djsundog/circuitpython
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Add GamePadShift for handling shift-register-based buttons

Browse Source
This commit is contained in:
Radomir Dopieralski 2019-04-10 20:42:21 +02:00
parent 29615dae06
commit 6ff4e0ecb0
6 changed files with 119 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

68
shared-bindings/gamepad/GamePad.c
View File

@ -35,6 +35,15 @@
#include "supervisor/shared/translate.h"
#include "GamePad.h"
digitalio_digitalinout_obj_t *validate_pin(mp_obj_t obj) {
if (!MP_OBJ_IS_TYPE(obj, &digitalio_digitalinout_type)) {
mp_raise_TypeError(translate("expected a DigitalInOut"));
}
digitalio_digitalinout_obj_t *pin = MP_OBJ_TO_PTR(obj);
raise_error_if_deinited(
common_hal_digitalio_digitalinout_deinited(pin));
return pin;
}
//| .. currentmodule:: gamepad
//|
@ -100,19 +109,52 @@ STATIC mp_obj_t gamepad_make_new(const mp_obj_type_t *type, size_t n_args,
mp_raise_TypeError(translate("too many arguments"));
}
for (size_t i = 0; i < n_args; ++i) {
if (!MP_OBJ_IS_TYPE(args[i], &digitalio_digitalinout_type)) {
mp_raise_TypeError(translate("expected a DigitalInOut"));
}
digitalio_digitalinout_obj_t *pin = MP_OBJ_TO_PTR(args[i]);
raise_error_if_deinited(
common_hal_digitalio_digitalinout_deinited(pin));
validate_pin(args[i]);
}
if (!MP_STATE_VM(gamepad_singleton)) {
gamepad_obj_t* gamepad_singleton = m_new_obj(gamepad_obj_t);
gamepad_singleton->base.type = &gamepad_type;
MP_STATE_VM(gamepad_singleton) = gc_make_long_lived(gamepad_singleton);
}
gamepad_init(n_args, args);
gamepad_init_pins(n_args, args);
return MP_OBJ_FROM_PTR(MP_STATE_VM(gamepad_singleton));
}
//| .. class:: GamePadShift(data, clock, latch)
//|
//| Initializes button scanning routines.
//|
//| The ``data``, ``clock`` and ``latch`` parameters are ``DigitalInOut``
//| objects connected to the shift register controlling the buttons.
//|
//| They button presses are accumulated, until the ``get_pressed`` method
//| is called, at which point the button state is cleared, and the new
//| button presses start to be recorded.
//|
STATIC mp_obj_t gamepadshift_make_new(const mp_obj_type_t *type, size_t n_args,
const mp_obj_t *pos_args, mp_map_t *kw_args) {
enum { ARG_data, ARG_clock, ARG_latch };
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_data, MP_ARG_REQUIRED | MP_ARG_OBJ },
{ MP_QSTR_clock, MP_ARG_REQUIRED | MP_ARG_OBJ},
{ MP_QSTR_latch, MP_ARG_REQUIRED | MP_ARG_OBJ},
};
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args),
allowed_args, args);
digitalio_digitalinout_obj_t *data_pin = validate_pin(args[ARG_data].u_obj);
digitalio_digitalinout_obj_t *clock_pin = validate_pin(args[ARG_clock].u_obj);
digitalio_digitalinout_obj_t *latch_pin = validate_pin(args[ARG_latch].u_obj);
if (!MP_STATE_VM(gamepad_singleton)) {
gamepad_obj_t* gamepad_singleton = m_new_obj(gamepad_obj_t);
gamepad_singleton->base.type = &gamepad_type;
MP_STATE_VM(gamepad_singleton) = gc_make_long_lived(gamepad_singleton);
}
gamepad_init_shift(data_pin, clock_pin, latch_pin);
return MP_OBJ_FROM_PTR(MP_STATE_VM(gamepad_singleton));
}
@ -158,3 +200,15 @@ const mp_obj_type_t gamepad_type = {
.make_new = gamepad_make_new,
.locals_dict = (mp_obj_dict_t*)&gamepad_locals_dict,
};
STATIC const mp_rom_map_elem_t gamepadshift_locals_dict_table[] = {
{ MP_OBJ_NEW_QSTR(MP_QSTR_get_pressed), MP_ROM_PTR(&gamepad_get_pressed_obj)},
{ MP_OBJ_NEW_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&gamepad_deinit_obj)},
};
STATIC MP_DEFINE_CONST_DICT(gamepadshift_locals_dict, gamepadshift_locals_dict_table);
const mp_obj_type_t gamepadshift_type = {
{ &mp_type_type },
.name = MP_QSTR_GamePadShift,
.make_new = gamepadshift_make_new,
.locals_dict = (mp_obj_dict_t*)&gamepadshift_locals_dict,
};

