Diff: WIZnet/W5500.cpp

Revision:

3:a5d99521e9cc

Parent:

2:e02950866c42

Child:

5:8aefaef88f79

--- a/WIZnet/W5500.cpp	Wed Aug 20 05:09:16 2014 +0000
+++ b/WIZnet/W5500.cpp	Wed Aug 20 05:37:05 2014 +0000
@@ -169,7 +169,6 @@
 
 int WIZnet_Chip::wait_readable(int socket, int wait_time_ms, int req_size)
 {
-    int size, size2;
     if (socket < 0) {
         return -1;
     }
@@ -177,7 +176,14 @@
     t.reset();
     t.start();
     while(1) {
-        int size = sreg<uint16_t>(socket, Sn_RX_RSR);
+        //int size = sreg<uint16_t>(socket, Sn_RX_RSR);
+        int size, size2;
+        // during the reading Sn_RX_RSR, it has the possible change of this register.
+        // so read twice and get same value then use size information.
+        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 +197,6 @@
 
 int WIZnet_Chip::wait_writeable(int socket, int wait_time_ms, int req_size)
 {
-    int size, size2;
     if (socket < 0) {
         return -1;
     }
@@ -200,6 +205,7 @@
     t.start();
     while(1) {
         //int size = sreg<uint16_t>(socket, Sn_TX_FSR);
+        int size, size2;
         // 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.
         do {