forked from M-Labs/humpback-dds
spi mux: remove traits
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parent
f77013c290
commit
e834e6fcea
71
src/cpld.rs
71
src/cpld.rs
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@ -23,12 +23,7 @@ pub struct CPLD<SPI, CS0, CS1, CS2, GPIO> {
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pub(crate) data: cell::RefCell<CPLDData<SPI, CS0, CS1, CS2, GPIO>>,
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}
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pub trait SelectChip {
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type Error;
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fn select_chip(&mut self, chip: u8) -> Result<(), Self::Error>;
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}
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impl<SPI, CS0, CS1, CS2, GPIO, E> SelectChip for CPLDData<SPI, CS0, CS1, CS2, GPIO>
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impl<SPI, CS0, CS1, CS2, GPIO, E> CPLDData<SPI, CS0, CS1, CS2, GPIO>
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where
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SPI: Transfer<u8, Error = E>,
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CS0: OutputPin,
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@ -36,8 +31,7 @@ where
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CS2: OutputPin,
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GPIO: OutputPin,
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{
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type Error = Error<E>;
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fn select_chip(&mut self, chip: u8) -> Result<(), Self::Error> {
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pub(crate) fn select_chip(&mut self, chip: u8) -> Result<(), Error<E>> {
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match chip & (1 << 0) {
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0 => self.chip_select.0.set_low(),
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_ => self.chip_select.0.set_high(),
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@ -52,49 +46,13 @@ where
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}.map_err(|_| Error::CSError)?;
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Ok(())
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}
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}
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pub trait IssueIOUpdate {
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type Error;
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fn issue_io_update(&mut self) -> Result<(), Self::Error>;
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}
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impl<SPI, CS0, CS1, CS2, GPIO, E> IssueIOUpdate for CPLDData<SPI, CS0, CS1, CS2, GPIO>
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where
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SPI: Transfer<u8>,
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CS0: OutputPin,
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CS1: OutputPin,
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CS2: OutputPin,
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GPIO: OutputPin<Error = E>,
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{
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type Error = Error<E>;
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fn issue_io_update(&mut self) -> Result<(), Self::Error> {
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pub(crate) fn issue_io_update(&mut self) -> Result<(), Error<E>> {
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self.io_update.set_high().map_err(|_| Error::IOUpdateError)?;
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self.io_update.set_low().map_err(|_| Error::IOUpdateError)
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}
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}
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pub trait DoOnGetRefMutData<SPI, CS0, CS1, CS2, GPIO> {
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fn do_on_get_ref_mut_data<R, E>(
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&self,
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f: impl FnOnce(cell::RefMut<CPLDData<SPI, CS0, CS1, CS2, GPIO>>) -> Result<R, Error<E>>,
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) -> Result<R, Error<E>>;
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}
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impl<SPI, CS0, CS1, CS2, GPIO> DoOnGetRefMutData<SPI, CS0, CS1, CS2, GPIO> for CPLD<SPI, CS0, CS1, CS2, GPIO> {
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fn do_on_get_ref_mut_data<R, E>(
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&self,
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f: impl FnOnce(cell::RefMut<CPLDData<SPI, CS0, CS1, CS2, GPIO>>) -> Result<R, Error<E>>,
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) -> Result<R, Error<E>> {
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let dev = self
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.data
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.try_borrow_mut()
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.map_err(|_| Error::GetRefMutDataError)?;
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f(dev)
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}
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}
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impl<SPI, CS0, CS1, CS2, GPIO, E> Transfer<u8> for CPLD<SPI, CS0, CS1, CS2, GPIO>
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where
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SPI: Transfer<u8, Error = E>,
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@ -106,7 +64,7 @@ where
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type Error = Error<E>;
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fn transfer<'w>(&mut self, words: &'w mut [u8]) -> Result<&'w [u8], Self::Error> {
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self.do_on_get_ref_mut_data(move |mut dev| dev.spi.transfer(words).map_err(Error::SPI))
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self.data.try_borrow_mut().map_err(|_| Error::GetRefMutDataError)?.spi.transfer(words).map_err(Error::SPI)
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}
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}
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@ -140,26 +98,7 @@ impl<SPI, CS0, CS1, CS2, GPIO, E> CPLD<SPI, CS0, CS1, CS2, GPIO> where
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}
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// Split SPI into chips, wrapped by Parts struct
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pub fn split<'a>(&'a self) -> Parts<'a, CPLD<SPI, CS0, CS1, CS2, GPIO>, SPI, CS0, CS1, CS2, GPIO> {
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pub fn split<'a>(&'a self) -> Parts<'a, SPI, CS0, CS1, CS2, GPIO> {
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Parts::new(&self)
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}
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// Select Chip
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pub fn select_chip(&mut self, channel: u8) -> Result<(), Error<E>> {
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self.do_on_get_ref_mut_data(|mut dev| dev.select_chip(channel))
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}
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}
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impl<SPI, CS0, CS1, CS2, GPIO, E> CPLD<SPI, CS0, CS1, CS2, GPIO>
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where
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SPI: Transfer<u8>,
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CS0: OutputPin,
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CS1: OutputPin,
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CS2: OutputPin,
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GPIO: OutputPin<Error = E>
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{
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// Issue I/O Update
