From 334207664ba7347d202fe1e2c1c31ba24be96a38 Mon Sep 17 00:00:00 2001
From: hodasemi <michaelh.95@t-online.de>
Date: Sat, 15 Apr 2023 11:45:21 +0200
Subject: [PATCH] Start usb serial

---
 src/main.rs           |  1 +
 src/usb_serial/mod.rs | 70 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 71 insertions(+)
 create mode 100644 src/usb_serial/mod.rs

diff --git a/src/main.rs b/src/main.rs
index 995ac9b..8e18822 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -5,6 +5,7 @@
 
 mod mouse_hid;
 mod mouse_sensor;
+mod usb_serial;
 
 use embassy_executor::Spawner;
 use embassy_futures::join::join;
diff --git a/src/usb_serial/mod.rs b/src/usb_serial/mod.rs
new file mode 100644
index 0000000..71e84a5
--- /dev/null
+++ b/src/usb_serial/mod.rs
@@ -0,0 +1,70 @@
+use core::future::Future;
+
+use embassy_rp::usb::Driver;
+use embassy_rp::{interrupt, peripherals::USB};
+
+use embassy_usb::class::cdc_acm::{CdcAcmClass, State};
+use embassy_usb::class::hid::{HidWriter, ReportId, RequestHandler};
+use embassy_usb::control::OutResponse;
+use embassy_usb::{Builder, Config, UsbDevice};
+
+use usbd_hid::descriptor::{MouseReport, SerializedDescriptor};
+
+static mut DEVICE_DESCRIPTOR_BUFFER: [u8; 256] = [0; 256];
+static mut CONFIG_DESCRIPTOR_BUFFER: [u8; 256] = [0; 256];
+static mut BOS_DESCRIPTOR_BUFFER: [u8; 256] = [0; 256];
+static mut MSOS_DESCRIPTOR_BUFFER: [u8; 256] = [0; 256];
+static mut CONTROL_BUFFER: [u8; 64] = [0; 64];
+static mut STATE: Option<State<'static>> = None;
+static mut USB: Option<UsbDevice<'static, Driver<'static, USB>>> = None;
+
+pub struct Serial<'a> {
+    class: CdcAcmClass<'a, Driver<'a, USB>>,
+}
+
+impl Serial<'static> {
+    pub fn new(usb: USB) -> Serial<'static> {
+        // Create the driver, from the HAL.
+        let irq = interrupt::take!(USBCTRL_IRQ);
+        let driver = Driver::new(usb, irq);
+
+        // Create embassy-usb Config
+        let mut config = Config::new(0xc0de, 0xcafe);
+        config.manufacturer = Some("Embassy");
+        config.product = Some("USB-serial example");
+        config.serial_number = Some("12345678");
+        config.max_power = 100;
+        config.max_packet_size_0 = 64;
+
+        // Required for windows compatiblity.
+        // https://developer.nordicsemi.com/nRF_Connect_SDK/doc/1.9.1/kconfig/CONFIG_CDC_ACM_IAD.html#help
+        config.device_class = 0xEF;
+        config.device_sub_class = 0x02;
+        config.device_protocol = 0x01;
+        config.composite_with_iads = true;
+
+        unsafe {
+            STATE = Some(State::new());
+        }
+
+        let mut builder = Builder::new(
+            driver,
+            config,
+            unsafe { &mut DEVICE_DESCRIPTOR_BUFFER },
+            unsafe { &mut CONFIG_DESCRIPTOR_BUFFER },
+            unsafe { &mut BOS_DESCRIPTOR_BUFFER },
+            unsafe { &mut MSOS_DESCRIPTOR_BUFFER },
+            unsafe { &mut CONTROL_BUFFER },
+        );
+
+        // Create classes on the builder.
+        let class = CdcAcmClass::new(&mut builder, unsafe { STATE.as_mut().unwrap() }, 64);
+
+        // Build the builder.
+        unsafe {
+            USB = Some(builder.build());
+        };
+
+        Self { class }
+    }
+}