#include "mbed.h"
#include "rtos.h"

/*
 * The stack size is defined in cmsis_os.h mainly dependent on the underlying toolchain and
 * the C standard library. For GCC, ARM_STD and IAR it is defined with a size of 2048 bytes
 * and for ARM_MICRO 512. Because of reduce RAM size some targets need a reduced stacksize.
 */
#if defined(TARGET_STM32L053R8) || defined(TARGET_STM32L053C8)
#define STACK_SIZE DEFAULT_STACK_SIZE/4
#else
#define STACK_SIZE DEFAULT_STACK_SIZE
#endif

void print_char(char c = '*')
{
    printf("%c", c);
    fflush(stdout);
}

DigitalOut led1(LED1);
DigitalOut led2(LED2);

void led2_thread(void const *argument) {
    while (true) {
        led2 = !led2;
        Thread::wait(1000);
        print_char();
    }
}

int main() {
    Thread thread(led2_thread, NULL, osPriorityNormal, STACK_SIZE);

    while (true) {
        led1 = !led1;
        Thread::wait(500);
    }
}
