Test program for SoftSerial. TimerEvent function has bug for STM32 series Mbed. FRDM-64K works well without bug. This is a temporary solution avoid bug but not perfect.

Dependencies:   BufferedSoftSerial

Revision:
0:98865e300cd5
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/0_main.cpp	Sun May 10 08:15:36 2020 +0000
@@ -0,0 +1,87 @@
+/*
+ * Mbed Application program
+ *  SoftSerial(also BufferedSoftSerial) function test programs
+ *  UART 3 channels
+ *      (1) Mbed Serial communication line as "pc"
+ *      (2) CPU another UART channel as "ser"
+ *      (3) Software Serial channel as "dev"
+ *
+ * Copyright (c) 2020 Kenji Arai / JH1PJL
+ *  http://www7b.biglobe.ne.jp/~kenjia/
+ *  https://os.mbed.com/users/kenjiArai/
+ *      Created:    May        9th, 2020
+ *      Revised:    May       10th, 2020
+ */
+
+/*
+    Tested board on OS5.15.3
+        Nucleo-F446RE, Nucleo-L432KC
+ */
+
+//  Pre-selection --------------------------------------------------------------
+#include    "select_example.h"
+//#define EXAMPLE_0
+#ifdef EXAMPLE_0
+#warning "Select 0"
+
+//  Include --------------------------------------------------------------------
+#include "mbed.h"
+#include "BufferedSoftSerial.h"
+
+//  Definition -----------------------------------------------------------------
+#define BEFFERED    1
+    
+//  Constructor ----------------------------------------------------------------
+#if defined(TARGET_NUCLEO_L432KC)
+DigitalOut test_point(D12);
+Serial ser(D5, D4, 9600);
+#   if BEFFERED
+    BufferedSoftSerial dev(D6,D3);
+#   else
+    SoftSerial dev(D6,D3);
+#   endif
+#elif defined(TARGET_NUCLEO_F446RE)
+DigitalOut test_point(A0);
+Serial ser(D8, D2, 9600);
+#   if BEFFERED
+    BufferedSoftSerial dev(D4,D3);
+#   else
+    SoftSerial dev(D4,D3);
+#   endif
+#endif
+Serial pc(USBTX,USBRX, 9600);
+
+//  RAM ------------------------------------------------------------------------
+
+//  ROM / Constant data --------------------------------------------------------
+
+//  Function prototypes --------------------------------------------------------
+
+//------------------------------------------------------------------------------
+//  Control Program
+//------------------------------------------------------------------------------
+/*
+    UART 3 channels
+        (1) Mbed Serial communication line as "pc"
+        (2) CPU another UART channel as "ser"
+        (3) Software Serial channel as "dev"
+ */
+int main()
+{
+    int count = 0;
+    while(true) {
+        for (uint32_t i = '!'; i < '~'; i++) {
+            dev.putc(i);        // output to softserial
+            ser.putc(i);        // output to another UART
+            pc.putc(i);         // output to PC
+        }
+        dev.puts("----> ABCDEFGHIJKLMOPQRSTUVWXYZ0123456789");
+        ser.puts("----> ABCDEFGHIJKLMOPQRSTUVWXYZ0123456789");
+        pc.puts( "----> ABCDEFGHIJKLMOPQRSTUVWXYZ0123456789");
+        dev.printf("--------->%4d\r\n", count);
+        ser.printf("--------->%4d\r\n", count);
+        pc.printf( "--------->%4d\r\n", count++);
+    }
+}
+
+#endif //#ifdef EXAMPLE_0