#![no_std]
#![no_main]
use esp_hal::{
clock::ClockControl,
peripherals::Peripherals,
gpio::*,
prelude::*,
systimer::SystemTimer,
timer::TimerGroup,
Rtc,
IO,
Delay,
};
use core::mem::MaybeUninit;
use keypad2::{Keypad, Columns, Rows};
use esp_println::println;
use esp_backtrace as _;
extern crate alloc;
#[global_allocator]
static ALLOCATOR: esp_alloc::EspHeap = esp_alloc::EspHeap::empty();
fn init_heap() {
const HEAP_SIZE: usize = 32 * 1024;
static mut HEAP: MaybeUninit<[u8; HEAP_SIZE]> = MaybeUninit::uninit();
unsafe {
ALLOCATOR.init(HEAP.as_mut_ptr() as *mut u8, HEAP_SIZE);
}
}
use alloc::string::String;
use alloc::string;
#[entry]
fn main() -> ! {
init_heap();
let peripherals = Peripherals::take();
let mut system = peripherals.SYSTEM.split();
let clocks = ClockControl::boot_defaults(system.clock_control).freeze();
// Disable the RTC and TIMG watchdog timers
let mut rtc = Rtc::new(peripherals.LPWR);
let timer_group0 = TimerGroup::new(
peripherals.TIMG0,
&clocks
);
let mut wdt0 = timer_group0.wdt;
let timer_group1 = TimerGroup::new(
peripherals.TIMG1,
&clocks
);
let mut wdt1 = timer_group1.wdt;
rtc.rwdt.disable();
wdt0.disable();
wdt1.disable();
let mut delay = Delay::new(&clocks);
let io = IO::new(peripherals.GPIO, peripherals.IO_MUX);
let pwd : String = String::from("12345");
let mut keypad = Keypad::new((
/* ROWS */
io.pins.gpio6.into_pull_up_input(), // R1
io.pins.gpio5.into_pull_up_input(), // R2
io.pins.gpio4.into_pull_up_input(), // R3
io.pins.gpio3.into_pull_up_input(), // R4
),
(
/* COLUMNS */
io.pins.gpio2.into_open_drain_output(), // COL1
io.pins.gpio1.into_open_drain_output(), // COL2
io.pins.gpio0.into_open_drain_output(), // COL3
));
let mut user_pwd: String = String::new();
loop {
let mut key = keypad.read_char(&mut delay);
if key != ' '
{
/* Use # as an Enter button */
if key == '#' {
if user_pwd == pwd
{
/* Some additional callback here */
println!("Correct!");
user_pwd.clear();
}
else
{
user_pwd.clear();
println!("Wrong password! Try again...");
}
}
else
{
println!("{}", key);
user_pwd.push(key);
}
while (key != ' ') { key = keypad.read_char(&mut delay);}
}
}
}
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esp32-s2-devkitm-1
esp32-s2-devkitm-1