wip

.cargo/config.toml

+[target.thumbv7em-none-eabihf]
+rustflags = [
+  "-C", "link-arg=-Tlink.x",
+]
+
+[build]
+target = "thumbv7em-none-eabihf" # Cortex-M4F and Cortex-M7F (with FPU)
+
+[target.'cfg(all(target_arch = "arm", target_os = "none"))']
+runner = "arm-none-eabi-gdb -x openocd.gdb"

.gitignore

+/target

.gitlab-ci.yml

+image: "rust:latest"
+
+stages:
+  - lint
+
+before_script:
+  - rustup target add thumbv7em-none-eabihf
+  - rustup component add rustfmt
+  - rustup component add clippy
+
+lint:
+  stage: lint
+  script:
+    - cargo fmt -- --check
+    - cargo clippy --all-features -- -D warnings

Cargo.lock

+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "bare-metal"
+version = "0.2.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5deb64efa5bd81e31fcd1938615a6d98c82eafcbcd787162b6f63b91d6bac5b3"
+dependencies = [
+ "rustc_version",
+]
+
+[[package]]
+name = "bare-metal"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f8fe8f5a8a398345e52358e18ff07cc17a568fbca5c6f73873d3a62056309603"
+
+[[package]]
+name = "bitfield"
+version = "0.13.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "46afbd2983a5d5a7bd740ccb198caf5b82f45c40c09c0eed36052d91cb92e719"
+
+[[package]]
+name = "bitflags"
+version = "2.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "24a6904aef64d73cf10ab17ebace7befb918b82164785cb89907993be7f83813"
+
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
+[[package]]
+name = "core2"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "239fa3ae9b63c2dc74bd3fa852d4792b8b305ae64eeede946265b6af62f1fff3"
+dependencies = [
+ "memchr",
+]
+
+[[package]]
+name = "cortex-m"
+version = "0.7.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8ec610d8f49840a5b376c69663b6369e71f4b34484b9b2eb29fb918d92516cb9"
+dependencies = [
+ "bare-metal 0.2.5",
+ "bitfield",
+ "critical-section",
+ "embedded-hal 0.2.7",
+ "volatile-register",
+]
+
+[[package]]
+name = "cortex-m-rt"
+version = "0.7.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ee84e813d593101b1723e13ec38b6ab6abbdbaaa4546553f5395ed274079ddb1"
+dependencies = [
+ "cortex-m-rt-macros",
+]
+
+[[package]]
+name = "cortex-m-rt-macros"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f0f6f3e36f203cfedbc78b357fb28730aa2c6dc1ab060ee5c2405e843988d3c7"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "cortex-m-semihosting"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c23234600452033cc77e4b761e740e02d2c4168e11dbf36ab14a0f58973592b0"
+dependencies = [
+ "cortex-m",
+]
+
+[[package]]
+name = "critical-section"
+version = "1.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6548a0ad5d2549e111e1f6a11a6c2e2d00ce6a3dafe22948d67c2b443f775e52"
+
+[[package]]
+name = "crossbeam-utils"
+version = "0.8.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3c063cd8cc95f5c377ed0d4b49a4b21f632396ff690e8470c29b3359b346984b"
+dependencies = [
+ "cfg-if",
+]
+
+[[package]]
+name = "embedded-dma"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "994f7e5b5cb23521c22304927195f236813053eb9c065dd2226a32ba64695446"
+dependencies = [
+ "stable_deref_trait",
+]
+
+[[package]]
+name = "embedded-hal"
+version = "0.2.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "35949884794ad573cf46071e41c9b60efb0cb311e3ca01f7af807af1debc66ff"
+dependencies = [
+ "nb 0.1.3",
+ "void",
+]
+
+[[package]]
+name = "embedded-hal"
+version = "1.0.0-alpha.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c3babfc7fd332142a0b11aebf592992f211f4e01b6222fb04b03aba1bd80018d"
+dependencies = [
+ "nb 1.1.0",
+]
+
+[[package]]
+name = "embedded-storage"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "723dce4e9f25b6e6c5f35628e144794e5b459216ed7da97b7c4b66cdb3fa82ca"
+
+[[package]]
+name = "fugit"
+version = "0.3.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7ab17bb279def6720d058cb6c052249938e7f99260ab534879281a95367a87e5"
+dependencies = [
+ "gcd",
+]
+
+[[package]]
+name = "fugit-timer"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d9607bfc4c388f9d629704f56ede4a007546cad417b3bcd6fc7c87dc7edce04a"
+dependencies = [
+ "fugit",
+ "nb 1.1.0",
+]
+
+[[package]]
+name = "gcd"
+version = "2.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a4b1b088ad0a967aa29540456b82fc8903f854775d33f71e9709c4efb3dfbfd2"
+
+[[package]]
+name = "memchr"
