From 4303ec02b1756b3b931ebdf636d882beffe13022 Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Mon, 15 Jul 2013 17:50:17 -0600
Subject: [PATCH] Zmodem utilities can now be built for Linux; Fix some
configuration confusion
---
ChangeLog.txt | 3 +
include/zmodem.h | 8 +-
system/zmodem/.gitignore | 4 +
system/zmodem/Kconfig | 6 -
system/zmodem/Makefile.host | 92 +++++++++++++
system/zmodem/host/apps/.gitignore | 2 +
system/zmodem/host/crc16.c | 138 +++++++++++++++++++
system/zmodem/host/crc16.h | 83 ++++++++++++
system/zmodem/host/crc32.c | 123 +++++++++++++++++
system/zmodem/host/crc32.h | 83 ++++++++++++
system/zmodem/host/debug.h | 69 ++++++++++
system/zmodem/host/nuttx/ascii.h | 202 ++++++++++++++++++++++++++++
system/zmodem/host/nuttx/compiler.h | 167 +++++++++++++++++++++++
system/zmodem/host/nuttx/config.h | 91 +++++++++++++
system/zmodem/zm.h | 1 +
system/zmodem/zm_send.c | 4 +-
16 files changed, 1064 insertions(+), 12 deletions(-)
create mode 100755 system/zmodem/Makefile.host
create mode 100644 system/zmodem/host/apps/.gitignore
create mode 100644 system/zmodem/host/crc16.c
create mode 100644 system/zmodem/host/crc16.h
create mode 100644 system/zmodem/host/crc32.c
create mode 100644 system/zmodem/host/crc32.h
create mode 100644 system/zmodem/host/debug.h
create mode 100644 system/zmodem/host/nuttx/ascii.h
create mode 100644 system/zmodem/host/nuttx/compiler.h
create mode 100644 system/zmodem/host/nuttx/config.h
diff --git a/ChangeLog.txt b/ChangeLog.txt
index 0029d0ca8..7800c837c 100644
--- a/ChangeLog.txt
+++ b/ChangeLog.txt
@@ -610,3 +610,6 @@
* apps/system/zmodem: The 'rz' command is now complete and functional
under certain conditaions. There are, however, some data overrun
issues that I am still uncertain how should be handled (2012-7-15).
+ * apps/system/zmodem/Makefile.host and host/: The Zmodem utilities
+ can now be built to execute on a Linux host.
+
diff --git a/include/zmodem.h b/include/zmodem.h
index d249875ad..98eedcb2a 100644
--- a/include/zmodem.h
+++ b/include/zmodem.h
@@ -112,8 +112,8 @@
* in the code now!
*/
-#ifndef CONFIG_SYSTEM_ZMODEM_MOUNTPOINT
-# warning CONFIG_SYSTEM_ZMODEM_RCVSAMPLE not yet support
+#ifdef CONFIG_SYSTEM_ZMODEM_RCVSAMPLE
+# warning CONFIG_SYSTEM_ZMODEM_RCVSAMPLE not yet supported
# undef CONFIG_SYSTEM_ZMODEM_RCVSAMPLE
#endif
@@ -124,8 +124,8 @@
* in the code now!
*/
-#ifndef CONFIG_SYSTEM_ZMODEM_SENDATTN
-# warning CONFIG_SYSTEM_ZMODEM_SENDATTN not yet support
+#ifdef CONFIG_SYSTEM_ZMODEM_SENDATTN
+# warning CONFIG_SYSTEM_ZMODEM_SENDATTN not yet supported
# undef CONFIG_SYSTEM_ZMODEM_SENDATTN
#endif
diff --git a/system/zmodem/.gitignore b/system/zmodem/.gitignore
index fa1ec7579..01a12bcb2 100644
--- a/system/zmodem/.gitignore
+++ b/system/zmodem/.gitignore
@@ -9,3 +9,7 @@
/*.adb
/*.lib
/*.src
+/*.exe
+sz
+rz
+
diff --git a/system/zmodem/Kconfig b/system/zmodem/Kconfig
index 120aa702b..7ec838efc 100644
--- a/system/zmodem/Kconfig
+++ b/system/zmodem/Kconfig
@@ -106,12 +106,6 @@ config SYSTEM_ZMODEM_SENDATTN
---help---
Send attention string not yet supported
-config SYSTEM_ZMODEM_FULLSTREAMING
- bool "Full streaming"
- default n
- ---help---
- Full streaming is not yet supported
-
config SYSTEM_ZMODEM_SENDBRAK
bool "Can break"
default n
diff --git a/system/zmodem/Makefile.host b/system/zmodem/Makefile.host
new file mode 100755
index 000000000..00f28ecec
--- /dev/null
+++ b/system/zmodem/Makefile.host
@@ -0,0 +1,92 @@
+############################################################################
+# apps/system/zmodem/Makefile.host
+#
+# Copyright (C) 2013 Gregory Nutt. All rights reserved.
