This is a RS485 class that uses the second UART and was tested on a Nucleo F030R8. A main demo program howto use the class is included. This class control the direction pin on the transceiver buffer automatically, and used transmit and receive interrupts. Ring buffers (256 bytes) are implemented on both transmission and reception. It assumes a ADM3485 'type' buffer where pins 2 ans 3 are connected and seen as direction. This test program could easily be adapted as base for other programs.

Dependencies:   mbed

Revision:
3:29454cac7930
Parent:
0:044dfba47660
Child:
5:e00f46d18514
--- a/dlms_comms.h	Tue Nov 11 16:16:34 2014 +0000
+++ b/dlms_comms.h	Tue Nov 11 16:39:29 2014 +0000
@@ -20,7 +20,8 @@
                                 Timer        * parent_timer);
     bool      get_dir485       (void);
     bool      poll_rs485       (void);
-    UINT_64   ret_irq_count    (void);
+    UINT_64   ret_tx_irq_count (void);
+    UINT_64   ret_rx_irq_count (void);
 private:
     void      Rx_interrupt     (void);
     void      Tx_interrupt     (void);
@@ -29,7 +30,9 @@
     Timer     * timer;
     UINT_8      rx_buffer[256];
     UINT_8      rx_head_ptr;
-    UINT_64     irq_count;
     UINT_8      rx_tail_ptr;                           
+
+    UINT_64     tx_irq_count;
+    UINT_64     rx_irq_count;
 };
 #endif