cc3200: Increment telnet Tx retry delay on every try.

cc3200/telnet/telnet.c

@@ -47,7 +47,7 @@
 // rxRindex and rxWindex must be uint8_t and TELNET_RX_BUFFER_SIZE == 256
 #define TELNET_RX_BUFFER_SIZE               256
 #define TELNET_MAX_CLIENTS                  1
-#define TELNET_TX_RETRIES_MAX               25
+#define TELNET_TX_RETRIES_MAX               50
 #define TELNET_WAIT_TIME_MS                 5
 #define TELNET_LOGIN_RETRIES_MAX            3
 #define TELNET_CYCLE_TIME_MS                (SERVERS_CYCLE_TIME_MS * 2)
@@ -493,6 +493,7 @@ static void telnet_parse_input (uint8_t *str, int16_t *len) {
 
 static bool telnet_send_with_retries (int16_t sd, const void *pBuf, int16_t len) {
     int32_t retries = 0;
+    uint32_t delay = TELNET_WAIT_TIME_MS;
     // only if we are not within interrupt context and interrupts are enabled
     if ((HAL_NVIC_INT_CTRL_REG & HAL_VECTACTIVE_MASK) == 0 && query_irq() == IRQ_STATE_ENABLED) {
         do {
@@ -503,7 +504,8 @@ static bool telnet_send_with_retries (int16_t sd, const void *pBuf, int16_t len)
             else if (SL_EAGAIN != result) {
                 return false;
             }
-            HAL_Delay (TELNET_WAIT_TIME_MS);
+            // start with the default delay and increment it on each retry
+            HAL_Delay (delay++);
         } while (++retries <= TELNET_TX_RETRIES_MAX);
     }
     return false;