+version = "2.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2dffe52ecf27772e601905b7522cb4ef790d2cc203488bbd0e2fe85fcb74566d"
+
+[[package]]
+name = "nb"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "801d31da0513b6ec5214e9bf433a77966320625a37860f910be265be6e18d06f"
+dependencies = [
+ "nb 1.1.0",
+]
+
+[[package]]
+name = "nb"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8d5439c4ad607c3c23abf66de8c8bf57ba8adcd1f129e699851a6e43935d339d"
+
+[[package]]
+name = "panic-semihosting"
+version = "0.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ee8a3e1233d9073d76a870223512ce4eeea43c067a94a445c13bd6d792d7b1ab"
+dependencies = [
+ "cortex-m",
+ "cortex-m-semihosting",
+]
+
+[[package]]
+name = "pi-transceiver-firmware"
+version = "0.1.0"
+dependencies = [
+ "core2",
+ "cortex-m",
+ "cortex-m-rt",
+ "nb 1.1.0",
+ "panic-semihosting",
+ "rf4463",
+ "ringbuf",
+ "stm32f4xx-hal",
+]
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.47"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5ea3d908b0e36316caf9e9e2c4625cdde190a7e6f440d794667ed17a1855e725"
+dependencies = [
+ "unicode-ident",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bbe448f377a7d6961e30f5955f9b8d106c3f5e449d493ee1b125c1d43c2b5179"
+dependencies = [
+ "proc-macro2",
+]
+
+[[package]]
+name = "rand_core"
+version = "0.6.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ec0be4795e2f6a28069bec0b5ff3e2ac9bafc99e6a9a7dc3547996c5c816922c"
+
+[[package]]
+name = "rf4463"
+version = "0.1.0"
+dependencies = [
+ "embedded-hal 0.2.7",
+]
+
+[[package]]
+name = "ringbuf"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "79abed428d1fd2a128201cec72c5f6938e2da607c6f3745f769fabea399d950a"
+dependencies = [
+ "crossbeam-utils",
+]
+
+[[package]]
+name = "rustc_version"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "138e3e0acb6c9fb258b19b67cb8abd63c00679d2851805ea151465464fe9030a"
+dependencies = [
+ "semver",
+]
+
+[[package]]
+name = "semver"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1d7eb9ef2c18661902cc47e535f9bc51b78acd254da71d375c2f6720d9a40403"
+dependencies = [
+ "semver-parser",
+]
+
+[[package]]
+name = "semver-parser"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
+
+[[package]]
+name = "stable_deref_trait"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a8f112729512f8e442d81f95a8a7ddf2b7c6b8a1a6f509a95864142b30cab2d3"
+
+[[package]]
+name = "stm32f4"
+version = "0.15.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fb94729242cd1aebe6dab42a2ca0131985ae93bc3ab2751b680df724bb35528d"
+dependencies = [
+ "bare-metal 1.0.0",
+ "cortex-m",
+ "cortex-m-rt",
+ "vcell",
+]
+
+[[package]]
+name = "stm32f4xx-hal"
+version = "0.16.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "431cd6045c6644beb39d421a37967e7f0708bce98ed6e38559137e09d5ae6d81"
+dependencies = [
+ "bare-metal 1.0.0",
+ "bitflags",
+ "cortex-m",
+ "cortex-m-rt",
+ "embedded-dma",
+ "embedded-hal 0.2.7",
+ "embedded-hal 1.0.0-alpha.8",
+ "embedded-storage",
+ "fugit",
+ "fugit-timer",
+ "nb 1.1.0",
+ "rand_core",
+ "stm32f4",
+ "time",
+ "void",
+]
+
+[[package]]
+name = "syn"
+version = "1.0.105"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "60b9b43d45702de4c839cb9b51d9f529c5dd26a4aff255b42b1ebc03e88ee908"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
+[[package]]
+name = "time"
+version = "0.3.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a561bf4617eebd33bca6434b988f39ed798e527f51a1e797d0ee4f61c0a38376"
+dependencies = [
+ "time-core",
+]
+
+[[package]]
+name = "time-core"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2e153e1f1acaef8acc537e68b44906d2db6436e2b35ac2c6b42640fff91f00fd"
+
+[[package]]
+name = "unicode-ident"
+version = "1.0.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6ceab39d59e4c9499d4e5a8ee0e2735b891bb7308ac83dfb4e80cad195c9f6f3"
+
+[[package]]
+name = "vcell"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "77439c1b53d2303b20d9459b1ade71a83c716e3f9c34f3228c00e6f185d6c002"
+
+[[package]]
+name = "void"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6a02e4885ed3bc0f2de90ea6dd45ebcbb66dacffe03547fadbb0eeae2770887d"
+
+[[package]]
+name = "volatile-register"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9ee8f19f9d74293faf70901bc20ad067dc1ad390d2cbf1e3f75f721ffee908b6"
+dependencies = [
+ "vcell",
+]

