The same technique should work well with other (bigger) ball sizes too, however there are rarely issues when handling bigger packages and less care is usually needed there.
The technique uses premade solder balls, not solder paste.
Equipment:
| CC=avr-gcc | |
| OBJCOPY=avr-objcopy | |
| OBJS=main.o | |
| PROJECT=eprog | |
| CFLAGS=-Os -mmcu=atmega328p | |
| LDFLAGS=-Os -mmcu=atmega328p | |
| .PHONY: all burn clean | |
| all: $(PROJECT).flash.hex |
| [Unit] | |
| Description=ACARSdec service | |
| After=multi-user.target | |
| StartLimitIntervalSec=0 | |
| [Service] | |
| Type=idle | |
| Restart=always | |
| RestartSec=1 | |
| ExecStart=/opt/acarsdec/acarsdec -g 320 -N 192.168.1.46 -i DJ-FRB -r 0 131.525 131.725 131.825 |
| diff -Naur backports-4.4.2-1/defconfigs/ath9k-debug backports-4.4.2-1-modwifi/defconfigs/ath9k-debug | |
| --- backports-4.4.2-1/defconfigs/ath9k-debug 2016-02-18 22:41:34.000000000 +0100 | |
| +++ backports-4.4.2-1-modwifi/defconfigs/ath9k-debug 2016-04-03 13:28:53.000000000 +0200 | |
| @@ -17,3 +17,4 @@ | |
| CPTCFG_ATH9K_HTC=m | |
| CPTCFG_ATH_DEBUG=y | |
| CPTCFG_ATH9K_DEBUGFS=y | |
| +CPTCFG_ATH9K_HTC_DEBUGFS=y | |
| diff -Naur backports-4.4.2-1/drivers/net/wireless/ath/ath9k/htc_drv_debug.c backports-4.4.2-1-modwifi/drivers/net/wireless/ath/ath9k/htc_drv_debug.c | |
| --- backports-4.4.2-1/drivers/net/wireless/ath/ath9k/htc_drv_debug.c 2016-02-18 22:41:35.000000000 +0100 |
| <html> | |
| <body> | |
| <script> | |
| document.cookie = "FANCYPANTS"; | |
| console.log("parent origin: " + self.location.origin); | |
| console.log("cookie: " + document.cookie); | |
| var html = '<bo'+'dy><scr'+'ipt>console.log("iframe origin: " + self.location.origin);console.log("cookie: " + document.cookie);</scr'+'ipt></bo'+'dy>'; | |
| var iframe = document.createElement('iframe'); | |
| iframe.src = 'data:text/html;charset=utf-8,' + encodeURI(html); | |
| document.body.appendChild(iframe); |
| // | |
| // This script generates MMIO segments for STMicro Cortex-M3 cores | |
| // | |
| #include <idc.idc> | |
| static DefineSegment(sa, sz, name) { | |
| SegCreate(sa, sa + sz, 0x1, 1, 1, 2); | |
| SegRename(sa, name); | |
| SegClass (sa, "MMIO"); |
Heya all! I was asked to write up a document on how to build your own autonomous airband ACARS receiver and join the club. Before you start shelling out moneys, though, I recommend checking whether there is any plane activity in your area: go visit your favourite plane spotting site (e.g. flightradar24) and observe air traffic for awhile; if there's nothing flying above for the whole day, there is no big point in setting up.
My big thanks extends to Thierry and Hugo who helped to beta test this document. :-)
Without any further delay, let's dive.
To build a working receiver, you will need:
| def hexdump(data): | |
| """Pretty print a hex dump of data, similar to xxd""" | |
| lines = [] | |
| offset = 0 | |
| while offset < len(data): | |
| piece = data[offset:offset + 16] | |
| bytes = ''.join([('%02x ' % ord(x)) for x in piece]) | |
| chars = ''.join([(x if 0x20 < ord(x) < 0x7f else '.') for x in piece]) | |
| lines.append('%04x %-24s %-24s %-16s' % (offset, bytes[:24], bytes[24:], chars)) | |
| offset += len(piece) |