sergiotarxz/nuttx-apps
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

examples/pwm: Fix PWM range

Browse Source 
This commit fixes the overflow that happens when setting the duty cycle to 100% in the PWM example.
It now correctly passes the value 0xffff rather than 0x0000 when setting the duty cycle to 100 and makes sure that no underflow happens when setting the duty cycle to 0.
This commit is contained in:
Lucas Saavedra Vaz 2023-07-13 11:18:44 -03:00 committed by Xiang Xiao
parent 7cfcb49213
commit 0a7c308f1b
1 changed files with 4 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
examples/pwm/pwm_main.c
View File

@ -523,7 +523,8 @@ int main(int argc, FAR char *argv[])
for (i = 0; i < CONFIG_PWM_NCHANNELS; i++)
{
info.channels[i].channel = g_pwmstate.channels[i];
info.channels[i].duty = b16divi(uitoub16(g_pwmstate.duties[i]), 100);
info.channels[i].duty = g_pwmstate.duties[i] ? \
b16divi(uitoub16(g_pwmstate.duties[i]) - 1, 100) : 0;
printf(" channel: %d duty: %08" PRIx32,
info.channels[i].channel, info.channels[i].duty);
}
@ -531,7 +532,8 @@ int main(int argc, FAR char *argv[])
printf("\n");
#else
info.duty = b16divi(uitoub16(g_pwmstate.duty), 100);
info.duty = g_pwmstate.duty ? \
b16divi(uitoub16(g_pwmstate.duty) - 1, 100) : 0;
# ifdef CONFIG_PWM_PULSECOUNT
info.count = g_pwmstate.count;