Added stm32f3 example,

This is example is missing good usage of the crate,
but before that eh_personality needs to be fixed

examples/stm32f3discovery/.cargo/config

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+[build]
+#rustflags = ["-Aproc-macro-derive-resolution-fallback"]

examples/stm32f3discovery/.gbdinit

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+target remote :3333
+
+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.fifo uart off 64000000
+
+# # OR: make the microcontroller SWO pin output compatible with UART (8N1)
+# # 2000000 is the frequency of the SWO pin
+# monitor tpiu config external uart off 64000000 2000000
+
+# # enable ITM port 0
+# monitor itm port 0 on
+
+load
+step

examples/stm32f3discovery/Cargo.toml

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+[package]
+name = "STM32F3DISCOVERY-EInk-Example"
+version = "0.1.0"
+authors = ["Christoph Groß <christoph-gross@mailbox.org>"]
+
+[dependencies]
+
+#eink_waveshare_rs = { git = "https://github.com/Caemor/eink-waveshare-rs"}
+#eink_waveshare_rs = { path = "../../"}
+eink_waveshare_rs = { path = "../../", default-features = false, features = ["epd1in54"]}
+
+#TODO: Update to the normal hal (either completly the f3 for the discovery or just stm3230x-hal) when PRs for InputPin are included
+stm32f30x-hal = { git = "https://github.com/droogmic/stm32f30x-hal", features = ["unproven"]}
+
+embedded-hal = { version = "0.2.1", features = ["unproven"] }
+
+aligned = "0.2.0"
+cortex-m = "0.5.7"
+cortex-m-rt = "0.6.3"
+cortex-m-semihosting = "0.3.1"
+madgwick = "0.1.1"
+panic-semihosting = "0.5.0"

