Squashed commit of the following:

arch/arm/src/max326xx/max32660/max32660_clockconfig.c: Fix an error in a register name.

    arm/src/max326xx/max32660:  Fix a few new compilation errors when DEBUG is enabled.

arch/arm/src/max326xx/max32660/max32660_clockconfig.c

@@ -155,7 +155,7 @@ static void max326_enable_hfio(FAR const struct clock_setup_s *clksetup)
 
       /* Wait for the oscillator to become ready */
 
-      while ((getreg32(GCR_CLKCTRL_HIRCRDY) & GCR_CLKCTRL_HIRCRDY) == 0)
+      while ((getreg32(MAX326_GCR_CLKCTRL) & GCR_CLKCTRL_HIRCRDY) == 0)
         {
         }
     }

arch/arm/src/max326xx/max32660/max32660_lowputc.c

@@ -343,10 +343,6 @@ void max326_uart_configure(uintptr_t base,
   ctrl0 |= UART_CTRL0_TOCNT(4);
   putreg32(ctrl0, base + MAX326_UART_CTRL0_OFFSET);
 
-  /* Enable trigger events */
-
-  DEBUGASSERT(config->)
-
   /* Setup configuration and enable UART */
 
   ctrl0 &= ~UART_CTRL0_SIZE_MASK;

arch/arm/src/max326xx/max32660/max32660_serial.c

@@ -126,6 +126,12 @@
 #define UART_INT_RXERRORS      (UART_INT_FRAME | UART_INT_PARITY | \
                                 UART_INT_RXOVR)
 
+#ifdef CONFIG_DEBUG_FEATURES
+#  define UART_INT_ALL         (UART_INT_TX | UART_INT_RX | UART_INT_RXERRORS)
+#else
+#  define UART_INT_ALL         (UART_INT_TX | UART_INT_RX)
+#endif
+
 /****************************************************************************
  * Private Types
  ****************************************************************************/
@@ -519,7 +525,8 @@ static int max326_interrupt(int irq, void *context, FAR void *arg)
       /* Read and clear FIFO interrupt status */
 
       regval = max326_serialin(priv, MAX326_UART_STAT_OFFSET);
-      max326_serialout(priv, MAX326_UART_STAT_OFFSET, regval);
+      max326_serialout(priv, MAX326_UART_STAT_OFFSET,
+                       regval & UART_INT_ALL);
 
       /* Handle incoming, receive bytes.
        * Check if the received FIFO is not empty.
@@ -548,10 +555,11 @@ static int max326_interrupt(int irq, void *context, FAR void *arg)
 #ifdef CONFIG_DEBUG_FEATURES
       /* Check for RX error conditions */
 
-      if ((regval & MAX326_INT_RXERRORS) != 0)
+      if ((regval & UART_INT_RXERRORS) != 0)
         {
           /* And now do... what?  Should we reset FIFOs on a FIFO error? */
 #warning Misssing logic
+
         }
 #endif
     }

configs/max32660-evsys/README.txt

@@ -88,6 +88,9 @@ Buttons
 OpenOCD
 =======
 
+Starting OpenOCD
+----------------
+
   An Eclipse based toolchain is available for download from Maxim Integrated.
   If you (like me) are not an IDE user then the good news is the OpenOCD for
   the MAX32660 is available within that toolchain.
@@ -110,4 +113,29 @@ OpenOCD
     IFCFG="C:\Maxim\Toolchain\share\openocd\scripts\interface\max32660_hdk.cfg"
     MCUCFG="C:\Maxim\Toolchain\share\openocd\scripts\target\max32660.cfg"
 
-    ${OPENOCD} -f ${IFCFG} -f ${MCUCFG}
+    ${OPENOCD} ${1} -f ${IFCFG} # -f ${MCUCFG}
+
+Loading Code:
+
+  Code can be loaded into FLASH using the convenient ARM MBED drag'n'drop
+  interface.  Or it can be loaded using GDB as follows:
+
+  $ arm-none-eabi-gdb
+  (gdb) target remote localhost:3333
+  (gdb) mon reset
+  (gdb) mon halt
+  (gdb) load nuttx
+
+  This does not work so reliably for me, however.
+
+Debugging:
+
+  $ arm-none-eabi-gdb
+  (gdb) target remote localhost:3333
+  (gdb) mon reset
+  (gdb) mon reg pc 0x11c
+  (gdb) file nuttx
+  (gdb) b os_start
+  (gdb) c
+
+  Also not very reliable.