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reflow-oven-control-sw
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Write button code

This commit is contained in:
Mario Hüttel 2020-02-25 21:01:34 +01:00
parent 0bc341c0aa
commit 9311d0b515
2 changed files with 49 additions and 3 deletions
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49
stm-firmware/button.c
View File

@ -20,10 +20,14 @@
#include <stm32/stm32f4xx.h>
#include <reflow-controller/button.h>
#include <stm-periph/stm32-gpio-macros.h>
#include <stm-periph/clock-enable-manager.h>
#include <stdint.h>
#include <cmsis/core_cm4.h>
#include <reflow-controller/systick.h>
static volatile uint64_t to_active_timestamp;
static volatile enum button_state int_state;
void button_init()
{
@ -32,10 +36,33 @@ void button_init()
BUTTON_PORT->PUPDR &= PUPDR_DELETE(BUTTON_PIN);
BUTTON_PORT->PUPDR |= PULLUP(BUTTON_PIN);
to_active_timestamp = 0ULL;
int_state = BUTTON_IDLE;
SYSCFG->EXTICR[1] |= 0x3;
EXTI->IMR |= (1U<<4);
EXTI->FTSR |= (1U<<4);
EXTI->FTSR |= (1U<<4);
NVIC_EnableIRQ(EXTI4_IRQn);
}
enum button_state button_read_event();
enum button_state button_read_event()
{
uint64_t time_delta;
if (BUTTON_PORT->IDR & (1U<<BUTTON_PIN)) {
return int_state;
int_state = BUTTON_IDLE;
} else {
time_delta = systick_get_global_tick() - to_active_timestamp;
if (time_delta >= BUTTON_LONG_ON_TIME_MS)
return BUTTON_LONG;
else if (time_delta >= BUTTON_SHORT_ON_TIME_MS)
return BUTTON_SHORT;
else
return BUTTON_IDLE;
}
}
void button_deinit()
{
@ -43,3 +70,23 @@ void button_deinit()
BUTTON_PORT->PUPDR &= PUPDR_DELETE(BUTTON_PIN);
rcc_manager_disable_clock(&RCC->AHB1ENR, BITMASK_TO_BITNO(BUTTON_RCC_MASK));
}
void EXTI4_IRQHandler(void)
{
uint64_t time_delta;
/* Clear interrupts */
EXTI->PR = EXTI->PR;
__DSB();
if (BUTTON_PORT->IDR & (1U<<BUTTON_PIN)) {
time_delta = systick_get_global_tick() - to_active_timestamp;
if (time_delta >= BUTTON_SHORT_ON_TIME_MS && time_delta < BUTTON_LONG_ON_TIME_MS) {
int_state = BUTTON_SHORT_RELEASED;
} else if (time_delta >= BUTTON_LONG_ON_TIME_MS) {
int_state = BUTTON_LONG_RELEASED;
}
} else {
to_active_timestamp = systick_get_global_tick();
}
}

3
stm-firmware/include/reflow-controller/button.h
View File

@ -21,7 +21,6 @@
#ifndef __BUTTON_H__
#define __BUTTON_H__
#define BUTTON_ACTIVE_LEVEL 0
#define BUTTON_PORT GPIOD
#define BUTTON_RCC_MASK RCC_AHB1ENR_GPIODEN
#define BUTTON_PIN 4
@ -29,7 +28,7 @@
#define BUTTON_SHORT_ON_TIME_MS 50
#define BUTTON_LONG_ON_TIME_MS 800
enum button_state {BUTTON_IDLE = 0, BUTTON_SHORT, BUTTON_LONG};
enum button_state {BUTTON_IDLE = 0, BUTTON_SHORT_RELEASED, BUTTON_LONG_RELEASED, BUTTON_SHORT, BUTTON_LONG};
void button_init();