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#include <rtthread.h> #include <rtdevice.h> #define LED_PIN 40 int main(void) { rt_pin_mode(LED_PIN, PIN_MODE_OUTPUT); while (1) { rt_pin_write(LED_PIN, PIN_HIGH); rt_thread_mdelay(500); rt_pin_write(LED_PIN, PIN_LOW); rt_thread_mdelay(500); } return RT_EOK; }