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#include "stm32_unict_lib.h"
#include <stdio.h>
#define X_INCR 20
#define Y_INCR 5
#define GET_MONEY 0
#define EROGATING 1
#define EROGATED 2
#define PRICE_L 1.5
/*
* X = PB10
* Y = PB4
* Z = PB5
* T = PB6
* output:
* red = PB0
* yellow = PC2
*/
int money_tot = 0;
int status = GET_MONEY;
float erogated = 0;
char s[5];
int flashing = 0;
int
main()
{
GPIO_init(GPIOB);
GPIO_init(GPIOC);
GPIO_config_output(GPIOC, 2);
GPIO_config_output(GPIOB, 0);
TIM_init(TIM2);
TIM_set(TIM2, 0);
TIM_on(TIM2);
TIM_enable_irq(TIM2, IRQ_UPDATE);
TIM_config_timebase(TIM2, 8400, 5000);
GPIO_config_input(GPIOB, 10); /* X */
GPIO_config_input(GPIOB, 4); /* Y */
GPIO_config_input(GPIOB, 5); /* Z */
GPIO_config_input(GPIOB, 6); /* T */
DISPLAY_init();
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);
GPIO_config_EXTI(GPIOB, EXTI6);
EXTI_enable(EXTI6, FALLING_EDGE);
for (;;) {
if (status == GET_MONEY) {
sprintf(s, "%4d", money_tot);
DISPLAY_puts(0, s);
} else if (status == EROGATING) {
sprintf(s, "%g", erogated);
DISPLAY_puts(0, s);
}
}
return 0;
}
void
EXTI15_10_IRQHandler(void)
{
if (EXTI_isset(EXTI10)) {
if (status == GET_MONEY) {
money_tot += X_INCR;
}
EXTI_clear(EXTI10);
}
}
void
EXTI4_IRQHandler(void)
{
if (EXTI_isset(EXTI4)) {
if (status == GET_MONEY) {
money_tot += Y_INCR;
}
EXTI_clear(EXTI4);
}
}
void
EXTI9_5_IRQHandler(void)
{
if (EXTI_isset(EXTI5)) {
if (status == GET_MONEY) {
money_tot = 0;
}
EXTI_clear(EXTI5);
}
if (EXTI_isset(EXTI6)) {
if (status == GET_MONEY) {
status = EROGATING;
} else if (status == EROGATED) {
GPIO_write(GPIOB, 0, 0);
status = GET_MONEY;
erogated = 0;
money_tot = 0;
}
EXTI_clear(EXTI6);
}
}
void
TIM2_IRQHandler(void)
{
if (erogated >= (money_tot / PRICE_L)) {
if (status == EROGATING) {
status = EROGATED;
GPIO_write(GPIOB, 0, 1);
GPIO_write(GPIOC, 2, 0);
}
} else {
if (status == EROGATING) {
GPIO_toggle(GPIOC, 2);
erogated += 0.375;
}
}
TIM_update_clear(TIM2);
}
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