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Kevin Thomas
2026-03-19 15:01:07 -04:00
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WEEK10/WEEK10-04.md
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## Week 10
Conditionals in Embedded Systems: Debugging and Hacking Static & Dynamic Conditionals w/ SG90 Servo Motor PWM Basics
### Exercise 4: Speed Profile
### Non-Credit Practice Exercise 4: Speed Profile
#### Objective
Find both `sleep_ms(500)` calls in the `0x0020_dynamic-conditionals` binary using GDB, identify the literal pool values `0x1f4` (500) loaded into `r0` before each `bl sleep_ms`, calculate the file offsets, and patch case '1' to use `0x64` (100ms) for fast movement and case '2' to use `0x3e8` (1000ms) for slow movement, then verify on hardware that the two keys produce visibly different servo speeds.