update iotd for infrared detect

guowenxue

2021-04-22 4ff5fe054d3e9db5edf1eb8e9114729b5f7918a3

 iotd/hal/gpio.c

@@ -22,6 +22,7 @@
int gpio_init(gpio_t *gpio)
{
    int                 i;
    int                 rv;
    gpio_info_t        *gpioinfo;

    s_gpio = gpio;
@@ -59,8 +60,14 @@
            return -2;
        }

        gpiod_line_request_output(gpio->output[i].line, gpio->output[i].name, !gpio->output[i].active_level);
        if( gpiod_line_request_output(gpio->output[i].line, gpio->output[i].name, !gpio->output[i].active_level) < 0 )
        {
            log_err("gpiod request '%s' pin[#%d] output failure: %s\n", gpio->output[i].name, gpio->output[i].pin, strerror(errno));
        }
        else
        {
        log_nrml("gpiod request '%s' pin[#%d] output ok\n", gpio->output[i].name, gpio->output[i].pin);
        }
    }


@@ -75,14 +82,19 @@
        }

        if( gpio->output[i].active_level )
            rv = gpiod_line_request_rising_edge_events(gpio->input[i].line, gpio->input[i].name) ;
        else
            rv = gpiod_line_request_falling_edge_events(gpio->input[i].line, gpio->input[i].name) ;

        if( rv < 0 )
        {
            gpiod_line_request_rising_edge_events(gpio->input[i].line, gpio->input[i].name);
            log_nrml("gpiod request '%s' pin[#%d] for rising edge event ok\n", gpio->input[i].name, gpio->input[i].pin);
            log_err("gpiod request '%s' pin[#%d] event edge [%s] failure: %s\n", 
                    gpio->input[i].name, gpio->input[i].pin, gpio->output[i].active_level?"rising":"falling", strerror(errno));
        }
        else
        {
            gpiod_line_request_falling_edge_events(gpio->input[i].line, gpio->input[i].name);
            log_nrml("gpiod request '%s' pin[#%d] for falling edge event ok\n", gpio->input[i].name, gpio->input[i].pin);
            log_nrml("gpiod request '%s' pin[#%d] event edge [%s] ok\n", 
                    gpio->input[i].name, gpio->input[i].pin, gpio->output[i].active_level?"rising":"falling");
        }
    }
}
@@ -146,41 +158,55 @@
    return ;
}

#define MS_NANOSEC  (1*1000*1000)

/* Return value: 1(HIGH): Sombody detected  0(LOW): Nobody detected */
int infrared_detect(void)
/* Return value: 0(LOW): Nobody detected, !0: indoor or hallway detected */
int infrared_detect(int interval)
{
    int                      i;
    int                      rv;
    int                      rv = 0;
    int                      res = 0;
    struct gpiod_line_event  event;
    int                      event_type;
    struct timespec          ts = { 0, interval*MS_NANOSEC }; /* second and nanoseconds,  */

    for(i=0; i<s_gpio->incnt; i++)
    {
        if( strstr(s_gpio->input[i].name, "infrared"))
        {
            log_dbg("Start detect '%s' on pin[#%d]\n", s_gpio->input[i].name, s_gpio->input[i].pin);

            /* This function will block, must call it to setup */
            rv = gpiod_line_event_wait(s_gpio->input[i].line, NULL) ;
            rv = gpiod_line_event_wait(s_gpio->input[i].line, &ts);
            if( rv< 0 )
            {
                log_err("infrared gpiod line wait event failure!\n");
                //log_err("infrared gpiod line wait[%s] event failure!\n", s_gpio->input[i].name);
                return 0;
            }
            log_err("infrared gpiod line wait event rv=%d!\n", rv);

            /* This function will block, must read to clear the event  */
            if (gpiod_line_event_read(s_gpio->input[i].line, &event) < 0)
            else if( rv == 0 )
            {
                log_err("gpiod line event read failure!\n");
                return 0;
                //log_dbg("infrared gpiod line[%s] wait event timeout\n", s_gpio->input[i].name);
                continue;
            }

            if (event.event_type == GPIOD_LINE_EVENT_RISING_EDGE)
                return 1;
            else
                return 0;
            /* Must read to clear the event */
            rv = gpiod_line_event_read(s_gpio->input[i].line, &event);

            event_type = s_gpio->input[i].active_level? GPIOD_LINE_EVENT_RISING_EDGE : GPIOD_LINE_EVENT_FALLING_EDGE;

            if ( event.event_type == event_type )
            {
                if( strstr(s_gpio->input[i].name, "indoor") )
                {
                    res |= FLAG_INFRARED_INDOOR;
                }
                else if( strstr(s_gpio->input[i].name, "hallway") )
                {
                    res |= FLAG_INFRARED_HALLWAY;
        }
    }

        }
    }

    return res; 
}