93 lines
2.1 KiB
C
93 lines
2.1 KiB
C
/*
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* data_recorder.c
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*
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* Record simulator data to a file in real-time.
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*
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*/
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#include "simulator.h"
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#include "data_recorder.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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static FILE *file;
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#define MAX_PINS 100
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static int32_t values[MAX_PINS]; ///< Pin and value states
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static int pin_count; ///< Number of pins we emit
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static void emit_log_data(void);
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static void recorder_close(void) {
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if (!file) return;
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// force last line to emit
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emit_log_data();
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fflush(file);
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fclose(file);
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file = NULL;
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}
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void recorder_init(const char* filename) {
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sim_assert( ! file, "Recorder already initialized");
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file = fopen(filename, "w");
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sim_assert(file, "record_init: failed to create file");
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time_t t = time(NULL);
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fprintf(file, "# Teacup_Firmware simulator v1.0\n");
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fprintf(file, "# Recorded %s\n", asctime(localtime(&t)));
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fprintf(file, "#\n# Tips:\n");
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fprintf(file, "# * Plot the actual points traveled with gnuplot\n");
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fprintf(file, "# gnuplot --persist -e \"set pointsize 0.01; plot '%s' u 2:3:1 with points\"\n", filename);
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fprintf(file, "#\n");
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fflush(file);
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atexit((void*)recorder_close);
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}
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void add_trace_var(const char* name, int pin) {
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sim_assert(pin < MAX_PINS, "pin number invalid");
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if (file) {
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fprintf(file, "# %d - %s\n", pin+1, name);
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fflush(file);
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}
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if (pin >= pin_count)
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pin_count = pin + 1;
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}
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static uint64_t prev_t;
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static void emit_log_data(void) {
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if (!file) return;
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// Naive format: each line contains all values, beginning with the time
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fprintf(file, "%lu", prev_t/1000); // microseconds
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for (int i = 0; i < pin_count; i++)
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fprintf(file, " %u", values[i]);
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fprintf(file, "\n");
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fflush(file);
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}
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// Record a value signal change
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void record_pin(int pin, int32_t state, uint64_t t) {
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if (state == values[pin] && t == prev_t ) return;
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sim_assert(pin < MAX_PINS, "pin number invalid");
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emit_log_data();
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prev_t = t;
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values[pin] = state;
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}
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void record_comment(const char * msg) {
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if (!file) return;
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fprintf(file, "# %s\n", msg);
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fflush(file);
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}
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void record_raw(const char * msg) {
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if (!file) return;
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fprintf(file, "%s", msg);
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fflush(file);
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}
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