system/indicator/main.c

void gos_app_init(void)

{

gos_result_t result;

GOS_LOG(APPLICATION_START_LINE);

// Load the system indicator settings file if necessary

if(GOS_FAILED(result, gos_load_app_settings_once("settings.ini", SETTINGS_MAGIC_NUMBER)))

{

GOS_LOG("Failed to load app settings, err:%d", result);

return;

}

// Initialize the GPIOs

// NOTE: This is not really needed,

// we could just use the variable: system.indicator.gpio

// to achieve the exact same effect.

// In the real-world, the LEDs would be in-directly connected (e.g. I/O expander)

gos_gpio_init(PLATFORM_LED1, GOS_GPIO_OUTPUT_PUSH_PULL, false);

gos_gpio_init(PLATFORM_LED2, GOS_GPIO_OUTPUT_PUSH_PULL, false);

GOS_LOG("\r\n**********************");

GOS_LOG("GPIO%d = WLAN indicator", PLATFORM_LED1);

GOS_LOG("GPIO%d = Network indicator", PLATFORM_LED2);

GOS_LOG("**********************\r\n");

// Register the WLAN indicator callback

gos_system_indicator_set_callback(GOS_SYSTEM_INDICATOR_WLAN, wlan_system_indicator_callback, (void*)PLATFORM_LED1);

// Register the Network indicator callback

gos_system_indicator_set_callback(GOS_SYSTEM_INDICATOR_NETWORK, network_system_indicator_callback, (void*)PLATFORM_LED2);

print_indicator_states("wlan");

print_indicator_states("network");

GOS_LOG("\r\nBringing up the WLAN interface which should cause the system indicators to change ...\r\n");

// Bring up the WLAN interface which should cause the system indicators to change

example_app_util_network_up(GOS_INTERFACE_WLAN, true, network_event_handler);

}

static void network_event_handler(bool is_up)

{

GOS_LOG("\r\n*** Network %s, the LEDs should be blinking differently\r\n", is_up ? "up" : "down");

GOS_LOG("Issue the command:\r\n\r\n %s\r\n\r\nTo change the state again\r\n", is_up ? "network_down" : "network_up");

}

static void wlan_system_indicator_callback(bool value, const gos_system_indicator_callback_info_t *info)

{

const gos_gpio_t gpio = (gos_gpio_t)(uint32_t)info->arg;

// NOTE: For this example the LED is directly connected, thus we could just use the variable 'system.indicator.gpio'

// In the real-world the LED would be indirectly connected, e.g. I/O expander

gos_gpio_set(gpio, value ? PLATFORM_LED_ACTIVE_STATE : !PLATFORM_LED_ACTIVE_STATE);

}

static void network_system_indicator_callback(bool value, const gos_system_indicator_callback_info_t *info)

{

const gos_gpio_t gpio = (gos_gpio_t)(uint32_t)info->arg;

// NOTE: For this example the LED is directly connected, thus we could just use the variable 'system.indicator.gpio'

// In the real-world the LED would be indirectly connected, e.g. I/O expander

gos_gpio_set(gpio, value ? PLATFORM_LED_ACTIVE_STATE : !PLATFORM_LED_ACTIVE_STATE);

}

static void print_indicator_states(const char *indicator)

{

gos_result_t result;

char cmd_buffer[64];

char response_buffer[128];

strcpy(cmd_buffer, "system.indicator.state ");

strcat(cmd_buffer, indicator);

if(GOS_FAILED(result, gos_settings_get_str(cmd_buffer, response_buffer, sizeof(response_buffer))))

{

GOS_LOG("Failed to retrieve setting: %s, err:%d", cmd_buffer, result);

}

else

{

GOS_LOG("\r\n----------------");

GOS_LOG("%s = %s", cmd_buffer, response_buffer);

GOS_LOG("\r\nTo update, issue the command:\r\n\r\n set system.indicator.state %s <config>\r\n", indicator);

GOS_LOG("----------------\r\n");

}

}