1
shared-bindings/gamepad/GamePad.h
View File

@ -29,5 +29,6 @@
#define MICROPY_INCLUDED_SHARED_BINDINGS_GAMEPAD_GAMEPAD_H
extern const mp_obj_type_t gamepad_type;
extern const mp_obj_type_t gamepadshift_type;
#endif // MICROPY_INCLUDED_SHARED_BINDINGS_GAMEPAD_GAMEPAD_H

1
shared-bindings/gamepad/__init__.c
View File

@ -44,6 +44,7 @@
STATIC const mp_rom_map_elem_t gamepad_module_globals_table[] = {
{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_gamepad) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_GamePad), MP_ROM_PTR(&gamepad_type)},
{ MP_OBJ_NEW_QSTR(MP_QSTR_GamePadShift), MP_ROM_PTR(&gamepadshift_type)},
};
STATIC MP_DEFINE_CONST_DICT(gamepad_module_globals,
gamepad_module_globals_table);

21
shared-module/gamepad/GamePad.c
View File

@ -35,7 +35,7 @@
#include "shared-bindings/util.h"
void gamepad_init(size_t n_pins, const mp_obj_t* pins) {
void gamepad_init_pins(size_t n_pins, const mp_obj_t* pins) {
gamepad_obj_t* gamepad_singleton = MP_STATE_VM(gamepad_singleton);
for (size_t i = 0; i < 8; ++i) {
gamepad_singleton->pins[i] = NULL;
@ -57,4 +57,23 @@ void gamepad_init(size_t n_pins, const mp_obj_t* pins) {
gamepad_singleton->pins[i] = pin;
}
gamepad_singleton->last = 0;
gamepad_singleton->kind = GAMEPAD_KIND_PINS;
}
void gamepad_init_shift(digitalio_digitalinout_obj_t *data_pin,
digitalio_digitalinout_obj_t *clock_pin,
digitalio_digitalinout_obj_t *latch_pin) {
gamepad_obj_t* gamepad_singleton = MP_STATE_VM(gamepad_singleton);
common_hal_digitalio_digitalinout_switch_to_input(data_pin, PULL_NONE);
gamepad_singleton->pins[0] = data_pin;
common_hal_digitalio_digitalinout_switch_to_output(clock_pin, 0, DRIVE_MODE_PUSH_PULL);
gamepad_singleton->pins[1] = clock_pin;
common_hal_digitalio_digitalinout_switch_to_output(clock_pin, 1, DRIVE_MODE_PUSH_PULL);
gamepad_singleton->pins[2] = latch_pin;
gamepad_singleton->last = 0;
gamepad_singleton->kind = GAMEPAD_KIND_PINS;
}

9
shared-module/gamepad/GamePad.h
View File

@ -37,8 +37,15 @@ typedef struct {
volatile uint8_t last;
volatile uint8_t pressed;
uint8_t pulls;
uint8_t kind;
} gamepad_obj_t;
void gamepad_init(size_t n_pins, const mp_obj_t* pins);
#define GAMEPAD_KIND_PINS 0
#define GAMEPAD_KIND_SHIFT 1
void gamepad_init_pins(size_t n_pins, const mp_obj_t* pins);
void gamepad_init_shift(digitalio_digitalinout_obj_t *data_pin,
digitalio_digitalinout_obj_t *clock_pin,
digitalio_digitalinout_obj_t *latch_pin);
#endif // MICROPY_INCLUDED_GAMEPAD_GAMEPAD_H

20
shared-module/gamepad/__init__.c
View File

@ -40,6 +40,8 @@ void gamepad_tick(void) {
}
uint8_t gamepad_current = 0;
uint8_t bit = 1;
switch (gamepad_singleton->kind) {
case GAMEPAD_KIND_PINS:
for (int i = 0; i < 8; ++i) {
digitalio_digitalinout_obj_t* pin = gamepad_singleton->pins[i];
if (!pin) {
@ -51,6 +53,24 @@ void gamepad_tick(void) {
bit <<= 1;
}
gamepad_current ^= gamepad_singleton->pulls;
break;
case GAMEPAD_KIND_SHIFT:
bit = 1;
digitalio_digitalinout_obj_t* data_pin = gamepad_singleton->pins[0];
digitalio_digitalinout_obj_t* clock_pin = gamepad_singleton->pins[1];
digitalio_digitalinout_obj_t* latch_pin = gamepad_singleton->pins[2];
common_hal_digitalio_digitalinout_set_value(latch_pin, 0);
for (int i = 0; i < 8; ++i) {
common_hal_digitalio_digitalinout_set_value(clock_pin, 1);
if (common_hal_digitalio_digitalinout_get_value(data_pin)) {
gamepad_current |= bit;
}
bit <<= 1;
common_hal_digitalio_digitalinout_set_value(clock_pin, 0);
}
common_hal_digitalio_digitalinout_set_value(latch_pin, 1);
break;
}
gamepad_singleton->pressed |= gamepad_singleton->last & gamepad_current;
gamepad_singleton->last = gamepad_current;
}