📝 Ender 3 S1 - STM32F1 vs STM32F4, and DACAI info (#765)

config/examples/Creality/Ender-3 S1/LCD Files/README.md

@@ -0,0 +1,35 @@
+# Ender 3 S1
+
+# Display firmware, boot image and icons compilations
+
+Currently Creality provides two kinds of screen units:
+
+**Original Ender 3V2 DWIN display**  
+![Ender3v2-DWIN](https://user-images.githubusercontent.com/2745567/156829365-a58a3afc-77e3-40b9-9e16-5edfe3073de8.jpg)
+
+**Original Ender 3S1 DACAI display**  
+![Ender3S1-DACAI](https://user-images.githubusercontent.com/2745567/156829472-2c38a4ab-bdde-4c21-b78f-a30692c96500.jpg)
+
+For the Ender 3S1 you must to use the `private` display firmware / icon assets, available here: `../config/examples/Creality/Ender-3 V2/LCD Files`
+
+## How to install
+1. Get an SD card of 8GB or less.
+1. Format the SD card MBR, FAT32 and with a 4 KB sector size
+1. Copy the `private` directory in the Root of SD
+1. Turn off your printer
+1. Disconnect and disassembly the screen unit
+1. Install the SD card into the internal slot of the screen unit
+1. Reconnect the screen to the printer
+1. Turn on the printer and wait for the display to complete all tasks, confirming the procedure success, with the progress bar at 100%
+1. Turn off the printer and remove the SD card from the screen unit
+1. Reassembly the screen unit 
+1. Turn on the printer and verify that the screen assets were updated
+  
+If you want to change only the icons, then you can leave only the **9.ICO** file inside of the DWIN_SET folder.  
+If you weren't able to update the display, verify the format of the SD Card (MBR, FAT32 and allocation unit of 4096 bytes) and the CRC of the files.
+  
+Be sure to leave **only** the `private` folder at the root of the card.  
+  
+---
+
+In: https://github.com/mriscoc/Ender3V2S1/blob/Ender3V2S1-Released/display%20assets/readme.md

config/examples/Creality/Ender-3 S1/README.md

@@ -1,20 +1,19 @@
 # Ender 3 S1
 
-## Flashing Firmware
+## Flashing Mainboard Firmware
 
 The bootloader which handles flashing new firmware on this board remembers the last filename you used.
 
-Therefore, to flash the compiled firmware binary onto the board you must give the "`firmware.bin`" file on the SD card a unique name, different from the name of the previous firmware file, or you will be greeted with a blank screen on the next boot.
+Therefore, to flash the compiled firmware binary onto the board you must give the "`firmware.bin`" file on the SD card a unique name, different from the name of the previous firmware file, or you will be greeted with a blank screen on the next boot. The file rename is done for you when compiling with PlatformIO. Otherwise, rename the `*.bin` file accordingly.
 
-## Updating the Display
+Pay attention to the two versions of the motherboard for the S1, one is using a SoC STM32F1 and the other using a STM32F4:
 
-Currently there is no Marlin-specific firmware available, so flash the latest official firmware to the display. There are some minor graphical glitches but the display is very usable.
+ - Ender 3 printers that come with a firmware version **1.x.x** have the **STM32F1** chip.
+ - Ender 3 printers that come with a firmware version **3.x.x** have the **STM32F4** chip.
+ - Check the version number on the STM32Fx chip itself to confirm you have the correct version.
+ - Installing 1.x.x stock firmware or a compiled one to the target **STM32F1** on **STM32F4** mainboards **might brick** them! And _vice-versa_.
+    
+Where to put the firmware file on the SDCard:
 
-Download the latest Ender 3 S1 firmware [from www.creality.com/download](https://www.creality.com/download) and flash as follows:
-
-- Format an SD card using the FAT32 filesystem with 4K cluster size.
-- Copy the `private` folder to the microSD card and insert the card into the slot on the back of the display unit.
-- Power on the machine and wait for the screen to show a filled progress bar and show "Update finished!". The display will reset shortly after displaying this message.
-- Power off the machine.
-- Remove the SD card from the back of the display.
-- Power on to confirm a successful flash.
+ - STM32F1 board: Put the `*.bin` file into the root folder.
+ - STM32F4 board: Pit the `*.bin` file into a folder named `STM32F4_UPDATE`.