Struct capsules_core::adc::AdcVirtualized

pub struct AdcVirtualized<'a> { /* private fields */ }

Multiplexed ADC syscall driver, used by applications and capsules. Virtualized, and can be use by multiple applications at the same time; requests are queued. Does not support continuous or high-speed sampling.

Implementations

impl<'a> AdcVirtualized<'a>

Functions to create, initialize, and interact with the virtualized ADC

pub fn new( drivers: &'a [&'a dyn AdcChannel<'a>], grant: Grant<AppSys, UpcallCount<1>, AllowRoCount<0>, AllowRwCount<0>> ) -> AdcVirtualized<'a>

Create a new Adc application interface.

• drivers - Virtual ADC drivers to provide application access to

Trait Implementations

impl<'a> Client for AdcVirtualized<'a>

fn sample_ready(&self, sample: u16)

Called when a sample is ready.

impl SyscallDriver for AdcVirtualized<'_>

Implementation of the syscalls for the virtualized ADC.

fn command( &self, command_num: usize, channel: usize, _: usize, processid: ProcessId ) -> CommandReturn

Method for the application to command or query this driver.

• command_num - which command call this is
• channel - requested channel value
• _ - value sent by the application, unused
• processid - application identifier

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.