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#include <stdio.h>
#include <stm32f4xx.h>
#include <stm32f4xx_gpio.h>
#include "misc.h"
#include "mpconfig.h"
#include "obj.h"
#include "led.h"
#define PYB_LED_R_PORT (GPIOA)
#define PYB_LED_R1_PIN (GPIO_Pin_8)
#define PYB_LED_R2_PIN (GPIO_Pin_10)
#define PYB_LED_G_PORT (GPIOC)
#define PYB_LED_G1_PIN (GPIO_Pin_4)
#define PYB_LED_G2_PIN (GPIO_Pin_5)
void led_init(void) {
// set the output high (so LED is off)
PYB_LED_R_PORT->BSRRL = PYB_LED_R1_PIN;
PYB_LED_R_PORT->BSRRL = PYB_LED_R2_PIN;
PYB_LED_G_PORT->BSRRL = PYB_LED_G1_PIN;
PYB_LED_G_PORT->BSRRL = PYB_LED_G2_PIN;
// make them open drain outputs
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin = PYB_LED_R1_PIN | PYB_LED_R2_PIN;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(PYB_LED_R_PORT, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = PYB_LED_G1_PIN | PYB_LED_G2_PIN;
GPIO_Init(PYB_LED_G_PORT, &GPIO_InitStructure);
}
void led_state(pyb_led_t led, int state) {
GPIO_TypeDef *port;
uint32_t pin;
switch (led) {
case PYB_LED_R1: port = PYB_LED_R_PORT; pin = PYB_LED_R1_PIN; break;
case PYB_LED_R2: port = PYB_LED_R_PORT; pin = PYB_LED_R2_PIN; break;
case PYB_LED_G1: port = PYB_LED_G_PORT; pin = PYB_LED_G1_PIN; break;
case PYB_LED_G2: port = PYB_LED_G_PORT; pin = PYB_LED_G2_PIN; break;
default: return;
}
if (state == 0) {
// turn LED off (output is high)
port->BSRRL = pin;
} else {
// turn LED on (output is low)
port->BSRRH = pin;
}
}
void led_toggle(pyb_led_t led) {
GPIO_TypeDef *port;
uint32_t pin;
switch (led) {
case PYB_LED_R1: port = PYB_LED_R_PORT; pin = PYB_LED_R1_PIN; break;
case PYB_LED_R2: port = PYB_LED_R_PORT; pin = PYB_LED_R2_PIN; break;
case PYB_LED_G1: port = PYB_LED_G_PORT; pin = PYB_LED_G1_PIN; break;
case PYB_LED_G2: port = PYB_LED_G_PORT; pin = PYB_LED_G2_PIN; break;
default: return;
}
if (!(port->ODR & pin)) {
// turn LED off (output high)
port->BSRRL = pin;
} else {
// turn LED on (output low)
port->BSRRH = pin;
}
}
/******************************************************************************/
/* 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) {
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;
switch (self->led_id) {
case 1: led_state(PYB_LED_G1, 1); break;
case 2: led_state(PYB_LED_G2, 1); break;
}
return mp_const_none;
}
mp_obj_t led_obj_off(mp_obj_t self_in) {
pyb_led_obj_t *self = self_in;
switch (self->led_id) {
case 1: led_state(PYB_LED_G1, 0); break;
case 2: led_state(PYB_LED_G2, 0); break;
}
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 const mp_obj_type_t led_obj_type = {
{ &mp_const_type },
"Led",
led_obj_print, // print
NULL, // make_new
NULL, // call_n
NULL, // unary_op
NULL, // binary_op
NULL, // getiter
NULL, // iternext
{ // method list
{ "on", &led_obj_on_obj },
{ "off", &led_obj_off_obj },
{ NULL, NULL },
}
};
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;
}
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