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|
//! TSC Peripheral Interface
//!
//! This module provides an interface for the Touch Sensing Controller (TSC) peripheral.
//! It supports both blocking and async modes of operation, as well as different TSC versions (v1, v2, v3).
//!
//! # Key Concepts
//!
//! - **Pin Groups**: TSC pins are organized into groups, each containing up to four IOs.
//! - **Pin Roles**: Each pin in a group can have a role: Channel, Sample, or Shield.
//! - **Acquisition Banks**: Used for efficient, repeated TSC acquisitions on specific sets of pins.
//!
//! # Example (stm32)
//!
//! ```rust
//! let device_config = embassy_stm32::Config::default();
//! let context = embassy_stm32::init(device_config);
//!
//! let config = tsc::Config {
//! ct_pulse_high_length: ChargeTransferPulseCycle::_4,
//! ct_pulse_low_length: ChargeTransferPulseCycle::_4,
//! spread_spectrum: false,
//! spread_spectrum_deviation: SSDeviation::new(2).unwrap(),
//! spread_spectrum_prescaler: false,
//! pulse_generator_prescaler: PGPrescalerDivider::_16,
//! max_count_value: MaxCount::_255,
//! io_default_mode: false,
//! synchro_pin_polarity: false,
//! acquisition_mode: false,
//! max_count_interrupt: false,
//! };
//!
//! let mut g2: PinGroupWithRoles<embassy_stm32::peripherals::TSC, G2> = PinGroupWithRoles::new();
//! g2.set_io1::<tsc_pin_roles::Sample>(context.PB4);
//! let sensor_pin = g2.set_io2::<tsc_pin_roles::Channel>(context.PB5);
//!
//! let pin_groups = PinGroups {
//! g2: Some(g2.pin_group),
//! ..Default::default()
//! };
//!
//! let mut touch_controller = tsc::Tsc::new_blocking(
//! context.TSC,
//! pin_groups,
//! config,
//! ).unwrap();
//!
//! let discharge_delay = 5; // ms
//!
//! loop {
//! touch_controller.set_active_channels_mask(sensor_pin.pin.into());
//! touch_controller.start();
//! touch_controller.poll_for_acquisition();
//! touch_controller.discharge_io(true);
//! Timer::after_millis(discharge_delay).await;
//!
//! match touch_controller.group_get_status(sensor_pin.pin.group()) {
//! GroupStatus::Complete => {
//! let group_val = touch_controller.group_get_value(sensor_pin.pin.group());
//! // Process the touch value
//! // ...
//! }
//! GroupStatus::Ongoing => {
//! // Handle ongoing acquisition
//! // ...
//! }
//! }
//! }
//! ```
//!
//! # Async Usage
//!
//! For async operation, use `Tsc::new_async` and `pend_for_acquisition` instead of polling.
#![macro_use]
/// Configuration structures and enums for the TSC peripheral.
pub mod config;
/// Definitions and implementations for TSC pin groups.
pub mod pin_groups;
/// Definitions and implementations for individual TSC I/O pins.
pub mod io_pin;
/// Structures and implementations for TSC acquisition banks.
pub mod acquisition_banks;
/// Core implementation of the TSC (Touch Sensing Controller) driver.
pub mod tsc;
/// Type definitions used throughout the TSC module.
pub mod types;
/// Error types and definitions for the TSC module.
pub mod errors;
use core::marker::PhantomData;
pub use acquisition_banks::*;
pub use config::*;
use embassy_hal_internal::PeripheralType;
use embassy_sync::waitqueue::AtomicWaker;
pub use errors::*;
pub use io_pin::*;
pub use pin_groups::*;
pub use tsc::*;
pub use types::*;
use crate::rcc::RccPeripheral;
use crate::{interrupt, peripherals};
#[cfg(tsc_v1)]
const TSC_NUM_GROUPS: usize = 6;
#[cfg(tsc_v2)]
const TSC_NUM_GROUPS: usize = 7;
#[cfg(tsc_v3)]
const TSC_NUM_GROUPS: usize = 8;
/// Error type defined for TSC
#[derive(Debug, Clone, Copy)]
#[cfg_attr(feature = "defmt", derive(defmt::Format))]
pub enum Error {
/// Test error for TSC
Test,
}
/// TSC interrupt handler.
pub struct InterruptHandler<T: Instance> {
_phantom: PhantomData<T>,
}
impl<T: Instance> interrupt::typelevel::Handler<T::Interrupt> for InterruptHandler<T> {
unsafe fn on_interrupt() {
T::regs().ier().write(|w| w.set_eoaie(false));
T::waker().wake();
}
}
pub(crate) trait SealedInstance {
fn regs() -> crate::pac::tsc::Tsc;
fn waker() -> &'static AtomicWaker;
}
/// TSC instance trait
#[allow(private_bounds)]
pub trait Instance: SealedInstance + PeripheralType + RccPeripheral {
/// Interrupt for this TSC instance
type Interrupt: interrupt::typelevel::Interrupt;
}
foreach_interrupt!(
($inst:ident, tsc, TSC, GLOBAL, $irq:ident) => {
impl Instance for peripherals::$inst {
type Interrupt = crate::interrupt::typelevel::$irq;
}
impl SealedInstance for peripherals::$inst {
fn regs() -> crate::pac::tsc::Tsc {
crate::pac::$inst
}
fn waker() -> &'static AtomicWaker {
static WAKER: AtomicWaker = AtomicWaker::new();
&WAKER
}
}
};
);
|
