rxprog 1.0.2

Library implementing the Boot Mode protocol for specific Renesas microcontrollers and CLI for programming firmware images
Documentation 
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use std::ops::RangeInclusive;

use super::command_impl_prelude::*;

/// Requests information about the device's user areas
#[derive(Debug)]
pub struct UserAreaInformationInquiry {}

impl TransmitCommandData for UserAreaInformationInquiry {
    fn command_data(&self) -> CommandData {
        CommandData {
            opcode: 0x25,
            has_size_field: false,
            payload: vec![],
        }
    }
}

impl Receive for UserAreaInformationInquiry {
    type Response = Vec<RangeInclusive<u32>>;

    fn rx<T: io::Read>(&self, p: &mut T) -> Result<Self::Response> {
        let mut reader =
            ResponseReader::<_, SizedResponse<u8>, NoError>::new(p, ResponseFirstByte::Byte(0x35));

        let data = reader.read_response()?.data;

        let area_count = data[0];

        let mut areas: Vec<RangeInclusive<u32>> = vec![];
        let mut remaining_data = &data[1..];
        for _ in 0..area_count {
            let (area_data, new_remaining_data) = remaining_data.split_at(8);

            let mut area_start_address_bytes = [0u8; 4];
            area_start_address_bytes.copy_from_slice(&area_data[0..=3]);
            let mut area_end_address_bytes = [0u8; 4];
            area_end_address_bytes.copy_from_slice(&area_data[4..=7]);

            let area_start_address = u32::from_be_bytes(area_start_address_bytes);
            let area_end_address = u32::from_be_bytes(area_end_address_bytes);

            // TODO: Check if inclusive
            areas.push(area_start_address..=area_end_address);

            remaining_data = new_remaining_data;
        }

        Ok(areas)
    }
}

#[cfg(test)]
mod tests {
    use super::super::test_util::is_script_complete;
    use super::*;

    #[test]
    fn test_tx() -> Result<()> {
        let cmd = UserAreaInformationInquiry {};
        let command_bytes = [0x25];
        let mut p = mock_io::Builder::new().write(&command_bytes).build();

        cmd.tx(&mut p)?;

        assert!(is_script_complete(&mut p));

        Ok(())
    }

    #[test]
    fn test_rx() {
        let cmd = UserAreaInformationInquiry {};
        let response_bytes = [
            0x35, 0x11, 0x02, // Header
            0x10, 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00, // Area 1
            0x12, 0x34, 0x56, 0x78, 0x89, 0xAB, 0xCD, 0xEF, // Area 2
            0x85, // Checksum
        ];
        let mut p = mock_io::Builder::new().read(&response_bytes).build();

        let response = cmd.rx(&mut p);

        assert_eq!(
            response,
            Ok(vec![0x10000000..=0x20000000, 0x12345678..=0x89ABCDEF]),
        );
        assert!(is_script_complete(&mut p));
    }
}