sim7020 2.2.0

driver for sim7020E NB IoT modem
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83

use crate::at_command::{AtRequest, AtResponse, BufferType};
use crate::AtError;
use at_commands::parser::CommandParser;

#[cfg(feature = "defmt")]
use defmt::info;

#[cfg_attr(feature = "defmt", derive(defmt::Format))]
pub enum ControlFlowStatus {
    No,
    Software,
    Hardware,
}

#[cfg_attr(feature = "defmt", derive(defmt::Format))]
pub struct SetFlowControl {
    pub(crate) ta_to_te: ControlFlowStatus,
    pub(crate) te_to_ta: ControlFlowStatus,
}

impl ControlFlowStatus {
    fn to_int(&self) -> i32 {
        match self {
            ControlFlowStatus::No => 0,
            ControlFlowStatus::Software => 1,
            ControlFlowStatus::Hardware => 2,
        }
    }
}

impl AtRequest for SetFlowControl {
    type Response = Result<(), AtError>;

    fn get_command<'a>(&'a self, buffer: &'a mut BufferType) -> Result<&'a [u8], usize> {
        at_commands::builder::CommandBuilder::create_set(buffer, true)
            .named("+IFC")
            .with_int_parameter(self.ta_to_te.to_int())
            .with_int_parameter(self.te_to_ta.to_int())
            .finish()
    }
}

#[cfg_attr(feature = "defmt", derive(defmt::Format))]
pub struct GetFlowControl;

impl AtRequest for GetFlowControl {
    type Response = Result<(), AtError>;

    fn get_command<'a>(&'a self, buffer: &'a mut BufferType) -> Result<&'a [u8], usize> {
        at_commands::builder::CommandBuilder::create_query(buffer, true)
            .named("+IFC")
            .finish()
    }

    /// dce_by_dte: method that will be used by TE at receive of data
    ///             from TA
    /// dte_by_dce: Specifies the method will be used by TA at receive of data
    ///             from TE
    fn parse_response(&self, data: &[u8]) -> Result<AtResponse, AtError> {
        let (dce_by_dte, dte_by_dce, _) = CommandParser::parse(data)
            .expect_optional_identifier(b"AT+IFC?\r")
            .expect_identifier(b"\r\n+IFC: ")
            .expect_int_parameter()
            .expect_int_parameter()
            .expect_raw_string()
            .finish()?;
        let dce_by_dte = match dce_by_dte {
            0 => ControlFlowStatus::No,
            1 => ControlFlowStatus::Software,
            2 => ControlFlowStatus::Hardware,
            _ => panic!("Invalid dce-by-dte parameter returned"),
        };
        let dte_by_dce = match dte_by_dce {
            0 => ControlFlowStatus::No,
            1 => ControlFlowStatus::Software,
            2 => ControlFlowStatus::Hardware,
            _ => panic!("Invalid dce-by-dte parameter returned"),
        };
        #[cfg(feature = "defmt")]
        info!("parity {}, {}", dce_by_dte, dte_by_dce);
        Ok(AtResponse::ControlFlow(dce_by_dte, dte_by_dce))
    }
}