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Xinyuan-LilyGO / LilyGo-EPD47

GNU General Public License v3.0
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Draw an image from the SD card #91

Open FrancescSobrevela opened 1 year ago

FrancescSobrevela commented 1 year ago

Hello again. In my project now I need to draw an image on the screen. This image is inside the SD card. Anyone knows how can I do it? Thanks

lbuque commented 1 year ago

@FrancescSobrevela Can you refer to the following code, is it helpful? https://github.com/Xinyuan-LilyGO/LilyGo-EPD47/blob/master/examples/wifi_sync/wifi_sync.ino#L418-L432

Zeyin commented 10 months ago

Thanks @lbuque!

But I got this error while following the link provided. Do you know what might be the root cause of the below stacktrace?

09:44:39.151 -> Try to display img 2.jpg 09:44:41.064 -> Image length is 148463 09:44:41.064 -> Guru Meditation Error: Core 1 panic'ed (StoreProhibited). Exception was unhandled. 09:44:41.064 -> 09:44:41.064 -> Core 1 register dump: 09:44:41.064 -> PC : 0x400570e8 PS : 0x00060f30 A0 : 0x8200be7a A1 : 0x3fcebd10
09:44:41.064 -> A2 : 0x00000000 A3 : 0xffffffff A4 : 0x0007e900 A5 : 0x00000000
09:44:41.064 -> A6 : 0x00000016 A7 : 0x00007e90 A8 : 0x8202d57d A9 : 0x3fcebd80
09:44:41.064 -> A10 : 0x3fcebe2c A11 : 0x3c0fa708 A12 : 0x00000016 A13 : 0x00000100
09:44:41.096 -> A14 : 0x3fca0a40 A15 : 0x00000000 SAR : 0x00000010 EXCCAUSE: 0x0000001d
09:44:41.096 -> EXCVADDR: 0x00000000 LBEG : 0x400570e8 LEND : 0x400570f3 LCOUNT : 0x00007e8f
09:44:41.096 -> 09:44:41.096 -> 09:44:41.096 -> Backtrace: 0x400570e5:0x3fcebd10 |<-CORRUPTED 09:44:41.096 ->

ZaleAnderson commented 7 months ago

I have an img on my SD Card but every time I run the wifi_sync program it just displays that the FatFS initialization failed with no other output. This is the output from the websever

`FILE SYSTEM Not Detected

URI: /edit Method: GET Arguments: 0`

Any help would be appreciated. I cannot get this sketch to work.

clajarac commented 1 month ago

same problem, help please XD

ZaleAnderson commented 1 month ago

I ended up skiping the example code to take an image from the sd card and instead wrote it to the buffer using the FS, SD, and SPI library (correct me if I am wrong, it's been a long time since I looked at this code)

uint8_t *framebuffer; \ #define FILE_SYSTEM SD \ static bool hasFILE_SYSTEM = false;

void setup() { \ SPI.begin(SD_SCLK, SD_MISO, SD_MOSI, SD_CS); \ bool rlst = SD.begin(SD_CS, SPI); \ framebuffer = (uint8_t *)heap_caps_malloc(EPD_WIDTH * EPD_HEIGHT / 2, MALLOC_CAP_SPIRAM); \ memset(framebuffer, 0xFF, EPD_WIDTH * EPD_HEIGHT / 2); \ }

File jpg = FILE_SYSTEM.open("PATH TO IMAGE ON SD"); \ String jpg_p; \ while (jpg.available()) { \ jpg_p += jpg.readString(); \ } \ Rect_t rect = { \ .x = 0, \ .y = 0, \ .width = EPD_WIDTH, \ .height = EPD_HEIGHT, \ }; \ show_jpg_from_buff((uint8_t *)jpg_p.c_str(), jpg_p.length(), rect);

However it does seem some images cause a freakout and crash the esp. I do not know what causes this, it could be from me converting them to black and white right on the esp and it doing some bad math.