examples/stm32f3discovery/src/main.rs

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+//! Example for EInk-Waveshare and STM32F3
+#![deny(unsafe_code)]
+#![no_main]
+#![no_std]
+//#![deny(warnings)]
+
+
+extern crate cortex_m_rt as rt;
+extern crate cortex_m;
+extern crate stm32f30x_hal;
+extern crate panic_semihosting;
+
+use rt::*;
+//use cortex_m::asm;
+use stm32f30x_hal::prelude::*;
+use stm32f30x_hal::spi::Spi;
+use stm32f30x_hal::stm32f30x;
+use stm32f30x_hal::delay::Delay;
+use rt::ExceptionFrame;
+
+//entry!(main);
+
+
+// the eink library
+extern crate eink_waveshare_rs;
+
+
+use eink_waveshare_rs::{
+    EPD1in54,
+    SPI_MODE,
+    //drawing::{Graphics},
+    color::Color,
+    WaveshareInterface,
+};
+
+
+
+
+// use lin_hal::spidev::{self, SpidevOptions};
+// use lin_hal::{Pin, Spidev};
+// use lin_hal::sysfs_gpio::Direction;
+// use lin_hal::Delay;
+
+// activate spi, gpio in raspi-config
+// needs to be run with sudo because of some sysfs_gpio permission problems and follow-up timing problems
+// see https://github.com/rust-embedded/rust-sysfs-gpio/issues/5 and follow-up issues
+
+/*
+*
+* BE CAREFUL: this wasn't tested yet, and the pins are also not choosen correctly (just some random ones atm)
+*
+*/
+#[entry]
+fn main() -> ! {
+    let cp = cortex_m::Peripherals::take().unwrap();
+    let p = stm32f30x::Peripherals::take().unwrap();
+
+    let mut flash = p.FLASH.constrain();
+    let mut rcc = p.RCC.constrain();
+
+    // clock configuration using the default settings (all clocks run at 8 MHz)
+    let clocks = rcc.cfgr.freeze(&mut flash.acr);
+    // TRY this alternate clock configuration (all clocks run at 16 MHz)
+    // let clocks = rcc.cfgr.sysclk(16.mhz()).freeze(&mut flash.acr);
+
+    let mut gpioa = p.GPIOA.split(&mut rcc.ahb);
+    let mut gpioe = p.GPIOE.split(&mut rcc.ahb);
+
+    // // Configure Digital I/O Pin to be used as Chip Select for SPI
+    let mut cs = gpioe
+        .pe3
+        .into_push_pull_output(&mut gpioe.moder, &mut gpioe.otyper);
+    cs.set_high();
+
+    // // Configure Busy Input Pin
+    let mut busy = gpioe
+        .pe4
+        .into_floating_input(&mut gpioe.moder, &mut gpioe.pupdr);
+   //     .pe4
+    //    .into_push_pull_output(&mut gpioe.moder, &mut gpioe.otyper);
+    
+    // let busy = Pin::new(5);//pin 29
+    // busy.export().expect("busy export");
+    // while !busy.is_exported() {}
+    // busy.set_direction(Direction::In).expect("busy Direction");
+    // //busy.set_value(1).expect("busy Value set to 1");
+    // let busy_in = HackInputPin::new(&busy);
+
+    // // Configure Data/Command OutputPin
+    let mut dc = gpioe
+        .pe5
+        .into_push_pull_output(&mut gpioe.moder, &mut gpioe.otyper);
+    dc.set_high();
+    // let dc = Pin::new(6); //pin 31 //bcm6
+    // dc.export().expect("dc export");
+    // while !dc.is_exported() {}
+    // dc.set_direction(Direction::Out).expect("dc Direction");
+    // dc.set_value(1).expect("dc Value set to 1");
+
+    let mut rst = gpioe
+        .pe6
+        .into_push_pull_output(&mut gpioe.moder, &mut gpioe.otyper);
+    rst.set_high();
+    // // Configure Reset OutputPin
+    // let rst = Pin::new(16); //pin 36 //bcm16
+    // rst.export().expect("rst export");
+    // while !rst.is_exported() {}
+    // rst.set_direction(Direction::Out).expect("rst Direction");
+    // rst.set_value(1).expect("rst Value set to 1");   
+
+    // // Configure Delay
+    let delay = Delay::new(cp.SYST, clocks);
+
+    // copied from the l3gd20 example
+    // The `L3gd20` abstraction exposed by the `f3` crate requires a specific pin configuration to
+    // be used and won't accept any configuration other than the one used here. Trying to use a
+    // different pin configuration will result in a compiler error.
+    let sck = gpioa.pa5.into_af5(&mut gpioa.moder, &mut gpioa.afrl);
+    let miso = gpioa.pa6.into_af5(&mut gpioa.moder, &mut gpioa.afrl);
+    let mosi = gpioa.pa7.into_af5(&mut gpioa.moder, &mut gpioa.afrl);
+
+    let spi = Spi::spi1(
+        p.SPI1,
+        (sck, miso, mosi),
+        SPI_MODE,
+        4.mhz(),
+        clocks,
+        &mut rcc.apb2,
+    );
+
+    // // Setup of the needed pins is finished here
+    // // Now the "real" usage of the eink-waveshare-rs crate begins
+    let mut epd = EPD1in54::new(spi, cs, busy, dc, rst, delay).unwrap();
+
+    //let mut l3gd20 = L3gd20::new(spi, nss).unwrap();
+
+    //let _m = l3gd20.all().unwrap();
+
+    // when you reach this breakpoint you'll be able to inspect the variable `_m` which contains the
+    // gyroscope and the temperature sensor readings
+    //asm::bkpt();
+
+        // // Clear the full screen
+    // epd.clear_frame();
+    // epd.display_frame();
+
+    // // Speeddemo
+    // let small_buffer =  [Color::Black.get_byte_value(), 16 as u8 / 8 * 16 as u8];
+    // let number_of_runs = 100;
+    // for i in 0..number_of_runs {
+    //     let offset = i * 8 % 150;
+    //     epd.update_partial_frame(&small_buffer, 25 + offset, 25 + offset, 16, 16)?;
+    //     epd.display_frame()?;
+    // }
+
+    // // Clear the full screen
+    // epd.clear_frame();
+    // epd.display_frame();
+
+    // // Draw some squares
+    // let mut small_buffer =  [Color::Black.get_byte_value(), 160 as u8 / 8 * 160 as u8];
+    // epd.update_partial_frame(&small_buffer, 20, 20, 160, 160)?;
+
+    // small_buffer =  [Color::White.get_byte_value(), 80 as u8 / 8 * 80 as u8];
+    // epd.update_partial_frame(&small_buffer, 60, 60, 80, 80)?;
+
+    // small_buffer =  [Color::Black.get_byte_value(), 8];
+    // epd.update_partial_frame(&small_buffer, 96, 96, 8, 8)?;
+
+    // // Display updated frame
+    // epd.display_frame()?;
+
+    // // Set the EPD to sleep
+    // epd.sleep()?;
+
+    loop {}
+}
+
+//exception!(HardFault, hard_fault);
+#[exception]
+fn HardFault(ef: &ExceptionFrame) -> ! {
+    panic!("{:#?}", ef);
+}
+
+//exception!(*, default_handler);
+#[exception]
+fn DefaultHandler(irqn: i16) {
+    panic!("Unhandled exception (IRQn = {})", irqn);
+}
+
+
+
+
+
+    
+
+