driver_dht20_read_test.c

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#include "driver_dht20_read_test.h"
 
static dht20_handle_t gs_handle;        

uint8_t dht20_read_test(uint32_t times)
{
    uint8_t res;
    uint32_t i;
    uint32_t temperature_raw;
    uint32_t humidity_raw;
    float temperature;
    uint8_t humidity;
    dht20_info_t info;
   
    /* link interface function */
    DRIVER_DHT20_LINK_INIT(&gs_handle, dht20_handle_t);
    DRIVER_DHT20_LINK_IIC_INIT(&gs_handle, dht20_interface_iic_init);
    DRIVER_DHT20_LINK_IIC_DEINIT(&gs_handle, dht20_interface_iic_deinit);
    DRIVER_DHT20_LINK_IIC_READ_CMD(&gs_handle, dht20_interface_iic_read_cmd);
    DRIVER_DHT20_LINK_IIC_WRITE_CMD(&gs_handle, dht20_interface_iic_write_cmd);
    DRIVER_DHT20_LINK_DELAY_MS(&gs_handle, dht20_interface_delay_ms);
    DRIVER_DHT20_LINK_DEBUG_PRINT(&gs_handle, dht20_interface_debug_print);
 
    /* get dht20 information */
    res = dht20_info(&info);
    if (res != 0)
    {
        dht20_interface_debug_print("dht20: get info failed.\n");
       
        return 1;
    }
    else
    {
        /* print dht20 information */
        dht20_interface_debug_print("dht20: chip is %s.\n", info.chip_name);
        dht20_interface_debug_print("dht20: manufacturer is %s.\n", info.manufacturer_name);
        dht20_interface_debug_print("dht20: interface is %s.\n", info.interface);
        dht20_interface_debug_print("dht20: driver version is %d.%d.\n", info.driver_version / 1000, (info.driver_version % 1000) / 100);
        dht20_interface_debug_print("dht20: min supply voltage is %0.1fV.\n", info.supply_voltage_min_v);
        dht20_interface_debug_print("dht20: max supply voltage is %0.1fV.\n", info.supply_voltage_max_v);
        dht20_interface_debug_print("dht20: max current is %0.2fmA.\n", info.max_current_ma);
        dht20_interface_debug_print("dht20: max temperature is %0.1fC.\n", info.temperature_max);
        dht20_interface_debug_print("dht20: min temperature is %0.1fC.\n", info.temperature_min);
    }
    
    /* start basic read test */
    dht20_interface_debug_print("dht20: start read test.\n");
    
    /* dht20 init */
    res = dht20_init(&gs_handle);
    if (res != 0)
    {
        dht20_interface_debug_print("dht20: init failed.\n");
       
        return 1;
    }
    
    /* delay 2000 ms for read */
    dht20_interface_delay_ms(2000);
    for (i = 0; i < times; i++)
    {
        /* read temperature and humidity */
        res = dht20_read_temperature_humidity(&gs_handle, (uint32_t *)&temperature_raw, (float *)&temperature, (uint32_t *)&humidity_raw, (uint8_t *)&humidity);
        if (res != 0)
        {
            dht20_interface_debug_print("dht20: read failed.\n");
            (void)dht20_deinit(&gs_handle);
           
            return 1;
        }
    
        /* print result */
        dht20_interface_debug_print("dht20: temperature: %.01fC.\n", temperature);
        dht20_interface_debug_print("dht20: humidity: %d%%.\n", humidity);
 
        /* delay 2000 ms*/
        dht20_interface_delay_ms(2000);
    }
 
    /* finish basic read test and exit */
    dht20_interface_debug_print("dht20: finish read test.\n");
    (void)dht20_deinit(&gs_handle);
    
    return 0;
}