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#![no_std]
pub mod command;
use crate::command::Command;
use embedded_hal::serial;
use embedded_hal::blocking::delay::DelayMs;
use heapless::String;
use heapless::consts::*;
use core::fmt::Write;
use nb::block;
pub struct Hm11<TX, RX> {
tx: TX,
rx: RX,
received : [u8; 32], cmd_buffer: String<U32>,
expected_buffer: String<U32>
}
impl<TX, RX> Hm11<TX, RX>
where TX: serial::Write<u8>,
RX: serial::Read<u8>
{
pub fn new (tx: TX, rx: RX) -> Self
{
Self {
tx: tx,
rx: rx,
received: [0u8; 32],
cmd_buffer: String::new(),
expected_buffer: String::new(),
}
}
pub fn release(self) -> (TX, RX) {
(self.tx, self.rx)
}
pub fn send(&mut self, cmd: Command) -> Result<(), ()> {
self.command(cmd)
}
pub fn send_with_delay<DELAY>(&mut self, cmd: Command, delay: &mut DELAY) -> Result<(), ()>
where DELAY: DelayMs<u8>
{
delay.delay_ms(20);
self.command(cmd)
}
fn command(&mut self, cmd: Command) -> Result<(), ()>
{
self.cmd_buffer.clear();
self.expected_buffer.clear();
let (command, expected) = match cmd {
Command::Baud9600 => ("AT+BAUD0", "OK+Set:0"),
Command::Baud19200 => ("AT+BAUD1", "OK+Set:1"),
Command::Baud38400 => ("AT+BAUD2", "OK+Set:2"),
Command::Baud57600 => ("AT+BAUD3", "OK+Set:3"),
Command::Baud115200 => ("AT+BAUD4", "OK+Set:4"),
Command::Baud4800 => ("AT+BAUD5", "OK+Set:5"),
Command::Baud2400 => ("AT+BAUD6", "OK+Set:6"),
Command::Baud1200 => ("AT+BAUD7", "OK+Set:7"),
Command::Baud230400 => ("AT+BAUD8", "OK+Set:8"),
Command::Test => {
("AT", "OK")
},
Command::Disconnect => {
("AT", "OK+LOST")
},
Command::Reset => {
("AT+RESET", "OK+RESET")
},
Command::SetName(name) => {
write!(self.cmd_buffer, "AT+NAME{}", name).unwrap();
write!(self.expected_buffer, "OK+Set:{}", name).unwrap();
(self.cmd_buffer.as_str(), self.expected_buffer.as_str())
},
Command::SystemLedMode(mode) => {
if mode {
("AT+PIO11", "OK+Set:1")
} else {
("AT+PIO10", "OK+Set:0")
}
},
Command::Sleep => {
("AT+SLEEP", "OK+SLEEP")
},
Command::Notify(val) => {
write!(self.cmd_buffer, "AT+NOTI{}", val as u8).unwrap();
write!(self.expected_buffer, "OK+Set:{}", val as u8).unwrap();
(self.cmd_buffer.as_str(), self.expected_buffer.as_str())
}
};
for byte in command.as_bytes() {
block!(self.tx.write(*byte)).ok();
}
let len = expected.len();
for i in 0..len {
if let Some(byte) = block!(self.rx.read()).ok() {
self.received[i] = byte;
} else {
return Err(());
}
}
let expected_bytes = expected.as_bytes();
for i in 0..len {
if self.received[i] != expected_bytes[i] {
return Err(());
}
}
Ok(())
}
}