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mq3: Add comments to C++ example

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Signed-off-by: Sarah Knepper <sarah.knepper@intel.com>
This commit is contained in:
Sarah Knepper 2015-01-19 12:12:43 -08:00
parent 30989d9b7c
commit 9cda72b077
1 changed files with 5 additions and 0 deletions
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5
examples/mq3.cxx
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@ -46,6 +46,7 @@ sig_handler(int signo)
int int
main(int argc, char **argv) main(int argc, char **argv)
{ {
// Attach gas sensor to A0
sensor = new upm::MQ3(0); sensor = new upm::MQ3(0);
signal(SIGINT, sig_handler); signal(SIGINT, sig_handler);
@ -54,6 +55,10 @@ main(int argc, char **argv)
ctx.runningAverage = 0; ctx.runningAverage = 0;
ctx.averagedOver = 2; ctx.averagedOver = 2;
// Infinite loop, ends when script is cancelled
// Repeatedly, take a sample every 2 milliseconds;
// find the average of 128 samples; and
// print a running graph of the averages using a resolution of 5
while (!is_running) { while (!is_running) {
int len = sensor->getSampledWindow (2, 128, buffer); int len = sensor->getSampledWindow (2, 128, buffer);
if (len) { if (len) {