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pwm.c: Must write period before duty_cycle to avoid sysfs error

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Signed-off-by: Henry Bruce <henry.bruce@intel.com>
This commit is contained in:
Henry Bruce
2014-11-19 16:55:48 -08:00
committed by Thomas Ingleby
parent 41bbc0b86b
commit 7aea3459a9
1 changed files with 8 additions and 8 deletions
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16
src/pwm/pwm.c
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@@ -386,15 +386,15 @@ mraa_pwm_config_ms(mraa_pwm_context dev, int ms ,float ms_float)
int old_dutycycle, old_period, status; int old_dutycycle, old_period, status;
old_dutycycle = mraa_pwm_read_duty(dev); old_dutycycle = mraa_pwm_read_duty(dev);
old_period = mraa_pwm_read_period(dev); old_period = mraa_pwm_read_period(dev);
status = mraa_pwm_write_duty(dev, 0);
if (status != MRAA_SUCCESS) {
return status;
}
status = mraa_pwm_period_us(dev, ms*1000); status = mraa_pwm_period_us(dev, ms*1000);
if (status != MRAA_SUCCESS) { if (status != MRAA_SUCCESS) {
mraa_pwm_write_duty(dev, old_dutycycle); mraa_pwm_write_duty(dev, old_dutycycle);
return status; return status;
} }
status = mraa_pwm_write_duty(dev, 0);
if (status != MRAA_SUCCESS) {
return status;
}
status = mraa_pwm_pulsewidth_us(dev, ms_float*1000); status = mraa_pwm_pulsewidth_us(dev, ms_float*1000);
if (status != MRAA_SUCCESS) { if (status != MRAA_SUCCESS) {
mraa_pwm_write_duty(dev, old_dutycycle); mraa_pwm_write_duty(dev, old_dutycycle);
@@ -410,15 +410,15 @@ mraa_pwm_config_percent(mraa_pwm_context dev, int ms ,float percentage)
int old_dutycycle, old_period, status; int old_dutycycle, old_period, status;
old_dutycycle = mraa_pwm_read_duty(dev); old_dutycycle = mraa_pwm_read_duty(dev);
old_period = mraa_pwm_read_period(dev); old_period = mraa_pwm_read_period(dev);
status = mraa_pwm_write_duty(dev, 0);
if (status != MRAA_SUCCESS) {
return status;
}
status = mraa_pwm_period_us(dev, ms*1000); status = mraa_pwm_period_us(dev, ms*1000);
if (status != MRAA_SUCCESS) { if (status != MRAA_SUCCESS) {
mraa_pwm_write_duty(dev, old_dutycycle); mraa_pwm_write_duty(dev, old_dutycycle);
return status; return status;
} }
status = mraa_pwm_write_duty(dev, 0);
if (status != MRAA_SUCCESS) {
return status;
}
status = mraa_pwm_pulsewidth_us(dev, (ms*1000)*percentage); status = mraa_pwm_pulsewidth_us(dev, (ms*1000)*percentage);
if (status != MRAA_SUCCESS) { if (status != MRAA_SUCCESS) {
mraa_pwm_write_duty(dev, old_dutycycle); mraa_pwm_write_duty(dev, old_dutycycle);