61 lines
1.3 KiB
C
61 lines
1.3 KiB
C
/*
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* 程序清单：闪灯例程
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*
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* 跑马灯大概是最简单的例子，就类似于每种编程语言中程序员接触的第一个程序
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* Hello World 一样，所以这个例子就从跑马灯开始。创建一个线程，让它定时地对
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* LED 进行更新（关或灭）
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*/
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#include <rtdevice.h>
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#include <rtthread.h>
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#define LD2_PIN 21
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ALIGN(RT_ALIGN_SIZE)
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static rt_uint8_t led_stack[512];
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/* 线程的 TCB 控制块 */
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static struct rt_thread led_thread;
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void rt_hw_led_init(void)
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{
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rt_pin_mode(LD2_PIN, PIN_MODE_OUTPUT);
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}
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static void led_thread_entry(void* parameter)
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{
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unsigned int count = 0;
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rt_hw_led_init();
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while (1) {
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/* led1 on */
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rt_pin_write(LD2_PIN, 1);
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rt_thread_delay(RT_TICK_PER_SECOND ); /* sleep 1 second and switch to other thread */
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/* led1 off */
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rt_pin_write(LD2_PIN, 0);
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rt_thread_delay(RT_TICK_PER_SECOND / 2);
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}
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}
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int led_sample_init(void)
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{
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rt_err_t result;
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/* init led thread */
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result = rt_thread_init(&led_thread,
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"led",
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led_thread_entry,
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RT_NULL,
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(rt_uint8_t*)&led_stack[0],
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sizeof(led_stack),
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20,
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5);
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if (result == RT_EOK) {
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rt_thread_startup(&led_thread);
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}
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return 0;
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}
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INIT_APP_EXPORT(led_sample_init);
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