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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?
For decades, transgender people were often pushed to the edges of gay bars and activist groups—tolerated but not fully embraced. Yet, when the AIDS crisis hit, it was often trans sex workers and drag mothers who nursed the sick when hospitals turned them away. The alliance isn’t theoretical; it’s earned. In the current political climate, we are seeing a strategy of division. Anti-LGBTQ legislation is increasingly targeting trans youth (bans on sports, healthcare, bathrooms). The argument is: “We tolerate gay people, but these trans people are going too far.”
There’s a common question that pops up in online spaces: “Why is the ‘T’ in LGBTQ? Isn’t that about sexuality, not identity?”
On the surface, that seems logical. But to separate the transgender community from LGBTQ culture is to misunderstand both history and human rights.
Here is the reality: The Historical Cement Before Stonewall, there were trans activists like Marsha P. Johnson and Sylvia Rivera. While mainstream gay organizations of the 1960s urged members to dress “respectably” (i.e., not trans or gender non-conforming), it was the trans women, drag queens, and gender outlaws who threw the bricks and led the riots. They were the front line.
But those are family arguments . They happen at the dinner table, not by kicking someone out of the house.
When the trans community is attacked—denied healthcare, banned from shelters, erased from history—the entire LGBTQ community loses its spine. Without the “T,” the movement becomes a respectability politics club for cisgender, white, monogamous gay people. And that club would have never won the right to marry.
Beyond the Acronym: Understanding the Trans Community’s Core Role in LGBTQ Culture
If you support the right to love who you love, you must support the right to be who you are. The “T” isn't an add-on. It’s the engine.
Let’s keep the discussion civil. What are your thoughts on the history or the current legal strategy?
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.
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