3d2cd477b2
Add EEPROM boot firmware (exp 0xDB) and supporting tools
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Firmware: Rewrite skywalker1.c for EEPROM boot experiment — tests
whether I2C hardware controller works after FX2 boot ROM completes
EEPROM load (bypassing the CPUCS restart that triggers BERR).
Tools:
- fw_load.py: Add I2C cleanup stub, pre-halt register flush, improved
error handling and segment loading
- eeprom_write.py: Add IHX→C2 EEPROM image converter (16KB format
with length-prefixed segments, checksum)
- eeprom_dump.py: Refactor for cleaner output, better hex display
- skywalker_lib.py: Minor I2C register constant updates
Docs:
- EEPROM-RECOVERY.md: Four recovery options for soft-bricked device
(SOIC clip, SDA pull-up, desolder, wait-for-timeout)
- Master reference: Updated with EEPROM boot findings
Status: EEPROM flash blocked — stock firmware I2C proxy returns pipe
errors, host-side 0xA0 writes proven unable to drive peripheral bus.
Device boot ROM intermittently hangs on EEPROM I2C read (~3-6% success).
2026-02-20 10:56:21 -07:00
c7b5932cc0
Add EEPROM flash tool, TS analyzer, DVB-S2 investigation, and tune.py bugfix
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New tools:
- tools/eeprom_write.py: EEPROM firmware flash with backup, verify, dry-run
- tools/ts_analyze.py: MPEG-2 transport stream analyzer with PAT/PMT parsing
DVB-S2 investigation confirms BCM4500 hardware limitation (no LDPC/BCH silicon).
Fix --json flag on tune.py subcommands (argparse parent/child scoping).
All tools verified against live SkyWalker-1 hardware.
2026-02-11 14:46:20 -07:00
