263 lines
7.3 KiB
C
263 lines
7.3 KiB
C
#include <stdio.h>
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#include <stm32f4xx_hal.h>
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#include "nlr.h"
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#include "misc.h"
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#include "mpconfig.h"
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#include "qstr.h"
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#include "obj.h"
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#include "runtime.h"
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#include "timer.h"
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#include "led.h"
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#include "pin.h"
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#include "genhdr/pins.h"
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typedef struct _pyb_led_obj_t {
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mp_obj_base_t base;
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machine_uint_t led_id;
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const pin_obj_t *led_pin;
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} pyb_led_obj_t;
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STATIC const pyb_led_obj_t pyb_led_obj[] = {
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{{&pyb_led_type}, 1, &MICROPY_HW_LED1},
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#if defined(MICROPY_HW_LED2)
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{{&pyb_led_type}, 2, &MICROPY_HW_LED2},
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#if defined(MICROPY_HW_LED3)
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{{&pyb_led_type}, 3, &MICROPY_HW_LED3},
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#if defined(MICROPY_HW_LED4)
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{{&pyb_led_type}, 4, &MICROPY_HW_LED4},
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#endif
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#endif
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#endif
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};
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#define NUM_LEDS (sizeof(pyb_led_obj) / sizeof(pyb_led_obj[0]))
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void led_init(void) {
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/* GPIO structure */
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GPIO_InitTypeDef GPIO_InitStructure;
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/* Configure I/O speed, mode, output type and pull */
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GPIO_InitStructure.Speed = GPIO_SPEED_LOW;
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GPIO_InitStructure.Mode = MICROPY_HW_LED_OTYPE;
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GPIO_InitStructure.Pull = GPIO_NOPULL;
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/* Turn off LEDs and initialize */
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for (int led = 0; led < NUM_LEDS; led++) {
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const pin_obj_t *led_pin = pyb_led_obj[led].led_pin;
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MICROPY_HW_LED_OFF(led_pin);
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GPIO_InitStructure.Pin = led_pin->pin_mask;
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HAL_GPIO_Init(led_pin->gpio, &GPIO_InitStructure);
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}
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#if defined(PYBV4) || defined(PYBV10)
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// LED4 (blue) is on PB4 which is TIM3_CH1
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// we use PWM on this channel to fade the LED
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// LED3 (yellow) is on PA15 which has TIM2_CH1, so we could PWM that as well
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// GPIO configuration
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GPIO_InitStructure.Pin = MICROPY_HW_LED4.pin_mask;
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GPIO_InitStructure.Mode = GPIO_MODE_AF_PP;
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GPIO_InitStructure.Speed = GPIO_SPEED_FAST;
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GPIO_InitStructure.Pull = GPIO_NOPULL;
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GPIO_InitStructure.Alternate = GPIO_AF2_TIM3;
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HAL_GPIO_Init(MICROPY_HW_LED4.gpio, &GPIO_InitStructure);
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// PWM mode configuration
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TIM_OC_InitTypeDef oc_init;
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oc_init.OCMode = TIM_OCMODE_PWM1;
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oc_init.Pulse = 0; // off
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oc_init.OCPolarity = TIM_OCPOLARITY_HIGH;
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oc_init.OCFastMode = TIM_OCFAST_DISABLE;
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HAL_TIM_PWM_ConfigChannel(&TIM3_Handle, &oc_init, TIM_CHANNEL_1);
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// start PWM
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TIM_CCxChannelCmd(TIM3, TIM_CHANNEL_1, TIM_CCx_ENABLE);
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#endif
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}
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void led_state(pyb_led_t led, int state) {
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if (led < 1 || led > NUM_LEDS) {
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return;
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}
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#if defined(PYBV4) || defined(PYBV10)
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if (led == 4) {
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if (state) {
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TIM3->CCR1 = 0xffff;
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} else {
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TIM3->CCR1 = 0;
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}
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return;
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}
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#endif
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const pin_obj_t *led_pin = pyb_led_obj[led - 1].led_pin;
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//printf("led_state(%d,%d)\n", led, state);
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if (state == 0) {
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// turn LED off
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MICROPY_HW_LED_OFF(led_pin);
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} else {
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// turn LED on
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MICROPY_HW_LED_ON(led_pin);
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}
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}
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void led_toggle(pyb_led_t led) {
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if (led < 1 || led > NUM_LEDS) {
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return;
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}
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#if defined(PYBV4) || defined(PYBV10)
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if (led == 4) {
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if (TIM3->CCR1 == 0) {
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TIM3->CCR1 = 0xffff;
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} else {
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TIM3->CCR1 = 0;
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}
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return;
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}
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#endif
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const pin_obj_t *led_pin = pyb_led_obj[led - 1].led_pin;
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GPIO_TypeDef *gpio = led_pin->gpio;
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// We don't know if we're turning the LED on or off, but we don't really
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// care. Just invert the state.
