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new_conf_req

rtlp_lib

Function new_conf_req 

Source 
pub fn new_conf_req(
    bytes: impl Into<Vec<u8>>,
) -> Result<Box<dyn ConfigurationRequest>, TlpError>
Expand description

Obtain Configuration Request trait from bytes in vector as dyn.

Note: The bytes slice must contain the full DW1+DW2 payload (8 bytes). TlpPacket::data() returns exactly those bytes when the packet was constructed from a complete 12-byte configuration request header.

§Examples

use rtlp_lib::{TlpPacket, TlpMode, ConfigurationRequest, new_conf_req};

// 12 bytes: DW0 (ConfType0WriteReq) + DW1 (req_id, tag, BE) + DW2 (bus/dev/func/reg)
// DW0: 0x44=ConfType0WriteReq, length=1
// DW1: req_id=0x0001, tag=0x00, BE=0x0F
// DW2: bus=0xC2, device=0x10>>3=1, func=0, ext_reg=0, reg=4
let bytes = vec![
    0x44, 0x00, 0x00, 0x01,  // DW0
    0x00, 0x01, 0x00, 0x0F,  // DW1
    0xC2, 0x08, 0x00, 0x10,  // DW2
];
let tlp = TlpPacket::new(bytes, TlpMode::NonFlit).unwrap();

// data() returns DW1+DW2 (8 bytes) — exactly what ConfigRequest needs
// data() returns &[u8] — pass it directly, no .to_vec() needed
let config_req: Box<dyn ConfigurationRequest> = new_conf_req(tlp.data()).unwrap();
assert_eq!(config_req.bus_nr(), 0xC2);

§Errors