130 lines
4.2 KiB
C
130 lines
4.2 KiB
C
#include <stdio.h>
|
|
|
|
#include "stm32f4xx_hal.h"
|
|
|
|
#include "misc.h"
|
|
#include "mpconfig.h"
|
|
#include "qstr.h"
|
|
#include "obj.h"
|
|
#include "runtime.h"
|
|
#include "extint.h"
|
|
#include "pin.h"
|
|
#include "genhdr/pins.h"
|
|
#include "usrsw.h"
|
|
|
|
#if MICROPY_HW_HAS_SWITCH
|
|
|
|
/// \moduleref pyb
|
|
/// \class Switch - switch object
|
|
///
|
|
/// A Switch object is used to control a push-button switch.
|
|
///
|
|
/// Usage:
|
|
///
|
|
/// sw = pyb.Switch() # create a switch object
|
|
/// sw() # get state (True if pressed, False otherwise)
|
|
/// sw.callback(f) # register a callback to be called when the
|
|
/// # switch is pressed down
|
|
/// sw.callback(None) # remove the callback
|
|
///
|
|
/// Example:
|
|
///
|
|
/// pyb.Switch().callback(lambda: pyb.LED(1).toggle())
|
|
|
|
// this function inits the switch GPIO so that it can be used
|
|
void switch_init0(void) {
|
|
GPIO_InitTypeDef init;
|
|
init.Pin = MICROPY_HW_USRSW_PIN.pin_mask;
|
|
init.Mode = GPIO_MODE_INPUT;
|
|
init.Pull = MICROPY_HW_USRSW_PULL;
|
|
init.Speed = GPIO_SPEED_FAST;
|
|
HAL_GPIO_Init(MICROPY_HW_USRSW_PIN.gpio, &init);
|
|
}
|
|
|
|
int switch_get(void) {
|
|
int val = ((MICROPY_HW_USRSW_PIN.gpio->IDR & MICROPY_HW_USRSW_PIN.pin_mask) != 0);
|
|
return val == MICROPY_HW_USRSW_PRESSED;
|
|
}
|
|
|
|
/******************************************************************************/
|
|
// Micro Python bindings
|
|
|
|
typedef struct _pyb_switch_obj_t {
|
|
mp_obj_base_t base;
|
|
mp_obj_t callback;
|
|
} pyb_switch_obj_t;
|
|
|
|
STATIC pyb_switch_obj_t pyb_switch_obj;
|
|
|
|
void pyb_switch_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t self_in, mp_print_kind_t kind) {
|
|
print(env, "Switch()");
|
|
}
|
|
|
|
/// \classmethod \constructor()
|
|
/// Create and return a switch object.
|
|
STATIC mp_obj_t pyb_switch_make_new(mp_obj_t type_in, uint n_args, uint n_kw, const mp_obj_t *args) {
|
|
// check arguments
|
|
mp_arg_check_num(n_args, n_kw, 0, 0, false);
|
|
|
|
// init the switch object
|
|
pyb_switch_obj.base.type = &pyb_switch_type;
|
|
|
|
// No need to clear the callback member: if it's already been set and registered
|
|
// with extint then we don't want to reset that behaviour. If it hasn't been set,
|
|
// then no extint will be called until it is set via the callback method.
|
|
|
|
// return static switch object
|
|
return (mp_obj_t)&pyb_switch_obj;
|
|
}
|
|
|
|
/// \method \call()
|
|
/// Return the switch state: `True` if pressed down, `False` otherwise.
|
|
mp_obj_t pyb_switch_call(mp_obj_t self_in, uint n_args, uint n_kw, const mp_obj_t *args) {
|
|
// get switch state
|
|
mp_arg_check_num(n_args, n_kw, 0, 0, false);
|
|
return switch_get() ? mp_const_true : mp_const_false;
|
|
}
|
|
|
|
STATIC mp_obj_t switch_callback(mp_obj_t line) {
|
|
if (pyb_switch_obj.callback != mp_const_none) {
|
|
mp_call_function_0(pyb_switch_obj.callback);
|
|
}
|
|
return mp_const_none;
|
|
}
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_1(switch_callback_obj, switch_callback);
|
|
|
|
/// \method callback(fun)
|
|
/// Register the given function to be called when the switch is pressed down.
|
|
/// If `fun` is `None`, then it disables the callback.
|
|
mp_obj_t pyb_switch_callback(mp_obj_t self_in, mp_obj_t callback) {
|
|
pyb_switch_obj_t *self = self_in;
|
|
self->callback = callback;
|
|
// Init the EXTI each time this function is called, since the EXTI
|
|
// may have been disabled by an exception in the interrupt, or the
|
|
// user disabling the line explicitly.
|
|
extint_register((mp_obj_t)&MICROPY_HW_USRSW_PIN,
|
|
MICROPY_HW_USRSW_EXTI_MODE,
|
|
MICROPY_HW_USRSW_PULL,
|
|
callback == mp_const_none ? mp_const_none : (mp_obj_t)&switch_callback_obj,
|
|
true, NULL);
|
|
return mp_const_none;
|
|
}
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_2(pyb_switch_callback_obj, pyb_switch_callback);
|
|
|
|
STATIC const mp_map_elem_t pyb_switch_locals_dict_table[] = {
|
|
{ MP_OBJ_NEW_QSTR(MP_QSTR_callback), (mp_obj_t)&pyb_switch_callback_obj },
|
|
};
|
|
|
|
STATIC MP_DEFINE_CONST_DICT(pyb_switch_locals_dict, pyb_switch_locals_dict_table);
|
|
|
|
const mp_obj_type_t pyb_switch_type = {
|
|
{ &mp_type_type },
|
|
.name = MP_QSTR_Switch,
|
|
.print = pyb_switch_print,
|
|
.make_new = pyb_switch_make_new,
|
|
.call = pyb_switch_call,
|
|
.locals_dict = (mp_obj_t)&pyb_switch_locals_dict,
|
|
};
|
|
|
|
#endif // MICROPY_HW_HAS_SWITCH
|