Flash Management

1. Board Overview

Board 96-A
Board 96-B

2. Hardware Setting

2.1. Connecting UART0 (Program Flash via UART0 Interface)

UART0: Command Port (either CN10 or J8)

Board 96-A
Board 96-B-9x9 / 96-B-11x11

2.2. Connecting JTAG (Program Flash via JTAG/SWD Interface)

2.3. Connecting USB3.0 for 5V power supply

2.4. Bootstrap Settings

Board 96-A

bootstrap	graphical
00: UART
01: NOR FLASH
10: NAND FLASH
11: USB

Board 96-B-9x9

bootstrap	graphical
00: UART
01: NOR FLASH
10: NAND FLASH
11: USB

Board 96-B-11x11

bootstrap	graphical
00: UART
01: NOR FLASH
10: NAND FLASH
11: USB

3. Program Flash via UART0 Interface

3.1. Flash programmer necessaries

set bootstrap as "UART"
Open command terminal for flash programmer execution Tool path: kl720_sdk\firmware\utils\flash_programmer\nand\flash_programmer.py
install Necessary python modules: kl720_sdk\firmware\utils\requirements.txt
Limitations: Only the listed argument combinations below are allowed.

3.2. Edit python verification setting

Check UART port number from device manager
Edit setup.py, search “COM_ID” and modify the ID to match your UART port number

EX: COM_ID = 6 # COM6

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. Binary placing offset for KL720 flash should align with 128KB (NAND) / 4KB (NOR)

Command

$ python3 bin_gen.py <options>

    options argument:

    -h, --help      Show this help message and exit
    -p, --CPU_ONLY  FW only without model
    -f FLASH_SIZE, --flash_size FLASH_SIZE
                        target board flash size in MB
    -r, --nor       nor type flash

Output flash_image.bin

Note

Component, nef_utility, is used by bin_gen. If in Linux, must chmod +x ../nef_utility/nef_utility_linux first
The following bin files are must

flash_bin
├── boot_spl.bin      // bool spl bin file (for NAND flash)
├── boot_sp_nor.bin   // bool spl bin file (for NOR flash)
├── fw_ncpu.bin       // SCPU FW bin file (generated by Keil)
├── fw_scpu.bin       // NCPU FW bin file (generated by Keil)
├── models_720.nef    // model information(or copied from kenron_plus/res/models/KL720)

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!!”

Board 96-A
Board 96-B

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 0x00040000 -p fw_scpu.bin

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

3.8 Program to Nor flash

The above 3.4 ~ 3.7 are used for nand flash by default. If the project design uses nor flash, please add the '-r' parameter.

$ python flash_programmer.py -r -a flash_image.bin
$ python flash_programmer.py -r -v flash_image.bin
$ python flash_programmer.py -r -e
$ python flash_programmer.py -r -i 0x00040000 -p fw_scpu.bin

4. Program Flash via JTAG/SWD Interface

4.1. Jlink programmer necessaries

Connect JTAG/SWD and USB3.0 for 5V power.

4.2. Edit flash_prog.jlink device setting

Check your flash type: Winbond SPI Nand flash
Select a specific device based on flash manufacturer EX: device KL720-WB-NAND //Winbond Nand flash
Copy the bin file to kl720_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. Check programming result

Please ensure all the results are "O.K.", and enter "qc" to quit and close J-Link commander