initial commit

source/application/example_semaphore/example_semaphore.mk

@@ -0,0 +1,3 @@
+INCLUDES += application/example_semaphore
+DOC_SRC += application/example_semaphore
+SUB_FOLDER += application/example_semaphore

source/application/example_semaphore/main.c

@@ -0,0 +1,51 @@
+#include <stdbool.h>
+
+#include "board.h"
+#include "ctx.h"
+#include "stack.h"
+#include "queue.h"
+#include "thread.h"
+#include "schedule.h"
+#include "isr.h"
+#include "sys_tick.h"
+#include "semaphore.h"
+
+#define STACK_SIZE  256
+static stack_t tc_1_stack[STACK_SIZE];
+static struct thread_context tc_1;
+static stack_t tc_2_stack[STACK_SIZE];
+static struct thread_context tc_2;
+
+static struct semaphore sem;
+
+void task2(void *arg)
+{
+	gpio_open(&led_1);
+	gpio_write(&led_1, 0);
+	while(1) {
+		semaphore_wait(&sem);
+		gpio_toggle(&led_1);
+	}
+}
+
+void task1(void *arg)
+{
+	while(1) {
+		sleep_ms(3000);
+		semaphore_post(&sem);
+	}
+}
+
+int main(void)
+{
+	board_init();
+	sys_tick_init(&timer_1);
+
+	semaphore_init( &sem, 0);
+
+	thread_create(&tc_1, tc_1_stack, STACK_SIZE, task1, NULL, THREAD_PRIO_LOW);
+	thread_create(&tc_2, tc_2_stack, STACK_SIZE, task2, NULL, THREAD_PRIO_LOW);
+	schedule_start();
+
+	return 0;
+}