Machine Gun Kelly - Till I Die [RECENT ✭]

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 track pays homage to Cleveland’s hip-hop pioneers, specifically Bone Thugs-N-Harmony , whose style and "East 1999" era heavily influence the song's energy and flow. II. Visual and Cultural Impact

: Lyrics like "Bitch, I needed paper" reflect his early financial hardships and the drive to escape poverty.

The music video, directed by Casey McPerry , further solidified the song's status as a local anthem by filming in gritty, authentic Cleveland locations.

: Despite receiving limited national airplay initially, the song gained massive regional support and was certified Platinum by the RIAA, moving over a million units.

: MGK repeatedly references his roots in "The Land" (Cleveland), specifically naming local landmarks and neighborhoods like East 123rd and Lenacrave Avenue.

: MGK famously performed the song during a record-breaking hometown show at FirstEnergy Stadium , making a dramatic zip-line entrance from the top of the stadium to the stage.

Analysis of Machine Gun Kelly's "Till I Die" Released on January 6, 2015, serves as the lead single for Machine Gun Kelly’s (MGK) sophomore studio album, General Admission . Produced by the J.U.S.T.I.C.E. League , the track is widely regarded as a "perfect trap anthem" and a definitive tribute to the rapper's hometown of Cleveland, Ohio. I. Themes and Lyrical Content

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.