Richard Sewell
This is the SerialBuffered class, which wraps Serial and adds interrupt-powered buffered reading (so it will catch inbound data even when your app is busy doing something else) and simple read timeouts. There's a tiny demo app in there too.
Diff: main.cpp
- Revision:
- 0:b55ca3bb8017
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Wed Nov 18 21:27:15 2009 +0000
@@ -0,0 +1,67 @@
+#include "mbed.h"
+#include "SerialBuffered.h"
+
+Serial loggerSerial(USBTX, USBRX);
+
+// run this with p13 joined to p14 to test the SerialBuffered class
+
+int main() {
+
+ SerialBuffered *b = new SerialBuffered( 1001, p13, p14);
+
+ b->baud( 112500 );
+ b->setTimeout( 0.1 );
+
+ // write a bufferful
+ for( int i = 0; i < 1000; i ++ )
+ {
+ b->putc( i % 0xff );
+ }
+
+ // and check it all arrived
+ for( int i = 0; i < 1000; i ++ )
+ {
+ uint8_t j = b->getc();
+ if( j != i % 0xff )
+ {
+ loggerSerial.printf("Bad byte %x at %x\r\n", j, i );
+ break;
+ }
+
+ }
+
+ // write another bufferful
+ for( int i = 0; i < 1000; i ++ )
+ {
+ b->putc( i % 0xff );
+ }
+
+ // and check it arrived too, to confirm the circular buffer is working
+ for( int i = 0; i < 1000; i ++ )
+ {
+ uint8_t j = b->getc();
+ if( j != i % 0xff )
+ {
+ loggerSerial.printf("Bad byte %x at %x\r\n", j, i );
+ break;
+ }
+ }
+
+ // write another bufferful, deliberately short
+ for( int i = 0; i < 999; i ++ )
+ {
+ b->putc( i % 0xff );
+ }
+
+
+ // and read it back with readBytes
+ b->setTimeout( 5 ); // set a long timeout so we can see we are waiting for it
+
+
+ uint8_t *buff = (uint8_t*) malloc( 1000 );
+ int nRead = b->readBytes( buff, 1000 );
+
+ loggerSerial.printf("readBytes got %d\r\n", nRead );
+
+ loggerSerial.printf("Done\r\n");
+}