Avalon2 prototype

From Bitcoin Wiki
Revision as of 10:14, 23 January 2014 by Xiangfu (talk | contribs)
Jump to: navigation, search

Avalon2 55nm prototype.jpeg

Documents

Firmware

For latest 703N firmware please goto here: http://downloads.canaan-creative.com/software/avalon/latest/. from 20131229. the cgminer will support both Avalon 110nm and Avalon A3255 prototype machine.

2013-12-07

  • 8, 16 miners works just fine
  • ISSUE: 32 miners with 10 chips still not working because TIMEOUT issue
  • Change `core_count to 64 to compatible with ealier cgminer
  • Software should follow equation below when handle A3255 based miner
nonce_send_to_pool = nonce_receive_from_miner-0xc0
  • Include all hardware design files under this tar ball

TIMEOUT

  • TIMEOUT的有效值范围为[0,255],FPGA controller根据TIMEOUT的配置来控制申请/计算任务的时间。当TIMEOUT值配置为1时,FPGA controller会每隔0.033s申请一次任务,也表示芯片已计算完当前HASH区间。
  • TIMEOUT配置与申请/计算任务时间间隔的公式为
 TIME_OF_MINER_FINISH_HASH_RANGE = TIMEOUT * 0.033s
 TIMEOUT = TIME_OF_MINER_FINISH_HASH_RANGE / 0.033s
  • 若FPGA controller连接的一个小模块上的计算能力为10GHs(10个芯片,每芯片1G),则FPGA controller申请任务的时间间隔为
 2^32 / 10*1000*1000*1000 = 0.4s
 0.4s/0.033s = 12 # TIMEOUT应配置为12
  • 如果使用prototype中的FPGA固件,你们的硬件设计一定要满足下面的式子:
发送全部任务的时间 一定要小于 FPGA申请任务的时间(也就是ASIC算完自己区间的时间)
((11+2+chip_num)*4*10/115200)*miner_num*1000 + DELAY_IN_MS*miner_num < (128591 / chip_num / frequency) * 33ms
解释一下:
 11+2+chip_num)*4 ==> CHIP_NUM的任务长度,单位Byte
 ((11+2+chip_num)*4*10/115200)*miner_num*1000 ==> 发送MINER_NUM个这样的任务所需要的时间,单位是ms
 DELAY_IN_MS*miner_num ==> 总的Delay时间,DELAY_IN_MS见cgminer代码:driver-avalon.c:1132
 (128591 / chip_num / frequency) * 33ms ==> TIMEOUT值,详见Wiki文档
几个测试的例子,仅供参考:
MINER_NUM:CHIP_NUM:FREQUENCY:TIMEOUT
==> 16:10:1000:12 works fine
==> 16:10:1500:8   works fine
==> 24:10:1000:12 works fine
==> 24:10:1500:8   works fine
==> 32:6:1000:21   works fine
==> 32:6:1500:12   works fine
==> 32:10:1000:12 works fine
==> 32:10:1500:8   not working

Work without LDO RT9187

  • Connect the C20 right pad to C15 or C14 left pad
  • Please keep the Vcore to between 0.95v and 1.05v, the origin design was 1v.
  • If the crystal not working, try to reduce the R28(by default it's 1K), if reduce the R28 didn't make crystal back to working. try repace the crystal with a better brand.

Avalon2 work without LDO RT9187 2.jpeg Avalon2 work without LDO RT9187 1.jpeg

55nm open design

  • form
https://github.com/formtapez/avalon
https://bitcointalk.org/index.php?topic=323175.0
Supported by official BFGMiner 3.8+
  • flyonwall
https://bitcointalk.org/index.php?topic=323175.msg3759895#msg3759895
  • Technobit Team
https://bitcointalk.org/index.php?topic=323727.0
here is the design, BOM:
http://ge.tt/2B4qW051/v/0?c
Here is CGminer patch and dd-wrt cgminer build
http://technobit.eu/index.php?controller=attachment&id_attachment=30
Windows drivers
http://technobit.eu/index.php?controller=attachment&id_attachment=9
Windows HEXminer software
http://technobit.eu/index.php?controller=attachment&id_attachment=29
Specs
16 chip board
Hash rate - about 24 Gh/s overclocked
16 bit PIC controller
2 line power suply
Voltage controled by command in the software/firmware
USB connector
molex 4 pin power connector
Review: https://bitcointalk.org/index.php?topic=355323.0
  • George Hahn
https://github.com/GeorgeHahn/Avalon
  • Dan
http://arselin.com/drillbit/2013/12/01/avalon-gen2-miners-by-drillbit-systems/
http://www.drillbitsystem.com/avalon/
  • Carlos
https://github.com/ctapang/DesignEntry/
  • Zhaodong
https://github.com/BitDragonfly/A3256-mono
  • Ardulon 2
https://code.google.com/p/ardulon-miner/source/browse/#svn%2Ftrunk