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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?
Would you like me to make any specific changes or additions?
In his commentary, Swami Chinmayananda provides a detailed analysis of the text, exploring the historical context, philosophical concepts, and spiritual practices described in the Ashtavakra Gita. He also provides practical guidance on how to apply the teachings of the text to everyday life.
Please let me know if there's anything else I can help you with!
The Ashtavakra Gita is a profound spiritual text that offers insights into the nature of reality and the path to self-realization. Swami Chinmayananda's commentary on the text provides a detailed and authoritative interpretation of the Ashtavakra Gita, emphasizing the importance of self-inquiry, detachment, and awareness.
The Ashtavakra Gita is a profound spiritual text that is considered one of the most important works of Advaita Vedanta, a non-dualistic school of Hindu philosophy. The text is a dialogue between the sage Ashtavakra and King Janaka, in which Ashtavakra shares his insights into the nature of reality and the path to self-realization. Swami Chinmayananda, a renowned Indian spiritual teacher, has written a commentary on the Ashtavakra Gita, which has been widely acclaimed for its clarity and depth. This essay will explore the key themes and concepts of the Ashtavakra Gita, as well as Swami Chinmayananda's interpretation of the text.
Swami Chinmayananda's interpretation of the Ashtavakra Gita emphasizes the importance of self-inquiry (atma-vichara) and introspection. He argues that the seeker must investigate the nature of the self and reality through a process of questioning and reflection.
One of the key themes of the Ashtavakra Gita is the concept of non-duality (advaita). Ashtavakra argues that the distinction between the individual self and the ultimate reality is a product of ignorance (avidya). He claims that the individual self is not a separate entity, but is merely a manifestation of the ultimate reality.
Third, one must cultivate a sense of awareness and mindfulness. This involves developing a greater awareness of one's thoughts, feelings, and actions, and learning to see them as manifestations of the ultimate reality.
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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