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// Copyright (c) 2017-2019 Rene van der Meer // // Permission is hereby granted, free of charge, to any person obtaining a // copy of this software and associated documentation files (the "Software"), // to deal in the Software without restriction, including without limitation // the rights to use, copy, modify, merge, publish, distribute, sublicense, // and/or sell copies of the Software, and to permit persons to whom the // Software is furnished to do so, subject to the following conditions: // // The above copyright notice and this permission notice shall be included in // all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL // THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER // DEALINGS IN THE SOFTWARE. use embedded_hal::blocking::spi::{Transfer, Write}; use embedded_hal::spi::FullDuplex; use nb; use super::{Error, Result, Spi}; impl Transfer<u8> for Spi { type Error = Error; fn transfer<'a>(&mut self, buffer: &'a mut [u8]) -> Result<&'a [u8]> { let write_buffer = buffer.to_vec(); Spi::transfer(self, buffer, &write_buffer)?; Ok(buffer) } } impl Write<u8> for Spi { type Error = Error; fn write(&mut self, buffer: &[u8]) -> Result<()> { Spi::write(self, buffer)?; Ok(()) } } impl FullDuplex<u8> for Spi { type Error = Error; fn read(&mut self) -> nb::Result<u8, Self::Error> { Ok(self.last_read) } fn send(&mut self, byte: u8) -> nb::Result<(), Self::Error> { let mut read_buffer: [u8; 1] = [0]; Spi::transfer(self, &mut read_buffer, &[byte])?; self.last_read = read_buffer[0]; Ok(()) } }