Avalon2: Difference between revisions

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=== [http://downloads.canaan-creative.com/hardware/A3255/prototype/FIRMWARE/2013-11-08/ 2013-11-08] ===
=== [http://downloads.canaan-creative.com/hardware/A3255/prototype/FIRMWARE/2013-11-08/ 2013-11-08] ===
* change `core_count to 64 to compatible with ealier cgminer  
* Change `core_count to 64 to compatible with ealier cgminer  
* software should follow equation below when handle A3255 based miner
* Software should follow equation below when handle A3255 based miner
  nonce_send_to_pool = nonce_receive_from_miner-0xc0
  nonce_send_to_pool = nonce_receive_from_miner-0xc0



Revision as of 11:21, 10 November 2013

Avalon2 is the second machine of Avalon project. using the 55nm ASIC chips

Prototype

Firmware

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

2013-11-08

  • 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

2013-11-05

  • Upload the 703n firmware
  • Upload the FPGA controller firmware
  • Support 8, 16, 24 miners, 8 and 16 have tested
  • 32 miners not working
  • Support 6 ~ 10 chip in each miner, 6 and 10 have tested

2013-10-07

  • Only support 16 miners, each miner have 6 A3255

Links