/* modification history: 10.Apr.2006 yyc [1.4E] add atc command : +psc +psd +pbsd flowctrl bug fix in ATC mode verify EEPROM after ezcfg write T2S IP filtering support TCP keep-alive bug fix 16.Jan.2006 yyc [1.4D] arp cache bug fix on peer mac address change 21.Sep.2005 yyc [1.4C] discard sio_rx data during idle state in t2s mode reset prism after 30sec rx idle increase prism response wait time 08.Sep.2005 yyc [1.4B] add DHCP client_id option, and modify ip_update for VDSL 25.Jul.2005 yyc [1.4A] real-time debug message on/off boot time STS LED blink pull-up RX1 pin (console) delay 10ms after at+pwp drop DHCP packet if DHCP is not configured 11.Jul.2005 yyc [1.3I] avoid sending TCP/UDP segment if IP not allocated ATC/COD dhcp arp bug fix call arp_boot_announce after DHCP IP allocation ezl_gate_ip atomic bug fix avoid call _b_ezlock() in boot code, to fix sio rx lost bug 16.Jun.2005 yyc [1.3H] remote ezConfig support comment support 20.May.2005 yyc [1.3G] enable createIBSS if target ssid presents 26.Jan.2005 yyc [1.3F] TCP SYN_RCVD bug fix 14.Jan.2005 yyc [1.3E] TCP winq_init bug fix 13.Jan.2005 yyc [1.3D] TCP zero window bug fix 06.Jan.2005 yyc [1.3C] at+prip : arp quick request modify atc +++ processing sequence to be same as ezl-200/50 29.Dec.2004 yyc [1.3B] TCP nagle timer support 14.Dec.2004 yyc [1.3A] TCP sliding window support fix DHCP led blink interval send atc +++ character 07.Dec.2004 yyc [1.2C] config wlan_env over wlan 14.Oct.2004 yyc [1.2B] set EN_XONOFF bit to one while reading eeprom 08.Sep.2004 yyc [1.2A] XON/XOFF flowcontrol support 30.Aug.2004 yyc [1.1H] increase dhcp packet size due to fuck dhcp server 26.Aug.2004 yyc [1.1G] increase TMP_BUF_SIZE due to fuck dhcp server 29.Jun.2004 yyc [1.1F] TCP window size bug fix 18.Jun.2004 yyc [1.1E] U2S flow-ctrl bug fix 15.Jun.2004 yyc [1.1D] UART parity bug fix ezcfg wlan status support 14.Jun.2004 yyc [1.1C] fit xfer_timeout/watermark algorithm to ezl-50 11.Jun.2004 yyc [1.1B] TxDE support TX CTS bug fix (brne .exit_isr_tx => brne .stop_tx) 01.Jun.2004 yyc [1.1A] avoid RST reply to RST packet T2S tcp_state bug fix RTS default low at startup activate RTS, though TCP not connected 115200bps '+++' bug fix 11.May.2004 yyc [1.0C] PM and sleep mode support 10.May.2004 yyc [1.0B] ath no-argument bug fix 18.Dec.2003 yyc initial touch */