Diff: WIZnetInterface/WIZnet/W5200.cpp

Revision:

9:cb8808b47e69

Parent:

1:8138a268fbd2

--- a/WIZnetInterface/WIZnet/W5200.cpp	Sun May 31 10:06:41 2015 +0000
+++ b/WIZnetInterface/WIZnet/W5200.cpp	Sun May 31 10:25:40 2015 +0000
@@ -102,6 +102,18 @@
     return true;
 }
 
+
+bool WIZnet_Chip::is_fin_received(int socket)
+{
+    uint8_t tmpSn_SR;
+    tmpSn_SR = sreg<uint8_t>(socket, Sn_SR);
+    // packet sending is possible, when state is SOCK_CLOSE_WAIT.
+    if (tmpSn_SR == SOCK_CLOSE_WAIT) {
+        return true;
+    }
+    return false;
+}
+
 bool WIZnet_Chip::gethostbyname(const char* host, uint32_t* ip)
 {
     uint32_t addr = str_to_ip(host);
@@ -171,7 +183,15 @@
     t.reset();
     t.start();
     while(1) {
-        int size = sreg<uint16_t>(socket, Sn_RX_RSR);
+        //int size = sreg<uint16_t>(socket, Sn_RX_RSR);
+        // during the reading Sn_RX_RXR, it has the possible change of this register.
+        // so read twice and get same value then use size information.
+        int size, size2;
+        do {
+            size = sreg<uint16_t>(socket, Sn_RX_RSR);
+            size2 = sreg<uint16_t>(socket, Sn_RX_RSR);
+        } while (size != size2);
+
         if (size > req_size) {
             return size;
         }
@@ -191,7 +211,15 @@
     t.reset();
     t.start();
     while(1) {
-        int size = sreg<uint16_t>(socket, Sn_TX_FSR);
+        //int size = sreg<uint16_t>(socket, Sn_TX_FSR);
+        // during the reading Sn_TX_FSR, it has the possible change of this register.
+        // so read twice and get same value then use size information.
+        int size, size2;
+        do {
+            size = sreg<uint16_t>(socket, Sn_TX_FSR);
+            size2 = sreg<uint16_t>(socket, Sn_TX_FSR);
+        } while (size != size2);
+        
         if (size > req_size) {
             return size;
         }