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器件型号：LAUNCHXL-CC3235SF 主题中讨论的其他器件：CC3235SF
如上面的链接中所述、我尝试手动扫描和连接两个 CC3235SF LaunchPad 之间的 P2P 连接。
根据 swru445网络处理器指南文档中的4.5.4
要检索对等设备、请激活 WiFi Direct 扫描策略、然后有两种方法可以搜索对等设备、即调用 P2P_DEVFOUND 事件或 sl_WlanGetNetworkList API。
我尝试了两种方法来检索对等项。 我 可以 在 P2P_DEVFOUND 事件中找到附近的对等器件、但无法在 SL_WlanGetNetworkList 中找到(返回值为0)
这是我的代码。(我修改'network_termination'示例)
(WiFi 直接策略集 Role_Negotiate 和 NEG_INITIATER_RAND_BACKOFF)
/* start p2p mode */
int32_t _setP2Pparams(void)
{
int32_t ret ;
int32_t Mode;
uint8_t channels[4] = {0};
uint8_t nameLen = 0;
/* Sets role negotiations: P2P intent and negotiation initiator */
ret =
sl_WlanPolicySet(SL_WLAN_POLICY_P2P,
SL_WLAN_P2P_POLICY(
SL_WLAN_P2P_ROLE_NEGOTIATE,
SL_WLAN_P2P_NEG_INITIATOR_RAND_BACKOFF),
NULL, 0);
ASSERT_ON_ERROR(ret, WLAN_ERROR);
// connection policy for auto connection : auto, fast, anyp2p, auto provisioning(not p2p)
// ret = sl_WlanPolicySet(SL_WLAN_POLICY_CONNECTION, SL_WLAN_CONNECTION_POLICY(1, 0, 1, 0), NULL, 0);
// ret = sl_WlanPolicySet(SL_WLAN_POLICY_CONNECTION, SL_WLAN_CONNECTION_POLICY(1, 1, 0, 0), NULL, 0);
// if (ret < 0)
// {
// UART_PRINT(
// "Network Terminal - p2p wlanPolicy(connect) set fail \n");
// }
/* Set the P2P device type,
* which is a part of the discovery process. Default is 1-0050F204-1 */
ret =
sl_WlanSet(SL_WLAN_CFG_P2P_PARAM_ID, SL_WLAN_P2P_OPT_DEV_TYPE,
strlen(P2P_DEVICE_TYPE),
(const uint8_t *)P2P_DEVICE_TYPE);
ASSERT_ON_ERROR(ret, WLAN_ERROR);
/* Configure device listen and operation channels */
channels[0] = LISTEN_CHANNEL;
channels[1] = LISTEN_REGULATORY_CLASS;
channels[2] = OPRA_CHANNEL;
channels[3] = OPRA_REGULATORY_CLASS;
ret =
sl_WlanSet(SL_WLAN_CFG_P2P_PARAM_ID, SL_WLAN_P2P_OPT_CHANNEL_N_REGS,
sizeof(channels),
channels);
ASSERT_ON_ERROR(ret, WLAN_ERROR);
nameLen = sizeof(app_CB.P2P_CB.p2pDeviceName);
/* Print the device's name */
ret =
sl_NetAppGet(SL_NETAPP_DEVICE_ID, SL_NETAPP_DEVICE_URN, &nameLen,
(uint8_t*)&app_CB.P2P_CB.p2pDeviceName[0]);
ASSERT_ON_ERROR(ret, NETAPP_ERROR);
UART_PRINT("\n\r[p2pstart] : Starting NWP in P2P role..\n\r");
UART_PRINT("\n\rDevice name: %s\n\r", &app_CB.P2P_CB.p2pDeviceName);
/* Set role to P2P and perform NWP reset */
ret = sl_WlanSetMode(ROLE_P2P);
ASSERT_ON_ERROR(ret, WLAN_ERROR);
ret = sl_Stop(SL_STOP_TIMEOUT);
ASSERT_ON_ERROR(ret, DEVICE_ERROR);
Mode = sl_Start(0, 0, 0);
if(Mode != ROLE_P2P)
{
UART_PRINT(
"\r\n[p2pstart] : Failed to configure device to P2P mode...\r\n");
ASSERT_ON_ERROR(Mode, DEVICE_ERROR);
return(-1);
}
else
{
app_CB.P2P_CB.P2PsecParams.Key = (signed char *)"";
app_CB.P2P_CB.P2PsecParams.KeyLen = strlen(
(const char*)app_CB.P2P_CB.P2PsecParams.Key);
app_CB.P2P_CB.P2PsecParams.Type = SL_WLAN_SEC_TYPE_P2P_PBC;
app_CB.Role = ROLE_P2P;
}
/* enable scan policy */
_u32 intervalInSeconds = 10;
ret = sl_WlanPolicySet(SL_WLAN_POLICY_SCAN, SL_WLAN_SCAN_POLICY(1, 1), (_u8*)&intervalInSeconds, sizeof(intervalInSeconds));
if (ret < 0)
{
UART_PRINT(
"Network Terminal - p2p wlanPolicy(scan) set fail \n");
}
return(ret);
}
/* p2pscan command callback */
int32_t cmdP2PScancallback(void *arg)
{
int32_t ret = -1;
uint8_t triggeredScanTrials = 0;
ScanCmd_t ScanParams;
_u32 intervalInSeconds = 10, getIntervalTime;
_u32 length = sizeof(intervalInSeconds);
_u8 policy = 0;
/* set Scan policy */
