mirror of
https://github.com/mytechnotalent/Embedded-Hacking.git
synced 2026-05-26 01:07:53 +02:00
Kevin Thomas
115 lines
3.9 KiB
Rust
115 lines
3.9 KiB
Rust
//! @file main.rs
|
|
//! @brief SPI loopback demonstration
|
|
//! @author Kevin Thomas
|
|
//! @date 2025
|
|
//!
|
|
//! MIT License
|
|
//!
|
|
//! Copyright (c) 2025 Kevin Thomas
|
|
//!
|
|
//! 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.
|
|
//!
|
|
//! -----------------------------------------------------------------------------
|
|
//!
|
|
//! Demonstrates SPI in master mode using the spi.rs driver. A loopback wiring
|
|
//! of MOSI to MISO verifies full-duplex transfer, and transmitted plus received
|
|
//! data is printed over UART every second.
|
|
//!
|
|
//! Wiring (loopback test):
|
|
//! GPIO19 (MOSI) -> GPIO16 (MISO)
|
|
//! GPIO18 (SCK) -> logic analyzer or slave SCK
|
|
//! GPIO17 (CS) -> slave CS (active-low)
|
|
|
|
#![no_std]
|
|
#![no_main]
|
|
|
|
// Board-level helpers: constants, type aliases, and init functions
|
|
mod board;
|
|
// SPI driver module — suppress warnings for unused public API functions
|
|
#[allow(dead_code)]
|
|
mod spi;
|
|
|
|
// Debugging output over RTT
|
|
use defmt_rtt as _;
|
|
// Panic handler for RISC-V targets
|
|
#[cfg(target_arch = "riscv32")]
|
|
use panic_halt as _;
|
|
// Panic handler for ARM targets
|
|
#[cfg(target_arch = "arm")]
|
|
use panic_probe as _;
|
|
|
|
// HAL entry-point macro
|
|
use hal::entry;
|
|
|
|
// Alias our HAL crate
|
|
#[cfg(rp2350)]
|
|
use rp235x_hal as hal;
|
|
#[cfg(rp2040)]
|
|
use rp2040_hal as hal;
|
|
|
|
// Second-stage boot loader for RP2040
|
|
#[unsafe(link_section = ".boot2")]
|
|
#[used]
|
|
#[cfg(rp2040)]
|
|
pub static BOOT2: [u8; 256] = rp2040_boot2::BOOT_LOADER_W25Q080;
|
|
|
|
// Boot metadata for the RP2350 Boot ROM
|
|
#[unsafe(link_section = ".start_block")]
|
|
#[used]
|
|
#[cfg(rp2350)]
|
|
pub static IMAGE_DEF: hal::block::ImageDef = hal::block::ImageDef::secure_exe();
|
|
|
|
/// Application entry point for the SPI loopback demo.
|
|
#[entry]
|
|
fn main() -> ! {
|
|
let mut pac = hal::pac::Peripherals::take().unwrap();
|
|
let clocks = board::init_clocks(
|
|
pac.XOSC, pac.CLOCKS, pac.PLL_SYS, pac.PLL_USB, &mut pac.RESETS,
|
|
&mut hal::Watchdog::new(pac.WATCHDOG),
|
|
);
|
|
let pins = board::init_pins(pac.IO_BANK0, pac.PADS_BANK0, pac.SIO, &mut pac.RESETS);
|
|
let uart = board::init_uart(pac.UART0, pins.gpio0, pins.gpio1, &mut pac.RESETS, &clocks);
|
|
let mut delay = board::init_delay(&clocks);
|
|
let (mut spi_dev, mut cs) = board::init_spi(
|
|
pac.SPI0,
|
|
pins.gpio16,
|
|
pins.gpio17,
|
|
pins.gpio18,
|
|
pins.gpio19,
|
|
&mut pac.RESETS,
|
|
&clocks,
|
|
);
|
|
uart.write_full_blocking(b"SPI driver initialized on SPI0 at 1000000 Hz\r\n");
|
|
loop {
|
|
board::loopback_transfer(&mut spi_dev, &mut cs, &uart, &mut delay);
|
|
}
|
|
}
|
|
|
|
// Picotool binary info metadata
|
|
#[unsafe(link_section = ".bi_entries")]
|
|
#[used]
|
|
pub static PICOTOOL_ENTRIES: [hal::binary_info::EntryAddr; 5] = [
|
|
hal::binary_info::rp_cargo_bin_name!(),
|
|
hal::binary_info::rp_cargo_version!(),
|
|
hal::binary_info::rp_program_description!(c"SPI Loopback Demo"),
|
|
hal::binary_info::rp_cargo_homepage_url!(),
|
|
hal::binary_info::rp_program_build_attribute!(),
|
|
];
|
|
|
|
// End of file
|