Cargo.toml

+[package]
+name = "pi-transceiver-firmware"
+version = "0.1.0"
+authors = ["Stephen D <webmaster@scd31.com>"]
+edition = "2021"
+readme = "README.md"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+stm32f4xx-hal = { version = "0.16", features = ["stm32f411"]}
+cortex-m = "0.7"
+cortex-m-rt = "0.7"
+# cortex-m-semihosting = "0.5"
+panic-semihosting = "0.6"
+nb = "1.0.0"
+core2 = { version = "0.3", default_features = false }
+rf4463 = { path = "../rf4463" }
+ringbuf = { version = "0.3", default_features = false }

README.md

+# stm32f411-blackpill-template
+
+A template for getting started with the stm32f411 blackpill in Rust.

build.rs

+use std::env;
+use std::fs::File;
+use std::io::Write;
+use std::path::PathBuf;
+
+fn main() {
+    // Put the linker script somewhere the linker can find it
+    let out = &PathBuf::from(env::var_os("OUT_DIR").unwrap());
+    File::create(out.join("memory.x"))
+        .unwrap()
+        .write_all(include_bytes!("memory.x"))
+        .unwrap();
+    println!("cargo:rustc-link-search={}", out.display());
+
+    // Only re-run the build script when memory.x is changed,
+    // instead of when any part of the source code changes.
+    println!("cargo:rerun-if-changed=memory.x");
+}

flash.rb

+project = "ballon-transceiver-firmware"
+
+puts `cargo build --release`
+puts `openocd -f interface/stlink.cfg -f target/stm32f4x.cfg -f interface/stlink.cfg -c "program target/thumbv7em-none-eabihf/release/#{project} verify reset exit"`

memory.x

+MEMORY
+{
+  /* NOTE K = KiBi = 1024 bytes */
+  FLASH : ORIGIN = 0x08000000, LENGTH = 512K 
+  RAM : ORIGIN = 0x20000000, LENGTH = 128K
+}
+
+/* This is where the call stack will be allocated. */
+/* The stack is of the full descending type. */
+/* NOTE Do NOT modify `_stack_start` unless you know what you are doing */
+_stack_start = ORIGIN(RAM) + LENGTH(RAM);

