Troubleshooting • Help with waveshare 7in5 b display with pico

Code:

static void process_received_image(void) {    printf("Processing received image data (%d bytes)\n", http_client.receive_length);        // Validate buffer pointers before using them    uint8_t* black_buffer = display_get_black_buffer();    uint8_t* red_buffer = display_get_red_buffer();        if (!black_buffer || !red_buffer) {        printf("ERROR: Invalid display buffer pointers\n");        return;    }        // Check that we have enough data    if (http_client.receive_length < DISPLAY_BUFFER_SIZE * 2) {        printf("ERROR: Not enough image data (need %d bytes, got %d)\n",                DISPLAY_BUFFER_SIZE * 2, http_client.receive_length);        return;    }        printf("Copying %d bytes to black buffer...\n", DISPLAY_BUFFER_SIZE);    memcpy(black_buffer, http_client.receive_buffer, DISPLAY_BUFFER_SIZE);        printf("Copying %d bytes to red buffer...\n", DISPLAY_BUFFER_SIZE);    memcpy(red_buffer, http_client.receive_buffer + DISPLAY_BUFFER_SIZE, DISPLAY_BUFFER_SIZE);        printf("Updating display...\n");    display_update();        printf("Display updated successfully\n");        // Reset client data - avoids potential memory corruption    http_client.receiving_image = false;        // Update the last update time for adaptive checking    last_update_time = get_system_time_ms();    printf("Updated last_update_time to %lu\n", last_update_time);}

Code:

// Update the display with current buffer contentsbool display_update(void) {    // Make sure we have valid buffers    if (!black_buffer || !red_buffer) {        printf("ERROR: Display buffers not initialized\n");        return false;    }        // Add memory usage monitoring    printf("Sending %d bytes to display...\n", DISPLAY_BUFFER_SIZE * 2);        // Call the display function    EPD_7IN5B_V2_Display(black_buffer, red_buffer);    printf("Display update completed successfully\n");        // Since EPD_7IN5B_V2_Display doesn't have error reporting,    // we assume success if it returns    return true;}

Code:

/******************************************************************************function :Sends the image buffer in RAM to e-Paper and displaysparameter:******************************************************************************/void EPD_7IN5B_V2_Display(const UBYTE *blackimage, const UBYTE *ryimage){    UDOUBLE Width, Height;    Width =(EPD_7IN5B_V2_WIDTH % 8 == 0)?(EPD_7IN5B_V2_WIDTH / 8 ):(EPD_7IN5B_V2_WIDTH / 8 + 1);    Height = EPD_7IN5B_V2_HEIGHT; //send black data    EPD_7IN5B_V2_SendCommand(0x10);    for (UDOUBLE j = 0; j < Height; j++) {        for (UDOUBLE i = 0; i < Width; i++) {            EPD_7IN5B_V2_SendData(blackimage[i + j * Width]);        }    }    //send red data    EPD_7IN5B_V2_SendCommand(0x13);    for (UDOUBLE j = 0; j < Height; j++) {        for (UDOUBLE i = 0; i < Width; i++) {            EPD_7IN5B_V2_SendData(~ryimage[i + j * Width]);        }    }    EPD_7IN5B_V2_TurnOnDisplay();}