Fix ScanNetworks list

Author: mlafauci

WiFi/WiFi.cpp

@@ -152,7 +152,17 @@ uint8_t WiFiClass::encryptionType()
 
 uint8_t WiFiClass::scanNetworks()
 {
-	return WiFiDrv::scanNetworks();
+	uint8_t attempts = 10;
+	uint8_t numOfNetworks = 0;
+
+	WiFiDrv::startScanNetworks();
+ 	do
+ 	{
+ 		delay(2000);
+ 		numOfNetworks = WiFiDrv::getScanNetworks();
+ 	}
+	while (( numOfNetworks == 0)&&(--attempts>0));
+	return numOfNetworks;
 }
 
 char* WiFiClass::SSID(uint8_t networkItem)

WiFi/utility/spi_drv.cpp

@@ -399,6 +399,7 @@ int SpiDrv::waitResponse(uint8_t cmd, uint8_t* numParamRead, uint8_t** params, u
         } else
         {
             WARN("Error numParams == 0");
+            readAndCheckChar(END_CMD, &_data);
             return 0;
         }
         readAndCheckChar(END_CMD, &_data);

WiFi/utility/wifi_drv.cpp

@@ -299,7 +299,28 @@ uint8_t WiFiDrv::getCurrentEncryptionType()
     return encType;
 }
 
-uint8_t WiFiDrv::scanNetworks()
+uint8_t WiFiDrv::startScanNetworks()
+{
+	WAIT_FOR_SLAVE_SELECT();
+
+    // Send Command
+    SpiDrv::sendCmd(START_SCAN_NETWORKS, PARAM_NUMS_0);
+
+    //Wait the reply elaboration
+    SpiDrv::waitForSlaveReady();
+
+    // Wait for reply
+    uint8_t _data = 0;
+    uint8_t _dataLen = 0;
+    uint8_t result = SpiDrv::waitResponseCmd(START_SCAN_NETWORKS, PARAM_NUMS_1, &_data, &_dataLen);
+
+    SpiDrv::spiSlaveDeselect();
+
+    return result;
+}
+
+
+uint8_t WiFiDrv::getScanNetworks()
 {
 	WAIT_FOR_SLAVE_SELECT();
 

WiFi/utility/wifi_drv.h

@@ -38,7 +38,7 @@ class WiFiDrv
 public:
 
     /*
-     * Driver initialization
+     * Driver initialization
      */
     static void wifiDriverInit();
 
@@ -82,7 +82,7 @@ class WiFiDrv
     /*
      * Disconnect from the network
      *
-     * return: WL_SUCCESS or WL_FAILURE
+     * return: WL_SUCCESS or WL_FAILURE
      */
     static uint8_t disconnect();
 
@@ -156,7 +156,14 @@ class WiFiDrv
      *
      * return: Number of discovered networks
      */
-    static uint8_t scanNetworks();
+    static uint8_t startScanNetworks();
+
+    /*
+     * Get the networks available
+     *
+     * return: Number of discovered networks
+     */
+    static uint8_t getScanNetworks();
 
     /*
      * Return the SSID discovered during the network scan.

WiFi/utility/wifi_spi.h

@@ -47,6 +47,7 @@ enum {
 	GET_IDX_ENCT_CMD	= 0x33,
 	REQ_HOST_BY_NAME_CMD= 0x34,
 	GET_HOST_BY_NAME_CMD= 0x35,
+	START_SCAN_NETWORKS	= 0x36,
 
     // All command with DATA_FLAG 0x40 send a 16bit Len