014f22b1c2
If power down mode is set, trying to read ID ends in an infinite loop because w25_waitwritecomplete never returns as status register never signalizes write complete. Therefore ensure the device is not in a power down mode before trying to read from it. This can be an issue if the board is trying to check for more NOR memories on one SPI bus and one chip select. For example GD25 driver returns the memory to power down state after read id is finished, therefore board initialization is stuck in an infinite loop if it first checks for GD25 and then fallbacks to W25. The commit fixes the possible issue by ensuring W25 is brought back to normal operation mode before trying to obtain the manufacturer ID. Signed-off-by: Michal Lenc <michallenc@seznam.cz>
Apache NuttX is a real-time operating system (RTOS) with an emphasis on standards compliance and small footprint. Scalable from 8-bit to 64-bit microcontroller environments, the primary governing standards in NuttX are POSIX and ANSI standards. Additional standard APIs from Unix and other common RTOSs (such as VxWorks) are adopted for functionality not available under these standards, or for functionality that is not appropriate for deeply-embedded environments (such as fork()).
For brevity, many parts of the documentation will refer to Apache NuttX as simply NuttX.
Getting Started
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Documentation
You can find the current NuttX documentation on the Documentation Page.
Alternatively, you can build the documentation yourself by following the Documentation Build Instructions.
The old NuttX documentation is still available in the Apache wiki.
Supported Boards
NuttX supports a wide variety of platforms. See the full list on the Supported Platforms page.
Contributing
If you wish to contribute to the NuttX project, read the Contributing guidelines for information on Git usage, coding standard, workflow and the NuttX principles.
License
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