Struct capsules_extra::pca9544a::PCA9544A

pub struct PCA9544A<'a, I: I2CDevice> { /* private fields */ }

Implementations

impl<'a, I: I2CDevice> PCA9544A<'a, I>

pub fn new( i2c: &'a I, buffer: &'static mut [u8], grant: Grant<App, UpcallCount<{ upcall::COUNT }>, AllowRoCount<0>, AllowRwCount<0>>, ) -> Self

Trait Implementations

impl<I: I2CDevice> I2CClient for PCA9544A<'_, I>

fn command_complete( &self, buffer: &'static mut [u8], _status: Result<(), Error>, )

Called when an I2C command completed. The error denotes whether the command completed successfully or if an error occured.

impl<I: I2CDevice> SyscallDriver for PCA9544A<'_, I>

fn command( &self, command_num: usize, data: usize, _: usize, process_id: ProcessId, ) -> CommandReturn

Control the I2C selector.

command_num

• 0: Driver existence check.
• 1: Choose which channels are active.
• 2: Disable all channels.
• 3: Read the list of fired interrupts.
• 4: Read which channels are selected.

fn allocate_grant(&self, processid: ProcessId) -> Result<(), Error>

Request to allocate a capsule’s grant for a specific process.

fn allow_userspace_readable( &self, app: ProcessId, which: usize, slice: ReadWriteProcessBuffer, ) -> Result<ReadWriteProcessBuffer, (ReadWriteProcessBuffer, ErrorCode)>

System call for a process to pass a buffer (a UserspaceReadableProcessBuffer) to the kernel that the kernel can either read or write. The kernel calls this method only after it checks that the entire buffer is within memory the process can both read and write.