+# Author: Gregory Nutt <gnutt@nuttx.org>
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# 1. Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in
+# the documentation and/or other materials provided with the
+# distribution.
+# 3. Neither the name NuttX nor the names of its contributors may be
+# used to endorse or promote products derived from this software
+# without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+#
+############################################################################
+# TOPDIR and APPDIR must be defined on the make command line
+
+-include $(TOPDIR)/.config
+-include $(TOPDIR)/Make.defs
+include $(APPDIR)/Make.defs
+
+NUTTXINC = $(TOPDIR)/include
+APPSINC = $(APPDIR)/include
+
+ZMODEM = $(APPDIR)/system/zmodem
+HOSTDIR = $(ZMODEM)/host
+HOSTAPPS = $(ZMODEM)/host/apps
+
+HOSTCFLAGS += -isystem $(HOSTDIR) -I $(ZMODEM)
+HOSTCFLAGS += -Dsz_main=main -Drz_main=main
+ifeq ($(CONFIG_DEBUG),y)
+HOSTCFLAGS += -DCONFIG_DEBUG_ZMODEM=1 -DCONFIG_SYSTEM_ZMODEM_DUMPBUFFER=1
+endif
+
+# Zmodem sz and rz commands
+
+SZSRCS = sz_main.c zm_send.c
+RZSRCS = rz_main.c zm_receive.c
+CMNSRCS = zm_state.c zm_proto.c zm_watchdog.c zm_utils.c zm_dumpbuffer.c
+CMNSRCS += crc16.c crc32.c
+SRCS = $(SZSRCS) $(RZSRCS) $(CMNSRCS)
+
+SZOBJS = $(SZSRCS:.c=$(OBJEXT))
+RZOBJS = $(RZSRCS:.c=$(OBJEXT))
+CMNOBJS = $(CMNSRCS:.c=$(OBJEXT))
+OBJS = $(SRCS:.c=$(OBJEXT))
+
+RZBIN = rz$(EXEEXT)
+SZBIN = sz$(EXEEXT)
+
+VPATH = host
+
+all: $(RZBIN) $(SZBIN)
+.PHONY: clean
+
+$(OBJS): %$(OBJEXT): %.c
+ $(Q) $(HOSTCC) -c $(HOSTCFLAGS) -o $@ $<
+
+$(HOSTAPPS)/zmodem.h: $(APPSINC)/zmodem.h
+ $(Q) cp $(APPSINC)/zmodem.h $(HOSTAPPS)/zmodem.h
+
+$(RZBIN): $(HOSTAPPS)/zmodem.h $(RZOBJS) $(CMNOBJS)
+ $(Q) $(HOSTCC) $(HOSTCFLAGS) -o $@ $(RZOBJS) $(CMNOBJS)
+
+$(SZBIN): $(HOSTAPPS)/zmodem.h $(SZOBJS) $(CMNOBJS)
+ $(Q) $(HOSTCC) $(HOSTCFLAGS) -o $@ $(SZOBJS) $(CMNOBJS)
+
+clean:
+ifneq ($(OBJEXT),)
+ rm -f *$(OBJEXT)
+endif
+ rm -f $(RZBIN) $(SZBIN)
+ rm -f $(HOSTAPPS)/zmodem.h
diff --git a/system/zmodem/host/apps/.gitignore b/system/zmodem/host/apps/.gitignore
new file mode 100644
index 000000000..44dfc6691
--- /dev/null
+++ b/system/zmodem/host/apps/.gitignore
@@ -0,0 +1,2 @@
+zmodem.h
+
diff --git a/system/zmodem/host/crc16.c b/system/zmodem/host/crc16.c
new file mode 100644
index 000000000..f37609996
--- /dev/null
+++ b/system/zmodem/host/crc16.c
@@ -0,0 +1,138 @@
+/************************************************************************************************
+ * apps/system/zmodem/host/crc16.c
+ *
+ * This file is a part of NuttX:
+ *
+ * Copyright (C) 2013 Gregory Nutt. All rights reserved.
+ * Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * References:
+ *
+ * crc16_tab calculated by Mark G. Mendel, Network Systems Corporation.
+ * crc16part() logic derived from article Copyright (C) 1986 Stephen Satchell.
+ *
+ * "Programmers may incorporate any or all code into their programs,
+ * giving proper credit within the source. Publication of the
+ * source routines is permitted so long as proper credit is given
+ * to Stephen Satchell, Satchell Evaluations and Chuck Forsberg,
+ * Omen Technology."
