NXP MCXA156测评之 HWTIMER

发布于 2025-02-26 22:46:43 浏览：12 订阅该版

这是第二次使用NXP开发板进行测试
MCXA156开发板上一共有4个CTimer定时器，每一路均支持捕获和输出模式

![screenshot_图片.png](https://oss-club.rt-thread.org/uploads/20250226/979b7f2a17d8c467978e1b7b2c39c237.png.webp)
打开使能CTIMER驱动，保存配置退出menuconfig
![screenshot_图片.png](https://oss-club.rt-thread.org/uploads/20250226/8bae0101513479246a43aa3d1e20155a.png.webp)

拉取更新软件包，并导出MDK5工程，最后编译修改工程
pkgs --update

![screenshot_图片.png](https://oss-club.rt-thread.org/uploads/20250226/6f899e7ce0648ba1e8594b754617cbb2.png)

scons --target=mdk5

![screenshot_图片.png](https://oss-club.rt-thread.org/uploads/20250226/d74a5ea135a1a39ec2d1f6f78ed716f5.png)

打开MDK5工程，添加测试例子
#define HWTIMER_DEV_NAME   "timer0"

static rt_err_t timeout_cb(rt_device_t dev, rt_size_t size)
{
    rt_kprintf("this is hwtimer timeout callback fucntion!\n");
    rt_kprintf("tick is :%d !\n", rt_tick_get());

return 0;
}

static int hwtimer_sample(int argc, char *argv[])
{
    rt_err_t ret = RT_EOK;
    rt_hwtimerval_t timeout_s;     
    rt_device_t hw_dev = RT_NULL;   
    rt_hwtimer_mode_t mode;        
    rt_uint32_t freq = 2000000;

hw_dev = rt_device_find(HWTIMER_DEV_NAME);
    if (hw_dev == RT_NULL)
    {
        rt_kprintf("hwtimer sample run failed! can't find %s device!\n", HWTIMER_DEV_NAME);
        return RT_ERROR;
    }

ret = rt_device_open(hw_dev, RT_DEVICE_OFLAG_RDWR);
    if (ret != RT_EOK)
    {
        rt_kprintf("open %s device failed!\n", HWTIMER_DEV_NAME);
        return ret;
    }

rt_device_set_rx_indicate(hw_dev, timeout_cb);

rt_device_control(hw_dev, HWTIMER_CTRL_FREQ_SET, &freq);

mode = HWTIMER_MODE_PERIOD;
    ret = rt_device_control(hw_dev, HWTIMER_CTRL_MODE_SET, &mode);
    if (ret != RT_EOK)
    {
        rt_kprintf("set mode failed! ret is :%d\n", ret);
        return ret;
    }

timeout_s.sec = 5;     
    timeout_s.usec = 0;     
    if (rt_device_write(hw_dev, 0, &timeout_s, sizeof(timeout_s)) != sizeof(timeout_s))
    {
        rt_kprintf("set timeout value failed\n");
        return RT_ERROR;
    }

rt_thread_mdelay(3500);

rt_device_read(hw_dev, 0, &timeout_s, sizeof(timeout_s));
    rt_kprintf("Read: Sec = %d, Usec = %d\n", timeout_s.sec, timeout_s.usec);

return ret;
}

MSH_CMD_EXPORT(hwtimer_sample, hwtimer sample);

![screenshot_图片.png](https://oss-club.rt-thread.org/uploads/20250226/93c13e877b5bd0e1480989b74a786b89.png.webp)

目前定时器测试会死机