esp-idf/components/xtensa/xt_trax.c

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// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
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#include <stdio.h>
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#include <stdbool.h>
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#include "esp_err.h"
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#include "xtensa-debug-module.h"
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#include "eri.h"
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bool xt_trax_trace_is_active(void)
{
return eri_read(ERI_TRAX_TRAXSTAT)&TRAXSTAT_TRACT;
}
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static void _xt_trax_start_trace(bool instructions)
{
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uint32_t v;
eri_write(ERI_TRAX_PCMATCHCTRL, 31); //do not stop at any pc match
v=TRAXCTRL_TREN | TRAXCTRL_TMEN | TRAXCTRL_PTOWS | (1<<TRAXCTRL_SMPER_SHIFT);
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if (instructions) {
v|=TRAXCTRL_CNTU;
}
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//Enable trace. This trace has no stop condition and will just keep on running.
eri_write(ERI_TRAX_TRAXCTRL, v);
}
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void xt_trax_start_trace_instructions(void)
{
_xt_trax_start_trace(true);
}
void xt_trax_start_trace_words(void)
{
_xt_trax_start_trace(false);
}
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void xt_trax_trigger_traceend_after_delay(int delay)
{
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eri_write(ERI_TRAX_DELAYCNT, delay);
eri_write(ERI_TRAX_TRAXCTRL, eri_read(ERI_TRAX_TRAXCTRL)|TRAXCTRL_TRSTP);
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//ToDo: This will probably trigger a trace done interrupt. ToDo: Fix, but how? -JD
eri_write(ERI_TRAX_TRAXCTRL, 0);
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}