+ *
+ * Re-released under the Modified BSD license which, I believe, is consistent with the
+ * original authors' intent:
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ * used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ************************************************************************************************/
+
+/************************************************************************************************
+ * Included Files
+ ************************************************************************************************/
+
+#include <sys/types.h>
+#include <stdint.h>
+#include <crc16.h>
+
+/************************************************************************************************
+ * Private Data
+ ************************************************************************************************/
+
+/* crc16_tab calculated by Mark G. Mendel, Network Systems Corporation */
+
+static uint16_t crc16_tab[256] =
+{
+ 0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7,
+ 0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef,
+ 0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6,
+ 0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de,
+ 0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485,
+ 0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d,
+ 0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4,
+ 0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc,
+ 0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823,
+ 0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b,
+ 0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12,
+ 0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a,
+ 0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41,
+ 0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49,
+ 0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70,
+ 0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78,
+ 0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f,
+ 0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067,
+ 0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e,
+ 0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256,
+ 0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d,
+ 0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
+ 0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c,
+ 0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634,
+ 0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab,
+ 0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3,
+ 0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a,
+ 0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92,
+ 0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9,
+ 0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1,
+ 0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8,
+ 0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0
+};
+
+#define updcrc(cp, crc) ( crc16_tab[((crc >> 8) & 255)] ^ (crc << 8) ^ cp)
+
+/************************************************************************************************
+ * Public Functions
+ ************************************************************************************************/
+/************************************************************************************************
+ * Name: crc16part
+ *
+ * Description:
+ * Continue CRC calculation on a part of the buffer.
+ *
+ ************************************************************************************************/
+
+uint16_t crc16part(const uint8_t *src, size_t len, uint16_t crc16val)
+{
+ size_t i;
+
+ for (i = 0; i < len; i++)
+ {
+ crc16val = crc16_tab[((crc16val >> 8) & 255)] ^ (crc16val << 8) ^ src[i];
+ }
+
+ return crc16val;
+}
+
+/************************************************************************************************
+ * Name: crc16
+ *
+ * Description:
+ * Return a 16-bit CRC of the contents of the 'src' buffer, length 'len'
+ *
+ ************************************************************************************************/
+
+uint16_t crc16(const uint8_t *src, size_t len)
+{
+ return crc16part(src, len, 0);
+}
diff --git a/system/zmodem/host/crc16.h b/system/zmodem/host/crc16.h
new file mode 100644
index 000000000..7e0ac5e85
--- /dev/null
+++ b/system/zmodem/host/crc16.h
@@ -0,0 +1,83 @@
+/****************************************************************************
+ * apps/system/zmodem/host/crc16.h
+ *
+ * Copyright (C) 2013 Gregory Nutt. All rights reserved.
+ * Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ * used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+#ifndef __APPS_SYSTEM_ZMODEM_HOST_CRC16_H
+#define __APPS_SYSTEM_ZMODEM_HOST_CRC16_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <sys/types.h>
+#include <stdint.h>
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+#ifdef __cplusplus
+#define EXTERN extern "C"
+extern "C"
+{
+#else
+#define EXTERN extern
+#endif
+
+/****************************************************************************
+ * Name: crc16part
+ *
+ * Description:
+ * Continue CRC calculation on a part of the buffer.
+ *
+ ****************************************************************************/
+
+uint16_t crc16part(const uint8_t *src, size_t len, uint16_t crc16val);
+
+/****************************************************************************
+ * Name: crc16
+ *
+ * Description:
+ * Return a 16-bit CRC of the contents of the 'src' buffer, length 'len'
+ *
+ ****************************************************************************/
+
+uint16_t crc16(const uint8_t *src, size_t len);
+
+#undef EXTERN
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __APPS_SYSTEM_ZMODEM_HOST_CRC16_H */
diff --git a/system/zmodem/host/crc32.c b/system/zmodem/host/crc32.c
new file mode 100644
index 000000000..01b92a32c
--- /dev/null
+++ b/system/zmodem/host/crc32.c
@@ -0,0 +1,123 @@
+/************************************************************************************************
+ * apps/system/zmodem/host/crc32.c
+ *
+ * This file is a part of NuttX:
+ *
+ * Copyright (C) 2013 Gregory Nutt. All rights reserved.
+ *
+ * The logic in this file was developed by Gary S. Brown:
+ *
+ * COPYRIGHT (C) 1986 Gary S. Brown. You may use this program, or code or tables
+ * extracted from it, as desired without restriction.
+ *
+ * First, the polynomial itself and its table of feedback terms. The polynomial is:
+ *
+ * X^32+X^26+X^23+X^22+X^16+X^12+X^11+X^10+X^8+X^7+X^5+X^4+X^2+X^1+X^0
+ *
+ * Note that we take it "backwards" and put the highest-order term in the lowest-order bit.
