PSoC™ 62 实现低功耗采集温湿度

发布于 2023-05-29 21:25:14 浏览：403 订阅该版

[tocm]

# 目的

驱动hs3003温湿度传感器，采集完数据后进入深度睡眠模式，以达到节能的目的。

# 实现步聚

1、打开rtthreadsettings, 添加hs300x模块：

![screenshot_图片.png](https://oss-club.rt-thread.org/uploads/20230530/e145c4abb1f15e92610fe997045ba635.png.webp)

2、添加初始化代码：

```c
#define HS300X_I2C_BUS  "i2c1"

int rt_hw_hs300x_port(void)
{
    struct rt_sensor_config cfg;

cfg.intf.dev_name  = HS300X_I2C_BUS;
    cfg.intf.user_data = (void *)HS300X_I2C_ADDR;

rt_hw_hs300x_init("hs300x", &cfg);

return RT_EOK;
}
INIT_ENV_EXPORT(rt_hw_hs300x_port);
```

3、修改主程序代码如下：

```c
#include <rtthread.h>
#include <rtdevice.h>
#include "sensor_renesas_hs300x.h"
#include "drv_gpio.h"

#define LED_PIN     GET_PIN(0, 0)
#define USE_SECONDS_FOR_ALARM 30
#define LONG_GLITCH_DELAY_MS        100u    /* in ms */
#define RTC_INTERRUPT_PRIORITY      3u

void set_rtc_alarm_date_time(void);
cyhal_rtc_t rtc_obj;
extern struct hs300x_device temp_humi_dev;
int main(void)
{
    cy_rslt_t result;
    float temp_f, humi_f;
    __enable_irq();
    rt_pin_mode(LED_PIN, PIN_MODE_OUTPUT);
    rt_thread_mdelay(500);
    /* Initialize RTC */
    cyhal_rtc_enable_event(&rtc_obj, CYHAL_RTC_ALARM, RTC_INTERRUPT_PRIORITY, true);
    for (;;)
    {
        rt_kprintf("Go to DeepSleep mode\r\n");

set_rtc_alarm_date_time();
        cyhal_system_delay_ms(LONG_GLITCH_DELAY_MS);

//        /* Go to deep sleep */
        cyhal_syspm_deepsleep();
        rt_kprintf("Wakeup from DeepSleep mode\r\n");
        hs300x_read_data(&temp_humi_dev, &humi_f, &temp_f);
//        /* Set the RTC generate alarm after 10 seconds */
        rt_kprintf("Temp:%2d.%df, Humi:%2d%%\r\n",(int)temp_f,(int)(temp_f*10)%10, (int)humi_f);

}
}
```

# 实验效果

```
[I/I2C] I2C bus [i2c1] registered

\ | /
- RT -     Thread Operating System
 / | \     4.1.1 build May 28 2023 12:08:51
 2006 - 2022 Copyright by RT-Thread team
[D/drv.rtc] rtc init success
[D/drv.rtc] RTC: get rtc_time 946684800
[D/drv.rtc] RTC: get rtc_time 946684800
[D/drv.rtc] RTC: get rtc_time 946684800
[I/sensor] rt_sensor[temp_hs300x] init success
[I/sensor] rt_sensor[humi_hs300x] init success
msh >Go to DeepSleep mode
Wakeup from DeepSleep mode
Temp:29.6f, Humi:77%
Go to DeepSleep mode
```

用电流表测试深度睡眠相比休眠模式少15MA左右，因为板载的DAP等其他元件在用电，所以还不能测试出来工作电路的电流情况。