ethan hong / MODSERIAL

USBUART - IRQ

Dependents:   MPU9250AHRS_UBSUART-IRQ

Fork of MODSERIAL by Andy K

Diff: GETC.cpp

Revision:
8:775f860e94d3
Parent:
1:b7e435fbfe8e
Child:
22:c11ea36f17f9
diff -r ffa4a7cb7f8d -r 775f860e94d3 GETC.cpp
--- a/GETC.cpp	Mon Nov 22 09:19:50 2010 +0000
+++ b/GETC.cpp	Mon Nov 22 09:58:34 2010 +0000
@@ -28,6 +28,14 @@
 int 
 MODSERIAL::__getc(bool block)
 {
+    // If no buffer is in use fall back to standard RX FIFO usage.
+    // Note, we must block in this case and ignore bool "block" 
+    // so as to maintain compat with Mbed Serial.
+    if (buffer_size[RxIrq] == 0 || buffer[RxIrq] == (char *)NULL) {
+        while(! MODSERIAL_RBR_HAS_DATA ) ;
+        return (int)(_RBR & 0xFF);
+    }
+
     if (block) { while ( MODSERIAL_RX_BUFFER_EMPTY ) ; } // Blocks.
     else if ( MODSERIAL_RX_BUFFER_EMPTY ) return -1;