+ * The X^32 term is "implied"; the LSB is the X^31 term, etc. The X^0 term (usually shown
+ * as "+1") results in the MSB being 1
+ *
+ * Note that the usual hardware shift register implementation, which is what we're using
+ * (we're merely optimizing it by doing eight-bit chunks at a time) shifts bits into the
+ * lowest-order term. In our implementation, that means shifting towards the right. Why
+ * do we do it this way? Because the calculated CRC must be transmitted in order from
+ * highest-order term to lowest-order term. UARTs transmit characters in order from LSB
+ * to MSB. By storing the CRC this way we hand it to the UART in the order low-byte to
+ * high-byte; the UART sends each low-bit to hight-bit; and the result is transmission bit
+ * by bit from highest- to lowest-order term without requiring any bit shuffling on our
+ * part. Reception works similarly
+ *
+ * The feedback terms table consists of 256, 32-bit entries. Notes
+ *
+ * - The table can be generated at runtime if desired; code to do so is shown later. It
+ * might not be obvious, but the feedback terms simply represent the results of eight
+ * shift/xor operations for all combinations of data and CRC register values
+ *
+ * - The values must be right-shifted by eight bits by the updcrc logic; the shift must
+ * be u_(bring in zeroes). On some hardware you could probably optimize the shift in
+ * assembler by using byte-swap instructions polynomial $edb88320
+ ************************************************************************************************/
+
+/************************************************************************************************
+ * Included Files
+ ************************************************************************************************/
+
+#include <sys/types.h>
+#include <stdint.h>
+#include <crc32.h>
+
+/************************************************************************************************
+ * Private Data
+ ************************************************************************************************/
+
+static const uint32_t crc32_tab[] =
+{
+ 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3,
+ 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91,
+ 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
+ 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5,
+ 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
+ 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
+ 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f,
+ 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,
+ 0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
+ 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
+ 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457,
+ 0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
+ 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb,
+ 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9,
+ 0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
+ 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad,
+ 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683,
+ 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
+ 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7,
+ 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
+ 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
+ 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79,
+ 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f,
+ 0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
+ 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
+ 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21,
+ 0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
+ 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45,
+ 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db,
+ 0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
+ 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf,
+ 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
+};
+
+/************************************************************************************************
+ * Public Functions
+ ************************************************************************************************/
+/************************************************************************************************
+ * Name: crc32part
+ *
+ * Description:
+ * Continue CRC calculation on a part of the buffer.
+ *
+ ************************************************************************************************/
+
+uint32_t crc32part(const uint8_t *src, size_t len, uint32_t crc32val)
+{
+ size_t i;
+
+ for (i = 0; i < len; i++)
+ {
+ crc32val = crc32_tab[(crc32val ^ src[i]) & 0xff] ^ (crc32val >> 8);
+ }
+ return crc32val;
+}
+
+/************************************************************************************************
+ * Name: crc32
+ *
+ * Description:
+ * Return a 32-bit CRC of the contents of the 'src' buffer, length 'len'
+ *
+ ************************************************************************************************/
+
+uint32_t crc32(const uint8_t *src, size_t len)
+{
+ return crc32part(src, len, 0);
+}
diff --git a/system/zmodem/host/crc32.h b/system/zmodem/host/crc32.h
new file mode 100644
index 000000000..b73e62e6c
--- /dev/null
+++ b/system/zmodem/host/crc32.h
@@ -0,0 +1,83 @@
+/****************************************************************************
+ * apps/system/zmodem/host/crc16.h
+ *
+ * Copyright (C) 2013 Gregory Nutt. All rights reserved.
+ * Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ * used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+#ifndef __APPS_SYSTEM_ZMODEM_HOST_CRC32_H
+#define __APPS_SYSTEM_ZMODEM_HOST_CRC32_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <sys/types.h>
+#include <stdint.h>
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+#ifdef __cplusplus
+#define EXTERN extern "C"
+extern "C"
+{
+#else
+#define EXTERN extern
+#endif
+
+/****************************************************************************
+ * Name: crc32part
+ *
+ * Description:
+ * Continue CRC calculation on a part of the buffer.
+ *
+ ****************************************************************************/
+
+uint32_t crc32part(const uint8_t *src, size_t len, uint32_t crc32val);
+
+/****************************************************************************
+ * Name: crc32
+ *
+ * Description:
+ * Return a 32-bit CRC of the contents of the 'src' buffer, length 'len'
+ *
+ ****************************************************************************/
+
+uint32_t crc32(const uint8_t *src, size_t len);
+
+#undef EXTERN
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __APPS_SYSTEM_ZMODEM_HOST_CRC32_H */
diff --git a/system/zmodem/host/debug.h b/system/zmodem/host/debug.h
new file mode 100644
index 000000000..de9194f79
--- /dev/null
+++ b/system/zmodem/host/debug.h
@@ -0,0 +1,69 @@
+/****************************************************************************
+ * apps/system/zmodem/host/debug.h
+ *
+ * Copyright (C) 2007-2011, 2013 Gregory Nutt. All rights reserved.
+ * Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ * used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+#ifndef __APPS_SYSTEM_ZMODEM_HOST_DEBUG_H
+#define __APPS_SYSTEM_ZMODEM_HOST_DEBUG_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#ifdef CONFIG_HAVE_FUNCTIONNAME
+# define EXTRA_FMT "%s: "
+# define EXTRA_ARG ,__FUNCTION__
+#else
+# define EXTRA_FMT
+# define EXTRA_ARG
+#endif
+
+/****************************************************************************
+ * Public Type Declarations
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+#endif /* __APPS_SYSTEM_ZMODEM_HOST_DEBUG_H */
diff --git a/system/zmodem/host/nuttx/ascii.h b/system/zmodem/host/nuttx/ascii.h
new file mode 100644
index 000000000..19bde9242
--- /dev/null
+++ b/system/zmodem/host/nuttx/ascii.h
@@ -0,0 +1,202 @@
+/****************************************************************************
+ * apps/system/zmodem/host/ascii.h
+ * ASCII Control Codes
+ *
+ * Copyright (C) 2013 Gregory Nutt. All rights reserved.
+ * Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ * used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+#ifndef __APPS_SYSTEM_ZMODEM_HOST_NUTTX_ASCII_H
+#define __APPS_SYSTEM_ZMODEM_HOST_NUTTX_ASCII_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+/****************************************************************************
+ * Pre-Processor Definitions
+ ****************************************************************************/
+/* All 7-bit ASCII codes */
+
+#define ASCII_NUL 0x00 /* Null character (^@) */
+#define ASCII_SOH 0x01 /* Start of header (^A) */
+#define ASCII_STX 0x02 /* Start of tex (^B) */
+#define ASCII_ETX 0x03 /* End of text (^C) */
+#define ASCII_EOT 0x04 /* End of transmission (^D) */
+#define ASCII_ENQ 0x05 /* Enquiry (^E) */
+#define ASCII_ACK 0x06 /* Acknowledge (^F) */
+#define ASCII_BEL 0x07 /* Bell (^G) */
+#define ASCII_BS 0x08 /* Backspace (^H) */
+#define ASCII_TAB 0x09 /* Horizontal tab (^I) */
+#define ASCII_LF 0x0a /* Line Feed (^J) */
+#define ASCII_VT 0x0b /* Vertical tab(^K) */
+#define ASCII_FF 0x0c /* Form Feed (^L) */
+#define ASCII_CR 0x0d /* Carriage Return (^M) */
+#define ASCII_SO 0x0e /* Shift Out (^N) */
+#define ASCII_SI 0x0f /* Shift In (^O) */
+
+#define ASCII_DLE 0x10 /* Data link escape (^P) */
+#define ASCII_DC1 0x11 /* Device control 1, XON (^Q) */
+#define ASCII_XON ASCII_DC1
+#define ASCII_DC2 0x12 /* Device control 2, block-mode flow control (^R) */
+#define ASCII_DC3 0x13 /* Device control 3, XOFF (^S) */
+#define ASCII_XOFF ASCII_DC3
+#define ASCII_DC4 0x14 /* Device control 4 (^T) */
+#define ASCII_NAK 0x15 /* Negative acknowledge (^U) */
+#define ASCII_SYN 0x16 /* Synchronous idle (^V) */
+#define ASCII_ETB 0x17 /* End transmission block(^W) */
+#define ASCII_CAN 0x18 /* Cancel line(^X) */
+#define ASCII_EM 0x19 /* End of medium(^Y) */
+#define ASCII_SUB 0x1a /* Substitute (^Z) */
+#define ASCII_ESC 0x1b /* Escape (^[) */
+#define ASCII_FS 0x1c /* File separator (^\) */
+#define ASCII_GS 0x1d /* Group separator (^]) */
+#define ASCII_RS 0x1e /* Record separator, block-mode terminator (^^) */
+#define ASCII_US 0x1f /* Unit separator (^_) */
+
+#define ASCII_SPACE 0x20 /* Space ( ) */
+#define ASCII_EXCLAM 0x21 /* Exclamation mark (!) */
+#define ASCII_QUOTE 0x22 /* Quotation mark (") */
+#define ASCII_NUMBER 0x23 /* Number sign (#) */
+#define ASCII_HASH 0x23 /* Hash (#) */
+#define ASCII_DOLLAR 0x24 /* Dollar sign ($) */
