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Flash Management

1. Board Overview

2. Hardware Setting

2.1. Connecting UART0 (Program Flash via UART0 Interface)

  1. UART0: Command Port
  2. The UART Tx/Rx definition may be different from various vendors. If your USB-UART cable doesn't work, please swap Tx/Rx pin, re-plug and try again.

2.2. Connecting 5V power and trun on power switch

Power from Adapter or from Power Bank (USB PD)

2.3. Wake up chip from RTC power domain by pressing PTN button

Please do it every time after plugging in the power

2.4. Set bootstrap settings to manual boot mode (Program Flash via UART0 Interface)

  1. Must set bootstrap settings to manual boot mode
  2. Reset pin or power must be controllable to enter manual boot mode.

3. Program Flash via UART0 Interface

3.1. Flash programmer necessaries

  1. Open command terminal for flash programmer execution Tool path: kl520_sdk\firmware\utils\flash_programmer\flash_programmer.py
  2. Install Necessary python modules: kl520_sdk\firmware\utils\requirements.txt
  3. Limitations: Only the listed argument combinations below are allowed.

3.2. Edit python verification setting

  1. Check UART port number from device manager

  2. Edit setup.py, search “COM_ID” and modify the ID to match your UART port number

EX: COM_ID = 4 # COM4

3.3 Firmware Binary Generation (FW + MODELS)

Generate flash final bin file from other separate bin files. The script combines .bin files in "flash_bin" in predefined order. Moreover, the addressing is in 4KB alignment

Command

$ python3 bin_gen.py <options>

    options argument:

    -h, --help      Show this help message and exit
    -p, --CPU_ONLY  SPL/SCPU/NCPU without model

Output flash_image.bin

Note

  1. Component, nef_utility, is used by bin_gen. If in Linux, must chmod +x ../nef_utility/nef_utility_linux first

  2. The following bin files are must

flash_bin/
├── boot_spl.bin                        // bool spl bin file
├── fw_loader.bin                       // LOADER bin file (or copied from plus/res/firmware/KL520)
├── fw_ncpu.bin                         // SCPU FW bin file (generated by Keil)
├── fw_scpu.bin                         // NCPU FW bin file (generated by Keil)
├── prog_fw_loader_flash-boot.bin       // switch to flash boot bin file (or copied from /utils/JLink_programmer/bin/)
├── models_520.nef                      // model information (or copied from plus/res/models/KL520)

3.4 Flash Chip Programming (FW + DATA)

$ python flash_programmer.py -a flash_image.bin

Please press RESET BTN while you are seeing “Please press reset button!!”

Afterwards, just wait until all progresses are finished (erase, program, verify)

Note flash_programmer.py -a means to do flash chip erase + programming + verification

3.5 Flash Verification (optional)

$ python flash_programmer.py -v flash_image.bin

3.6 Flash Erase (optional)

$ python flash_programmer.py -e

3.7 Flash Partial Programming example (optional)

$ python flash_programmer.py -i 0x00002000 -p fw_scpu.bin

# "**-i**" means the flash index/address to program
# "**-p**" means the FW binary to program

4. Program Flash via JTAG/SWD Interface

Connect JTAG/SWD.

  1. Check your flash manufacturer: Winbond or Mxic or GigaDevice

  2. Select a specific device based on flash manufacturer

EX:

device KL520-WB  //Winbond
device KL520-MX  //Mxic
device KL520-GD  //GigaDevice
  1. Copy the bin file to kl520_sdk\firmware\utils\JLink_programmer\bin folder EX: flash_image.bin, boot_spl.bin, fw_scpu.bin, fw_ncpu.bin, etc.

4.3. To Program composed flash_image.bin

Check existence of bin/flash_image.bin composed by utils/bin_gen in previous steps

Afterwards, just wait until all progresses are finished (chip erase, program, verify)

4.4. (optional) To Program Specific Bin Files to Specific Flash Addresses

  1. Edit flash_prog_partial.jlink device setting

  2. Copy the bin file to kl520_sdk\firmware\utils\JLink_programmer\bin\

  3. Select a specific device+’-P’ based on flash manufacturer

EX:

device KL520-WB-P    //Winbond
device KL520-MX-P    //Mxic
device KL520-GD-P    //GigaDevice
  1. Edit loadbin command: Load *.bin file into target memory

Syntax:

loadbin <filename>, <addr>
//loadbin .\bin\boot_spl.bin,0x00000000
//loadbin .\bin\fw_loader.bin,0x00002000
//loadbin .\bin\prog_fw_loader_flash-boot.bin,0x00029000
loadbin .\bin\fw_scpu.bin,0x00030000
//loadbin .\bin\fw_loader.bin,0x00041000
loadbin .\bin\fw_ncpu.bin,0x00068000
  1. Execute flash_prog_partial.bat and wait until all progresses are finished

5.4. (Optional) To Program Flash Using Partial Bin Files as Usb Boot Mode

  1. Check your flash manufacturer: Winbond or Mxic or GigaDevice

  2. Go to folder kl520_sdk\firmware\utils\JLink_programmer\

  3. Edit prog_fw_loader_usb-boot.jlink

  4. Select a specific device+’-P’ based on flash manufacturer to

EX:

device KL520-WB-P    //Winbond
device KL520-MX-P    //Mxic
device KL520-GD-P    //GigaDevice

Syntax:

loadbin <filename>, <addr>
loadbin .\bin\boot_spl.bin,0x00000000
loadbin .\bin\fw_loader.bin,0x00002000
loadbin .\bin\prog_fw_loader_usb-boot.bin,0x00029000
loadbin .\bin\fw_loader.bin,0x00041000
  1. Execute prog_fw_loader_usb-boot.bat and wait until all progresses are finished (chip erase, program, verify)

5.5. (Optional) To Program Flash Using Partial Bin Files as Flash Boot Mode

  1. Check your flash manufacturer: Winbond or Mxic or GigaDevice

  2. Go to folder kl520_sdk\firmware\utils\JLink_programmer\

  3. Edit prog_fw_loader_flash-boot.jlink

  4. Select a specific device+’-P’ based on flash manufacturer to

EX:

device KL520-WB-P    //Winbond
device KL520-MX-P    //Mxic
device KL520-GD-P    //GigaDevice

Syntax:

loadbin <filename>, <addr>
loadbin .\bin\boot_spl.bin,0x00000000
loadbin .\bin\fw_loader.bin,0x00002000
loadbin .\bin\prog_fw_loader_flash-boot.bin,0x00029000
loadbin .\bin\fw_scpu.bin,0x00030000
loadbin .\bin\fw_loader.bin,0x00041000
loadbin .\bin\fw_ncpu.bin,0x00068000
  1. Execute prog_fw_loader_flash-boot.bat and wait until all progresses are finished (chip erase, program, verify)