Interface TouchScreen

framework_lib/src/touchscreen.rs:191–237

}

pub trait TouchScreen {
    fn open_device(usage_page: u16, skip: u8) -> Option<Self>
    where
        Self: std::marker::Sized;
    fn send_message(&self, message_id: u8, read_len: usize, data: Vec<u8>) -> Option<Vec<u8>>;

    fn check_fw_version(&self) -> Option<()> {
        println!("Touchscreen");

        let res = self.send_message(0x42, 3, vec![0])?;
        let ver = res
            .iter()
            .skip(1)
            .fold(format!("{:02X}", res[0]), |acc, &x| {
                acc + "." + &format!("{:02X}", x)
            });
        // Expecting 06.00.0A
        debug!("  Protocol Version: v{}", ver);

        let res = self.send_message(0x40, 8, vec![0])?;
        let ver = res
            .iter()
            .skip(1)
            .fold(res[0].to_string(), |acc, &x| acc + "." + &x.to_string());
        println!("  Firmware Version: v{}", ver);

        let res = self.send_message(0x20, 16, vec![0])?;
        let mut protocols = vec![];
        if (res[15] & USI_BITMAP) > 0 {
            protocols.push("USI");
        }
        if (res[15] & MPP_BITMAP) > 0 {
            protocols.push("MPP");
        }
        println!("  Protocols:        {}", protocols.join(", "));

        Some(())
    }

    fn enable_touch(&self, enable: bool) -> Option<()> {
        self.send_message(0x38, 0, vec![!enable as u8, 0x00])?;
        Some(())
    }

    fn get_stylus_fw(&self) -> Option<()>;
    fn get_battery_status(&self) -> Option<u8>;
}

pub fn get_battery_level() -> Option<u8> {
    for skip in 0..5 {