Solved
NUCLEO‑H755ZI TIM8 PWM: Channels 1–2 OK, Channels 3–4 Stuck at 0 V
- July 22, 2025
- 2 replies
- 276 views
Hello,
I’m trying to drive LEDs using all four PWM channels of TIM8 on a NUCLEO‑H755ZI, but I’m running into this issue:
CH1 (PC6) and CH2 (PC7): When I measure with a multimeter, I see the expected voltage fluctuations/average corresponding to the configured frequency and duty cycle.
CH3 (PC8) and CH4 (PC9): I’ve removed the LEDs and measure the pins directly with a multimeter; they always read 0 V.
I’m attaching the project archive, which includes the CubeMX .ioc file, tim.c , gpio.c , the driver layer, and all HAL settings. I’d appreciate any suggestions or insights you might have. Thanks in advance!