openocd.cfg

+# Sample OpenOCD configuration for the STM32F3DISCOVERY development board
+
+# Depending on the hardware revision you got you'll have to pick ONE of these
+# interfaces. At any time only one interface should be commented out.
+
+# Revision C (newer revision)
+source [find interface/stlink-v2-1.cfg]
+
+# Revision A and B (older revisions)
+# source [find interface/stlink-v2.cfg]
+
+source [find target/stm32f4x.cfg]

openocd.gdb

+target extended-remote :3333
+
+# print demangled symbols
+set print asm-demangle on
+
+# set backtrace limit to not have infinite backtrace loops
+set backtrace limit 32
+
+# detect unhandled exceptions, hard faults and panics
+# break DefaultHandler
+# break HardFault
+# break rust_begin_unwind
+# # run the next few lines so the panic message is printed immediately
+# # the number needs to be adjusted for your panic handler
+# commands $bpnum
+# next 4
+# end
+
+# *try* to stop at the user entry point (it might be gone due to inlining)
+# break main
+
+monitor arm semihosting enable
+
+# # send captured ITM to the file itm.fifo
+# # (the microcontroller SWO pin must be connected to the programmer SWO pin)
+# # 8000000 must match the core clock frequency
+# monitor tpiu config internal itm.txt uart off 8000000
+
+# # OR: make the microcontroller SWO pin output compatible with UART (8N1)
+# # 8000000 must match the core clock frequency
+# # 2000000 is the frequency of the SWO pin
+# monitor tpiu config external uart off 8000000 2000000
+
+# # enable ITM port 0
+# monitor itm port 0 on
+
+load
+
+# start the process but immediately halt the processor
+stepi

rustfmt.toml

+edition = "2021"

