Correction to the ZLP fix for the STM32 F4 OTG FS driver

git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@4591 7fd9a85b-ad96-42d3-883c-3090e2eb8679

apps/system/Kconfig

@@ -2,3 +2,19 @@
 # For a description of the syntax of this configuration file,
 # see misc/tools/kconfig-language.txt.
 #
+
+menu "Custom free memory command"
+source "$APPSDIR/system/free/Kconfig"
+endmenu
+
+menu "I2C tool"
+source "$APPSDIR/system/i2c/Kconfig"
+endmenu
+
+menu "FLASH Program Installation"
+source "$APPSDIR/system/install/Kconfig"
+endmenu
+
+menu "readline() support"
+source "$APPSDIR/system/readline/Kconfig"
+endmenu

apps/system/i2c/Kconfig

@@ -2,3 +2,49 @@
 # For a description of the syntax of this configuration file,
 # see misc/tools/kconfig-language.txt.
 #
+
+#if I2C
+config I2CTOOL_BUILTIN
+	int "NSH built-in command"
+	default y
+	depends on NSH_BUILTIN_APPS
+	---help---
+		Build the tools as an NSH built-in command
+
+config I2CTOOL_MINBUS
+	int "Minimum bus number"
+	default 0
+	---help---
+		Smallest bus index supported by the hardware (default 0).
+
+config I2CTOOL_MAXBUS
+	int "Maximum bus number"
+	default 3
+	---help---
+		Largest bus index supported by the hardware (default 3)
+
+config I2CTOOL_MINADDR
+	int "Minimum I2C address"
+	default 0x03
+	---help---
+		Minium 7-bit device address (default: 0x03)
+
+config I2CTOOL_MAXADDR
+	int "Maximum I2C address"
+	default 0x77
+	---help---
+		Largest 7-bit device address (default: 0x77)
+
+config I2CTOOL_MAXREGADDR
+	int "Maximum I2C register address"
+	default 0xff
+	---help---
+		Largest I2C register address (default: 0xff)
+
+config I2CTOOL_DEFFREQ
+	int "Default I2C frequency"
+	default 4000000
+	---help---
+		Default I2C frequency (default: 4000000)
+
+#endif

apps/system/readline/Kconfig

@@ -2,3 +2,30 @@
 # For a description of the syntax of this configuration file,
 # see misc/tools/kconfig-language.txt.
 #
+
+config READLINE_ECHO
+	bool "Echo character input"
+	default y
+	---help---
+		Echo received character input back via stdout.  This is normal
+		behavior and should be selected unless the source of stdin input
+		already has local echo support or you need to suppress the back-channel
+		responses for any other reason.
+
+choice
+	prompt "Newline Options"
+	default EOL_IS_EITHER_CRLF
+
+config EOL_IS_CR
+	bool "EOL is CR"
+
+config EOL_IS_LF
+	bool "EOL is LF"
+
+config EOL_IS_BOTH_CRLF
+	bool "EOL is CR and LF"
+
+config EOL_IS_EITHER_CRLF
+	bool "EOL is CR or LF"
+
+endchoice

nuttx/arch/arm/src/stm32/stm32_otgfsdev.c

@@ -1027,6 +1027,11 @@ static void stm32_epin_request(FAR struct stm32_usbdev_s *priv,
 
   if (privreq->req.len == 0)
     {
+       /* The ZLP flag is set TRUE whenever we want to force the driver to
+        * send a zero-length-packet on the next pass through the loop (below).
+        * The flag is cleared whenever a packet is sent in the loop below.
+        */
+
        privep->zlp = true;
     }
 
@@ -1043,6 +1048,10 @@ static void stm32_epin_request(FAR struct stm32_usbdev_s *priv,
       bytesleft = privreq->req.len - privreq->req.xfrd;
       nbytes    = bytesleft;
 
+      /* Assume no zero-length-packet on the next pass through this loop */
+
+      privep->zlp = false;
+
       /* Limit the size of the transfer to one full packet and handle
        * zero-length packets (ZLPs).
        */
@@ -1053,7 +1062,6 @@ static void stm32_epin_request(FAR struct stm32_usbdev_s *priv,
            * the request.
            */
 
-          privep->zlp = false;
           if (nbytes >= privep->ep.maxpacket)
             {
               nbytes =  privep->ep.maxpacket;
@@ -1066,6 +1074,14 @@ static void stm32_epin_request(FAR struct stm32_usbdev_s *priv,
               if (bytesleft ==  privep->ep.maxpacket &&
                  (privreq->req.flags & USBDEV_REQFLAGS_NULLPKT) != 0)
                 {
+                  /* The ZLP flag is set TRUE whenever we want to force
+                   * the driver to send a zero-length-packet on the next
+                   * pass through this loop. The flag is cleared (above)
+                   * whenever we are committed to sending any packet and
+                   * set here when we want to force one more pass through
+                   * the loop.
+                   */
+
                   privep->zlp = true;
                 }
             }