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/*
* Copyright 2020 Birte Kristina Friesel
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#ifndef PTALOG_H
#define PTALOG_H
#include <stdlib.h>
#include "driver/stdout.h"
#ifdef PTALOG_GPIO
#include "driver/gpio.h"
#if defined(PTALOG_GPIO_BEFORE) || defined(PTALOG_GPIO_BAR)
#include "arch.h"
#endif
#endif
#ifdef PTALOG_TIMING
#include "driver/counter.h"
#endif
class PTALog {
private:
PTALog(const PTALog& copy);
#ifdef PTALOG_GPIO
uint8_t sync_pin;
#endif
public:
typedef struct {
uint8_t transition_id;
#ifdef PTALOG_TIMING
counter_value_t timer;
counter_overflow_t overflow;
counter_value_t prev_state_timer;
counter_overflow_t prev_state_overflow;
#endif
#ifdef PTALOG_WITH_RETURNVALUES
uint16_t return_value;
#endif
} log_entry;
int const max_entry = 15;
log_entry log[16];
uint8_t log_index;
#ifdef PTALOG_GPIO
PTALog(uint8_t pin_number) : sync_pin(pin_number), log_index(0) {}
#else
PTALog() : log_index(0) {}
#endif
void passTransition(uint8_t transition_id)
{
log[log_index].transition_id = transition_id;
if (log_index < max_entry) {
log_index++;
}
}
#ifdef PTALOG_TIMING
/*
* This function is meant to estimate the overhead of counter.start()
* and counter.stop(). It immediately restarts the counter to ensure that
* state durations are captured accurately.
* This means that the overflow value is unusable. We assume that there
* are no overflows in this short time span.
*/
inline void passNop()
{
counter.start();
counter.stop();
counter.start(); // .value is kept until .stop
kout << "[PTA] nop=" << counter.value << "/" << 0 << endl;
}
#endif
void reset()
{
log_index = 0;
}
void startBenchmark(uint8_t id)
{
kout << "[PTA] benchmark start, id=" << dec << id << endl;
#ifdef PTALOG_GPIO
gpio.output(sync_pin);
#endif
}
void stopBenchmark()
{
#ifdef PTALOG_TIMING
counter.stop();
kout << "[PTA] benchmark stop, cycles=" << counter.value << "/" << counter.overflow << endl;
#else
kout << "[PTA] benchmark stop" << endl;
#endif
}
void dump(uint16_t trace_id)
{
kout << "[PTA] trace=" << dec << trace_id << " count=" << log_index << endl;
for (uint8_t i = 0; i < log_index; i++) {
kout << "[PTA] transition=" << log[i].transition_id;
#ifdef PTALOG_TIMING
kout << " prevcycles=" << log[i].prev_state_timer << "/" << log[i].prev_state_overflow;
kout << " cycles=" << log[i].timer << "/" << log[i].overflow;
#endif
#ifdef PTALOG_WITH_RETURNVALUES
kout << " return=" << log[i].return_value;
#endif
kout << endl;
}
}
#ifdef PTALOG_GPIO_BAR
void startTransition(char const *code, uint8_t code_length)
{
counter.stop();
log[log_index - 1].prev_state_timer = counter.value;
log[log_index - 1].prev_state_overflow = counter.overflow;
// Quiet zone (must last at least 10x longer than a module)
arch.sleep_ms(60);
for (uint8_t byte = 0; byte < code_length; byte++) {
for (uint16_t mask = 0x01; mask <= 0x80; mask <<= 1) {
// a single module, which is part of a bar
gpio.write(sync_pin, code[byte] & mask ? 1 : 0);
arch.sleep_ms(5);
}
}
gpio.write(sync_pin, 0);
// Quiet zone
arch.sleep_ms(60);
counter.start();
}
#else
inline void startTransition()
{
#ifdef PTALOG_GPIO_BEFORE
gpio.write(sync_pin, 1);
arch.sleep_ms(10);
gpio.write(sync_pin, 0);
arch.sleep_ms(10);
#endif
#ifdef PTALOG_TIMING
counter.stop();
log[log_index - 1].prev_state_timer = counter.value;
log[log_index - 1].prev_state_overflow = counter.overflow;
counter.start();
#endif
#if defined(PTALOG_GPIO) && !defined(PTALOG_GPIO_BEFORE)
gpio.write(sync_pin, 1);
#endif
}
#endif
#ifdef PTALOG_WITH_RETURNVALUES
inline void logReturn(uint16_t ret)
{
log[log_index - 1].return_value = ret;
}
#endif
inline void stopTransition()
{
#if defined(PTALOG_GPIO) && !defined(PTALOG_GPIO_BEFORE) && !defined(PTALOG_GPIO_BAR)
gpio.write(sync_pin, 0);
#endif
#ifdef PTALOG_TIMING
counter.stop();
log[log_index - 1].timer = counter.value;
log[log_index - 1].overflow = counter.overflow;
counter.start();
#endif
}
};
#endif
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