FW410

From FreeBoB

The very first BridgeCo product. Therefore it is no supprise it has some differences to the later products.

  • The AV/C model differs heavily from a BeBoB firmware.
    • 3 oPCR, 3 iPCR
      • oPCR[0]: I2S, 2 channels
      • oPCR[1]: I2S, 2 channels
      • oPCR[2]: MIDI, 2 channels, but only one channel is used for midi
      • iPCR[0]: I10S, 10 channels (Could also be a I8S, docu is not clear -> check the log file)
      • iPCR[1]: I2S, AC3
      • iPCR[2]: MIDI, 2 channels, but only one channel is used for midi

FW410 Startup ASYN only (Windows Driver) (http://freebob.sourceforge.net/download/fw410-startup-only-asyn-traffic.txt). Note this recording was done with a broken firespy. So most errors are not really errors.

Simple config rom read looks like this (http://freebob.sourceforge.net/download/fw410-configrom_access.png). Not again the same broken firespy has produced this recording. I'll do another with another firespy.

All 100ms there some status from the device on channel 31 to be seen.

[edit]

PCR connection order

The order in which the windows driver connects to the pcr is 

 oPCR[0] -> iso channel 2
 oPCR[1] -> iso channel 4
 iPCR[0] -> iso channel 1
 iPCR[2] -> iso channel 3
[edit]

Bandwith allocation (Windows Driver)

The Windows driver does following bandwith allocation: 

 0x1333 - 0x11eb = 0x148
 0x11eb - 0x1163 = 0x88
 0x1163 - 0x110b = 0x58
 0x110b - 0x10ff = 0xc
 0x10ff - 0x10f3 = 0xc
 0x10f3 - 0x10ab = 0x48

According the formula in 7.7 IEC61883-1 Ed.2 the smalles possible allocation is 1 * 32 + (0 + 3) * 4 = 44 bandwith allocation units (BWU). 

 BWU = overhead_ID * C + (payload + K) * DR

where 

 overhead_ID = 0b0001 for 32 BWU
 C = 32  
 K = 3
 DR = data rate coefficient, 16 for S100, 8 for S200, 4 for S400

It is not clear to me if those values make sense at all. They just look plain wrong.

[edit]

test_fw410

Simple test program which tries to do just cmp. I'm not able to get any useful sequence to establish all connections (leaving the midi away) 

 wagi@newton:~/src/libfreebob/tests$ ./test-fw410 1
 local node id 0
 remote node id 1
 libiec61883 warning: iec61883_cmp_calc_bandwidth: Failed to get the oMPR plug for node 0.
 libiec61883 warning: Established connection on channel 0.
 You may need to manually set the channel on the transmitting node.
  0 ->  1 iPCR[ 0]: bw = 2608, ch =  0
 libiec61883 warning: iec61883_cmp_calc_bandwidth: Failed to get the oMPR plug for node 0.
 libiec61883 warning: Failed to allocate bandwidth.
  0 ->  1 iPCR[ 1]: bw = 2608, ch = -1
 libiec61883 warning: Established connection on channel 1.
 You may need to manually set the channel on the receiving node.
  1 ->  0 oPCR[ 0]: bw = 1036, ch =  1
 libiec61883 warning: Established connection on channel 2.
 You may need to manually set the channel on the receiving node.
  1 ->  0 oPCR[ 1]: bw = 1036, ch =  2

PCR[2] cannot be used for cmp 

 wagi@newton:~/src/libfreebob/tests$ ./test-fw410 1
 local node id 0
 remote node id 1
 libiec61883 warning: Established connection on channel 0.
 You may need to manually set the channel on the receiving node.
  1 ->  0 oPCR[ 0]: bw = 1036, ch =  0
 libiec61883 warning: Established connection on channel 1.
 You may need to manually set the channel on the receiving node.
  1 ->  0 oPCR[ 1]: bw = 1036, ch =  1
 libiec61883 error: Failed to get plug 2 for output node
  1 ->  0 oPCR[ 2]: bw =    0, ch = -1
 libiec61883 warning: iec61883_cmp_calc_bandwidth: Failed to get the oMPR plug for node 0.
 libiec61883 warning: Established connection on channel 2.
 You may need to manually set the channel on the transmitting node.
  0 ->  1 iPCR[ 0]: bw = 1036, ch =  2
 libiec61883 warning: iec61883_cmp_calc_bandwidth: Failed to get the oMPR plug for node 0.
 libiec61883 warning: Established connection on channel 3.
 You may need to manually set the channel on the transmitting node.
  0 ->  1 iPCR[ 1]: bw = 1036, ch =  3
 libiec61883 warning: iec61883_cmp_calc_bandwidth: Failed to get the oMPR plug for node 0.
 libiec61883 warning: Failed to calculate bandwidth.
  0 ->  1 iPCR[ 2]: bw =   -1, ch = -1

Without the bandwith calculation (iec61883_cmp_calc_bandwith) and using the max value seen with the windows driver (0x148) for all plugs I see following: 

 wagi@newton:~/src/libfreebob/tests$ ./test-fw410 2
 local node id 1
 remote node id 2
 libiec61883 warning: Established connection on channel 0.
 You may need to manually set the channel on the receiving node.
  2 ->  1 oPCR[ 0]: bw = 1036, ch =  0
 libiec61883 warning: Established connection on channel 1.
 You may need to manually set the channel on the receiving node.
  2 ->  1 oPCR[ 1]: bw = 1036, ch =  1
 libiec61883 warning: Established connection on channel 2.
 You may need to manually set the channel on the transmitting node.
  1 ->  2 iPCR[ 0]: bw = 1036, ch =  2
 libiec61883 warning: Established connection on channel 3.
 You may need to manually set the channel on the transmitting node.
  1 ->  2 iPCR[ 1]: bw = 1036, ch =  3

This looks much better, we get a channel, but I don't see any iso packets for channel 0 and channel 1 on the bus.

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