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#include "stm32_unict_lib.h"
#include <stdio.h>
#include <string.h>
/* LED RED = PB0,
* LED YELLOW = PC2,
* LED GREEN = PC3,
* X = PB10,
* Y = PB4,
* Z = PB5,
* T = PB6
*/
#define TA_MIN 10
#define TA_MAX 30
#define CYCLE_50MS 12
int config_state = 0;
int config_ta = 0;
int ta_time = TA_MIN;
typedef enum {
AUTO,
HAND
} modes_t;
typedef enum {
CLOSED,
OPENING,
OPEN,
CLOSING
} status_t;
modes_t mode = AUTO;
status_t status = CLOSED;
char gate[4] = "----";
int counter_open = 0;
int counter_ta = 0;
void
dash(int n)
{
int i;
for (i = 0; i < n; ++i)
*(gate + i) = '-';
for (i = n; i < 4; ++i)
*(gate + i) = ' ';
}
int
main()
{
GPIO_init(GPIOB);
GPIO_init(GPIOC);
GPIO_config_output(GPIOB, 0);
GPIO_config_output(GPIOC, 2);
GPIO_config_output(GPIOC, 3);
GPIO_config_input(GPIOB, 6);
GPIO_config_input(GPIOB, 10);
GPIO_config_input(GPIOB, 4);
GPIO_config_input(GPIOB, 5);
GPIO_config_EXTI(GPIOB, EXTI6);
EXTI_enable(EXTI6, FALLING_EDGE);
GPIO_config_EXTI(GPIOB, EXTI10);
EXTI_enable(EXTI10, FALLING_EDGE);
GPIO_config_EXTI(GPIOB, EXTI4);
EXTI_enable(EXTI4, FALLING_EDGE);
GPIO_config_EXTI(GPIOB, EXTI5);
EXTI_enable(EXTI5, FALLING_EDGE);
DISPLAY_init();
ADC_init(ADC1, ADC_RES_8, ADC_ALIGN_RIGHT);
ADC_channel_config(ADC1, GPIOC, 1, 11);
ADC_on(ADC1);
ADC_sample_channel(ADC1, 11);
/* Use one timer for:
* OPENING time: 50 * 12 = 600ms
*
*/
TIM_init(TIM2);
TIM_set(TIM2, 0);
TIM_on(TIM2);
TIM_enable_irq(TIM2, IRQ_UPDATE);
TIM_config_timebase(TIM2, 8400, 500); /* 50 ms */
int adc_read;
char buffer[4];
if (mode == HAND) {
GPIO_write(GPIOC, 2, 1);
}
for (;;) {
ADC_start(ADC1);
if (config_state) {
if (config_ta) {
while (!ADC_completed(ADC1)) { }
adc_read = ADC_read(ADC1);
ta_time = adc_read * (TA_MAX - TA_MIN) / 255 + TA_MIN;
sprintf(buffer, " %2d", ta_time);
} else {
if (mode == AUTO) {
sprintf(buffer, "AUTO");
} else {
sprintf(buffer, "HAND");
}
}
} else {
strcpy(buffer, gate);
}
DISPLAY_puts(0, buffer);
}
return 0;
}
void
EXTI9_5_IRQHandler(void)
{
if (EXTI_isset(EXTI6)) {
config_state = !config_state;
if (!config_state) {
config_ta = 0;
}
GPIO_toggle(GPIOB, 0);
EXTI_clear(EXTI6);
}
if (EXTI_isset(EXTI5)) {
if (mode == HAND) {
if (status == CLOSED) {
status = OPENING;
} else if (status == OPEN) {
status = CLOSING;
}
}
EXTI_clear(EXTI5);
}
}
void
EXTI15_10_IRQHandler(void)
{
if (EXTI_isset(EXTI10)) {
if (config_state) {
config_ta = 1;
} else {
if (status == CLOSED) {
status = OPENING;
}
}
EXTI_clear(EXTI10);
}
}
void
EXTI4_IRQHandler(void)
{
if (EXTI_isset(EXTI4)) {
if (config_state) {
config_ta = 0;
if (mode == AUTO) {
mode = HAND;
} else {
mode = AUTO;
}
GPIO_toggle(GPIOC, 2);
}
EXTI_clear(EXTI4);
}
}
void
TIM2_IRQHandler(void)
{
if (status == CLOSED) {
GPIO_write(GPIOC, 3, 0);
} else if (status == OPEN) {
GPIO_write(GPIOC, 3, 1);
} else {
GPIO_toggle(GPIOC, 3);
}
if (status == OPEN) {
counter_ta++;
if (counter_ta >= ta_time * 20) {
if (mode == AUTO) {
counter_ta = 0;
status = CLOSING;
}
}
}
if (status == OPENING || status == CLOSING) {
counter_open++;
if (counter_open == CYCLE_50MS) {
if (status == OPENING) {
status = OPEN;
} else if (status == CLOSING) {
status = CLOSED;
}
counter_open = 0;
}
if (status == OPENING) {
if (counter_open <= CYCLE_50MS / 4) {
dash(3);
} else if (counter_open <= CYCLE_50MS / 3) {
dash(2);
} else if (counter_open <= CYCLE_50MS / 2) {
dash(1);
} else {
dash(0);
}
} else if (status == CLOSING) {
if (counter_open <= CYCLE_50MS / 4) {
dash(1);
} else if (counter_open <= CYCLE_50MS / 3) {
dash(2);
} else if (counter_open <= CYCLE_50MS / 2) {
dash(3);
} else {
dash(4);
}
}
}
TIM_update_clear(TIM2);
}
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