Example

main.c

#include "uos.h"
#include "board.h"
#include "sysdef.h"
#include "task_led.h"
#include "task_tty.h"
int main(void)
{
 board_init();
 uos_kernel_init();
 uos_task_setup(SYSDEF_TASK_ID_LED, task_led, SYSDEF_TASK_PRIORITY_LED);
 uos_task_setup(SYSDEF_TASK_ID_TTY, task_tty, SYSDEF_TASK_PRIORITY_TTY);
 uos_kernel_start();
 return 0;
}

task_led.c

#include "uos.h"
#include "board.h"
#include "sysdef.h"
#include "task_led.h"
void task_led(void)
{
 while (1) {
#if (UOSDEF_USE_EVENT)
 TASKID tid;
 unsigned int value;
 uos_task_event_recv(&tid, &value);
 switch (value) {
 case 0xAA:
 board_led(1);
 break;
 case 0x55:
 board_led(0);
 break;
 default:
 break;
 }
#else
 board_led(1);
 uos_task_sleep(500);
 board_led(0);
 uos_task_sleep(500);
#endif
 }
}
void task_led_api_led_on(void)
{
#if (UOSDEF_USE_EVENT)
 uos_task_event_send(SYSDEF_TASK_ID_LED, 0xAA);
#endif
}
void task_led_api_led_off(void)
{
#if (UOSDEF_USE_EVENT)
 uos_task_event_send(SYSDEF_TASK_ID_LED, 0x55);
#endif
}

task_tty.c

#include "uos.h"
#include "board.h"
#include "task_tty.h"
#include "task_led.h"
static void my_puts(char *p)
{
 while (*p) {
 while (board_uart_putc(*p) != *p) {
 }
 p++;
 }
}
void task_tty(void)
{
 int led = 0;
 uos_time_t ut_kernel, ut_task;
 while (1) {
 led = !led;
 if (led) {
 my_puts("LED[On ] \r\n");
 task_led_api_led_on();
 } else {
 my_puts("LED[Off] \r\n");
 task_led_api_led_off();
 }
 uos_task_sleep(500);
#if (UOSDEF_USE_TIME)
 uos_time_kernel(&ut_kernel);
 uos_time_task(&ut_task);
#endif
 }
}

Footprint

The kernel footprints with the sample application are shown below.

Version 0.2.0

UOSDEF_USE_EVENT=0, UOSDEF_USE_TIME=0

Debug configuration	Release configuration
text data bss dec hex filename 3508 4 596 4108 100c UOS-LPC800.axf	text data bss dec hex filename 2088 4 596 2688 a80 UOS-LPC800.axf

UOSDEF_USE_EVENT=0, UOSDEF_USE_TIME=1

Debug configuration	Release configuration
text data bss dec hex filename 4020 4 632 4656 1230 UOS-LPC800.axf	text data bss dec hex filename 2296 4 632 2932 b74 UOS-LPC800.axf

UOSDEF_USE_EVENT=1, UOSDEF_USE_TIME=0

Debug configuration	Release configuration
text data bss dec hex filename 4072 4 656 4732 127c UOS-LPC800.axf	text data bss dec hex filename 2324 4 656 2984 ba8 UOS-LPC800.axf

UOSDEF_USE_EVENT=1, UOSDEF_USE_TIME=1

Debug configuration	Release configuration
text data bss dec hex filename 4400 4 656 5060 13c4 UOS-LPC800.axf	text data bss dec hex filename 2476 4 656 3136 c40 UOS-LPC800.axf

Version 0.1.0

Debug configuration	Release configuration
text data bss dec hex filename 3504 4 576 4084 ff4 UOS-LPC800.axf	text data bss dec hex filename 2272 4 576 2852 b24 UOS-LPC800.axf