I am using the HPI, i don't know about the JTAG port...Actually i am
using a
Parallel port controller built on the DSK and through this PPC all
communications occur with the HPI, there is a DLL called evmdsk54x.dll
provided
from texax, it contains functions that can be used to read/write to the DSP
memory, different HPI registers...etc
I am using this DLL to read/write to the DSP memory, when the DSP is halted
it
is just fine, otherwise problems occur...
I don't have access to the bare pins of the DSP since it is surface mounted
on
the DSK, so i cannot adjust the strobe signals, neither i have access to the
HCNTL pin,
for example i am using a function called evmdsk54x_hpi_read() to read from
the
DSP memory, this function takes as parameters a memory location from which i
want to read, a buffer to put the read data into and a HANDLE to the DSK,
which
is aquired by calling another function called evmdsk54x_open(), what i want
to
say is that i am doing the communication from a higher level, I hope u have
done
this before because i am realy stuck...I don't insist on continuing with
this
dll, it is just that i don't know what the other way is, if there is
another
way.
thanks for the help and waiting from u.
>Date: Thu, 08 Jun 2000 13:25:54 -0400
>From: Yi Li <>
>To: Mohamed Montasser <>
>CC:
>Subject: Re: [c54x] Still having problem with streaming data
>
>It's a little bit confusing -- are you using JTAG port to access DSP
memory or
using HPI?
>I'm not familiar with the former, I can not
help you in that case. If you are
"streaming data
>from host to taget using HPI", you must
provide correct data strobes and chip
selection
>signals as defined in Chapter 8 of 'CPU and
Peripherals' (Reference Set, Vol
1). The host
>can select to modify HPIC or HPIA by setting
HCNTL[1:0].
>
>liyi
>
>Mohamed Montasser wrote:
>
>> thank u for your help, I realy need it.
>> I am using the c5402 DSK, well i checked the HPIENA bit and i found
that it
is alreardy set to 1, I checked it be checking Data memory location
002Ch, the
data their was 0088h, which means the both the HINT and HPIENA are both set
to
1.
>> I don't know how the HPIA and HPID can be
configured correctly, all i know is
that they are not accessible from the DSP, only from the Host.
>>
>> to make my question complete, I'm trying to read/write from/to the
DSP memory
from a C program developed with Visual Studio in an intel machine, this
program
uses the evmdsk54x.dll to do this communication.
>>
>> thanks for the help.
>>
>> >Date: Thu, 08 Jun 2000 09:43:13 -0400
>> >From: Yi Li <>
>> >To: Mohamed Montasser <>
>> >Subject: Re: [c54x] streaming data from host to target using HPI
>> >
>> >Which DSP are you using? I'm using C5402. It should be no
problem to
>> >access DSP memory through HPI, whether DSP is running or not. Make
sure
>> >you have enabled HPI by pull the HPIENA to high, and provided
correct
>> >data strobes. One problem might be you did not config the HPIC
& HPIA
>> >registers correctly. You can verify this by reading the HPIA.
>> >
>> >Good Luck
>> >liyi
>> >
>> >Mohamed Montasser wrote:
>> >
>> >> hello all,
>> >>
>> >> I was intending to stream data from the PC to the target,
shall i do
>> >> this while the DSP is halted, or can it be done while the DSP
is
>> >> running.
>> >>
>> >> What happened to me is that the Code Composer Studio starts to
give me
>> >>
>> >> error messages about target time out when i tried to read or
write to
>> >> the DSP
>> >> memory from the host while the DSP is running...this is very
critical
>> >> for the project i'm currently working in, Please help me
as quick as
>> >> possible, it's realy urgent.
>> >> thanks.
>> >> bye.
>> >>
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