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if (gpio->ODR & led_pin->pin_mask) {
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// pin is high, make it low
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gpio->BSRRH = led_pin->pin_mask;
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} else {
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// pin is low, make it high
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gpio->BSRRL = led_pin->pin_mask;
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}
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}
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int led_get_intensity(pyb_led_t led) {
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if (led < 1 || led > NUM_LEDS) {
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return 0;
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}
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#if defined(PYBV4) || defined(PYBV10)
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if (led == 4) {
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machine_uint_t i = TIM3->CCR1 * 255 / ((USBD_CDC_POLLING_INTERVAL*1000) - 1);
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if (i > 255) {
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i = 255;
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}
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return i;
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}
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#endif
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const pin_obj_t *led_pin = pyb_led_obj[led - 1].led_pin;
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GPIO_TypeDef *gpio = led_pin->gpio;
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// TODO convert high/low to on/off depending on board
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if (gpio->ODR & led_pin->pin_mask) {
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// pin is high
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return 255;
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} else {
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// pin is low
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return 0;
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}
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}
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void led_set_intensity(pyb_led_t led, machine_int_t intensity) {
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#if defined(PYBV4) || defined(PYBV10)
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if (led == 4) {
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// set intensity using PWM pulse width
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if (intensity < 0) {
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intensity = 0;
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} else if (intensity >= 255) {
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intensity = 0xffff;
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} else {
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intensity = intensity * ((USBD_CDC_POLLING_INTERVAL*1000) - 1) / 255;
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}
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TIM3->CCR1 = intensity;
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return;
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}
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#endif
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// intensity not supported for this LED; just turn it on/off
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led_state(led, intensity > 0);
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}
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void led_debug(int n, int delay) {
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led_state(1, n & 1);
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led_state(2, n & 2);
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led_state(3, n & 4);
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led_state(4, n & 8);
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HAL_Delay(delay);
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}
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/******************************************************************************/
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/* Micro Python bindings */
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void led_obj_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t self_in, mp_print_kind_t kind) {
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pyb_led_obj_t *self = self_in;
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print(env, "<LED %lu>", self->led_id);
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}
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STATIC mp_obj_t led_obj_make_new(mp_obj_t type_in, uint n_args, uint n_kw, const mp_obj_t *args) {
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// check arguments
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mp_check_nargs(n_args, 1, 1, n_kw, false);
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// get led number
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machine_int_t led_id = mp_obj_get_int(args[0]) - 1;
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// check led number
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if (!(0 <= led_id && led_id < NUM_LEDS)) {
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "Led %d does not exist", led_id));
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}
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// return static led object
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return (mp_obj_t)&pyb_led_obj[led_id];
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}
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mp_obj_t led_obj_on(mp_obj_t self_in) {
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pyb_led_obj_t *self = self_in;
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led_state(self->led_id, 1);
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return mp_const_none;
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}
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mp_obj_t led_obj_off(mp_obj_t self_in) {
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pyb_led_obj_t *self = self_in;
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led_state(self->led_id, 0);
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return mp_const_none;
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}
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mp_obj_t led_obj_toggle(mp_obj_t self_in) {
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pyb_led_obj_t *self = self_in;
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led_toggle(self->led_id);
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return mp_const_none;
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}
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mp_obj_t led_obj_intensity(uint n_args, const mp_obj_t *args) {
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pyb_led_obj_t *self = args[0];
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if (n_args == 1) {
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return mp_obj_new_int(led_get_intensity(self->led_id));
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} else {
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led_set_intensity(self->led_id, mp_obj_get_int(args[1]));
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return mp_const_none;
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}
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(led_obj_on_obj, led_obj_on);
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(led_obj_off_obj, led_obj_off);
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(led_obj_toggle_obj, led_obj_toggle);
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STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(led_obj_intensity_obj, 1, 2, led_obj_intensity);
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STATIC const mp_map_elem_t led_locals_dict_table[] = {
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{ MP_OBJ_NEW_QSTR(MP_QSTR_on), (mp_obj_t)&led_obj_on_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_off), (mp_obj_t)&led_obj_off_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_toggle), (mp_obj_t)&led_obj_toggle_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_intensity), (mp_obj_t)&led_obj_intensity_obj },
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};
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STATIC MP_DEFINE_CONST_DICT(led_locals_dict, led_locals_dict_table);
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const mp_obj_type_t pyb_led_type = {
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{ &mp_type_type },
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.name = MP_QSTR_Led,
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.print = led_obj_print,
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.make_new = led_obj_make_new,
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.locals_dict = (mp_obj_t)&led_locals_dict,
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};
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