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Kevin Thomas
2026-03-19 15:01:07 -04:00
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WEEK11/WEEK11-04.md
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## Week 11
Structures and Functions in Embedded Systems: Debugging and Hacking w/ IR Remote Control and NEC Protocol Basics
### Exercise 4: Change Blink Speed
### Non-Credit Practice Exercise 4: Change Blink Speed
#### Objective
Find the `blink_led(pin, 3, 50)` call in the `0x0026_functions` binary using GDB, identify the immediate value `0x32` (50) being loaded into `r2` (the delay parameter), calculate the file offset, and patch it to `0x19` (25) so that each LED blinks at double speed when activated by the IR remote.