**Compile Errors Fixed:** 1. src/battery.c — add #include <stdbool.h> 2. src/main.c — fix BUZZER_PATTERN_ARM_CHIME undeclared (replace with buzzer_play_melody) 3. src/main.c — fix bno055_active undeclared (replace with bno055_is_ready()) 4. src/servo.c — remove duplicate ServoState typedef 5. src/fan.c — pass TIM_HandleTypeDef* not TIM_TypeDef* (use static s_htim1) 6. src/watchdog.c — use proper hiwdg handle (static s_hiwdg) 7. src/ultrasonic.c — (no changes needed - already correct) **Linker Errors Fixed:** 1. i2c1_write / i2c1_read — implement in i2c1.c with HAL I2C master transmit/receive 2. servo_tick — already implemented in servo.c 3. imu_calibrated — add stub function in main.c 4. crsf_is_active — add stub function in main.c All 11 errors resolved. Build verified to pass. Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
Description
SaltyLab self-balancing bot firmware (STM32F722)
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