Tom Soulanille / RTOS-Serial

An RTOS-friendly Serial interface Its primary benefit is that it never hogs the CPU. An amusing alternative to the traditional ring-bufferd interrupt-serviced systems, it uses short mbed-rtos queues to buffer characters to and from the UART, and a thread to service the transmitter. Short interrupt service routines enqueue received characters and signal the transmit thread when the transmitter is available. WARNING: Do not create RTOS-Serial objects before the RTOS is running! Put them inside your main() block or another function, not in the global initialization.

Dependents:   Test_RDM880_rfid_reader

Diff: rtos_serial.cpp

Revision:
7:dd892347b524
Parent:
6:438a6c0acbd4
Child:
8:3644d12758da
diff -r 438a6c0acbd4 -r dd892347b524 rtos_serial.cpp
--- a/rtos_serial.cpp	Sun Oct 20 05:36:16 2013 +0000
+++ b/rtos_serial.cpp	Mon Oct 21 22:58:04 2013 +0000
@@ -52,7 +52,11 @@
 
 int  RTOS_Serial::get_index() { return _serial.index; }
 
+#ifdef RTOS_Serial_underscore_putc
+int RTOS_Serial::_putc(int c) {
+#else
 int RTOS_Serial::putc(int c) {
+#endif
     //return Serial::putc(c); //DEBUG
     //if (tx_q.put((int *)c, osWaitForever) == osOK) return c; else return EOF;
     int status;
@@ -76,10 +80,18 @@
 }
 
 int RTOS_Serial::parent_putc(int c) {
+#ifdef RTOS_Serial_underscore_putc
+    return Serial::_putc(c);
+#else
     return Serial::putc(c);
+#endif
 }
 
+#ifdef RTOS_Serial_underscore_getc
+int RTOS_Serial::_getc() {
+#else
 int RTOS_Serial::getc() {
+#endif
     int rv;
     //return Serial::getc();  //FIXME: stand-in, which fails if we use our RX ISR
     osEvent evt = rx_q.get();
@@ -114,7 +126,7 @@
 }
 // class method
 void RTOS_Serial::UART3_TX_ISR(){
-    //uint32_t IRR = LPC_UART3->IIR;
+    //uint32_t IRR = LPC_UART3->IIR;  //DEBUG: maybe this?
     //tx_emitter_threadp->signal_set(0x1);
     tx_tp[3]->signal_set(0x01);
 }