rust/ina3221
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases 1 Wiki Activity

Configure i2c device and shunt resistor

Browse Source
This commit is contained in:
Thomas Klaehn 2025-01-16 13:29:25 +01:00
parent bf5ee0ec78
commit 014b45d517
3 changed files with 8 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
examples/current.rs
View File

@ -1,10 +1,10 @@
use ina3221; use ina3221;
fn main() { fn main() {
let mut ina = ina3221::Ina3221::new(0x40); let mut ina = ina3221::Ina3221::new(0x40, "/dev/i2c-1", 5.0);
let res = match ina.current(ina3221::Channel::One) { let res = match ina.current(ina3221::Channel::One) {
Ok(value) => value, Ok(value) => value,
Err(error) => panic!("Can't read i2c: {error:?}"), Err(error) => panic!("Can't read i2c: {error:?}"),
}; };
println!("Channel one current: {:?} mA", res); println!("Channel one current: {:?} A", res);
} }

2
examples/voltage.rs
View File

@ -1,7 +1,7 @@
use ina3221; use ina3221;
fn main() { fn main() {
let mut ina = ina3221::Ina3221::new(0x40); let mut ina = ina3221::Ina3221::new(0x40, "/dev/i2c-1", 5.0);
let res = match ina.bus_voltage(ina3221::Channel::One) { let res = match ina.bus_voltage(ina3221::Channel::One) {
Ok(value) => value, Ok(value) => value,
Err(error) => panic!("Can't read i2c: {error:?}"), Err(error) => panic!("Can't read i2c: {error:?}"),

8
src/lib.rs
View File

@ -17,11 +17,11 @@ pub struct Ina3221 {
impl Ina3221 { impl Ina3221 {
pub fn new(slave_address: u16) -> Ina3221 { pub fn new(slave_address: u16, i2c_device: &str, shunt_resistor: f64) -> Ina3221 {
Ina3221 { Ina3221 {
slave_addr: slave_address, slave_addr: slave_address,
i2c_device: format!("/dev/i2c-1"), i2c_device: format!("{}", i2c_device),
shunt_resistor: 1.0, shunt_resistor,
} }
} }
@ -66,7 +66,7 @@ impl Ina3221 {
pub fn current(&mut self, channel: Channel) -> Result<f64, LinuxI2CError> { pub fn current(&mut self, channel: Channel) -> Result<f64, LinuxI2CError> {
let tmp: f64 = self.shunt_voltage(channel)?; let tmp: f64 = self.shunt_voltage(channel)?;
let res: f64 = tmp * self.shunt_resistor; let res: f64 = tmp / self.shunt_resistor * 100.0; // No idea why multiplying with 100 but the result seems to be correct...
Ok(res) Ok(res)
} }
} }