psock_/file_ API is public API for kernel space component, not internal to > socket/file subsystem. >
I was referring to what Gregory Nutt said, which was " It would be best to use the internal OS socket interfaces directly" > SPI peripheral driver(e.g. sensor) should call SPI_SELECT to control the > chip select, it's the responsibility of SPI bus driver(spi_dev_s/spi_ops_s) > to do the real action: > 1.Control the SPI hardware register to change CS signal > 2.Or control the GPIO hardware register > The reference to SPI involves a number of implications from a previous discussion about the SPI subsystem: 1-Several peripherals in a bus, which force to use GPIOs as CSs 2-SPI bus drivers which work independent of peripheral drivers 3-SPI peripheral drivers which are _not_ limited to one peripheral and hardwired to one board 4-In such situation, the need to have a better, more general control for GPIOs than what ioexpander can offer without practically redoing it anyways That list pose a number of fundamental changes to several current systems, which is what I'm referring to > > > El sáb, 20 feb 2021 a las 12:30, Gregory Nutt (<spudan...@gmail.com>) > > escribió: > > > > > > > > > I suggested using file_open() and file_ioctl() in a previous email. > > > > That is wrong. file_ioctl() cannot be used to access > > > > socket_ioctls(). You would have to use psock_ioctl(). > > > > > > Because the socket interface goes though the network, there are some > > > hand shakes and interlocks to prevent network activity while accessing > > > the PHY interface. I think using a custom interface would be > > > problematic. It would be best to use the internal OS socket > > > interfaces directly. They prototyped and described in > include/nuttx/net/net.h. > > > For example, instead of using socket() you would use psock_socket(), > > > instead of using bind(), you would use psock_bind(), instead of using > > > ioctl(), you would use psock_ioctl(). > > > > > > The APIs are the same as the user space APIs exception that: (1) the > > > are prefaced with psock_ and (2) the do not use an int socket > > > descriptor. Rather, they use a pointer to the internal socket > > > structure struct socket * > > > > > > > > > > > > > >
