bmp581 0.1.0

Platform-agnostic Rust driver for the Bosch BMP581 pressure sensor.
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
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138

use crate::types::Error;
use embedded_hal::i2c::{I2c, SevenBitAddress};
use embedded_hal::spi::SpiDevice;

/// Default I2C address of BMP581
pub const I2C_ADDRESS: u8 = 0x46;
/// Alternative I2C address when SDO is pulled high
pub const I2C_ADDRESS_ALT: u8 = 0x47;

pub struct I2cInterface<I2C> {
    pub i2c: I2C,
    pub address: u8,
}

pub struct SpiInterface<SPI> {
    pub spi: SPI,
}

#[derive(Debug, Default, Clone, Copy)]
pub enum I2cAddr {
    #[default]
    Default,
    Alternative,
}

impl I2cAddr {
    pub fn addr(self) -> SevenBitAddress {
        match self {
            I2cAddr::Default => I2C_ADDRESS,
            I2cAddr::Alternative => I2C_ADDRESS_ALT,
        }
    }
}

pub trait WriteData {
    type Error;
    fn write(&mut self, payload: &mut [u8]) -> Result<(), Self::Error>;
    fn write_reg(&mut self, register: u8, data: u8) -> Result<(), Self::Error>;
}

pub trait ReadData {
    type Error;
    fn read(&mut self, payload: &mut [u8]) -> Result<(), Self::Error>;
    fn read_reg(&mut self, register: u8) -> Result<u8, Self::Error>;
}

impl<I2C> WriteData for I2cInterface<I2C>
where
    I2C: I2c,
{
    type Error = Error<I2C::Error>;
    fn write(&mut self, payload: &mut [u8]) -> Result<(), Self::Error> {
        self.i2c
            .write(self.address as SevenBitAddress, payload)
            .map_err(Error::Comm)
    }

    fn write_reg(&mut self, register: u8, data: u8) -> Result<(), Self::Error> {
        let payload: [u8; 2] = [register, data];
        self.i2c
            .write(self.address as SevenBitAddress, &payload)
            .map_err(Error::Comm)
    }
}

impl<I2C> ReadData for I2cInterface<I2C>
where
    I2C: I2c,
{
    type Error = Error<I2C::Error>;
    fn read(&mut self, payload: &mut [u8]) -> Result<(), Self::Error> {
        self.i2c
            .write_read(
                self.address as SevenBitAddress,
                &[payload[0]],
                &mut payload[1..],
            )
            .map_err(Error::Comm)
    }

    fn read_reg(&mut self, register: u8) -> Result<u8, Self::Error> {
        let mut data = [0];
        self.i2c
            .write_read(self.address as SevenBitAddress, &[register], &mut data)
            .map_err(Error::Comm)
            .and(Ok(data[0]))
    }
}

impl<SPI, CommE> WriteData for SpiInterface<SPI>
where
    SPI: SpiDevice<Error = CommE>,
{
    type Error = Error<CommE>;
    fn write(&mut self, payload: &mut [u8]) -> Result<(), Self::Error> {
        payload[0] += 0x80;

        // `write` asserts and deasserts CS for us. No need to do it manually!
        let res = self.spi.write(&payload).map_err(Error::Comm);

        res
    }

    fn write_reg(&mut self, register: u8, data: u8) -> Result<(), Self::Error> {
        let payload: [u8; 2] = [register + 0x80, data];

        // `write` asserts and deasserts CS for us. No need to do it manually!
        let res = self.spi.write(&payload).map_err(Error::Comm);

        res
    }
}

impl<SPI, CommE> ReadData for SpiInterface<SPI>
where
    SPI: SpiDevice<Error = CommE>,
{
    type Error = Error<CommE>;
    fn read(&mut self, payload: &mut [u8]) -> Result<(), Self::Error> {
        // `read` asserts and deasserts CS for us. No need to do it manually!
        let res = self.spi.read(payload).map_err(Error::Comm);

        res?;
        Ok(())
    }

    fn read_reg(&mut self, register: u8) -> Result<u8, Self::Error> {
        let mut payload = [register, 0];

        // `read` asserts and deasserts CS for us. No need to do it manually!
        let res = self.spi.read(&mut payload).map_err(Error::Comm);

        match res {
                Ok(_) => Ok(payload[1]),
                Err(e) => Err(e)
        }   
    }
}