Feature/add memap cstack usage ports (#661)

* Added memap, avstack, and checkstackusage tools to STM32F4xx Makefile and CMake builds to calculate CSTACK depth and RAM usage

* Added memap, cstack, and ram-usage recipes to stm32f10x port Makefile.  Added Cmake build.

* Removed local dlmstp.c module from stm32f10x port, and used the common datalink dlmstp.c module with MS/TP extended frames and zero-config support.

* Added .nm and .su to .gitignore to skip the analysis file residue.

ports/stm32f10x/rs485.h

@@ -36,33 +36,34 @@ extern "C" {
 
     void rs485_init(
         void);
+
     void rs485_rts_enable(
         bool enable);
+    bool rs485_rts_enabled(
+        void);
+
     bool rs485_byte_available(
         uint8_t * data_register);
     bool rs485_receive_error(
         void);
     void rs485_bytes_send(
-        uint8_t * buffer,       /* data to send */
-        uint16_t nbytes);       /* number of bytes of data */
+        uint8_t * buffer,
+        uint16_t nbytes);
+
     uint32_t rs485_baud_rate(
         void);
     bool rs485_baud_rate_set(
         uint32_t baud);
-    /* a granular approach */
-    void rs485_byte_send(
-        uint8_t data_register);
-    bool rs485_byte_sent(
-        void);
-    bool rs485_frame_sent(
-        void);
-    bool rs485_turnaround_elapsed(
-        void);
 
+    uint32_t rs485_silence_milliseconds(
+        void);
     void rs485_silence_reset(
         void);
-    bool rs485_silence_elapsed(
-        uint32_t interval);
+
+    uint32_t rs485_bytes_transmitted(
+        void);
+    uint32_t rs485_bytes_received(
+        void);
 
 #ifdef __cplusplus
 }