From 5af5dcab8734461964cf3c126ca1a7e9f3659ed1 Mon Sep 17 00:00:00 2001
From: Per Lindgren <per.lindgren@ltu.se>
Date: Sun, 11 Feb 2018 23:35:00 +0100
Subject: [PATCH] rtfm examples
---
.vscode/launch.json | 14 ++++++
examples/rtfm-serial-dma-rx.rs | 88 ++++++++++++++++++++++++++++++++++
examples/serial-dma-rx.rs | 5 ++
3 files changed, 107 insertions(+)
create mode 100644 examples/rtfm-serial-dma-rx.rs
diff --git a/.vscode/launch.json b/.vscode/launch.json
index 9cdce3d..963cbbd 100644
--- a/.vscode/launch.json
+++ b/.vscode/launch.json
@@ -124,6 +124,20 @@
"servertype": "openocd",
"name": "c serial-dma-rx",
"executable": "./target/thumbv7em-none-eabihf/debug/examples/serial-dma-rx",
+ //"debugger_args": "so .gdbint",
+ "configFiles": [
+ "interface/stlink.cfg",
+ "target/stm32f4x.cfg"
+ ],
+ "cwd": "${workspaceRoot}"
+ },
+ {
+ "type": "cortex-debug",
+ "request": "launch",
+ "servertype": "openocd",
+ "name": "c rtfm-serial-dma-rx",
+ "executable": "./target/thumbv7em-none-eabihf/debug/examples/rtfm-serial-dma-rx",
+ //"debugger_args": "so .gdbint",
"configFiles": [
"interface/stlink.cfg",
"target/stm32f4x.cfg"
diff --git a/examples/rtfm-serial-dma-rx.rs b/examples/rtfm-serial-dma-rx.rs
new file mode 100644
index 0000000..97b29e0
--- /dev/null
+++ b/examples/rtfm-serial-dma-rx.rs
@@ -0,0 +1,88 @@
+//! Serial interface echo server
+//!
+//! In this example every received byte will be sent back to the sender. You can test this example
+//! with serial terminal emulator like `minicom`.
+//!
+//!
+#![deny(unsafe_code)]
+//#![deny(warnings)]
+#![feature(proc_macro)]
+#![no_std]
+
+#[macro_use(singleton)]
+extern crate cortex_m;
+extern crate cortex_m_rtfm as rtfm;
+extern crate stm32f4x_hal as hal;
+
+use hal::prelude::*;
+use hal::serial::{Rx, Serial, Tx};
+use hal::dma::Event;
+use hal::stm32f4x;
+use rtfm::{app, Threshold};
+use cortex_m::asm;
+
+app! {
+ device: stm32f4x,
+
+ resources : {
+ static X: u32;
+ // static CB: CircBuffer<[u8; 8], dma1::S6<C5>>;
+ },
+
+ tasks: {
+ DMA1_STREAM6: {
+ path: tx,
+ resources : [X]
+ },
+ DMA1_STREAM5: {
+ path: rx,
+ resources : [X]
+ }
+ }
+}
+
+fn init(p: init::Peripherals) -> init::LateResources {
+ let mut flash = p.device.FLASH.constrain();
+ let mut rcc = p.device.RCC.constrain();
+ let mut gpioa = p.device.GPIOA.split(&mut rcc.ahb1);
+ let streams = p.device.DMA1.split(&mut rcc.ahb1);
+ let mut tx_stream = streams.1.into_channel4(); // S6<C4>
+ let mut rx_stream = streams.0.into_channel4(); // S5<C4>
+
+ let clocks = rcc.cfgr.freeze(&mut flash.acr);
+
+ let tx = gpioa.pa2.into_af7(&mut gpioa.moder, &mut gpioa.afrl);
+ let rx = gpioa.pa3.into_af7(&mut gpioa.moder, &mut gpioa.afrl);
+
+ let mut serial = Serial::usart2(
+ p.device.USART2,
+ (tx, rx),
+ 115_200.bps(),
+ clocks,
+ &mut rcc.apb1,
+ );
+
+ let (tx, rx) = serial.split();
+ //tx_stream.listen(Event::TransferComplete);
+ rx_stream.listen(Event::TransferComplete);
+
+ let buf = singleton!(: [u8; 8] = [0; 8]).unwrap();
+
+ let _ = tx.write_all(tx_stream, b"The quick brown fox");
+ init::LateResources { X: 0 }
+}
+
+fn idle() -> ! {
+ // sleep
+ loop {
+ // rtfm::wfi();
+ }
+}
+
+fn tx(_: &mut Threshold, mut r: DMA1_STREAM6::Resources) {
+ asm::bkpt();
+}
+
+fn rx(_: &mut Threshold, mut r: DMA1_STREAM5::Resources) {
+ asm::bkpt();
+}
diff --git a/examples/serial-dma-rx.rs b/examples/serial-dma-rx.rs
index 90cd775..f48d41e 100644
--- a/examples/serial-dma-rx.rs
+++ b/examples/serial-dma-rx.rs
@@ -8,6 +8,8 @@
#[macro_use(singleton)]
extern crate cortex_m;
+#[macro_use]
+extern crate cortex_m_debug;
extern crate stm32f4x_hal as f4;
use cortex_m::asm;
@@ -16,6 +18,8 @@ use f4::serial::Serial;
use f4::stm32f4x;
fn main() {
+ ipln!("serial-dma-rx");
+
let p = stm32f4x::Peripherals::take().unwrap();
let mut flash = p.FLASH.constrain();
@@ -35,6 +39,7 @@ fn main() {
let buf = singleton!(: [u8; 8] = [0; 8]).unwrap();
let (_buf, _c, _rx) = rx.read_exact(rx_stream, buf).wait();
+ ipln!("{:?}", _buf);
asm::bkpt();
}
--
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