Amanda Travieso / MODSERIAL

Export for Dan

Fork of MODSERIAL by Andy K

Diff: ISR_TX.cpp

Revision:
8:775f860e94d3
Parent:
6:c8f77fe1cc10
Child:
12:8c7394e2ae7f
--- a/ISR_TX.cpp	Mon Nov 22 09:19:50 2010 +0000
+++ b/ISR_TX.cpp	Mon Nov 22 09:58:34 2010 +0000
@@ -28,7 +28,10 @@
 void 
 MODSERIAL::isr_tx(bool doCallback)
 {
-    if (! _base ) return;
+    if (! _base || buffer_size[TxIrq] == 0 || buffer[TxIrq] == (char *)NULL) {
+        _isr[TxIrq].call(); 
+        return;
+    }
     
     while (! MODSERIAL_TX_BUFFER_EMPTY && MODSERIAL_THR_HAS_SPACE ) {
         _THR = txc = (uint8_t)(buffer[TxIrq][buffer_out[TxIrq]]);