An Arduino firmware to read, write, erase, and transfer files to SPI NOR Flash via UART.

• SPI NOR Flash Memory Control

  • Only support 1x SPI
  • Erase specific blocks (4KB, 32KB, 64KB)
  • Write and read single bytes or pages
  • Chip erase (full memory wipe)
  • Read device ID and status registers
  • Configurable SPI settings
  • Compatible with 25-series SPI NOR Flash (e.g., Winbond, Macronix, SST, Microchip) OPCODE LIST

• Data Integrity & Transfers

  • CRC32 Calculation to verify memory integrity
  • Dump Flash Memory to UART (for logging or backups)
  • Custom SPI Transactions (for example costum OPCODE)
  • Receive files via XMODEM and store them in SPI NOR Flash
  • Send files via XMODEM from Flash to UART

• Hardware Control

  • Software & hardware reset support

• Arduino Minima R4
• Any board level translator bi-directional
• SPI-NOR Flash 25-series
  • Tested MX25L128356(SPI-NOR Datasheet)

See in a your SPI-NOR datasheet if are compatible OPCODE with list below

The Arduino Serial Monitor does not support file transfers, so it must not be used for sending or receiving data.
For file transfers, use Tera Term or another terminal emulator that supports the XMODEM protocol, or send binary file per size 256byte.

1. Open Tera Term.

2. Go to Setup > Terminal:

   • Receive: AUTO
   • Transmit: CR (Carriage Return)

3. Go to Setup > Serial Port:

   • Speed: 115200 baud
   • Data Bits: 8
   • Parity: None
   • Stop Bits: 1
   • Flow Control: Xon/Xoff
   • Transmit Delay: 0ms

• Ensure flow control is enabled (Xon/Xoff).
• Do not use Arduino Serial Monitor for file transfers. Set Carriage Return and 115200
• For debugging only, the Arduino Serial Monitor can still be used to display logs a

• Read Flash ('4')

  1. Enter the start address (hex).
  2. Enter the number of bytes to read (hex).
  3. Data is displayed in hexadecimal format.
     • The output format is 0xADDR: DATA DATA DATA | ASCII |
     • Each row contains 16 bytes. The right image is Notepad++ Hex view

• Reads data from UART and writes it to flash, remember erase flash!!! ('9')

  1. Enter the starting address where you want to start writing (hex).

     

  2. Configure Teraterm to send binary file per size, do not send any characters from the keyboard

     

  3. The file transfer will start

     

  4. At the end the file size must match the size indicated. Compare CRC32 with your file on your pc using 7zip(or similar)

     

• CRC32 calc ('10')

  1. Enter the starting address where you want to start cal CRC32 (hex).

  2. Enter the number of byte ugual to size file (hex) in this example 2192112byte is 2172F0

  3. Compare CRC32 file on your pc using 7zip(or similar)

     

• Receive file from XMODEM and write data into flash ('15')

  1. Enter the number of byte ugual to size file (hex) in this example 2192112byte is 2172F0

  2. Enter the starting address where you want to start writing (hex).

     

  3. Send file with XMODEM protocol

     

  4. It will open automatically

     

  5. At the end

     

git clone https://github.com/Jampag/UART_to_SPI-NOR.git