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EIP&CIP client in pure Rust, for generic CIP and AB PLC
Add rseip to your cargo project's dependencies
rseip="0.1"
Please find detailed guides and examples from below sections.
use anyhow::Result;
use rseip::client::ab_eip::*;
use rseip::precludes::*;
#[tokio::main]
pub async fn main() -> Result<()> {
let mut client = AbEipClient::new_host_lookup("192.168.0.83")
.await?
.with_connection_path(PortSegment::default());
let tag = EPath::parse_tag("test_car1_x")?;
println!("read tag...");
let value: TagValue<i32> = client.read_tag(tag.clone()).await?;
println!("tag value: {:?}", value);
client.write_tag(tag, value).await?;
println!("write tag - done");
client.close().await?;
Ok(())
}
Please find more examples within examples.
Add rseip to your cargo project's dependencies
rseip={git="https://github.com/Joylei/eip-rs.git"}
Then, import modules of rseip to your project
use rseip::client::ab_eip::*;
use rseip::precludes::*;
Then, create an unconnected client
let mut client = AbEipClient::new_host_lookup("192.168.0.83")
.await?
.with_connection_path(PortSegment::default());
or create a connection
let mut client =
AbEipConnection::new_host_lookup("192.168.0.83", OpenOptions::default()).await?;
let tag = EPath::parse_tag("test_car1_x")?;
println!("read tag...");
let value: TagValue<i32> = client.read_tag(tag.clone()).await?;
let tag = EPath::parse_tag("test_car1_x")?;
let value = TagValue {
tag_type: TagType::Dint,
value: 10_i32,
};
client.write_tag(tag, value).await?;
println!("write tag - done");
TagValue, Decode, and Encode
As you may know, there are atomic types, structure types, and array type of tags. The library provides Encode to encode values, Decode to decode values, and TagValue to manipulate tag data values. The library already implements Encode and Decode for some rust types: bool,i8,u8,i16,u16,i32,u32,i64,u64,f32,f64,i128,u128,(),Option,Tuple,Vec,[T;N],SmallVec. For structure type, you need to implement Encode and Decode by yourself.
To get a single value (atomic/structure), and you know the exact mapped type, do like this
let value: TagValue<MyType> = client.read_tag(tag).await?;
println!("{:?}",value);
To get the tag type, and you do not care about the data part, do like this:
let value: TagValue<()> = client.read_tag(tag).await?;
println!("{:?}",value.tag_type);
To get the raw bytes whatever the data part holds, do like this:
let value: TagValue<Bytes> = client.read_tag(tag).await?;
To iterate values, and you know the exact mapped type, do like this:
let iter: TagValueTypedIter<MyType> = client.read_tag(tag).await?;
println!("{:?}", iter.tag_type());
while let Some(res) = iter.next(){
println!("{:?}", res);
}
To iterate values, and you do not know the exact mapped type, do like this:
let iter: TagValueIter = client.read_tag(tag).await?;
println!("{:?}", iter.tag_type());
let res = iter.next::<bool>().unwrap();
println!("{:?}", res);
let res = iter.next::<i32>().unwrap();
println!("{:?}", res);
let res = iter.next::<MyType>().unwrap();
println!("{:?}", res);
To read values into collections, do like this:
let value: TagValue<Vec<MyType>> = client.read_tag(tag).await?;
println!("{:?}",value);
You must provide the tag type before you write to a tag. Normally, you can retrieve it by reading the tag. For structure type, you cannot reply on or persist the tag type (or so called structure handle), it might change because it is a calculated value (CRC based).
To write a single value (atomic/structure), do like this:
let value = TagValue {
tag_type: TagType::Dint,
value: 10_i32,
};
client.write_tag(tag, value).await?;
To write raw bytes, do like this:
let bytes:&[u8] = &[0,1,2,3];
let value = TagValue {
tag_type: TagType::Dint,
value: bytes,
};
client.write_tag(tag, value).await?;
To write collections, do like this:
let items: Vec<MyType> = ...;
let value = TagValue {
tag_type: TagType::Dint,
value: items,
};
client.write_tag(tag, value).await?;
For some reasons, TagValue does not work for all type that implements Encode or Decode.
But you can work without TagValue. You can define your own value holder, as long as it implements Encode and Decode.
For simple cases, Tuple should be a good option.
let (tag_type,value):(TagType, i32) = client.read_tag(tag).await?;
client.write_tag(tag, (tag_type, 1_u16, value)).await?;
MIT
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