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pwm steps bugs fixed (#4719)

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fix the divide 0 bug in using "pwm steps" in NSH, and add it's
description
This commit is contained in:
CAI Dongcai
2016-06-05 12:08:31 +02:00
committed by Lorenz Meier
parent eea102f63d
commit f8ff667dde
1 changed files with 5 additions and 2 deletions
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src/systemcmds/pwm/pwm.c
+5 -2
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@@ -75,7 +75,7 @@ usage(const char *reason)
errx(1,
"usage:\n"
"pwm arm|disarm|rate|failsafe|disarmed|min|max|test|info ...\n"
"pwm arm|disarm|rate|failsafe|disarmed|min|max|test|steps|info ...\n"
"\n"
"arm\t\t\t\tArm output\n"
"disarm\t\t\t\tDisarm output\n"
@@ -101,6 +101,9 @@ usage(const char *reason)
"\t[-a]\t\t\tConfigure all outputs\n"
"\t-p <pwm value>\t\tPWM value\n"
"\n"
"steps ...\t\t\tRun 5 steps\n"
"\t[-c <channels>]\t\t(e.g. 1234)\n"
"\n"
"info\t\t\t\tPrint information\n"
"\n"
"\t-v\t\t\tVerbose\n"
@@ -663,7 +666,7 @@ pwm_main(int argc, char *argv[])
} else if (phase == 1) {
/* ramp - depending how steep it is this ramp will look instantaneous on the output */
val = idle + (full - idle) * (phase_maxcount / (float)phase_counter);
val = idle + (full - idle) * ((float)phase_counter / phase_maxcount);
} else {
val = off;