Thank You! The part command worked!I managed to get the bus working with this
sequence:
detect
part 0
instruction length 5
register BSR 1
register BR 1
register DIR 32
register EJIMPCODE 32
register EJADDRESS 32
register EJDATA 32
register EJCONTROL 32
register EJALL 96
register EJFASTDATA 33
instruction BYPASS 11111 BR
instruction SAMPLE/PRELOAD 00010 BSR
instruction IDCODE 00001 DIR
instruction EJTAG_IMPCODE 00011 EJIMPCODE
instruction EJTAG_ADDRESS 01000 EJADDRESS
instruction EJTAG_DATA 01001 EJDATA
instruction EJTAG_CONTROL 01010 EJCONTROL
instruction EJTAG_ALL 01011 EJALL
instruction EJTAGBOOT 01100 BR
instruction NORMALBOOT 01101 BR
instruction EJTAG_FASTDATA 01110 EJFASTDATA
instruction TCBCONTROLA 10000 BR
instruction TCBCONTROLB 10001 BR
instruction TCBDATA 10010 BR
part 1
instruction length 5
register BSR 1
register BR 1
register DIR 32
register EJIMPCODE 32
register EJADDRESS 32
register EJDATA 32
register EJCONTROL 32
register EJALL 96
register EJFASTDATA 33
instruction BYPASS 11111 BR
instruction SAMPLE/PRELOAD 00010 BSR
instruction IDCODE 00001 DIR
instruction EJTAG_IMPCODE 00011 EJIMPCODE
instruction EJTAG_ADDRESS 01000 EJADDRESS
instruction EJTAG_DATA 01001 EJDATA
instruction EJTAG_CONTROL 01010 EJCONTROL
instruction EJTAG_ALL 01011 EJALL
instruction EJTAGBOOT 01100 BR
instruction NORMALBOOT 01101 BR
instruction EJTAG_FASTDATA 01110 EJFASTDATA
instruction TCBCONTROLA 10000 BR
instruction TCBCONTROLB 10001 BR
instruction TCBDATA 10010 BR
part 1
initbus ejtag
part 0
initbus ejtag
part 1
initbus ejtag
output after the last initbus ejtag:
ImpCode=01100000010000010100000000000000 60414000
EJTAG version: 3.1
EJTAG Implementation flags: R4k ASID_8 MIPS16 NoDMA MIPS32
Processor entered Debug Mode.
Initialized bus 2, active bus 0
jtag>
jtag> print
No. Manufacturer Part Stepping Instruction
Register
-------------------------------------------------------------------------------------------------------------------
1 EJTAG_DATA
EJDATA
Active bus:
*0: EJTAG compatible bus driver via PrAcc (JTAG part No. 1)
start: 0x00000000, length: 0x20000000, data width: 8 bit
start: 0x20000000, length: 0x20000000, data width: 16 bit
start: 0x40000000, length: 0x20000000, data width: 32 bit
jtag>
From: Kolja Waschk <[email protected]>
To: [email protected]
Sent: Tuesday, February 14, 2017 12:34 PM
Subject: Re: [UrJTAG-dev] MIPS 24kec set registers etc.
> the device. How can I use this output to set the JTAG declarations like
> EJCONTROL?
> UrJTAG ouptut (OpenOCD shows IR length 5):
> IR length: 10
> Chain length: 2
So it is probably 2 cores x 5 bit. After manually defining "instruction
length 5" and part number ("part 0" or "part 1") you should be able to
get further.
https://www.linux-mips.org/wiki/JTAG
Regards,
Kolja
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