micropython/stmhal/led.c

214 lines
5.6 KiB
C
Raw Normal View History

2014-03-13 01:06:26 +00:00
#include <stdio.h>
#include <stm32f4xx_hal.h>
#include "usbd_cdc_msc.h"
#include "usbd_cdc_interface.h"
2014-03-13 01:06:26 +00:00
#include "misc.h"
#include "mpconfig.h"
#include "qstr.h"
#include "obj.h"
#include "runtime.h"
2014-03-13 01:06:26 +00:00
#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.Speed = GPIO_SPEED_LOW;
GPIO_InitStructure.Mode = PYB_OTYPE;
2014-03-13 01:06:26 +00:00
GPIO_InitStructure.Pull = GPIO_NOPULL;
/* Turn off LEDs and initialize */
for (int led = 0; led < NUM_LEDS; led++) {
PYB_LED_OFF(gLed[led]);
GPIO_InitStructure.Pin = gLed[led]->pin_mask;
HAL_GPIO_Init(gLed[led]->gpio, &GPIO_InitStructure);
}
// LED4 (blue) is on PB4 which is TIM3_CH1
// we use PWM on this channel to fade the LED
// GPIO configuration
GPIO_InitStructure.Pin = GPIO_PIN_4;
GPIO_InitStructure.Mode = GPIO_MODE_AF_PP;
GPIO_InitStructure.Speed = GPIO_SPEED_FAST;
GPIO_InitStructure.Pull = GPIO_NOPULL;
GPIO_InitStructure.Alternate = GPIO_AF2_TIM3;
HAL_GPIO_Init(GPIOB, &GPIO_InitStructure);
// PWM mode configuration
TIM_OC_InitTypeDef oc_init;
oc_init.OCMode = TIM_OCMODE_PWM1;
oc_init.Pulse = 0; // off
oc_init.OCPolarity = TIM_OCPOLARITY_HIGH;
oc_init.OCFastMode = TIM_OCFAST_DISABLE;
HAL_TIM_PWM_ConfigChannel(&TIM3_Handle, &oc_init, TIM_CHANNEL_1);
// start PWM
TIM_CCxChannelCmd(TIM3, TIM_CHANNEL_1, TIM_CCx_ENABLE);
//HAL_TIM_PWM_Start(&USBD_CDC_TIM3_Handle, TIM_CHANNEL_1);
2014-03-13 01:06:26 +00:00
}
void led_state(pyb_led_t led, int state) {
if (led < 1 || led > NUM_LEDS) {
return;
}
if (led == 4) {
if (state) {
TIM3->CCR1 = 0xffff;
} else {
TIM3->CCR1 = 0;
}
return;
}
2014-03-13 01:06:26 +00:00
const pin_obj_t *led_pin = gLed[led - 1];
//printf("led_state(%d,%d)\n", led, state);
2014-03-13 01:06:26 +00:00
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;
}
}
int led_get_state(pyb_led_t led) {
if (led < 1 || led > NUM_LEDS) {
return 0;
}
const pin_obj_t *led_pin = gLed[led - 1];
GPIO_TypeDef *gpio = led_pin->gpio;
// TODO convert high/low to on/off depending on board
if (gpio->ODR & led_pin->pin_mask) {
// pin is high
return 1;
} else {
// pin is low
return 0;
}
}
void led_debug(int n, int delay) {
led_state(1, n & 1);
led_state(2, n & 2);
led_state(3, n & 4);
led_state(4, n & 8);
HAL_Delay(delay);
}
2014-03-13 01:06:26 +00:00
/******************************************************************************/
/* 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;
}
mp_obj_t led_obj_state(uint n_args, const mp_obj_t *args) {
pyb_led_obj_t *self = args[0];
if (n_args == 0) {
return MP_BOOL(led_get_state(self->led_id));
} else {
led_state(self->led_id, rt_is_true(args[1]));
return mp_const_none;
}
}
mp_obj_t led_obj_intensity(mp_obj_t self_in, mp_obj_t intensity) {
pyb_led_obj_t *self = self_in;
if (self->led_id == 4) {
TIM3->CCR1 = mp_obj_get_int(intensity);
}
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 MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(led_obj_state_obj, 1, 2, led_obj_state);
STATIC MP_DEFINE_CONST_FUN_OBJ_2(led_obj_intensity_obj, led_obj_intensity);
2014-03-13 01:06:26 +00:00
STATIC const mp_method_t led_methods[] = {
2014-03-13 01:06:26 +00:00
{ "on", &led_obj_on_obj },
{ "off", &led_obj_off_obj },
{ "toggle", &led_obj_toggle_obj },
{ "state", &led_obj_state_obj },
{ "intensity", &led_obj_intensity_obj },
2014-03-13 01:06:26 +00:00
{ NULL, NULL },
};
STATIC const mp_obj_type_t led_obj_type = {
2014-03-13 01:06:26 +00:00
{ &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) {
2014-03-13 01:06:26 +00:00
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);