Adding STM32F4 ETH files missed from prior commit (oops!)

Author: smaillet-ms

DeviceCode/Targets/Native/STM32F4/DeviceCode/STM32F4_ETH_lwip_OS/STM32F4_ETH_lwip_adapter.cpp

@@ -29,9 +29,8 @@ static BOOL         LinkStatus = FALSE;
 static int          nAttempts = 0;
 static BOOL         isPhyPoweringUp = FALSE;
 
-/* these define the region to zero initialize */
-extern UINT32 Image$$ER_ETHERNET$$ZI$$Base;
-extern UINT32 Image$$ER_ETHERNET$$ZI$$Length;
+extern void ZeroRxDesc();
+extern void ZeroTxDesc();
 
 extern NETWORK_CONFIG g_NetworkConfig;
 
@@ -58,9 +57,12 @@ void lwip_interrupt_continuation( void )
     STM32F4_ETH_LWIP_recv( &g_STM32F4_ETH_NetIF );
 }
 
-// MCBSTM32F400 is wired up in such a way that there is no link status 
-// interrupt available in hadware. Thus this continuation is used to 
-// poll the PHY to determine the current state at regular intervals.
+// completion used when system is wired up in such a way that there is
+// no link status interrupt available in hardware. Thus this continuation
+// is used to poll the PHY to determine the current state at regular
+// intervals.
+//
+// NOTE: 
 // This is not a recommended design for hardware as it requires waking
 // the system from sleep for polling, thus wasting power on battery
 // operated systems.
@@ -145,12 +147,8 @@ void DeInitContinuations( )
 
 void EthernetPrepareZero( )
 {
-    /* The ethernet section (TX/RX descriptors and their buffers) is in a separate memory zone
-       which is not zero initialized. It must be done manually */
-    void* base = ( void* )&Image$$ER_ETHERNET$$ZI$$Base;
-    UINT32  length = ( UINT32 )&Image$$ER_ETHERNET$$ZI$$Length;
-
-    memset( base, 0x00, length );
+    ZeroRxDesc();
+    ZeroTxDesc();
 }
 
 void EthernetWakeUp( )
@@ -211,8 +209,6 @@ int STM32F4_ETH_LWIP_Driver::Open( int index )
     return g_STM32F4_ETH_NetIF.num;
 }
 
-// -- //
-
 BOOL STM32F4_ETH_LWIP_Driver::Close( void )
 {
     CPU_INTC_DeactivateInterrupt( ETH_IRQn );

DeviceCode/Targets/Native/STM32F4/DeviceCode/STM32F4_ETH_lwip_OS/STM32F4_ETH_phy.cpp

@@ -133,7 +133,7 @@ BOOL eth_isPhyLinkValid(BOOL isCallBlocking)
     // Read status register until a valid link is detected or a timeout is elapsed
     do 
     {
-        if( !readRegister(PHY_STATUS_REGISTER, &status) )
+        if( !readRegister(PHY_STATUS_REGISTER, &status) || 0xFFFF == status )
             return FALSE;
 
         if (status & PHY_SR_LINK)

DeviceCode/Targets/Native/STM32F4/DeviceCode/STM32F4_ETH_lwip_OS/STM32F4_ETH_rx_desc.cpp

@@ -69,6 +69,13 @@ static RxDesc_t s_rxDescriptor[N_RX_DESC];      // RX descriptors
 static RxDesc_t *s_pRxDesc;                     // Pointer on the current RX descriptor
 static uint8_t s_rxBuffer[N_RX_DESC][RX_BUFFER_LENGTH]; // RX buffers
 
+void ZeroRxDesc()
+{
+    s_pRxDesc = NULL;
+    memset(s_rxDescriptor, 0, sizeof(s_rxDescriptor));
+    memset(s_rxBuffer, 0, sizeof(s_rxBuffer));
+}
+
 //--------------------------------------------------------------------------------------------
 // Local functions declarations
 //--------------------------------------------------------------------------------------------

DeviceCode/Targets/Native/STM32F4/DeviceCode/STM32F4_ETH_lwip_OS/STM32F4_ETH_tx_desc.cpp

@@ -68,6 +68,13 @@ static TxDesc_t s_txDescriptor[N_TX_DESC];      // TX descriptors
 static TxDesc_t *s_pTxDesc;                     // Pointer on the current TX descriptor
 static uint8_t s_txBuffer[N_TX_DESC][TX_BUFFER_LENGTH];
 
+void ZeroTxDesc()
+{
+    s_pTxDesc = NULL;
+    memset(s_txDescriptor, 0, sizeof(s_txDescriptor));
+    memset(s_txBuffer, 0, sizeof(s_txBuffer));
+}
+
 //--------------------------------------------------------------------------------------------
 // Functions definitions
 //--------------------------------------------------------------------------------------------