src/main.rs

+#![no_main]
+#![no_std]
+
+extern crate cortex_m;
+#[macro_use(entry, exception)]
+extern crate cortex_m_rt as rt;
+#[macro_use(block)]
+extern crate nb;
+extern crate panic_semihosting;
+
+extern crate stm32f4xx_hal as hal;
+// #[macro_use(block)]
+// extern crate nb;
+
+use core::borrow::BorrowMut;
+use core::cell::RefCell;
+
+use core2::io::{Cursor, Write};
+use cortex_m::interrupt::{free, Mutex};
+use cortex_m::peripheral::NVIC;
+use hal::gpio::{self, Alternate, Pin, Pull, PushPull};
+use hal::pac::{self, SPI2};
+use hal::spi::{Event, Mode, Phase, Polarity, Spi, SpiSlave};
+use rf4463::config::RADIO_CONFIG_500_2;
+use rf4463::Rf4463;
+use ringbuf::{Rb, StaticRb};
+
+use crate::hal::{interrupt, prelude::*, serial::Serial};
+use crate::rt::ExceptionFrame;
+
+enum SlaveCmd {
+    BufferStatus,
+    SendPacket,
+}
+
+impl SlaveCmd {
+    pub fn from_u8(i: u8) -> Option<Self> {
+        match i {
+            0 => Some(Self::BufferStatus),
+            1 => Some(Self::SendPacket),
+            _ => None,
+        }
+    }
+}
+
+enum SlaveState {
+    Idle,
+    BufferStatus,
+    RecvPacket(usize),
+}
+
+static SPI_SLAVE: Mutex<RefCell<Option<SpiSlave<SPI2, false, u8>>>> =
+    Mutex::new(RefCell::new(None));
+
+static SLAVE_STATE: Mutex<RefCell<SlaveState>> = Mutex::new(RefCell::new(SlaveState::Idle));
+
+static BUF: Mutex<RefCell<Option<StaticRb<u8, 16384>>>> = Mutex::new(RefCell::new(None));
+
+const MODE: Mode = Mode {
+    polarity: Polarity::IdleLow,
+    phase: Phase::CaptureOnFirstTransition,
+};
+
+#[entry]
+fn main() -> ! {
+    let cp = cortex_m::Peripherals::take().unwrap();
+    let dp = pac::Peripherals::take().unwrap();
+
+    let mut rcc = dp.RCC.constrain();
+
+    let mut gpioa = dp.GPIOA.split();
+    let mut gpiob = dp.GPIOB.split();
+
+    // setup clocks
+    let clocks = rcc.cfgr.use_hse(25.MHz()).sysclk(48.MHz()).freeze();
+
+    // setup 4463 spi
+    let mosi = gpioa.pa7.into_alternate();
+    let miso = gpioa.pa6.into_alternate();
+    let sclk = gpioa.pa5.into_alternate();
+
+    let sdn = gpioa.pa1.into_push_pull_output();
+
+    let cs = gpioa.pa4.into_push_pull_output();
+
+    let spi = Spi::new(dp.SPI1, (sclk, miso, mosi), MODE, 10.MHz(), &clocks);
+
+    let delay = dp.TIM2.delay_ms(&clocks);
+    let mut radio = Rf4463::new(spi, sdn, cs, delay, &RADIO_CONFIG_500_2).unwrap();
+
+    // setup Pi SPI (we're the slave)
+    let sck2 = gpiob.pb13.internal_resistor(Pull::Up);
+    let miso2 = gpiob.pb14.internal_resistor(Pull::Down);
+    let mosi2 = gpiob.pb15.internal_resistor(Pull::Down);
+    let nss = gpiob.pb12.internal_resistor(Pull::Up).into(); // TODO
+
+    let mut spi2 = dp.SPI2.spi_slave((sck2, miso2, mosi2, Some(nss)), MODE);
+
+    // fill up the tx buffer
+    while spi2.is_tx_empty() {
+        spi2.write(&[0x00]);
+    }
+
+    spi2.listen(Event::Rxne);
+
+    free(|cs| {
+        BUF.borrow(cs).replace(Some(StaticRb::default()));
+        SPI_SLAVE.borrow(cs).replace(Some(spi2));
+    });
+
+    // enable spi2 interrupt
+    unsafe {
+        NVIC::unmask(interrupt::SPI2);
+    }
+
+    const LEN: usize = 256 + 2 + 65;
+    let mut data = [0; LEN];
+    let mut i = 0;
+
+    loop {
+        if i == LEN {
+            radio.tx(&data).unwrap();
+            i = 0;
+            continue;
+        }
+
+        free(|cs| {
+            let mut buf = BUF.borrow(cs).borrow_mut();
+            let buf = buf.as_mut().unwrap();
+
+            if let Some(b) = buf.pop() {
+                data[i] = b;
+
+                i += 1;
+
+                if buf.free_len() == 16000 {
+                    //block!(USART.borrow(cs).borrow_mut().as_mut().unwrap().write(b'E')).unwrap();
+                }
+            }
+        });
+    }
+}
+
+#[exception]
+unsafe fn HardFault(ef: &ExceptionFrame) -> ! {
+    panic!("{:#?}", ef);
+}
+
+#[interrupt]
+fn SPI2() {
+    free(|cs| {
+        let mut spi = SPI_SLAVE.borrow(cs).borrow_mut();
+        let spi = spi.as_mut().unwrap();
+
+        let x = [0];
+        spi.read(&mut x).unwrap();
+        spi.write(&[0x00]).unwrap();
+
+        let mut buf = BUF.borrow(cs).borrow_mut();
+        let buf = buf.as_mut().unwrap();
+
+        buf.push(x).unwrap();
+
+        if buf.free_len() == 400 {
+            block!(us.write(b'F')).unwrap();
+        }
+    });
+}