From 4200a09d094eb9a4fcfbab77af8d1ee799dec701 Mon Sep 17 00:00:00 2001
From: Lucas Schumacher <technolucas@protonmail.com>
Date: Tue, 26 Sep 2023 14:13:50 -0400
Subject: [PATCH] LedC works up to 2.5MHz

---
 src/main.rs | 88 ++++++++++++++++++++++++++++++++++++++++++-----------
 1 file changed, 70 insertions(+), 18 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index 35aa487..da62636 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -4,13 +4,19 @@
 extern crate alloc;
 use core::mem::MaybeUninit;
 use esp_backtrace as _;
-//use esp_println::println;
 
 use embedded_hal::serial::Read;
 use hal::{clock::ClockControl, i2c::I2C, peripherals::Peripherals, prelude::*};
-use hal::{uart, Uart /*Delay*/, IO};
+use hal::{
+    ledc::{
+        channel::{self, ChannelIFace},
+        timer::{self, TimerIFace},
+        HighSpeed, LEDC,
+    },
+    uart, Uart, /*Delay*/
+    IO,
+};
 
-use si5351;
 use si5351::{Si5351, Si5351Device};
 
 #[global_allocator]
@@ -62,13 +68,41 @@ fn main() -> ! {
             log::info!("Si5351 Initialized succesfully");
             main_loop(clock, serial);
         }
-        Err(si5351::Error::CommunicationError) => {
-            log::info!("Could not initialize Si5351: CommunicationError");
-            main_loop(Dummy {}, serial);
-        }
-        Err(si5351::Error::InvalidParameter) => {
-            log::info!("Could not initialize Si5351: InvalidParameter");
-            main_loop(Dummy {}, serial);
+        Err(e) => {
+            match e {
+                si5351::Error::InvalidParameter => {
+                    log::warn!("Could not initialize Si5351; Using LedC PWM")
+                }
+                si5351::Error::CommunicationError => {
+                    log::info!("Could not find Si5351 device; Using LedC PWM")
+                }
+            }
+            let ledc = LEDC::new(
+                peripherals.LEDC,
+                &clocks,
+                &mut system.peripheral_clock_control,
+            );
+            let led = io.pins.gpio4.into_push_pull_output();
+
+            let mut hstimer0 = ledc.get_timer::<HighSpeed>(timer::Number::Timer0);
+            hstimer0
+                .configure(timer::config::Config {
+                    duty: timer::config::Duty::Duty5Bit,
+                    clock_source: timer::HSClockSource::APBClk,
+                    frequency: 1u32.MHz(),
+                })
+                .unwrap();
+
+            let mut channel0 = ledc.get_channel(channel::Number::Channel0, led);
+            channel0
+                .configure(channel::config::Config {
+                    timer: &hstimer0,
+                    duty_pct: 50,
+                    pin_config: channel::config::PinConfig::PushPull,
+                })
+                .unwrap();
+
+            main_loop(ledc, serial);
         }
     }
 }
@@ -87,9 +121,27 @@ fn main_loop<T: Clockable, U: _esp_hal_uart_Instance>(mut clock: T, mut serial:
 trait Clockable {
     fn set_freq(&mut self, freq: u32) -> Result<(), ()>;
 }
-impl<T> Clockable for T
+
+impl Clockable for LEDC<'_> {
+    fn set_freq(&mut self, freq: u32) -> Result<(), ()> {
+        let mut hstimer0 = self.get_timer::<HighSpeed>(timer::Number::Timer0);
+
+        let res = hstimer0.configure(timer::config::Config {
+            duty: timer::config::Duty::Duty5Bit,
+            clock_source: timer::HSClockSource::APBClk,
+            frequency: freq.Hz(),
+        });
+
+        match res {
+            Ok(_) => Ok(()),
+            Err(_) => Err(()),
+        }
+    }
+}
+
+impl<T> Clockable for Si5351Device<T>
 where
-    T: Si5351,
+    Si5351Device<T>: Si5351,
 {
     fn set_freq(&mut self, freq: u32) -> Result<(), ()> {
         match self.set_frequency(si5351::PLL::A, si5351::ClockOutput::Clk0, freq) {
@@ -130,28 +182,28 @@ fn read_freq<T: _esp_hal_uart_Instance>(serial: &mut Uart<'_, T>) -> u32 {
     loop {
         match nb::block!(serial.read()) {
             Ok(input) if input >= b'0' && input <= b'9' => {
-                log::info!("Got char: {}", char::from(input));
+                log::debug!("Got char: {}", char::from(input));
                 freq = (freq * 10) + (input - b'0') as u32;
             }
             Ok(input) if invalid && (input == b'\n' || input == b'\r') => {
-                log::info!("Got bad end: {}", char::from(input));
+                log::debug!("Got bad end: {}", char::from(input));
                 freq = 0;
                 invalid = false;
             }
             Ok(input) if !invalid && (input == b'\n' || input == b'\r') => {
-                log::info!("Got end: {}", char::from(input));
+                log::debug!("Got end: {}", char::from(input));
                 break;
             }
             Ok(input) if input == b'.' || input == b',' || input == b'_' => {
-                log::info!("Got ignor: {}", char::from(input));
+                log::debug!("Got ignor: {}", char::from(input));
                 continue;
             }
             Ok(input) => {
-                log::info!("Got inval: {}", char::from(input));
+                log::debug!("Got inval: {}", char::from(input));
                 invalid = true;
             }
             Err(e) => {
-                log::info!("Got error: {:?}", e);
+                log::debug!("Got error: {:?}", e);
             }
         }
     }