mirror of https://github.com/joan2937/pigpio
122 lines
2.9 KiB
C
122 lines
2.9 KiB
C
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/*
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This is free and unencumbered software released into the public domain.
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Anyone is free to copy, modify, publish, use, compile, sell, or
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distribute this software, either in source code form or as a compiled
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binary, for any purpose, commercial or non-commercial, and by any
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means.
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In jurisdictions that recognize copyright laws, the author or authors
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of this software dedicate any and all copyright interest in the
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software to the public domain. We make this dedication for the benefit
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of the public at large and to the detriment of our heirs and
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successors. We intend this dedication to be an overt act of
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relinquishment in perpetuity of all present and future rights to this
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software under copyright law.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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OTHER DEALINGS IN THE SOFTWARE.
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For more information, please refer to <http://unlicense.org/>
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*/
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/*
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This version is for pigpio version 3+
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <unistd.h>
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#include <time.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/time.h>
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#include <fcntl.h>
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#include "pigpio.h"
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/*
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This software converts pigpio notification reports
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into a VCD format understood by GTKWave.
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*/
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#define RS (sizeof(gpioReport_t))
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static char * timeStamp()
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{
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static char buf[32];
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struct timeval now;
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struct tm tmp;
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gettimeofday(&now, NULL);
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localtime_r(&now.tv_sec, &tmp);
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strftime(buf, sizeof(buf), "%F %T", &tmp);
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return buf;
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}
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int symbol(int bit)
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{
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if (bit < 26) return ('A' + bit);
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else return ('a' + bit - 26);
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}
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int main(int argc, char * argv[])
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{
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int b, r, v;
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uint32_t t0;
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uint32_t lastLevel, changed;
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gpioReport_t report;
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r=read(STDIN_FILENO, &report, RS);
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if (r != RS) exit(-1);
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printf("$date %s $end\n", timeStamp());
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printf("$version pig2vcd V1 $end\n");
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printf("$timescale 1 us $end\n");
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printf("$scope module top $end\n");
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for (b=0; b<32; b++)
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printf("$var wire 1 %c %d $end\n", symbol(b), b);
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printf("$upscope $end\n");
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printf("$enddefinitions $end\n");
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t0 = report.tick;
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lastLevel =0;
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while ((r=read(STDIN_FILENO, &report, RS)) == RS)
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{
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if (report.level != lastLevel)
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{
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printf("#%u\n", report.tick - t0);
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changed = report.level ^ lastLevel;
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lastLevel = report.level;
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for (b=0; b<32; b++)
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{
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if (changed & (1<<b))
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{
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if (report.level & (1<<b)) v='1'; else v='0';
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printf("%c%c\n", v, symbol(b));
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}
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}
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}
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}
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return 0;
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}
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