Diff: arch/lpc17_emac.c

Revision:

9:59490137c7a7

Parent:

8:5754e05385b8

--- a/arch/lpc17_emac.c	Mon Aug 19 18:39:00 2013 +0300
+++ b/arch/lpc17_emac.c	Tue Sep 10 15:14:48 2013 +0300
@@ -88,6 +88,10 @@
  */
 #define TXINTGROUP (EMAC_INT_TX_UNDERRUN | EMAC_INT_TX_ERR | EMAC_INT_TX_DONE)
 
+/** \brief  Signal used for ethernet ISR to signal packet_rx() thread.
+ */
+#define RX_SIGNAL  1
+
 #else
 #define RXINTGROUP 0
 #define TXINTGROUP 0
@@ -123,7 +127,7 @@
 	struct pbuf *txb[LPC_NUM_BUFF_TXDESCS]; /**< TX pbuf pointer list, zero-copy mode */
 	u32_t lpc_last_tx_idx; /**< TX last descriptor index, zero-copy mode */
 #if NO_SYS == 0
-	sys_sem_t RxSem; /**< RX receive thread wakeup semaphore */
+	sys_thread_t RxThread; /**< RX receive thread data object pointer */
 	sys_sem_t TxCleanSem; /**< TX cleanup thread wakeup semaphore */
 	sys_mutex_t TXLockMutex; /**< TX critical section mutex */
 	sys_sem_t xTXDCountSem; /**< TX free buffer counting semaphore */
@@ -346,6 +350,7 @@
 	struct lpc_enetdata *lpc_enetif = netif->state;
 	struct pbuf *p = NULL;
 	u32_t idx, length;
+	u16_t origLength;
 
 #ifdef LOCK_RX_THREAD
 #if NO_SYS == 0
@@ -428,6 +433,7 @@
 
 			/* Zero-copy */
 			p = lpc_enetif->rxb[idx];
+			origLength = p->len;
 			p->len = (u16_t) length;
 
 			/* Free pbuf from descriptor */
@@ -440,6 +446,7 @@
     			LINK_STATS_INC(link.drop);
 
     			/* Re-queue the pbuf for receive */
+    			p->len = origLength;
     			lpc_rxqueue_pbuf(lpc_enetif, p);
 
     			LWIP_DEBUGF(UDP_LPC_EMAC | LWIP_DBG_TRACE,
@@ -780,8 +787,8 @@
 	ints = LPC_EMAC->IntStatus;
 
 	if (ints & RXINTGROUP) {
-        /* RX group interrupt(s): Give semaphore to wakeup RX receive task.*/
-        sys_sem_signal(&lpc_enetdata.RxSem);
+        /* RX group interrupt(s): Give signal to wakeup RX receive task.*/
+        osSignalSet(lpc_enetdata.RxThread->id, RX_SIGNAL);
     }
 
     if (ints & TXINTGROUP) {
@@ -807,7 +814,7 @@
 
     while (1) {
         /* Wait for receive task to wakeup */
-        sys_arch_sem_wait(&lpc_enetif->RxSem, 0);
+        osSignalWait(RX_SIGNAL, osWaitForever);
 
         /* Process packets until all empty */
         while (LPC_EMAC->RxConsumeIndex != LPC_EMAC->RxProduceIndex)
@@ -1093,9 +1100,8 @@
 	LWIP_ASSERT("TXLockMutex creation error", (err == ERR_OK));
 
 	/* Packet receive task */
-	err = sys_sem_new(&lpc_enetdata.RxSem, 0);
-	LWIP_ASSERT("RxSem creation error", (err == ERR_OK));
-	sys_thread_new("receive_thread", packet_rx, netif->state, DEFAULT_THREAD_STACKSIZE, RX_PRIORITY);
+	lpc_enetdata.RxThread = sys_thread_new("receive_thread", packet_rx, netif->state, DEFAULT_THREAD_STACKSIZE, RX_PRIORITY);
+	LWIP_ASSERT("RxThread creation error", (lpc_enetdata.RxThread));
 
 	/* Transmit cleanup task */
 	err = sys_sem_new(&lpc_enetdata.TxCleanSem, 0);