added built-in AVR/optiboot programmer

avrflash

@@ -0,0 +1,110 @@
+#! /bin/bash
+#
+# Flash an AVR with optiboot using the esp-link built-in programmer
+# Basically we first reset the AVR and get in sync, and then send the hex file
+#
+# ----------------------------------------------------------------------------
+# "THE BEER-WARE LICENSE" (Revision 42):
+# Thorsten von Eicken wrote this file. As long as you retain 
+# this notice you can do whatever you want with this stuff. If we meet some day, 
+# and you think this stuff is worth it, you can buy me a beer in return. 
+# ----------------------------------------------------------------------------
+
+show_help() {
+  cat <<EOT
+Usage: ${0##*/} [-options...] hostname sketch.hex
+Flash the AVR running optiboot attached to esp-link with the sketch.
+  -v                    Be verbose
+  -h                    show this help
+
+Example: ${0##*/} -v esp-link mysketch.hex
+         ${0##*/} 192.168.4.1 mysketch.hex
+EOT
+}
+
+if ! which curl >/dev/null; then
+  echo "ERROR: Cannot find curl: it is required for this script." >&2
+  exit 1
+fi
+
+start=`date +%s`
+
+# ===== Parse arguments
+
+verbose=
+
+while getopts "hvx:" opt; do
+  case "$opt" in
+    h) show_help; exit 0 ;;
+    v) verbose=1 ;;
+    x) foo="$OPTARG" ;;
+    '?') show_help >&2; exit 1 ;;
+  esac
+done
+
+# Shift off the options and optional --.
+shift "$((OPTIND-1))"
+
+# Get the fixed arguments
+if [[ $# != 2 ]]; then
+  show_help >&2
+  exit 1
+fi
+hostname=$1
+hex=$2
+
+re='[-A-Za-z0-9.]+'
+if [[ ! "$hostname" =~ $re ]]; then
+  echo "ERROR: hostname ${hostname} is not a valid hostname or ip address" >&2
+  exit 1
+fi
+
+if [[ ! -r "$hex" ]]; then
+  echo "ERROR: cannot read hex file ($hex)" >&2
+  exit 1
+fi
+
+# ===== Get AVR in sync
+
+[[ -n "$verbose" ]] && echo "Resetting AVR with http://$hostname/pgm/sync" >&2
+v=; [[ -n "$verbose" ]] && v=-v
+sync=`curl -m 10 $v -s -w '%{http_code}' -XPOST "http://$hostname/pgm/sync"`
+if [[ $? != 0 || "$sync" != 204 ]]; then
+  echo "Error resetting AVR" >&2
+  exit 1
+fi
+
+while true; do
+  sync=`curl -m 10 $v -s "http://$hostname/pgm/sync"`
+  if [[ $? != 0 ]]; then
+    echo "Error checking sync" >&2
+    exit 1
+  fi
+  case "$sync" in
+  SYNC*)
+    echo "AVR in $sync"  >&2
+    break;;
+  "NOT READY"*)
+    [[ -n "$verbose" ]] && echo "  Waiting for sync..." >&2
+    ;;
+  *)
+    echo "Error checking sync: $sync" >&2
+    exit 1
+    ;;
+  esac
+  sleep 0.1
+done
+
+# ===== Send HEX file
+
+[[ -n "$verbose" ]] && echo "Sending HEX file for programming" >&2
+sync=`curl -m 10 $v -s -g -d "@$hex" "http://$hostname/pgm/upload"`
+echo $sync
+if [[ $? != 0 || ! "$sync" =~ ^Success ]]; then
+  echo "Error programming AVR" >&2
+  exit 1
+fi
+
+sec=$(( `date +%s` - $start ))
+echo "Success, took $sec seconds" >&2
+exit 0

esp-link/cgi.c

@@ -17,7 +17,8 @@ Some random cgi routines.
 #include <esp8266.h>
 #include "cgi.h"
 
-void noCacheHeaders(HttpdConnData *connData, int code) {
+void ICACHE_FLASH_ATTR
+noCacheHeaders(HttpdConnData *connData, int code) {
   httpdStartResponse(connData, code);
   httpdHeader(connData, "Cache-Control", "no-cache, no-store, must-revalidate");
   httpdHeader(connData, "Pragma", "no-cache");

esp-link/cgi.h

@@ -4,6 +4,7 @@
 #include <esp8266.h>
 #include "httpd.h"
 
+void noCacheHeaders(HttpdConnData *connData, int code);
 void jsonHeader(HttpdConnData *connData, int code);
 void errorResponse(HttpdConnData *connData, int code, char *message);