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use crate::*;
use bitvec::prelude::*;
/// Trait for JTAG adapters that can automatically follow the JTAG state
/// machine
pub trait StateTrackingJTAGAdapter {
/// Execute the given JTAG action and return its result.
///
/// The following actions are valid for this type of adapter:
/// * [JTAGAction::DelayNS]
/// * [JTAGAction::SetClkSpeed]
/// * [JTAGAction::ResetToTLR]
/// * [JTAGAction::GoViaStates]
/// * [JTAGAction::ShiftBits]
fn execute_stjtag_action(&mut self, action: &JTAGAction) -> JTAGOutput;
}
/// Automatically turn [ChunkShifterJTAGAdapter] into a [StateTrackingJTAGAdapter]
impl<T: StateTrackingJTAGAdapter + AsMut<JTAGAdapterState>> JTAGAdapter for T {
fn execute_actions(&mut self, actions: &[JTAGAction]) -> Vec<JTAGOutput> {
actions
.into_iter()
.map(|action| {
match action {
JTAGAction::DelayNS(..)
| JTAGAction::SetClkSpeed(..)
| JTAGAction::ResetToTLR
| JTAGAction::GoViaStates(..)
| JTAGAction::ShiftBits { .. } => self.execute_stjtag_action(action),
JTAGAction::ShiftIR { ir, capture, pause } => {
self.execute_stjtag_action(&JTAGAction::GoViaStates(vec![
JTAGState::ShiftIR,
]));
let ret = self.execute_stjtag_action(&JTAGAction::ShiftBits {
bits_tdi: ir.clone(),
capture: *capture,
tms_exit: true,
});
if *pause {
self.execute_stjtag_action(&JTAGAction::GoViaStates(vec![
JTAGState::PauseIR,
]));
} else {
self.execute_stjtag_action(&JTAGAction::GoViaStates(vec![
JTAGState::RunTestIdle,
]));
}
ret
}
JTAGAction::ShiftDR { dr, capture, pause } => {
self.execute_stjtag_action(&JTAGAction::GoViaStates(vec![
JTAGState::ShiftDR,
]));
let ret = self.execute_stjtag_action(&JTAGAction::ShiftBits {
bits_tdi: dr.clone(),
capture: *capture,
tms_exit: true,
});
if *pause {
self.execute_stjtag_action(&JTAGAction::GoViaStates(vec![
JTAGState::PauseDR,
]));
} else {
self.execute_stjtag_action(&JTAGAction::GoViaStates(vec![
JTAGState::RunTestIdle,
]));
}
ret
}
// XXX need to track stuff for optimization here
JTAGAction::SetIR(ir) => {
self.execute_stjtag_action(&JTAGAction::GoViaStates(vec![
JTAGState::ShiftIR,
]));
self.execute_stjtag_action(&JTAGAction::ShiftBits {
bits_tdi: ir.clone(),
capture: false,
tms_exit: true,
});
self.execute_stjtag_action(&JTAGAction::GoViaStates(vec![
JTAGState::RunTestIdle,
]));
JTAGOutput::NoData
}
JTAGAction::ReadReg { ir, drlen } => {
self.execute_stjtag_action(&JTAGAction::GoViaStates(vec![
JTAGState::ShiftIR,
]));
self.execute_stjtag_action(&JTAGAction::ShiftBits {
bits_tdi: ir.clone(),
capture: false,
tms_exit: true,
});
self.execute_stjtag_action(&JTAGAction::GoViaStates(vec![
JTAGState::ShiftDR,
]));
let ret = self.execute_stjtag_action(&JTAGAction::ShiftBits {
bits_tdi: BitVec::repeat(false, *drlen),
capture: true,
tms_exit: true,
});
self.execute_stjtag_action(&JTAGAction::GoViaStates(vec![
JTAGState::RunTestIdle,
]));
ret
}
JTAGAction::WriteReg { ir, dr } => {
self.execute_stjtag_action(&JTAGAction::GoViaStates(vec![
JTAGState::ShiftIR,
]));
self.execute_stjtag_action(&JTAGAction::ShiftBits {
bits_tdi: ir.clone(),
capture: false,
tms_exit: true,
});
self.execute_stjtag_action(&JTAGAction::GoViaStates(vec![
JTAGState::ShiftDR,
]));
self.execute_stjtag_action(&JTAGAction::ShiftBits {
bits_tdi: dr.clone(),
capture: false,
tms_exit: true,
});
self.execute_stjtag_action(&JTAGAction::GoViaStates(vec![
JTAGState::RunTestIdle,
]));
JTAGOutput::NoData
}
}
})
.collect()
}
}