GD32F450 看门狗驱动适配

发布于 2024-12-17 09:46:23 浏览：199 订阅该版

rt-thread 版本 V4.1.1
看门狗驱动文件修改如下：
RCU_IRC40K 需改为 RCU_IRC32K
40000 改为 32000

代码：
```
#include <board.h>

#define DBG_TAG             "drv.wdt"
#define DBG_LVL             DBG_INFO
#include <rtdbg.h>

#ifdef RT_USING_WDT

typedef struct {
    struct rt_watchdog_device wdt;
    rt_uint32_t min_threshold_s;
    rt_uint32_t max_threshold_s;
    rt_uint32_t current_threshold_s;
} gd32_wdt_device_t;

static gd32_wdt_device_t g_wdt_dev;

static rt_err_t gd32_wdt_init(rt_watchdog_t *wdt)
{
    rcu_osci_on(RCU_IRC32K);// RCU_IRC40K
    if (ERROR == rcu_osci_stab_wait(RCU_IRC32K))// RCU_IRC40K
    {
        LOG_E("failed init RCU_IRC32K clock for free watchdog.");
        return -RT_EINVAL;
    }

g_wdt_dev.min_threshold_s = 1;
    g_wdt_dev.max_threshold_s = (0xfff << 8) / 32000;
    LOG_I("threshold section [%u, %d]", \
        g_wdt_dev.min_threshold_s, g_wdt_dev.max_threshold_s);

fwdgt_write_enable();
    fwdgt_config(0xfff, FWDGT_PSC_DIV256);
    fwdgt_enable();

return 0;
}

static rt_err_t gd32_wdt_control(rt_watchdog_t *wdt, int cmd, void *arg)
{
    rt_uint32_t param;

switch (cmd)
    {
    case RT_DEVICE_CTRL_WDT_KEEPALIVE:
        fwdgt_counter_reload();
        break;
    case RT_DEVICE_CTRL_WDT_SET_TIMEOUT:
        param = *(rt_uint32_t *) arg;
        if ((param > g_wdt_dev.max_threshold_s) || \
            (param < g_wdt_dev.min_threshold_s))
        {
            LOG_E("invalid param@%u.", param);
            return -RT_EINVAL;
        }
        else
        {
            g_wdt_dev.current_threshold_s = param;
        }
        fwdgt_write_enable();
        fwdgt_config(param * 32000 >> 8, FWDGT_PSC_DIV256);
        fwdgt_write_disable();
        break;
    case RT_DEVICE_CTRL_WDT_GET_TIMEOUT:
        *(rt_uint32_t *)arg = g_wdt_dev.current_threshold_s;
        break;
    case RT_DEVICE_CTRL_WDT_START:
        fwdgt_enable();
        break;
    default:
        LOG_W("This command is not supported.");
        return -RT_ERROR;
    }

return RT_EOK;
}

static struct rt_watchdog_ops g_wdt_ops = {
    gd32_wdt_init,
    gd32_wdt_control,
};

static int rt_hw_wdt_init(void)
{
    rt_err_t ret;

g_wdt_dev.wdt.ops = &g_wdt_ops;
    /* register watchdog device */
    if (rt_hw_watchdog_register(&g_wdt_dev.wdt, "wdt", \
        RT_DEVICE_FLAG_DEACTIVATE, RT_NULL) != RT_EOK)
    {
        LOG_E("wdt device register failed.");
        return -RT_ERROR;
    }
    LOG_D("wdt device register success.");

return ret;
}
INIT_PREV_EXPORT(rt_hw_wdt_init);
#endif

```