probe-rs 0.31.0

//! This example demonstrates how to do raw DP register access on multidrop systems.

use anyhow::Result;
use probe_rs::{
    architecture::arm::{
        dp::{DpAddress, DpRegisterAddress},
        sequences::DefaultArmSequence,
    },
    probe::{Probe, list::Lister},
};

fn main() -> Result<()> {
    env_logger::init();

    // Get a list of all available debug probes.

    let probe_lister = Lister::new();

    let probes = probe_lister.list_all();

    // Use the first probe found.
    let mut probe: Probe = probes[0].open()?;

    // Specify the multidrop DP address of the first core,
    // this is used for the initial connection.
    let core0 = DpAddress::Multidrop(0x01002927);

    probe.set_speed(100)?;
    probe.attach_to_unspecified()?;
    let mut iface = probe
        .try_into_arm_debug_interface(DefaultArmSequence::create())
        .map_err(|(_probe, err)| err)?;

    iface.select_debug_port(core0)?;

    // This is an example on how to do raw DP register access with multidrop.
    // This reads DPIDR and TARGETID of both cores in a RP2040. This chip is
    // unconventional because each core has its own DP.

    let core1 = DpAddress::Multidrop(0x11002927);
    const DPIDR: DpRegisterAddress = DpRegisterAddress {
        address: 0x0,
        bank: Some(0x0),
    };
    const TARGETID: DpRegisterAddress = DpRegisterAddress {
        address: 0x4,
        bank: Some(0x2),
    };

    println!(
        "core0 DPIDR:    {:08x}",
        iface.read_raw_dp_register(core0, DPIDR)?
    );
    println!(
        "core0 TARGETID: {:08x}",
        iface.read_raw_dp_register(core0, TARGETID)?
    );
    println!(
        "core1 DPIDR:    {:08x}",
        iface.read_raw_dp_register(core1, DPIDR)?
    );
    println!(
        "core1 TARGETID: {:08x}",
        iface.read_raw_dp_register(core1, TARGETID)?
    );

    Ok(())
}