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pwmcmds: Export the maximum PWM value

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Instead of assuming the maximum PWM value is 255, export a constant
from the firmware to the host with the maximum value.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2017-05-07 17:33:45 -04:00
parent a361b92184
commit 5c4cc0d646
5 changed files with 23 additions and 14 deletions
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9
src/gpiocmds.c
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@ -90,6 +90,9 @@ DECL_COMMAND(command_set_digital_out, "set_digital_out pin=%u value=%c");
* Soft PWM output pins
****************************************************************/
#define MAX_SOFT_PWM 255
DECL_CONSTANT(SOFT_PWM_MAX, MAX_SOFT_PWM);
struct soft_pwm_s {
struct timer timer;
uint32_t on_duration, off_duration, end_time;
@ -159,7 +162,7 @@ command_config_soft_pwm_out(uint32_t *args)
struct soft_pwm_s *s = oid_alloc(args[0], command_config_soft_pwm_out
, sizeof(*s));
s->cycle_time = args[2];
s->pulse_time = s->cycle_time / 255;
s->pulse_time = s->cycle_time / MAX_SOFT_PWM;
s->default_value = !!args[3];
s->max_duration = args[4];
s->flags = s->default_value ? SPF_ON : 0;
@ -177,7 +180,7 @@ command_schedule_soft_pwm_out(uint32_t *args)
uint8_t value = args[2];
uint8_t next_flags = SPF_CHECK_END | SPF_HAVE_NEXT;
uint32_t next_on_duration, next_off_duration;
if (value == 0 || value == 255) {
if (value == 0 || value == MAX_SOFT_PWM) {
next_on_duration = next_off_duration = 0;
next_flags |= value ? SPF_NEXT_ON : 0;
if (!!value != s->default_value && s->max_duration)
@ -208,7 +211,7 @@ command_schedule_soft_pwm_out(uint32_t *args)
irq_enable();
}
DECL_COMMAND(command_schedule_soft_pwm_out,
"schedule_soft_pwm_out oid=%c clock=%u value=%c");
"schedule_soft_pwm_out oid=%c clock=%u value=%hu");
static void
soft_pwm_shutdown(void)