diff options
| author | Christian Pointner <equinox@spreadspace.org> | 2014-05-20 03:17:50 +0200 |
|---|---|---|
| committer | Christian Pointner <equinox@spreadspace.org> | 2014-05-20 03:17:50 +0200 |
| commit | fbf5b3887cd720430477729e2505951e7eefdcd5 (patch) | |
| tree | a0d0f18e80b48bb934e26c642ef90e57a7f55cd1 /tube-rotator | |
| parent | added conversion from speed value to rpm (diff) | |
prevent stepper from being reastarted if already running
Diffstat (limited to 'tube-rotator')
| -rw-r--r-- | tube-rotator/stepper.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/tube-rotator/stepper.c b/tube-rotator/stepper.c index a498b43..2de1fc2 100644 --- a/tube-rotator/stepper.c +++ b/tube-rotator/stepper.c @@ -49,6 +49,7 @@ uint8_t step_table [] = volatile uint16_t target_speed; uint16_t current_speed; +uint8_t running; void stepper_init(void) { @@ -60,6 +61,8 @@ void stepper_init(void) void stepper_start(void) { + if(running) return; + current_speed = STEPPER_SPEED_MIN; STEPPER_PORT |= (1<<STEPPER_ENABLE_A_BIT) | (1<<STEPPER_ENABLE_B_BIT); TCNT1 = 0; @@ -67,6 +70,7 @@ void stepper_start(void) TCCR1A = 0; // prescaler 1:64, WGM = 4 (CTC) TCCR1B = 1<<WGM12 | 1<<CS11 | 1<<CS10; // TIMSK1 = 1<<OCIE1A; + running = 1; } void stepper_stop(void) @@ -74,6 +78,7 @@ void stepper_stop(void) STEPPER_PORT &= ~(0xF << STEPPER_FIRST_BIT | 1<<STEPPER_ENABLE_A_BIT | 1<<STEPPER_ENABLE_B_BIT); TCCR1B = 0; // no clock source TIMSK1 = 0; // disable timer interrupt + running = 0; } static inline void stepper_handle(void) |