+#define ASCII_PERCENT 0x25 /* Percent sign (%) */
+#define ASCII_AMPERSAND 0x26 /* Ampersand (&) */
+#define ASCII_RSQUOTE 0x27 /* Closing single quote (') */
+#define ASCII_APOSTROPHE 0x27 /* Apostrophe (') */
+#define ASCII_LPAREN 0x28 /* Opening parenthesis (() */
+#define ASCII_RPAREN 0x29 /* Closing parenthesis ()) */
+#define ASCII_ASTERISK 0x2a /* Asterisk (*) */
+#define ASCII_PLUS 0x2b /* Plus sign (+) */
+#define ASCII_COMMA 0x2c /* Comma (,) */
+#define ASCII_HYPHEN 0x2d /* Hyphen (-) */
+#define ASCII_DASH 0x2d /* Dash (-) */
+#define ASCII_MINUS 0x2d /* Minus sign (-) */
+#define ASCII_PERIOD 0x2e /* Period (.) */
+#define ASCII_SLASH 0x2f /* Forward Slash (/) */
+#define ASCII_DIVIDE 0x2f /* Divide (/) */
+
+#define ASCII_0 0x30 /* Numbers */
+#define ASCII_1 0x31 /* " " */
+#define ASCII_2 0x32 /* " " */
+#define ASCII_3 0x33 /* " " */
+#define ASCII_4 0x34 /* " " */
+#define ASCII_5 0x35 /* " " */
+#define ASCII_6 0x36 /* " " */
+#define ASCII_7 0x37 /* " " */
+#define ASCII_8 0x38 /* " " */
+#define ASCII_9 0x39 /* " " */
+#define ASCII_COLON 0x3a /* Colon (:) */
+#define ASCII_SEMICOLON 0x3b /* Semicolon (;) */
+#define ASCII_LT 0x3c /* Less than (<) */
+#define ASCII_EQUAL 0x3d /* Equal (=) */
+#define ASCII_GT 0x3e /* Greater than (>) */
+#define ASCII_QUESTION 0x3f /* Question mark (?) */
+
+#define ASCII_AT 0x40 /* At sign (@) */
+#define ASCII_A 0x41 /* Upper case letters */
+#define ASCII_B 0x42 /* " " " " " " */
+#define ASCII_C 0x43 /* " " " " " " */
+#define ASCII_D 0x44 /* " " " " " " */
+#define ASCII_E 0x45 /* " " " " " " */
+#define ASCII_F 0x46 /* " " " " " " */
+#define ASCII_G 0x47 /* " " " " " " */
+#define ASCII_H 0x48 /* " " " " " " */
+#define ASCII_I 0x49 /* " " " " " " */
+#define ASCII_J 0x4a /* " " " " " " */
+#define ASCII_K 0x4b /* " " " " " " */
+#define ASCII_L 0x4c /* " " " " " " */
+#define ASCII_M 0x4d /* " " " " " " */
+#define ASCII_N 0x4e /* " " " " " " */
+#define ASCII_O 0x4f /* " " " " " " */
+
+#define ASCII_P 0x50 /* " " " " " " */
+#define ASCII_Q 0x51 /* " " " " " " */
+#define ASCII_R 0x52 /* " " " " " " */
+#define ASCII_S 0x53 /* " " " " " " */
+#define ASCII_T 0x54 /* " " " " " " */
+#define ASCII_U 0x55 /* " " " " " " */
+#define ASCII_V 0x56 /* " " " " " " */
+#define ASCII_W 0x57 /* " " " " " " */
+#define ASCII_X 0x58 /* " " " " " " */
+#define ASCII_Y 0x59 /* " " " " " " */
+#define ASCII_Z 0x5a /* " " " " " " */
+#define ASCII_LBRACKET 0x5b /* Left bracket ([) */
+#define ASCII_BACKSLASH 0x5c /* Back slash (\) */
+#define ASCII_RBRACKET 0x5d /* Right bracket (]) */
+#define ASCII_CARET 0x5e /* Caret (^) */
+#define ASCII_CIRCUMFLEX 0x5e /* Circumflex (^) */
+#define ASCII_UNDERSCORE 0x5f /* Underscore (_) */
+
+#define ASCII_RSQUOT 0x60 /* Closing single quote */
+#define ASCII_a 0x61 /* Lower case letters */
+#define ASCII_b 0x62 /* " " " " " " */
+#define ASCII_c 0x63 /* " " " " " " */
+#define ASCII_d 0x64 /* " " " " " " */
+#define ASCII_e 0x65 /* " " " " " " */
+#define ASCII_f 0x66 /* " " " " " " */
+#define ASCII_g 0x67 /* " " " " " " */
+#define ASCII_h 0x68 /* " " " " " " */
+#define ASCII_i 0x69 /* " " " " " " */
+#define ASCII_j 0x6a /* " " " " " " */
+#define ASCII_k 0x6b /* " " " " " " */
+#define ASCII_l 0x6c /* " " " " " " */
+#define ASCII_m 0x6d /* " " " " " " */
+#define ASCII_n 0x6e /* " " " " " " */
+#define ASCII_o 0x6f /* " " " " " " */
+
+#define ASCII_p 0x70 /* " " " " " " */
