2 Commits

Author	SHA1	Message	Date
Ryan Malloy	3d2cd477b2	Add EEPROM boot firmware (exp 0xDB) and supporting tools ... 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
Ryan Malloy	5710584267	Add custom FX2 firmware and RAM loader for open-source development ... Custom firmware (SDCC + fx2lib) implements all stock vendor commands (0x80-0x94) plus new commands for spectrum sweep (0xB0), raw BCM4500 register access (0xB1/0xB2), and blind scan (0xB3). Compiles to 6.3KB of code with healthy RAM margins. RAM loader (fw_load.py) uses the FX2 0xA0 vendor request to load firmware into RAM without touching EEPROM -- power cycle restores factory firmware. Supports Intel HEX and raw binary formats.	2026-02-11 19:46:50 -07:00