add f103 example for input_capture

5 files changed, 151 insertions, 0 deletions

diff --git a/examples/stm32f1/.vscode/launch.json b/examples/stm32f1/.vscode/launch.json
new file mode 100644
index 000000000..7d1504a39
--- /dev/null
+++ b/examples/stm32f1/.vscode/launch.json
@@ -0,0 +1,33 @@
+{
+    /* 
+     * Requires the Rust Language Server (rust-analyzer) and Cortex-Debug extensions
+     * https://marketplace.visualstudio.com/items?itemName=rust-lang.rust-analyzer
+     * https://marketplace.visualstudio.com/items?itemName=marus25.cortex-debug
+     */
+    "version": "0.2.0",
+    "configurations": [
+        {
+            /* Configuration for the STM32F446 Discovery board */
+            "type": "cortex-debug",
+            "request": "launch",
+            "name": "Debug (OpenOCD)",
+            "servertype": "openocd",
+            "cwd": "${workspaceRoot}",
+            "preLaunchTask": "Cargo Build (debug)",
+            "runToEntryPoint": "main",
+            "executable": "./target/thumbv7m-none-eabi/debug/input_capture",
+            /* Run `cargo build --example itm` and uncomment this line to run itm example */
+            // "executable": "./target/thumbv7em-none-eabihf/debug/examples/itm",
+            "device": "STM32F103TB",
+            "configFiles": [
+                "interface/stlink.cfg",
+                "target/stm32f1x.cfg"
+            ],
+            "postLaunchCommands": [
+                "monitor arm semihosting enable"
+            ],
+            "postRestartCommands": [],
+            "postResetCommands": [],
+        }
+    ]
+}
\ No newline at end of file
diff --git a/examples/stm32f1/.vscode/tasks.json b/examples/stm32f1/.vscode/tasks.json
new file mode 100644
index 000000000..e153722da
--- /dev/null
+++ b/examples/stm32f1/.vscode/tasks.json
@@ -0,0 +1,21 @@
+{
+        "version": "2.0.0",
+        "tasks": [
+                {
+                        "type": "cargo",
+                        "command": "build",
+                        "problemMatcher": [
+                                "$rustc"
+                        ],
+                        "args": [
+                                "--bin",
+                                "input_capture"
+                        ],
+                        "group": {
+                                "kind": "build",
+                                "isDefault": true
+                        },
+                        "label": "Cargo Build (debug)",
+                }
+        ]
+}
\ No newline at end of file
diff --git a/examples/stm32f1/openocd.cfg b/examples/stm32f1/openocd.cfg
new file mode 100644
index 000000000..0325cd651
--- /dev/null
+++ b/examples/stm32f1/openocd.cfg
@@ -0,0 +1,5 @@
+# Sample OpenOCD configuration for the STM32F3DISCOVERY development board
+
+source [find interface/stlink.cfg]
+
+source [find target/stm32f1x.cfg]
diff --git a/examples/stm32f1/openocd.gdb b/examples/stm32f1/openocd.gdb
new file mode 100644
index 000000000..7795319fb
--- /dev/null
+++ b/examples/stm32f1/openocd.gdb
@@ -0,0 +1,40 @@
+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
diff --git a/examples/stm32f1/src/bin/input_capture.rs b/examples/stm32f1/src/bin/input_capture.rs
new file mode 100644
index 000000000..417830231
--- /dev/null
+++ b/examples/stm32f1/src/bin/input_capture.rs
@@ -0,0 +1,52 @@
+#![no_std]
+#![no_main]
+
+use defmt::*;
+use embassy_executor::Spawner;
+use embassy_stm32::gpio::{Level, Output, Pull, Speed};
+use embassy_stm32::time::khz;
+use embassy_stm32::timer::input_capture::{CapturePin, InputCapture};
+use embassy_stm32::timer::{self, Channel};
+use embassy_stm32::{bind_interrupts, peripherals};
+use embassy_time::Timer;
+use {defmt_rtt as _, panic_probe as _};
+
+/// Connect PA2 and PC13 with a 1k Ohm resistor
+
+#[embassy_executor::task]
+async fn blinky(led: peripherals::PC13) {
+    let mut led = Output::new(led, Level::High, Speed::Low);
+
+    loop {
+        info!("high");
+        led.set_high();
+        Timer::after_millis(300).await;
+
+        info!("low");
+        led.set_low();
+        Timer::after_millis(300).await;
+    }
+}
+
+bind_interrupts!(struct Irqs {
+    TIM2 => timer::CaptureCompareInterruptHandler<peripherals::TIM2>;
+});
+
+#[embassy_executor::main]
+async fn main(spawner: Spawner) {
+    let p = embassy_stm32::init(Default::default());
+    info!("Hello World!");
+
+    unwrap!(spawner.spawn(blinky(p.PC13)));
+
+    let ch3 = CapturePin::new_ch3(p.PA2, Pull::None);
+    let mut ic = InputCapture::new(p.TIM2, None, None, Some(ch3), None, Irqs, khz(1000), Default::default());
+
+    loop {
+        info!("wait for risign edge");
+        ic.wait_for_rising_edge(Channel::Ch3).await;
+
+        let capture_value = ic.get_capture_value(Channel::Ch3);
+        info!("new capture! {}", capture_value);
+    }
+}