for not uploading the sketch with my original post.
// MCUFRIEND UNO shields have microSD on pins 10, 11, 12, 13
// The official <SD.h> library only works on the hardware SPI pins
// e.g. 11, 12, 13 on a Uno (or STM32 Nucleo)
//
// copy all your BMP files to the root directory on the microSD with your PC
// (or another directory)
#include <SPI.h> // f.k. for Arduino-1.5.2
//#define USE_SDFAT
#include <SD.h> // Use the official SD library on hardware pins
#include <Adafruit_GFX.h> // Hardware-specific library
#include <MCUFRIEND_kbv.h>
MCUFRIEND_kbv tft;
#if defined(ESP32)
#define SD_CS 5
#else
#define SD_CS 10
#endif
#define NAMEMATCH "" // "" matches any name
//#define NAMEMATCH "tiger" // tiger.bmp
#define PALETTEDEPTH 0 // do not support Palette modes
//#define PALETTEDEPTH 8 // support 256-colour Palette
char namebuf[32] = "/"; //BMP files in root directory
//char namebuf[32] = "/bitmaps/"; //BMP directory e.g. files in /bitmaps/*.bmp
File root;
int pathlen;
void setup()
{
uint16_t ID;
Serial.begin(9600);
Serial.print("Show BMP files on TFT with ID:0x");
ID = tft.readID();
Serial.println(ID, HEX);
if (ID == 0x0D3D3) ID = 0x9481;
tft.begin(ID);
tft.fillScreen(0x001F);
tft.setTextColor(0xFFFF, 0x0000);
bool good = SD.begin(SD_CS);
if (!good) {
Serial.print(F("cannot start SD"));
while (1);
}
root = SD.open(namebuf);
pathlen = strlen(namebuf);
}
void loop()
{
char *nm = namebuf + pathlen;
File f = root.openNextFile();
uint8_t ret;
uint32_t start;
if (f != NULL) {
#ifdef USE_SDFAT
f.getName(nm, 32 - pathlen);
#else
strcpy(nm, (char *)f.name());
#endif
f.close();
strlwr(nm);
if (strstr(nm, ".bmp") != NULL && strstr(nm, NAMEMATCH) != NULL) {
Serial.print(namebuf);
Serial.print(F(" - "));
tft.fillScreen(0);
start = millis();
ret = showBMP(namebuf, 5, 5);
switch (ret) {
case 0:
Serial.print(millis() - start);
Serial.println(F("ms"));
delay(5000);
break;
case 1:
Serial.println(F("bad position"));
break;
case 2:
Serial.println(F("bad BMP ID"));
break;
case 3:
Serial.println(F("wrong number of planes"));
break;
case 4:
Serial.println(F("unsupported BMP format"));
break;
case 5:
Serial.println(F("unsupported palette"));
break;
default:
Serial.println(F("unknown"));
break;
}
}
}
else root.rewindDirectory();
}
#define BMPIMAGEOFFSET 54
#define BUFFPIXEL 20
uint16_t read16(File& f) {
uint16_t result; // read little-endian
f.read((uint8_t*)&result, sizeof(result));
return result;
}
uint32_t read32(File& f) {
uint32_t result;
f.read((uint8_t*)&result, sizeof(result));
return result;
}
uint8_t showBMP(char *nm, int x, int y)
{
File bmpFile;
int bmpWidth, bmpHeight; // W+H in pixels
uint8_t bmpDepth; // Bit depth (currently must be 24, 16, 8, 4, 1)
uint32_t bmpImageoffset; // Start of image data in file
uint32_t rowSize; // Not always = bmpWidth; may have padding
uint8_t sdbuffer[3 * BUFFPIXEL]; // pixel in buffer (R+G+B per pixel)
uint16_t lcdbuffer[(1 << PALETTEDEPTH) + BUFFPIXEL], *palette = NULL;
uint8_t bitmask, bitshift;
boolean flip = true; // BMP is stored bottom-to-top
int w, h, row, col, lcdbufsiz = (1 << PALETTEDEPTH) + BUFFPIXEL, buffidx;
uint32_t pos; // seek position
boolean is565 = false; //
uint16_t bmpID;
uint16_t n; // blocks read
uint8_t ret;
if ((x >= tft.width()) || (y >= tft.height()))
return 1; // off screen
bmpFile = SD.open(nm); // Parse BMP header
bmpID = read16(bmpFile); // BMP signature
(void) read32(bmpFile); // Read & ignore file size
(void) read32(bmpFile); // Read & ignore creator bytes
bmpImageoffset = read32(bmpFile); // Start of image data
(void) read32(bmpFile); // Read & ignore DIB header size
bmpWidth = read32(bmpFile);
bmpHeight = read32(bmpFile);
n = read16(bmpFile); // # planes -- must be '1'
bmpDepth = read16(bmpFile); // bits per pixel
pos = read32(bmpFile); // format
if (bmpID != 0x4D42) ret = 2; // bad ID
else if (n != 1) ret = 3; // too many planes
else if (pos != 0 && pos != 3) ret = 4; // format: 0 = uncompressed, 3 = 565
else if (bmpDepth < 16 && bmpDepth > PALETTEDEPTH) ret = 5; // palette
else {
bool first = true;
is565 = (pos == 3); // ?already in 16-bit format
// BMP rows are padded (if needed) to 4-byte boundary
rowSize = (bmpWidth * bmpDepth / 8 + 3) & ~3;
if (bmpHeight < 0) { // If negative, image is in top-down order.
