Welcome to the PHCC Wiki.

Please create an user account and then help us to make this the one-stop for information on PHCC.

 Actions

Difference between revisions of "Communication Protocols"

From PHCC

(New page: = PHCC Communication Protocols = The following communication protocols are used in the PHCC system: * RS-232 (between PHCC motherboard and the host PC). * [[DOA bus|Digital Output Type A]...)
 
(Documenting change in PHCC2host protocol (analog all axes dump) in firmware 0.1.8)
 
(4 intermediate revisions by 3 users not shown)
Line 1: Line 1:
= PHCC Communication Protocols =
+
= PHCC Communication Interfaces, Busses, and Protocols =
  
 
The following communication protocols are used in the PHCC system:
 
The following communication protocols are used in the PHCC system:
Line 6: Line 6:
 
* [[DOB bus|Digital Output Type B]] bus (using a two-wire syncronous serial interface).
 
* [[DOB bus|Digital Output Type B]] bus (using a two-wire syncronous serial interface).
 
* I<sup>2</sup>C bus.
 
* I<sup>2</sup>C bus.
 +
 +
 +
The PHCC system and the host PC have their own protocol stacked on top of the RS-232 bus.
 +
Details of this protocol can be found in the following documents:
 +
* Host to PHCC: [[Media:Host2PHCC_Protocol.xfig.pdf]]
 +
* PHCC to Host: [[Media:PHCC2HostProtocol.xfig.pdf]]
 +
** The analog all axes dump differ from specification in firmware 0.1.8. The first packet sent by the motherboard only contain the packet type (b10100000). The next packet contains the upper 2 bits from the 10 bits ADC. The following byte contains the rest of the 8 bits from the ADC. These two packet are repeated for each analog input. The ''all-bits-one-byte'' and "all-bits-zero-byte" finally close the transmission. For more information, consult line 899 from [[Media:Firmware18.asm]].

Latest revision as of 22:10, 2 June 2011

PHCC Communication Interfaces, Busses, and Protocols

The following communication protocols are used in the PHCC system:


The PHCC system and the host PC have their own protocol stacked on top of the RS-232 bus. Details of this protocol can be found in the following documents:

  • Host to PHCC: Media:Host2PHCC_Protocol.xfig.pdf
  • PHCC to Host: Media:PHCC2HostProtocol.xfig.pdf
    • The analog all axes dump differ from specification in firmware 0.1.8. The first packet sent by the motherboard only contain the packet type (b10100000). The next packet contains the upper 2 bits from the 10 bits ADC. The following byte contains the rest of the 8 bits from the ADC. These two packet are repeated for each analog input. The all-bits-one-byte and "all-bits-zero-byte" finally close the transmission. For more information, consult line 899 from Media:Firmware18.asm.