ret = sl_WlanPolicySet(SL_WLAN_POLICY_SCAN, SL_WLAN_SCAN_POLICY(1, 1), (_u8*)&intervalInSeconds, sizeof(intervalInSeconds));
if (ret < 0)
{
UART_PRINT(
"Network Terminal - p2p wlanPolicy(scan) set fail %d\n\r", ret);
}
ret = sl_WlanPolicyGet(SL_WLAN_POLICY_SCAN, &policy, (_u8*)&getIntervalTime, (_u8*)&length);
if (ret < 0)
{
UART_PRINT(
"Network Terminal - p2p wlanPolicy(scan) get fail %d\n\r", ret);
}
if (policy && SL_WLAN_SCAN_POLICY(0, 0))
{
UART_PRINT("scan policy is set to scan disable\n\r");
}
else if (policy && SL_WLAN_SCAN_POLICY(0, 1))
{
if (policy && SL_WLAN_SCAN_POLICY(1, 1))
{
UART_PRINT("scan policy is set to scan all ssid\n\r");
}
else
{
UART_PRINT("scan policy is set to scan hidden ssid\n\r");
}
}
else if (policy && SL_WLAN_SCAN_POLICY(1, 0))
{
UART_PRINT("scan policy is set to scan visible ssid\n\r");
}
UART_PRINT("scan interval is %d\n\r", getIntervalTime);
memset(&ScanParams, 0x0, sizeof(ScanParams));
ScanParams.numOfentries = MAX_SSID_ENTRIES;
/* Clear the results buffer */
memset(&app_CB.gDataBuffer, 0x0, sizeof(app_CB.gDataBuffer));
/* Get scan results from NWP -
results would be placed inside the provided buffer */
ret = sl_WlanGetNetworkList(ScanParams.index,
ScanParams.numOfentries,
&app_CB.gDataBuffer.netEntries[ScanParams.index]);
/* If scan policy isn't set, invoking 'sl_WlanGetNetworkList()'
* for the first time triggers 'one shot' scan.
* The scan parameters would be according to the system persistent
* settings on enabled channels.
* For more information, see: <simplelink user guide, page: pr.>
*/
if(SL_ERROR_WLAN_GET_NETWORK_LIST_EAGAIN == ret)
{
while(triggeredScanTrials < MAX_SCAN_TRAILS)
{
/* We wait for one second for the NWP to complete
the initiated scan and collect results */
sleep(1);
/* Collect results form one-shot scans.*/
UART_PRINT("trigger one-shot scan\n\r");
/* Get scan results from NWP -
results would be placed inside the provided buffer */
ret = sl_WlanGetNetworkList(ScanParams.index,
ScanParams.numOfentries,
&app_CB.gDataBuffer.netEntries[ScanParams.index]);
if(ret > 0)
{
break;
}
else
{
/* If NWP results aren't ready,
try 'MAX_SCAN_TRAILS' attempts to get results */
triggeredScanTrials++ ;
}
}
}
if(ret <= 0)
{
UART_PRINT("\n\r[scan] : Unable to retrieve the network list %d\n\r", ret);
return(-1);
}
/* Print the result table */
printScanResults(ret);
return ret;
}
/* P2P_DEVFOUND event in slwlanevent handler */
case SL_WLAN_EVENT_P2P_DEVFOUND:
{
UART_PRINT("\n\r[WLAN EVENT] P2P Remote device found\n\r");
strncpy((char *)app_CB.P2P_CB.p2pPeerDeviceName, (char *)pWlanEvent->Data.P2PDevFound.GoDeviceName, pWlanEvent->Data.P2PDevFound.GoDeviceNameLen);
app_CB.P2P_CB.p2pPeerDeviceName[pWlanEvent->Data.P2PDevFound.GoDeviceNameLen] = NULL;
UART_PRINT("[WLAN EVENT] \tName: %s\n\r", app_CB.P2P_CB.p2pPeerDeviceName);
UART_PRINT("[WLAN EVENT] \tName len: %d\n\r", pWlanEvent->Data.P2PDevFound.GoDeviceNameLen);
UART_PRINT("[WLAN EVENT] \tMAC: %x:%x:%x:%x:%x:%x\n\r",
pWlanEvent->Data.P2PDevFound.Mac[0],
pWlanEvent->Data.P2PDevFound.Mac[1],
pWlanEvent->Data.P2PDevFound.Mac[2],
pWlanEvent->Data.P2PDevFound.Mac[3],
pWlanEvent->Data.P2PDevFound.Mac[4],
pWlanEvent->Data.P2PDevFound.Mac[5]);
UART_PRINT("[WLAN EVENT] \tWpsMethod: %d\n\r", pWlanEvent->Data.P2PDevFound.WpsMethod);
sem_post(&(app_CB.P2P_CB.DeviceFound));
}
我尝试使用 sl_WlanConnect 连接到找到的对等设备(上图中的 mysimplelink_bf)、但没有响应。
如何检索(使用 getnetworklist API)并连接到对等设备？ 请给我一些建议。
谢谢。
