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use crate::{FtInner, PinUse};
use libftd2xx::{FtdiCommon, MpsseCmdBuilder, TimeoutError};
use std::{cell::RefCell, sync::Mutex};
#[derive(Debug)]
pub struct OutputPin<'a, Device: FtdiCommon> {
mtx: &'a Mutex<RefCell<FtInner<Device>>>,
idx: u8,
}
impl<'a, Device: FtdiCommon> OutputPin<'a, Device> {
pub(crate) fn new(mtx: &'a Mutex<RefCell<FtInner<Device>>>, idx: u8) -> OutputPin<'a, Device> {
let lock = mtx.lock().expect("Failed to aquire FTDI mutex");
let mut inner = lock.borrow_mut();
inner.allocate_pin(idx, PinUse::Output);
OutputPin { mtx, idx }
}
pub(crate) fn set(&self, state: bool) -> Result<(), TimeoutError> {
let lock = self.mtx.lock().expect("Failed to aquire FTDI mutex");
let mut inner = lock.borrow_mut();
if state {
inner.value |= self.mask();
} else {
inner.value &= !self.mask();
};
let cmd: MpsseCmdBuilder = MpsseCmdBuilder::new()
.set_gpio_lower(inner.value, inner.direction)
.send_immediate();
inner.ft.write_all(cmd.as_slice())
}
}
impl<'a, Device: FtdiCommon> OutputPin<'a, Device> {
pub(crate) fn mask(&self) -> u8 {
1 << self.idx
}
}
impl<'a, Device: FtdiCommon> embedded_hal::digital::v2::OutputPin for OutputPin<'a, Device> {
type Error = TimeoutError;
fn set_low(&mut self) -> Result<(), Self::Error> {
self.set(false)
}
fn set_high(&mut self) -> Result<(), Self::Error> {
self.set(true)
}
}