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authorSanto Cariotti <santo@dcariotti.me>2021-10-20 11:03:18 +0200
committerSanto Cariotti <santo@dcariotti.me>2021-10-20 11:03:18 +0200
commitbfe6a3992da9b804c4cca8cbe769a55fc1f27745 (patch)
treef5be92cf06c25bf47d4c2d00b1b567d6b7d28784 /Year_3/LSM
parentc885607ed24f5a63d6b9f44486e5770445d4ddd8 (diff)
lsm: add file
Diffstat (limited to 'Year_3/LSM')
-rw-r--r--Year_3/LSM/ex_20181017.c204
1 files changed, 204 insertions, 0 deletions
diff --git a/Year_3/LSM/ex_20181017.c b/Year_3/LSM/ex_20181017.c
new file mode 100644
index 0000000..147c138
--- /dev/null
+++ b/Year_3/LSM/ex_20181017.c
@@ -0,0 +1,204 @@
+#include "stm32_unict_lib.h"
+#include <stdio.h>
+#include <string.h>
+
+#define OPEN_T 20
+#define CLOSE_T 8
+
+typedef enum {
+ CLOSED,
+ OPENING,
+ OPENED,
+ CLOSING
+} status_t;
+
+status_t status = CLOSED;
+
+/*
+ * X = PB10
+ * Y = PB4
+ * Z = PB5
+ * output:
+ * red = PB0
+ */
+
+char str[5] = "----\0";
+int ms_to_open = OPEN_T; /* 500ms x 10s */
+int ms_to_close = CLOSE_T; /* 500ms x 4s */
+
+int level = 4;
+
+void
+print_dash(int n, int opt)
+{
+ int i;
+
+ if (opt && level < n)
+ return;
+ else if (!opt && level > n)
+ return;
+
+ memset(str, ' ', 5);
+ for (i = 0; i < n; ++i)
+ *(str + i) = '-';
+
+ for (; i < 5; ++i)
+ *(str + i) = ' ';
+
+ level = n;
+}
+
+int
+main()
+{
+ GPIO_init(GPIOB);
+ GPIO_init(GPIOC);
+
+ GPIO_config_input(GPIOB, 10); /* X, change status to OPENING */
+ GPIO_config_input(GPIOB, 4); /* Y */
+ GPIO_config_input(GPIOB, 5); /* Z */
+
+ GPIO_config_output(GPIOB, 0); /* led */
+
+ 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);
+
+ /* Timer for red LED */
+ TIM_init(TIM2);
+ TIM_set(TIM2, 0);
+ TIM_on(TIM2);
+ TIM_enable_irq(TIM2, IRQ_UPDATE);
+ TIM_config_timebase(TIM2, 8400, 5000);
+
+ for (;;) {
+ DISPLAY_puts(0, str);
+ }
+
+ return 0;
+}
+
+void
+EXTI9_5_IRQHandler(void)
+{
+ if (EXTI_isset(EXTI5)) {
+ int mul;
+ if (status == OPENED) {
+ switch (level) {
+ case 1:
+ mul = 25;
+ break;
+ case 2:
+ mul = 50;
+ break;
+ default:
+ mul = 70;
+ }
+ ms_to_close = CLOSE_T - (CLOSE_T * mul / 100);
+ } else if (status == CLOSING) {
+ switch (level) {
+ case 1:
+ mul = 25;
+ break;
+ case 2:
+ mul = 50;
+ break;
+ default:
+ mul = 70;
+ }
+ ms_to_open = OPEN_T - (OPEN_T * mul / 100);
+ status = OPENING;
+ }
+ EXTI_clear(EXTI5);
+ }
+}
+
+void
+EXTI15_10_IRQHandler(void)
+{
+ if (EXTI_isset(EXTI10)) {
+ status = OPENING;
+ int mul;
+ switch (level) {
+ case 1:
+ mul = 70;
+ break;
+ case 2:
+ mul = 50;
+ break;
+ default:
+ mul = 25;
+ }
+ ms_to_open = OPEN_T - (OPEN_T * mul / 100);
+ EXTI_clear(EXTI10);
+ }
+}
+
+void
+EXTI4_IRQHandler(void)
+{
+ if (EXTI_isset(EXTI4)) {
+ if (status == OPENED) {
+ status = CLOSING;
+ ms_to_close = OPEN_T;
+ } else if (status == OPENING) {
+ status = CLOSING;
+ ms_to_close = OPEN_T - ms_to_close;
+ }
+ EXTI_clear(EXTI4);
+ }
+}
+
+void
+TIM2_IRQHandler(void)
+{
+ if (status == OPENING) {
+ GPIO_toggle(GPIOB, 0);
+ ms_to_open--;
+
+ if (ms_to_open <= OPEN_T - (OPEN_T * 70 / 100)) {
+ print_dash(1, 1);
+ } else if (ms_to_open <= OPEN_T - (OPEN_T * 50 / 100)) {
+ print_dash(2, 1);
+ } else if (ms_to_open <= OPEN_T - (OPEN_T * 25 / 100)) {
+ print_dash(3, 1);
+ }
+
+ if (ms_to_open == 0) {
+ status = OPENED;
+ print_dash(0, 1);
+ GPIO_write(GPIOB, 0, 0);
+ ms_to_open = OPEN_T; /* Reset timer of 10s */
+ }
+ } else if (status == OPENED) {
+ ms_to_close--;
+ if (ms_to_close == 0) {
+ status = CLOSING;
+ ms_to_close = OPEN_T; /* During the closing, ms_to_close has the same value of OPENING time */
+ }
+ } else if (status == CLOSING) {
+ GPIO_toggle(GPIOB, 0);
+ ms_to_close--;
+ if (ms_to_close <= OPEN_T - (OPEN_T * 70 / 100)) {
+ print_dash(3, 0);
+ } else if (ms_to_close <= OPEN_T - (OPEN_T * 50 / 100)) {
+ print_dash(2, 0);
+ } else if (ms_to_close <= OPEN_T - (OPEN_T * 25 / 100)) {
+ print_dash(1, 0);
+ }
+
+ if (ms_to_close == 0) {
+ status = CLOSED;
+ print_dash(4, 0);
+ GPIO_write(GPIOB, 0, 0);
+ ms_to_close = CLOSE_T;
+ }
+ }
+
+ TIM_update_clear(TIM2);
+}