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endstop: No need to store pin_value 

The pin_value can be stored in the existing flags variable.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2017-03-05 14:10:19 -05:00
parent 342a7096ea
commit 8d6ecd9af8
1 changed files with 5 additions and 5 deletions
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10
src/endstop.c
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@ -16,10 +16,10 @@ struct end_stop {
uint32_t rest_time; uint32_t rest_time;
struct stepper *stepper; struct stepper *stepper;
struct gpio_in pin; struct gpio_in pin;
uint8_t pin_value, flags; uint8_t flags;
}; };
enum { ESF_HOMING=1, ESF_REPORT=2 }; enum { ESF_PIN_HIGH=1<<0, ESF_HOMING=1<<1, ESF_REPORT=1<<2 };
// Timer callback for an end stop // Timer callback for an end stop
static uint_fast8_t static uint_fast8_t
@ -27,7 +27,8 @@ end_stop_event(struct timer *t)
{ {
struct end_stop *e = container_of(t, struct end_stop, time); struct end_stop *e = container_of(t, struct end_stop, time);
uint8_t val = gpio_in_read(e->pin); uint8_t val = gpio_in_read(e->pin);
if (val != e->pin_value) { if ((val ? ~e->flags : e->flags) & ESF_PIN_HIGH) {
// No match - reschedule for the next attempt
e->time.waketime += e->rest_time; e->time.waketime += e->rest_time;
return SF_RESCHEDULE; return SF_RESCHEDULE;
} }
@ -62,8 +63,7 @@ command_end_stop_home(uint32_t *args)
e->flags = 0; e->flags = 0;
return; return;
} }
e->pin_value = args[3]; e->flags = ESF_HOMING | (args[3] ? ESF_PIN_HIGH : 0);
e->flags = ESF_HOMING;
sched_timer(&e->time); sched_timer(&e->time);
} }
DECL_COMMAND(command_end_stop_home, DECL_COMMAND(command_end_stop_home,