+#define ASCII_q 0x71 /* " " " " " " */
+#define ASCII_r 0x72 /* " " " " " " */
+#define ASCII_s 0x73 /* " " " " " " */
+#define ASCII_t 0x74 /* " " " " " " */
+#define ASCII_u 0x75 /* " " " " " " */
+#define ASCII_v 0x76 /* " " " " " " */
+#define ASCII_w 0x77 /* " " " " " " */
+#define ASCII_x 0x78 /* " " " " " " */
+#define ASCII_y 0x79 /* " " " " " " */
+#define ASCII_z 0x7a /* " " " " " " */
+#define ASCII_LBRACE 0x7b /* Left brace ({) */
+#define ASCII_VERTBAR 0x7c /* Vertical bar (|) */
+#define ASCII_PIPE 0x7c /* Pipe (|) */
+#define ASCII_RBRACE 0x7d /* Right brace (}) */
+#define ASCII_TILDE 0x7e /* Tilde (~) */
+#define ASCII_DEL 0x7f /* Delete (rubout) */
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+#endif /* __APPS_SYSTEM_ZMODEM_HOST_NUTTX_ASCII_H */
diff --git a/system/zmodem/host/nuttx/compiler.h b/system/zmodem/host/nuttx/compiler.h
new file mode 100644
index 000000000..ed80571e2
--- /dev/null
+++ b/system/zmodem/host/nuttx/compiler.h
@@ -0,0 +1,167 @@
+/****************************************************************************
+ * include/nuttx/compiler.h
+ *
+ * Copyright (C) 2013 Gregory Nutt. All rights reserved.
+ * Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ * used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+#ifndef __APPS_SYSTEM_ZMODEM_HOST_NUTTX_COMPILER_H
+#define __APPS_SYSTEM_ZMODEM_HOST_NUTTX_COMPILER_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/* GCC-specific definitions *************************************************/
+
+#ifdef __GNUC__
+
+/* Pre-processor */
+
+# define CONFIG_CPP_HAVE_VARARGS 1 /* Supports variable argument macros */
+# define CONFIG_CPP_HAVE_WARNING 1 /* Supports #warning */
+
+/* Intriniscs */
+
+# define CONFIG_HAVE_FUNCTIONNAME 1 /* Has __FUNCTION__ */
+# define CONFIG_HAVE_FILENAME 1 /* Has __FILE__ */
+
+/* Attributes
+ *
+ * GCC supports weak symbols which can be used to reduce code size because
+ * unnecessary "weak" functions can be excluded from the link.
+ */
+
+# ifndef __CYGWIN__
+# define CONFIG_HAVE_WEAKFUNCTIONS 1
+# define weak_alias(name, aliasname) \
+ extern __typeof (name) aliasname __attribute__ ((weak, alias (#name)));
+# define weak_function __attribute__ ((weak))
+# define weak_const_function __attribute__ ((weak, __const__))
+# else
+# undef CONFIG_HAVE_WEAKFUNCTIONS
+# define weak_alias(name, aliasname)
+# define weak_function
+# define weak_const_function
+# endif
+
+/* The noreturn attribute informs GCC that the function will not return. */
+
+# define noreturn_function __attribute__ ((noreturn))
+
+/* The farcall_function attribute informs GCC that is should use long calls
+ * (even though -mlong-calls does not appear in the compilation options)
+ */
+
+# define farcall_function __attribute__ ((long_call))
+
+/* The packed attribute informs GCC that the stucture elements are packed,
+ * ignoring other alignment rules.
+ */
+
+# define packed_struct __attribute__ ((packed))
+
+/* GCC does not support the reentrant attribute */
+
+# define reentrant_function
+
+/* The naked attribute informs GCC that the programmer will take care of
+ * the function prolog and epilog.
+ */
+
+# define naked_function __attribute__ ((naked,no_instrument_function))
+
+/* The inline_function attribute informs GCC that the function should always
+ * be inlined, regardless of the level of optimization. The noinline_function
+ * indicates that the function should never be inlined.
