use embedded_hal::blocking::delay::DelayMs;
use embedded_hal::blocking::spi::{Transfer, Write};
use embedded_hal::digital::v2::{InputPin, OutputPin};
use crate::{Busy, Error, PinState, Ready, Reset, Transaction, Transactional};
#[derive(Debug, Clone, PartialEq)]
pub struct Wrapper<Spi, SpiError, CsPin, BusyPin, ReadyPin, ResetPin, PinError, Delay> {
spi: Spi,
cs: CsPin,
delay: Delay,
busy: BusyPin,
ready: ReadyPin,
reset: ResetPin,
pub(crate) err: Option<Error<SpiError, PinError>>,
}
impl<Spi, SpiError, CsPin, BusyPin, ReadyPin, ResetPin, PinError, Delay>
Wrapper<Spi, SpiError, CsPin, BusyPin, ReadyPin, ResetPin, PinError, Delay>
where
Spi: Transfer<u8, Error = SpiError> + Write<u8, Error = SpiError>,
CsPin: OutputPin<Error = PinError>,
Delay: DelayMs<u32>,
{
pub fn new(
spi: Spi,
cs: CsPin,
busy: BusyPin,
ready: ReadyPin,
reset: ResetPin,
delay: Delay,
) -> Self {
Self {
spi,
cs,
delay,
busy,
ready,
reset,
err: None,
}
}
pub fn pin_write<P>(&mut self, pin: &mut P, value: bool) -> i32
where
P: OutputPin<Error = PinError>,
{
let r = match value {
true => pin.set_high(),
false => pin.set_low(),
};
match r {
Ok(_) => 0,
Err(e) => {
self.err = Some(Error::Pin(e));
-1
}
}
}
pub fn pin_read<P>(&mut self, pin: &mut P) -> i32
where
P: InputPin<Error = PinError>,
{
let r = pin.is_high();
match r {
Ok(true) => 1,
Ok(false) => 0,
Err(e) => {
self.err = Some(Error::Pin(e));
-1
}
}
}
pub fn check_error(&mut self) -> Result<(), Error<SpiError, PinError>> {
match self.err.take() {
Some(e) => Err(e),
None => Ok(()),
}
}
pub fn free(self) -> (Spi, CsPin, BusyPin, ReadyPin, ResetPin) {
(self.spi, self.cs, self.busy, self.ready, self.reset)
}
}
impl<Spi, SpiError, CsPin, BusyPin, ReadyPin, ResetPin, PinError, Delay> Transactional
for Wrapper<Spi, SpiError, CsPin, BusyPin, ReadyPin, ResetPin, PinError, Delay>
where
Spi: Transfer<u8, Error = SpiError> + Write<u8, Error = SpiError>,
CsPin: OutputPin<Error = PinError>,
Delay: DelayMs<u32>,
{
type Error = Error<SpiError, PinError>;
fn spi_read<'a>(&mut self, prefix: &[u8], mut data: &'a mut [u8]) -> Result<(), Self::Error> {
self.cs.set_low().map_err(|e| Error::Pin(e))?;
let mut res = self.spi.write(&prefix);
if res.is_ok() {
res = self.spi.transfer(&mut data).map(|_r| ());
}
self.cs.set_high().map_err(|e| Error::Pin(e))?;
trace!("[spi_read] prefix: {:x?} received: {:x?}", prefix, data);
match res {
Err(e) => Err(Error::Spi(e)),
Ok(_) => Ok(()),
}
}
fn spi_write(&mut self, prefix: &[u8], data: &[u8]) -> Result<(), Self::Error> {
self.cs.set_low().map_err(|e| Error::Pin(e))?;
trace!("[spi_write] prefix: {:x?} writing: {:x?}", prefix, data);
let mut res = self.spi.write(&prefix);
if res.is_ok() {
res = self.spi.write(&data);
}
self.cs.set_high().map_err(|e| Error::Pin(e))?;
match res {
Err(e) => Err(Error::Spi(e)),
Ok(_) => Ok(()),
}
}
fn spi_exec(&mut self, transactions: &mut [Transaction]) -> Result<(), Self::Error> {
