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#include <stdio.h>
#include <stm32f4xx.h>
#include <stm32f4xx_gpio.h>
#include "misc.h"
#include "mpconfig.h"
#include "qstr.h"
#include "obj.h"
#include "led.h"
#include "pin.h"
#include "build/pins.h"
static const pin_obj_t *gLed[] = {
&PYB_LED1,
#if defined(PYB_LED2)
&PYB_LED2,
#if defined(PYB_LED3)
&PYB_LED3,
#if defined(PYB_LED4)
&PYB_LED4,
#endif
#endif
#endif
};
#define NUM_LEDS (sizeof(gLed) / sizeof(gLed[0]))
void led_init(void) {
/* GPIO structure */
GPIO_InitTypeDef GPIO_InitStructure;
/* Configure I/O speed, mode, output type and pull */
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_InitStructure.GPIO_OType = PYB_OTYPE;
/* Turn off LEDs and initialize */
for (int led = 0; led < NUM_LEDS; led++) {
PYB_LED_OFF(gLed[led]);
GPIO_InitStructure.GPIO_Pin = gLed[led]->pin_mask;
GPIO_Init(gLed[led]->gpio, &GPIO_InitStructure);
}
}
void led_state(pyb_led_t led, int state) {
if (led < 1 || led > NUM_LEDS) {
return;
}
const pin_obj_t *led_pin = gLed[led - 1];
if (state == 0) {
// turn LED off
PYB_LED_OFF(led_pin);
} else {
// turn LED on
PYB_LED_ON(led_pin);
}
}
void led_toggle(pyb_led_t led) {
if (led < 1 || led > NUM_LEDS) {
return;
}
const pin_obj_t *led_pin = gLed[led - 1];
GPIO_TypeDef *gpio = led_pin->gpio;
// We don't know if we're turning the LED on or off, but we don't really
// care. Just invert the state.
if (gpio->ODR & led_pin->pin_mask) {
// pin is high, make it low
gpio->BSRRH = led_pin->pin_mask;
} else {
// pin is low, make it high
gpio->BSRRL = led_pin->pin_mask;
}
}
/******************************************************************************/
/* Micro Python bindings */
typedef struct _pyb_led_obj_t {
mp_obj_base_t base;
uint led_id;
} pyb_led_obj_t;
void led_obj_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t self_in, mp_print_kind_t kind) {
pyb_led_obj_t *self = self_in;
print(env, "<LED %lu>", self->led_id);
}
mp_obj_t led_obj_on(mp_obj_t self_in) {
pyb_led_obj_t *self = self_in;
led_state(self->led_id, 1);
return mp_const_none;
}
mp_obj_t led_obj_off(mp_obj_t self_in) {
pyb_led_obj_t *self = self_in;
led_state(self->led_id, 0);
return mp_const_none;
}
mp_obj_t led_obj_toggle(mp_obj_t self_in) {
pyb_led_obj_t *self = self_in;
led_toggle(self->led_id);
return mp_const_none;
}
static MP_DEFINE_CONST_FUN_OBJ_1(led_obj_on_obj, led_obj_on);
static MP_DEFINE_CONST_FUN_OBJ_1(led_obj_off_obj, led_obj_off);
static MP_DEFINE_CONST_FUN_OBJ_1(led_obj_toggle_obj, led_obj_toggle);
static const mp_method_t led_methods[] = {
{ MP_QSTR_on, &led_obj_on_obj },
{ MP_QSTR_off, &led_obj_off_obj },
{ MP_QSTR_toggle, &led_obj_toggle_obj },
{ MP_QSTR_NULL, NULL },
};
static const mp_obj_type_t led_obj_type = {
{ &mp_type_type },
.name = MP_QSTR_Led,
.print = led_obj_print,
.methods = led_methods,
};
static mp_obj_t pyb_Led(mp_obj_t led_id) {
pyb_led_obj_t *o = m_new_obj(pyb_led_obj_t);
o->base.type = &led_obj_type;
o->led_id = mp_obj_get_int(led_id);
return o;
}
MP_DEFINE_CONST_FUN_OBJ_1(pyb_Led_obj, pyb_Led);
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