[s1mp3-dev] Around ICE(2)

[Legolas]

seventh guardian ha scritto:

>On 6/15/06, Legolas <legolas558 at email.it> wrote:
>  
>
>>No problem - anyway a ICE/JTAG guru (no, I am not) would be welcome
>>since we are proceeding with lead boots - very slow. A point of view
>>"from the inside" would help a lot (usually most of people _uses_
>>ICE/JTAG, and now we need the experience of somebody who _makes_ ICE/JTAGs)
>>
>>The possibility of a JTAGICE MK II can be trashed, but I would better
>>investigate the fact that this ICE works both for the MCU and for the
>>DSP. This should be a clue. Unfortunately I know nothing about DSP ICEs.
>>    
>>
>
>Indeed, it should be a clue. There must be a way of having both of
>them on the bus without interfering. There could be some form of
>addressing so that only one of the cores gets the data. This ICE can
>be an access point to some internal bus..
>  
>
Yes, but I think that it is well designed (only this, at least!)

>I wonder if the player spits out data when playing music with ICEEN
>active :S don't know if this is possible though (ICEEN can trigger
>some internal state change..) I'm seriously considering building one
>of those JD-ICE :)
>  
>
ICEs use to answer (send data) on demand, it is still serial. Any kind 
of output otherwise read (it is possible since ICE shares GPIO lines) 
should not be considered.

--
  Legolas

>  
>
>>--
>>  Legolas
>>
>>
>>Bluechip ha scritto:
>>
>>    
>>
>>>Again, to state publicly that you [legolas] are the man on this subject.
>>>Apologies if my mis-information confused.
>>>I have no idea where I got my dellusion from.
>>>Know that it is now corrected.
>>>
>>>;)
>>>
>>>BC
>>>
>>>
>>>
>>>      
>>>
>>>>Not to be pedantic, but "JTAG" is never mentioned and even if modern
>>>>ICEs are all JTAGs (with state machine) we think that their ICE is
>>>>something slightly different from the standard, Alistair is making some
>>>>tests in these days.
>>>>
>>>>About tests I have done with JohnDoe: see
>>>>http://www.s1mp3.org/wiki/index.php/S1ice
>>>>
>>>>--
>>>> Legolas
>>>>
>>>>
>>>>Bluechip ha scritto:
>>>>
>>>>
>>>>
>>>>        
>>>>
>>>>>>Hi!
>>>>>>
>>>>>>This is a long shot, but have you tried I2C for the ICE protocol? I
>>>>>>mean, if I was to produce a chip specifially with I2C support, I
>>>>>>wouldn't double the hardware, so I would use the same hardware for the
>>>>>>ICE. Try to read some registers and see what you get back..
>>>>>>
>>>>>>Cheers!
>>>>>>Renato
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>            
>>>>>>
>>>>>Nice thought - but we are 95% certain that there is a JTAG-ICE
>>>>>protocol as it is mentioned several times in the hardware docs and we
>>>>>have standard JTAG-ICE pins on the chip. :( ...Keep the ideas
>>>>>
>>>>>
>>>>>          
>>>>>
>>>>coming though :)
>>>>
>>>>
>>>>        
>>>>
>>>>>BC
>>>>>
>>>>>
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>>>>>
>>>>>
>>>>>
>>>>>
>>>>>          
>>>>>
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>>>>        
>>>>
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>>>      
>>>
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>>    
>>
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