let mut res = Ok(());
self.cs.set_low().map_err(|e| Error::Pin(e))?;
for i in 0..transactions.len() {
let mut t = &mut transactions[i];
res = match &mut t {
Transaction::Write(d) => self.spi.write(d),
Transaction::Read(d) => self.spi.transfer(d).map(|_r| ()),
}
.map_err(|e| Error::Spi(e));
if res.is_err() {
break;
}
}
self.cs.set_low().map_err(|e| Error::Pin(e))?;
res
}
}
impl<Spi, SpiError, CsPin, BusyPin, ReadyPin, ResetPin, PinError, Delay> Busy
for Wrapper<Spi, SpiError, CsPin, BusyPin, ReadyPin, ResetPin, PinError, Delay>
where
BusyPin: InputPin<Error = PinError>,
{
type Error = Error<SpiError, PinError>;
fn get_busy(&mut self) -> Result<PinState, Self::Error> {
let v = self.busy.is_high().map_err(|e| Error::Pin(e))?;
match v {
true => Ok(PinState::High),
false => Ok(PinState::Low),
}
}
}
impl<Spi, SpiError, CsPin, BusyPin, ReadyPin, ResetPin, PinError, Delay> Ready
for Wrapper<Spi, SpiError, CsPin, BusyPin, ReadyPin, ResetPin, PinError, Delay>
where
ReadyPin: InputPin<Error = PinError>,
{
type Error = Error<SpiError, PinError>;
fn get_ready(&mut self) -> Result<PinState, Self::Error> {
let v = self.ready.is_high().map_err(|e| Error::Pin(e))?;
match v {
true => Ok(PinState::High),
false => Ok(PinState::Low),
}
}
}
impl<Spi, SpiError, CsPin, BusyPin, ReadyPin, ResetPin, PinError, Delay> Reset
for Wrapper<Spi, SpiError, CsPin, BusyPin, ReadyPin, ResetPin, PinError, Delay>
where
ResetPin: OutputPin<Error = PinError>,
{
type Error = Error<SpiError, PinError>;
fn set_reset(&mut self, state: PinState) -> Result<(), Self::Error> {
match state {
PinState::High => self.reset.set_high().map_err(|e| Error::Pin(e)),
PinState::Low => self.reset.set_low().map_err(|e| Error::Pin(e)),
}
}
}
impl<Spi, SpiError, CsPin, BusyPin, ReadyPin, ResetPin, PinError, Delay> DelayMs<u32>
for Wrapper<Spi, SpiError, CsPin, BusyPin, ReadyPin, ResetPin, PinError, Delay>
where
Delay: DelayMs<u32>,
{
fn delay_ms(&mut self, ms: u32) {
self.delay.delay_ms(ms);
}
}
impl<Spi, SpiError, CsPin, BusyPin, ReadyPin, ResetPin, PinError, Delay> Transfer<u8>
for Wrapper<Spi, SpiError, CsPin, BusyPin, ReadyPin, ResetPin, PinError, Delay>
where
Spi: Transfer<u8, Error = SpiError> + Write<u8, Error = SpiError>,
{
type Error = SpiError;
fn transfer<'w>(&mut self, data: &'w mut [u8]) -> Result<&'w [u8], Self::Error> {
trace!("[spi::Transfer] writing: {:x?}", &data);
Transfer::transfer(&mut self.spi, data).map(|r| {
trace!("[spi::Transfer] read: {:x?}", &r);
r
})
}
}
impl<Spi, SpiError, CsPin, BusyPin, ReadyPin, ResetPin, PinError, Delay> Write<u8>
for Wrapper<Spi, SpiError, CsPin, BusyPin, ReadyPin, ResetPin, PinError, Delay>
where
Spi: Transfer<u8, Error = SpiError> + Write<u8, Error = SpiError>,
{
type Error = SpiError;
fn write<'w>(&mut self, data: &[u8]) -> Result<(), Self::Error> {
trace!("[spi::Write] writing: {:x?}", &data);
Write::write(&mut self.spi, data)
}
}