2 * Copyright (c) 2020 Tilman Sauerbeck (tilman at code-monkey de)
4 * Permission is hereby granted, free of charge, to any person obtaining
5 * a copy of this software and associated documentation files (the
6 * "Software"), to deal in the Software without restriction, including
7 * without limitation the rights to use, copy, modify, merge, publish,
8 * distribute, sublicense, and/or sell copies of the Software, and to
9 * permit persons to whom the Software is furnished to do so, subject to
10 * the following conditions:
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
19 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
20 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
21 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
40 pub fn new(cs_gpio: u32, cs_gpio_pin: u32) -> Mx25l {
43 cs_gpio_pin: cs_gpio_pin,
47 pub fn read_status(&self) -> u8 {
48 self.with_selected(|| {
49 spi::tx8(spi::SPI0, Command::RDSR as u8);
51 spi::tx8(spi::SPI0, 0xff)
55 pub fn read_id(&self) -> (u8, u16) {
56 self.with_selected(|| {
57 spi::tx8(spi::SPI0, Command::RDID as u8);
59 let manufacturer_id = spi::tx8(spi::SPI0, 0xff);
60 let device_id0 = spi::tx8(spi::SPI0, 0xff) as u16;
61 let device_id1 = spi::tx8(spi::SPI0, 0xff) as u16;
63 (manufacturer_id, device_id0 | (device_id1 << 8))
67 fn with_selected<F, T>(&self, func: F) -> T
68 where F: FnOnce() -> T
70 gpio::clear(self.cs_gpio, self.cs_gpio_pin);
74 gpio::set(self.cs_gpio, self.cs_gpio_pin);
80 impl Storage for Mx25l {
81 fn read(&self, address: usize, buffer: &mut [u8]) {
82 self.with_selected(|| {
83 spi::tx8(spi::SPI0, Command::READ as u8);
85 spi::tx8(spi::SPI0, (address >> 16) as u8);
86 spi::tx8(spi::SPI0, (address >> 8) as u8);
87 spi::tx8(spi::SPI0, (address >> 0) as u8);
89 for i in 0..buffer.len() {
90 buffer[i] = spi::tx8(spi::SPI0, 0xff);