Network Connection Troubles

[AGaru]

Hi all,

I am using a Nucleo-144 board and enabled the FreeRTOS. Afterwards i've integrated FreeRTOS+TCP sources and headers and Paho MQTT application.

I created a thread to run a MQTT Echo Server but i am having troubles connecting. This is my code:

static void prvMQTTEchoTask(void *pvParameters)

{

  printf("prvMQTTEchoTask\n\r");

/* connect to m2m.eclipse.org, subscribe to a topic, send and receive messages regularly every 1 sec */

MQTTClient client;

Network network;

unsigned char sendbuf[80], readbuf[80];

int rc = 0,

count = 0;

MQTTPacket_connectData connectData = MQTTPacket_connectData_initializer;

pvParameters = 0;

NetworkInit(&network);

printf("Network Initialized\n\r");

MQTTClientInit(&client, &network, 30000, sendbuf, sizeof(sendbuf), readbuf, sizeof(readbuf));

printf("MQTT Client Initialized\n\r");

//char* address = "iot.eclipse.org";

char* address = "0.0.0.0";

if ((rc = NetworkConnect(&network, address, 1883)) != 0)

printf("Return code from network connect is %d\n\r", rc);

#if defined(MQTT_TASK)

printf("MQTTStartTask\n\r");

if ((rc = MQTTStartTask(&client)) != pdPASS)

printf("Return code from start tasks is %d\n\r", rc);

#endif

connectData.MQTTVersion = 3;

connectData.clientID.cstring = "FreeRTOS_sample";

printf("Connection Attempt...\n\r");

if ((rc = MQTTConnect(&client, &connectData)) != 0)

printf("Return code from MQTT connect is %d\n\r", rc);

else

printf("MQTT Connected\n");

if ((rc = MQTTSubscribe(&client, "FreeRTOS/sample/#", 2, messageArrived)) != 0)

printf("Return code from MQTT subscribe is %d\n\r", rc);

while (++count)

{

MQTTMessage message;

char payload[30];

message.qos = 1;

message.retained = 0;

message.payload = payload;

sprintf(payload, "message number %d", count);

message.payloadlen = strlen(payload);

if ((rc = MQTTPublish(&client, "FreeRTOS/sample/a", &message)) != 0)

printf("Return code from MQTT publish is %d\n\r", rc);

#if !defined(MQTT_TASK)

if ((rc = MQTTYield(&client, 1000)) != 0)

printf("Return code from yield is %d\n\r", rc);

#endif

HAL_Delay(5000);

}

/* do not return */

}

I've tried passing an ip address or a name like "localhost" but it keeps giving me an error code at this point:

if ((rc = NetworkConnect(&network, address, 1883)) != 0)

printf("Return code from network connect is %d\n\r", rc);

Any suggestion? Thank you.

[AGaru]

I realized that i don't have any address set up, by running:

FreeRTOS_GetAddressConfiguration( &ulIPAddress,

                  &ulNetMask,

                  &ulGatewayAddress,

                  &ulDNSServerAddress );

 /* Convert the address to a string then print it out. */

 FreeRTOS_inet_ntoa( ulIPAddress, cBuffer );

 printf("IP Address: %s\r\n", cBuffer);

 FreeRTOS_inet_ntoa( ulNetMask, cBuffer );

 printf( "Subnet Mask: %s\r\n", cBuffer );

 FreeRTOS_inet_ntoa( ulGatewayAddress, cBuffer );

 printf( "Gateway Address: %s\r\n", cBuffer );

 FreeRTOS_inet_ntoa( ulDNSServerAddress, cBuffer );

 printf( "DNS Server Address: %s\r\n", cBuffer );

I print :

IP Address: 0.0.0.0

Subnet Mask: 0.0.0.0

Gateway Address: 0.0.0.0

DNS Server Address: 0.0.0.0

[AGaru]

I modified the code and now i print different stuff:

int main(void)

{

/* MCU Configuration--------------------------------------------------------*/

/* Reset of all peripherals, Initializes the Flash interface and the Systick. */

HAL_Init();

/* USER CODE BEGIN Init */

/* USER CODE END Init */

/* Configure the system clock */

SystemClock_Config();

/* USER CODE BEGIN SysInit */

/* USER CODE END SysInit */

/* Initialize all configured peripherals /

MX_GPIO_Init();

MX_ETH_Init();

MX_USART3_UART_Init();

MX_USB_OTG_FS_PCD_Init();

/ Initialise the RTOS’s TCP/IP stack. The tasks that use the network

are created in the vApplicationIPNetworkEventHook() hook function

below. The hook function is called when the network connects. */

FreeRTOS_IPInit( ucIPAddress,

ucNetMask,

ucGatewayAddress,

ucDNSServerAddress,

ucMACAddress );

uint32_t ulIPAddress, ulNetMask, ulGatewayAddress, ulDNSServerAddress;

int8_t cBuffer[ 16 ];

/* Create the thread(s) /

/ definition and creation of defaultTask /

//osThreadDef(defaultTask, StartDefaultTask, osPriorityNormal, 0, 128);

//defaultTaskHandle = osThreadCreate(osThread(defaultTask), NULL);

vStartMQTTTasks(ipconfigIP_TASK_STACK_SIZE_WORDS, 0);

/ USER CODE BEGIN RTOS_THREADS /

/ add threads, ... /

/ USER CODE END RTOS_THREADS /

/ The network is up and configured. Print out the configuration

obtained from the DHCP server. */

FreeRTOS_GetAddressConfiguration( &ulIPAddress,

&ulNetMask,

&ulGatewayAddress,

&ulDNSServerAddress );

/* Convert the address to a string then print it out. */

FreeRTOS_inet_ntoa( ulIPAddress, cBuffer );

printf("IP Address: %s\r\n", cBuffer);

FreeRTOS_inet_ntoa( ulNetMask, cBuffer );

printf( "Subnet Mask: %s\r\n", cBuffer );

FreeRTOS_inet_ntoa( ulGatewayAddress, cBuffer );

printf( "Gateway Address: %s\r\n", cBuffer );

FreeRTOS_inet_ntoa( ulDNSServerAddress, cBuffer );

printf( "DNS Server Address: %s\r\n", cBuffer );

/* Start scheduler /

//osKernelStart();

vTaskStartScheduler();

/ We should never get here as control is now taken by the scheduler */

/* Infinite loop /

/ USER CODE BEGIN WHILE */

while (1)

{

}

/* USER CODE END 3 */

}

Those printfs give me the following prints:

IP Address: 0.0.0.0

Subnet Mask: 255.255.255.0

Gateway Address: 10.9.23.1

DNS Server Address: 10.9.3.43

Since i initialized the arguments given to FreeRTOS_IPInit as :

static const uint8_t ucIPAddress[ 4 ] = { 10, 9, 23, 44 };

static const uint8_t ucNetMask[ 4 ] = { 255, 255, 255, 0 };

static const uint8_t ucGatewayAddress[ 4 ] = { 10, 9, 23, 1 };

static const uint8_t ucDNSServerAddress[ 4 ] = { 10, 9, 3, 43 };