acassis commented on issue #16373: URL: https://github.com/apache/nuttx/issues/16373#issuecomment-2888407051
Hi @dakejahl it is not directly possible to install a callback from user space for SPI DMA completion due the userspace/kernel space separation (in FLAT mode it could work, but it will neither work in PROTECT mode or KERNEL mode). Maybe you can modify your spi driver to create a notification event when DMA TX is complete in your chip and use some mechanism such as signal, poll, message queue, etc to notify your application. Other option is create a character driver that subscribe to DMA TX complete IRQ and do this notification, this way we avoid modifying the existing driver, but there are some complications since the IRQ is already handled in the spi driver. If you want to use signal, you can see the driver nuttx/drivers/sensors/zerocross.c when I used it and the apps/examples/zerocross application example. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: commits-unsubscr...@nuttx.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