+ */
+
+# define inline_function __attribute__ ((always_inline))
+# define noinline_function __attribute__ ((noinline))
+
+/* GCC has does not use storage classes to qualify addressing */
+
+# define FAR
+# define NEAR
+# define DSEG
+# define CODE
+
+/* Unknown compiler *********************************************************/
+
+#else
+
+# undef CONFIG_CPP_HAVE_VARARGS
+# undef CONFIG_CPP_HAVE_WARNING
+# undef CONFIG_HAVE_FUNCTIONNAME
+# undef CONFIG_HAVE_FILENAME
+# undef CONFIG_HAVE_WEAKFUNCTIONS
+# define weak_alias(name, aliasname)
+# define weak_function
+# define weak_const_function
+# define noreturn_function
+# define farcall_function
+# define packed_struct
+# define reentrant_function
+# define naked_function
+# define inline_function
+# define noinline_function
+
+# define FAR
+# define NEAR
+# define DSEG
+# define CODE
+
+# undef CONFIG_SMALL_MEMORY
+# undef CONFIG_LONG_IS_NOT_INT
+# undef CONFIG_PTR_IS_NOT_INT
+# undef CONFIG_HAVE_INLINE
+# define inline 1
+# undef CONFIG_HAVE_LONG_LONG
+# define CONFIG_HAVE_FLOAT 1
+# undef CONFIG_HAVE_DOUBLE
+# undef CONFIG_HAVE_LONG_DOUBLE
+# undef CONFIG_CAN_PASS_STRUCTS
+
+#endif
+
+/****************************************************************************
+ * Global Function Prototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Global Function Prototypes
+ ****************************************************************************/
+
+#endif /* __APPS_SYSTEM_ZMODEM_HOST_NUTTX_COMPILER_H */
diff --git a/system/zmodem/host/nuttx/config.h b/system/zmodem/host/nuttx/config.h
new file mode 100644
index 000000000..002a60d55
--- /dev/null
+++ b/system/zmodem/host/nuttx/config.h
@@ -0,0 +1,91 @@
+/****************************************************************************
+ * include/nuttx/compiler.h
+ *
+ * Copyright (C) 2013 Gregory Nutt. All rights reserved.
+ * Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ * used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+#ifndef __APPS_SYSTEM_ZMODEM_HOST_NUTTX_CONFIG_H
+#define __APPS_SYSTEM_ZMODEM_HOST_NUTTX_CONFIG_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <stdlib.h>
+#include <string.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+/* Environment stuff */
+
+#define OK 0
+#define ERROR -1
+#define FAR
+#define DEBUGASSERT assert
+
+/* Configuration */
+
+#define CONFIG_SYSTEM_ZMODEM_DEVNAME "/dev/ttyS0"
+#define CONFIG_SYSTEM_ZMODEM_RCVBUFSIZE 512
+#define CONFIG_SYSTEM_ZMODEM_PKTBUFSIZE 1024
+#define CONFIG_SYSTEM_ZMODEM_SNDBUFSIZE 512
+#define CONFIG_SYSTEM_ZMODEM_MOUNTPOINT "/tmp"
+#undef CONFIG_SYSTEM_ZMODEM_RCVSAMPLE
+#undef CONFIG_SYSTEM_ZMODEM_SENDATTN
+#define CONFIG_SYSTEM_ZMODEM_RESPTIME 10
+#define CONFIG_SYSTEM_ZMODEM_CONNTIME 30
+#define CONFIG_SYSTEM_ZMODEM_SERIALNO 1
+#define CONFIG_SYSTEM_ZMODEM_MAXERRORS 20
+#define CONFIG_SYSTEM_ZMODEM_WRITESIZE 0
+#define CONFIG_SYSTEM_ZMODEM_MOUNTPOINT "/tmp"
+
+/* Cannot control pre-emption from Linux (don't need to) */
+
+#define sched_lock()
+#define sched_unlock()
+
+/****************************************************************************
+ * Inline Functions
+ ****************************************************************************/
+
+static inline void *zalloc(unsigned long size)
+{
+ void *ret = malloc(size);
+ if (ret)
+ {
+ memset(ret, 0, size);
+ }
+ return ret;
+}
+
+#endif /* __APPS_SYSTEM_ZMODEM_HOST_NUTTX_CONFIG_H */
diff --git a/system/zmodem/zm.h b/system/zmodem/zm.h
index d025e94ef..ec653d796 100644
--- a/system/zmodem/zm.h
+++ b/system/zmodem/zm.h
@@ -50,6 +50,7 @@
#include <stdint.h>
#include <debug.h>
+#include <nuttx/compiler.h>
#include <nuttx/ascii.h>
#include <apps/zmodem.h>
diff --git a/system/zmodem/zm_send.c b/system/zmodem/zm_send.c
index f93a90304..df8e8414f 100644
--- a/system/zmodem/zm_send.c
+++ b/system/zmodem/zm_send.c
@@ -1065,8 +1065,8 @@ static int zms_sendpacket(FAR struct zm_state_s *pzm)
/* And send the packet */
- dbg("Sending %d bytes. New offset: %ld\n",
- pktsize, (unsigned long)pzms->offset);
+ zmdbg("Sending %d bytes. New offset: %ld\n",
+ pktsize, (unsigned long)pzms->offset);
nwritten = zm_remwrite(pzm->remfd, pzm->scratch, pktsize);
if (nwritten < 0)