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pub fn issue_io_update(&mut self) -> Result<(), Error<E>> {
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self.do_on_get_ref_mut_data(|mut dev| dev.issue_io_update())
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}
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}
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@ -4,60 +4,60 @@ use embedded_hal::{
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};
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use core::marker::PhantomData;
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use crate::cpld::{DoOnGetRefMutData, SelectChip, IssueIOUpdate};
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use crate::cpld::CPLD;
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use crate::Error;
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pub struct SPISlave<'a, DEV: 'a, SPI, CS0, CS1, CS2, GPIO> (
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&'a DEV,
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u8, // Channel of SPI slave
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bool, // Need I/O Update
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PhantomData<(SPI, CS0, CS1, CS2, GPIO)>,
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pub struct SPISlave<'a, SPI, CS0, CS1, CS2, GPIO> (
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// SPI device to be multiplexed
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&'a CPLD<SPI, CS0, CS1, CS2, GPIO>,
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// Channel of SPI slave
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u8,
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// Need I/O Update
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bool,
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);
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pub struct Parts<'a, DEV: 'a, SPI, CS0, CS1, CS2, GPIO> {
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pub spi1: SPISlave<'a, DEV, SPI, CS0, CS1, CS2, GPIO>,
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pub spi2: SPISlave<'a, DEV, SPI, CS0, CS1, CS2, GPIO>,
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pub spi3: SPISlave<'a, DEV, SPI, CS0, CS1, CS2, GPIO>,
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pub spi4: SPISlave<'a, DEV, SPI, CS0, CS1, CS2, GPIO>,
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pub spi5: SPISlave<'a, DEV, SPI, CS0, CS1, CS2, GPIO>,
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pub spi6: SPISlave<'a, DEV, SPI, CS0, CS1, CS2, GPIO>,
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pub spi7: SPISlave<'a, DEV, SPI, CS0, CS1, CS2, GPIO>,
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pub struct Parts<'a, SPI, CS0, CS1, CS2, GPIO> {
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pub spi1: SPISlave<'a, SPI, CS0, CS1, CS2, GPIO>,
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pub spi2: SPISlave<'a, SPI, CS0, CS1, CS2, GPIO>,
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pub spi3: SPISlave<'a, SPI, CS0, CS1, CS2, GPIO>,
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pub spi4: SPISlave<'a, SPI, CS0, CS1, CS2, GPIO>,
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pub spi5: SPISlave<'a, SPI, CS0, CS1, CS2, GPIO>,
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pub spi6: SPISlave<'a, SPI, CS0, CS1, CS2, GPIO>,
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pub spi7: SPISlave<'a, SPI, CS0, CS1, CS2, GPIO>,
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}
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impl<'a, DEV, SPI, CS0, CS1, CS2, GPIO> Parts<'a, DEV, SPI, CS0, CS1, CS2, GPIO> {
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pub(crate) fn new(cpld: &'a DEV) -> Self {
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impl<'a, SPI, CS0, CS1, CS2, GPIO> Parts<'a, SPI, CS0, CS1, CS2, GPIO> {
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pub(crate) fn new(cpld: &'a CPLD<SPI, CS0, CS1, CS2, GPIO>) -> Self {
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Parts {
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spi1: SPISlave(&cpld, 1, false, PhantomData),
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spi2: SPISlave(&cpld, 2, false, PhantomData),
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spi3: SPISlave(&cpld, 3, true, PhantomData),
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spi4: SPISlave(&cpld, 4, true, PhantomData),
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spi5: SPISlave(&cpld, 5, true, PhantomData),
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spi6: SPISlave(&cpld, 6, true, PhantomData),
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spi7: SPISlave(&cpld, 7, true, PhantomData),
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spi1: SPISlave(&cpld, 1, false),
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spi2: SPISlave(&cpld, 2, false),
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spi3: SPISlave(&cpld, 3, true),
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spi4: SPISlave(&cpld, 4, true),
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spi5: SPISlave(&cpld, 5, true),
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spi6: SPISlave(&cpld, 6, true),
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spi7: SPISlave(&cpld, 7, true),
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}
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}
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}
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impl<'a, DEV, SPI, CS0, CS1, CS2, GPIO, E> Transfer<u8> for SPISlave<'a, DEV, SPI, CS0, CS1, CS2, GPIO>
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impl<'a, SPI, CS0, CS1, CS2, GPIO, E> Transfer<u8> for SPISlave<'a, SPI, CS0, CS1, CS2, GPIO>
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where
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CS2: OutputPin,
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CS1: OutputPin,
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CS0: OutputPin,
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DEV: DoOnGetRefMutData<SPI, CS0, CS1, CS2, GPIO>,
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SPI: Transfer<u8, Error = E>,
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GPIO: OutputPin,
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{
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type Error = Error<E>;
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fn transfer<'w>(&mut self, words: &'w mut[u8]) -> Result<&'w [u8], Self::Error> {
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self.0.do_on_get_ref_mut_data(move |mut dev| {
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dev.select_chip(self.1).map_err(|_| Error::CSError)?;
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let result = dev.spi.transfer(words).map_err(Error::SPI)?;
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dev.select_chip(0).map_err(|_| Error::CSError)?;
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if self.2 {
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dev.issue_io_update().map_err(|_| Error::IOUpdateError)?;
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}
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Ok(result)
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})
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let mut dev = self.0.data.try_borrow_mut().map_err(|_| Error::GetRefMutDataError)?;
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dev.select_chip(self.1).map_err(|_| Error::CSError)?;
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let result = dev.spi.transfer(words).map_err(Error::SPI)?;
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dev.select_chip(0).map_err(|_| Error::CSError)?;
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if self.2 {
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dev.issue_io_update().map_err(|_| Error::IOUpdateError)?;
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}
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Ok(result)
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}
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}
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