bmpHeight = -bmpHeight;
flip = false;
}
w = bmpWidth;
h = bmpHeight;
if ((x + w) >= tft.width()) // Crop area to be loaded
w = tft.width() - x;
if ((y + h) >= tft.height()) //
h = tft.height() - y;
if (bmpDepth <= PALETTEDEPTH) { // these modes have separate palette
//bmpFile.seek(BMPIMAGEOFFSET); //palette is always @ 54
bmpFile.seek(bmpImageoffset - (4<<bmpDepth)); //54 for regular, diff for colorsimportant
bitmask = 0xFF;
if (bmpDepth < 8)
bitmask >>= bmpDepth;
bitshift = 8 - bmpDepth;
n = 1 << bmpDepth;
lcdbufsiz -= n;
palette = lcdbuffer + lcdbufsiz;
for (col = 0; col < n; col++) {
pos = read32(bmpFile); //map palette to 5-6-5
palette[col] = ((pos & 0x0000F8) >> 3) | ((pos & 0x00FC00) >> 5) | ((pos & 0xF80000) >> 8);
}
}
// Set TFT address window to clipped image bounds
tft.setAddrWindow(x, y, x + w - 1, y + h - 1);
for (row = 0; row < h; row++) { // For each scanline...
// Seek to start of scan line. It might seem labor-
// intensive to be doing this on every line, but this
// method covers a lot of gritty details like cropping
// and scanline padding. Also, the seek only takes
// place if the file position actually needs to change
// (avoids a lot of cluster math in SD library).
uint8_t r, g, b, *sdptr;
int lcdidx, lcdleft;
if (flip) // Bitmap is stored bottom-to-top order (normal BMP)
pos = bmpImageoffset + (bmpHeight - 1 - row) * rowSize;
else // Bitmap is stored top-to-bottom
pos = bmpImageoffset + row * rowSize;
if (bmpFile.position() != pos) { // Need seek?
bmpFile.seek(pos);
buffidx = sizeof(sdbuffer); // Force buffer reload
}
for (col = 0; col < w; ) { //pixels in row
lcdleft = w - col;
if (lcdleft > lcdbufsiz) lcdleft = lcdbufsiz;
for (lcdidx = 0; lcdidx < lcdleft; lcdidx++) { // buffer at a time
uint16_t color;
// Time to read more pixel data?
if (buffidx >= sizeof(sdbuffer)) { // Indeed
bmpFile.read(sdbuffer, sizeof(sdbuffer));
buffidx = 0; // Set index to beginning
r = 0;
}
switch (bmpDepth) { // Convert pixel from BMP to TFT format
case 24:
b = sdbuffer[buffidx++];
g = sdbuffer[buffidx++];
r = sdbuffer[buffidx++];
color = tft.color565(r, g, b);
break;
case 16:
b = sdbuffer[buffidx++];
r = sdbuffer[buffidx++];
if (is565)
color = (r << 8) | (b);
else
color = (r << 9) | ((b & 0xE0) << 1) | (b & 0x1F);
break;
case 1:
case 4:
case 8:
if (r == 0)
b = sdbuffer[buffidx++], r = 8;
color = palette[(b >> bitshift) & bitmask];
r -= bmpDepth;
b <<= bmpDepth;
break;
}
lcdbuffer[lcdidx] = color;
}
tft.pushColors(lcdbuffer, lcdidx, first);
first = false;
col += lcdidx;
} // end cols
} // end rows
tft.setAddrWindow(0, 0, tft.width() - 1, tft.height() - 1); //restore full screen
ret = 0; // good render
}
bmpFile.close();
return (ret);
}
It keeps stating that the SD card cannot start. I try to use the built in SD card info and it will not read it either
I can't comment on the code, other than that it may be unnecessarily verbose, and is certainly out of my league. But I would rather see your comment on the second part of reply #2.
Nonetheless:
Code problem
It could be that the "cannot start SD" you see on the serial monitor is no more than that, and the card is actually good to go.
Hardware problem
It may also be that it really "can't start" but that is because it isn't connected, in which event no amount of swapping libraries or (gasp!) specifying SPI pins will save you. You may find that you need to solder bridge across a couple of pads to get CS working or, if you are lucky, you now know what that pin jumper at the bottom of the package was for.
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