blob: c3374b847e24b8a9eafbdcd4282fedb48bb3d10c (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
|
#include <stm_misc.h>
#include <stm32f4xx_gpio.h>
#include <stm32f4xx_exti.h>
#include <stm32f4xx_syscfg.h>
#include <stm32f4xx_rcc.h>
#include "misc.h"
#include "mpconfig.h"
#include "qstr.h"
#include "obj.h"
#include "usrsw.h"
void switch_init(void) {
// make it an input with pull-up
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin = USRSW_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
GPIO_InitStructure.GPIO_PuPd = USRSW_PUPD;
GPIO_Init(USRSW_PORT, &GPIO_InitStructure);
// the rest does the EXTI interrupt
/* Enable SYSCFG clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
/* Connect EXTI Line to GPIO pin */
SYSCFG_EXTILineConfig(USRSW_EXTI_PORT, USRSW_EXTI_PIN);
/* Configure EXTI Line */
EXTI_InitTypeDef EXTI_InitStructure;
EXTI_InitStructure.EXTI_Line = USRSW_EXTI_LINE;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = USRSW_EXTI_EDGE;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
/* Enable and set EXTI15_10 Interrupt to the lowest priority */
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_InitStructure.NVIC_IRQChannel = USRSW_EXTI_IRQN;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
int switch_get(void) {
#if defined (PYBOARD3) || defined (PYBOARD4)
if (USRSW_PORT->IDR & USRSW_PIN) {
// pulled high, so switch is not pressed
return 0;
} else {
// pulled low, so switch is pressed
return 1;
}
#elif defined (STM32F4DISC)
/* switch pulled down */
if (USRSW_PORT->IDR & USRSW_PIN) {
// pulled high, so switch is pressed
return 1;
} else {
// pulled low, so switch is not pressed
return 0;
}
#endif
}
/******************************************************************************/
/* Micro Python bindings */
static mp_obj_t pyb_switch(void) {
if (switch_get()) {
return mp_const_true;
} else {
return mp_const_false;
}
}
MP_DEFINE_CONST_FUN_OBJ_0(pyb_switch_obj, pyb_switch);
|
