1.1 --- a/c++/lpt-signal-generator/lpt.cpp	Sun Jun 11 12:51:19 2017 +0200
     1.2 +++ b/c++/lpt-signal-generator/lpt.cpp	Sun Jun 11 13:07:53 2017 +0200
     1.3 @@ -44,7 +44,12 @@
     1.4  // so "duration" means total sleep time
     1.5  
     1.6  // TODO: data types revision
     1.7 +// TODO: time units s, μs, ns – naming convention / unification
     1.8  
     1.9 +/**
    1.10 + * generates square wave signal on a parallel port pin with given frequency and duty cycle
    1.11 + * mode info: https://blog.frantovo.cz/c/358/Paraleln%C3%AD%20port%20jako%20gener%C3%A1tor%20sign%C3%A1lu
    1.12 + */
    1.13  int main() {
    1.14    //cout << "LPT!" << endl; // same as using printf → breaks all folllowing wprintf() calls, see note above
    1.15  
    1.16 @@ -98,7 +103,7 @@
    1.17    auto calibrationCycles = 10000;
    1.18    auto calibrationSleepTime = 10;
    1.19  
    1.20 -  for (auto i = calibrationCycles; i > 0;  i--) {
    1.21 +  for (auto i = calibrationCycles; i > 0; i--) {
    1.22      outb(0b00000000, addr);
    1.23      usleep(calibrationSleepTime);
    1.24      outb(0b00000000, addr);