They can be written only in privileged mode; if you’re using Linux, this means that you have to be in kernel space to write. Refer https://github.com/chunsj/nxctrl/blob/master/nxpmx/nxpmx.c which my approach or you can use PRU code.
They can be written only in privileged mode; if you’re using Linux, this means that you have to be in kernel space to write. Refer https://github.com/chunsj/nxctrl/blob/master/nxpmx/nxpmx.c which my approach or you can use PRU code.