SpaceWire BL1 (Boot Loader level 1)

bl1 spacewire packets generation.

Validate the configuration file

sudo apt install nodejs
npm install pajv
node_modules/.bin/pajv -s configs/<script_name>.schema.json -d configs/<script_name>.yml

Using ngultra_bl1_programmer.py

The script is used to generate the spacewire packets used by the BL1 to load one and only one bitstream and one or more applications.

Loading one bitstream and one application

bl1_spw.yml:

bitstream:
    type: bsm
    path: ./switch_blink_v2.nxb
    transfer_addr: 0x3100000
    item_id: 0xcafecafe
application_software:
    asw:
        type: asw
        launched: True
        path: ./test_led.bin
        load_addr: 0x3000000
        start_addr: 0x3000000
        item_id: 0x12345678
        param1: 0x11111111
        param2: 0x22222222
        param3: 0x33333333

Loading one bitstream and several applications

bl1_spw_multi_asw.yml:

bitstream:
    type: bsm
    path: ./switch_blink_v2.nxb
    transfer_addr: 0x3100000
    item_id: 0xcafecafe
application_software:
    xcf:
        type: asw
        path: ./xng/xre-examples/hello_world/hello_world.xcf.aarch32-pmsa-fv.bin
        load_addr: 0x80100000
        start_addr: 0x80100000
        item_id: 0x22222222
        param1: 0x0
        param2: 0x0
        param3: 0x0
    xre:
        type: asw
        path: ./xng/xre-examples/hello_world/hello_world.aarch32-pmsa-fv.bin
        load_addr: 0x80180000
        start_addr: 0x80180000
        item_id: 0x33333333
        param1: 0x0
        param2: 0x0
        param3: 0x0
    xng:
        type: asw
        launched: True
        path: ./xng/lib/xng.aarch32-pmsa-fv.bin
        load_addr: 0x80000000
        start_addr: 0x80000000
        item_id: 0x11111111
        param1: 0x80100000
        param2: 0x0
        param3: 0x0

Note:

Only one application among those copied can be launched by BL1.
To indicate the application to be launched by BL1, the property launched must be set to True.
The launched application must be the last in the configuration file. All application after the one with the property launched set to true will be ignored.

Command:

ngultra_bl1_programmer.py -s -c <configuration_file>

“-s” option specify to generate spacewire packets.
“-o” option could be used to specify another directory where to copy the generated packets.

The default directory is /tmp/bl1_spacewire_packets. Note: An absolute path must be provided.
“-v” option increase the verbosity, useful to debug.

Note:

A file named packets.list containing all the generated packets is created in the same directory as the packets.

A complete documentation of the configuration file may be found at bl1_spw.schema.json

Once BL1 spacewire packets has been generated, they can be sent to the Ng-Ultra board via the spacewire link.