Merge pull request #480 from youndong/blinky_on_stm32h747i_disco

Add new blinky example using GPIOs on STM32H747i-Disco

Author: richardeoin

Cargo.toml

@@ -151,6 +151,10 @@ opt-level = "s" # optimize for binary size
 # `required-features` field specifies the hal features and/or the hardware
 # configuration required by the example.
 
+[[example]]
+name = "blinky-stm32h747i-disco"
+required-features = ["rt", "stm32h747cm7"]
+
 [[example]]
 name = "can-echo"
 required-features = ["can"]

examples/blinky-stm32h747i-disco.rs

@@ -0,0 +1,65 @@
+#![deny(warnings)] // This code runs on stm32h747i-disco and does not use example! macro.
+#![allow(unused_macros)]
+#![no_main]
+#![no_std]
+
+use cortex_m_rt::entry;
+use stm32h7xx_hal::{pac, prelude::*};
+
+use log::info;
+
+#[macro_use]
+mod utilities;
+
+#[entry]
+fn main() -> ! {
+    utilities::logger::init();
+    let cp = cortex_m::Peripherals::take().unwrap();
+    let dp = pac::Peripherals::take().unwrap();
+
+    // Constrain and Freeze power
+    info!("Setup PWR...                  ");
+    let pwr = dp.PWR.constrain();
+    // let pwrcfg = example_power!(pwr).freeze();
+    let pwrcfg = pwr.smps().freeze(); // This code works normally on stm32h747i-disco.
+
+    // Constrain and Freeze clock
+    // RCC (Reset and Clock Control)
+    info!("Setup RCC...                  ");
+    let rcc = dp.RCC.constrain();
+
+    // CCDR (Core Clock Distribution and Reset)
+    //  link: https://docs.rs/stm32h7xx-hal/latest/stm32h7xx_hal/rcc/struct.Ccdr.html
+    let ccdr = rcc.sys_ck(100.MHz()).freeze(pwrcfg, &dp.SYSCFG);
+
+    info!("");
+    info!("stm32h7xx-hal example - Blinky");
+    info!("");
+
+    let gpioi = dp.GPIOI.split(ccdr.peripheral.GPIOI); // <= GPIO settings for LEDs
+
+    // Configure gpio pins as output.
+    let mut led1 = gpioi.pi12.into_push_pull_output(); // PI12 for LED1
+    let mut led2 = gpioi.pi13.into_push_pull_output(); // PI13 for LED2
+    let mut led3 = gpioi.pi14.into_push_pull_output(); // PI14 for LED3
+    let mut led4 = gpioi.pi15.into_push_pull_output(); // PI15 for LED4
+
+    // Get the delay provider.
+    let mut delay = cp.SYST.delay(ccdr.clocks);
+
+    loop {
+        loop {
+            led1.set_high();
+            led2.set_low();
+            led3.set_high();
+            led4.set_low();
+            delay.delay_ms(500_u16);
+
+            led1.set_low();
+            led2.set_high();
+            led3.set_low();
+            led4.set_high();
+            delay.delay_ms(500_u16);
+        }
+    }
+}