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:
6:438a6c0acbd4
Parent:
5:5d388d1d7987
Child:
7:dd892347b524
--- a/rtos_serial.cpp	Sat Oct 19 06:47:12 2013 +0000
+++ b/rtos_serial.cpp	Sun Oct 20 05:36:16 2013 +0000
@@ -31,11 +31,21 @@
     rtos_serial_pointers_by_index[uart_number] = this;
     tx_emitter_threadp = new Thread(tx_emitter, (void *) this);
     tx_tp[uart_number] = tx_emitter_threadp;
-    attach(rx_isr[uart_number], RxIrq);
-    attach(tx_isr[uart_number], TxIrq);
+    rx_isr_pFP = attach(rx_isr[uart_number], RxIrq);
+    tx_isr_pFP = attach(tx_isr[uart_number], TxIrq);
     tx_emitter_threadp->signal_set(0x01);   // "prime the pump" of the tx-ready signals
 }
 
+
+RTOS_Serial::~RTOS_Serial() {
+    remove_handler(rx_isr_pFP, RxIrq);
+    remove_handler(tx_isr_pFP, TxIrq);
+    tx_emitter_threadp->terminate();
+    tx_tp[uart_number] = NULL;
+    delete tx_emitter_threadp;
+    rtos_serial_pointers_by_index[uart_number] = NULL;
+}
+
 RTOS_Serial* RTOS_Serial::rtos_serial_pointers_by_index[4] = { NULL, NULL, NULL, NULL };
 
 serial_t RTOS_Serial::get_serial() { return _serial; }