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Ignore single channels during PWM output

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This commit is contained in:
Holger Steinhaus 2014-08-26 14:34:14 +02:00
parent 19fa79dcb1
commit 87b2375be4
3 changed files with 11 additions and 2 deletions
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5
src/drivers/drv_pwm_output.h
View File

@ -94,6 +94,11 @@ __BEGIN_DECLS
*/
#define PWM_LOWEST_MAX 1700
/**
* Do not output a channel with this value
*/
#define PWM_IGNORE_THIS_CHANNEL UINT16_MAX
/**
* Servo output signal type, value is actual servo output pulse
* width in microseconds.

4
src/drivers/px4fmu/fmu.cpp
View File

@ -1272,7 +1272,9 @@ PX4FMU::write(file *filp, const char *buffer, size_t len)
memcpy(values, buffer, count * 2);
for (uint8_t i = 0; i < count; i++) {
up_pwm_servo_set(i, values[i]);
if (values[i] != PWM_IGNORE_THIS_CHANNEL) {
up_pwm_servo_set(i, values[i]);
}
}
return count * 2;

4
src/modules/px4iofirmware/registers.c
View File

@ -285,7 +285,9 @@ registers_set(uint8_t page, uint8_t offset, const uint16_t *values, unsigned num
while ((offset < PX4IO_CONTROL_CHANNELS) && (num_values > 0)) {
/* XXX range-check value? */
r_page_servos[offset] = *values;
if (*values != PWM_IGNORE_THIS_CHANNEL) {
r_page_servos[offset] = *values;
}
offset++;
num_values--;