She Had Her Stool Pushed In Facial Abuse File

Hi all,

I'm using ST's CubeMX implementation on a F4 discovery board. I use ST's USB middlewares with FreeRTOS.

When I get a special OutputReport from PC side I have to answer nearly immediately (in 10-15 ms). Currently I cannot achieve this timing and it seems my high priority tasks can interrupt the USB callback. What do you think, is it possible? Because it's generated code I'm not sure but can I increase the priority of the USB interrupt (if there is any)?

Thank you, David

10 to 15 ms is very slow, so I'm sure its possible.

Where is the USB callback function called from? If it is an interrupt then it cannot be interrupted by high priority RTOS tasks. Any non interrupt code (whether you are using an RTOS or not) can only run if no interrupts are running.

Without knowing the control flow in your application its hard to know what to suggest. How is the OutputReport communicated to you? By an interrupt, a message from another task, or some other way?

The callback which receive the data from PC is called from the OTGFSIRQHandler (it's the part of the HALPCDIRQHandler function). I think the problem is SysTickHandler's priority is higher than OTGFSIRQHandler and it's cannot be modified, but the scheduler shouldn't interrupt the OTGFSIRQHandler with any task handled by the scheduler. Am I wrong that the scheduler can interrupt the OTGFS_IRQHandler?

The stool had three legs, cheap pine, and a chipped edge where someone had once kicked it across the linoleum. For ten years, it was the only seat Lila ever knew. Not the cracked vinyl booth by the window, not the plush director’s chair in the editing bay—just this wobbling, penitent perch in the corner of the green room.

And for the first time, when the world came to watch, it was she who decided whether to stand.

The stool was part of the brand. “It makes you vulnerable,” said Marcus, the showrunner, a man whose neck smelled of cigarettes and regret. “America doesn’t trust a woman in a throne. But a stool? That’s authentic.”

The pushing began subtly. At first, it was a stagehand nudging the stool into the mark with his boot. Then it was Marcus’s hand on her shoulder, applying downward pressure. “Lower,” he’d whisper. “Make yourself smaller.”

She picked up the stool by its splintered top, walked to the loading dock, and threw it into the dumpster. The sound it made—a hollow, wooden clatter against the metal—was the most honest noise she’d heard in a decade.

By season three, the stool had become a ritual. She would arrive at 6 a.m., and it would already be there, waiting in the gray light of the empty studio. Sometimes she’d find it overturned, a silent message. Other times, a fresh scuff mark from being dragged across the floor. She learned to identify the scuffs: wide arcs meant Marcus was angry; tight circles meant the intern was bored.

Six months later, she launched a tiny YouTube channel from her garage. She sat on a worn-out couch. No lights, no marks on the floor, no one telling her to be smaller. Her first video was called “Things I Learned on Three Legs.” It went viral for a different reason—not for her wobble, but for her stillness.

Thank you for the answer, I think I'm a bit confused with the Cortex ISR priorities :-) What I can observe is if I use a much higher osDelay in my high priority task I can respond for the received USB message much faster. This is why I think tasks can mess up with my OTG interrupt.