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# 1   2011-06-10 10:06:31 IAR JTAG/JTRACE STM32F103XE Error TDO is ocstant High

valeriogiampa
New member
Registered: 2011-02-10
Posts: 3

IAR JTAG/JTRACE STM32F103XE Error TDO is ocstant High

I have developed an interface for IAR jtag/jtrace to an SBPT2500C2.AT board with integrated STM32F103XE Microcontroller.
The schematic interface from Jtag to SBPT Board is based on the interface schematic of the IAR STM32-SK board (pull-up resistor for TRST, TDI, TMS, TCK, TDO - Series Resistor and free line for other pin).
The connections of the jtag with SBPT module across the interface circuit are correct.
In the active project of IAR EWARM, I have selected the debugger driver option to Jlink/Jtrace; The Jtag/Jlink options are selected by defoult to JTAG, Auto Speed, Normal Reset).
When I start the Download and Debug process, I see this session log:
====
Fri Jun 10 11:51:51 2011: JLINK command: ProjectFile = C:\Firmware\app_BT22r4.jlink, return = 0
Fri Jun 10 11:51:51 2011: JLINK command: device = STM32F10xxE, return = 0
Fri Jun 10 11:51:51 2011: DLL version: V4.20m, compiled Oct 28 2010 09:07:34
Fri Jun 10 11:51:51 2011: Firmware: J-Trace ARM Rev.1 compiled Sep  5 2007 06:57:41
Fri Jun 10 11:51:51 2011: JTAG speed is initially set to: 32 kHz
Fri Jun 10 11:51:51 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:51 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:51 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:51 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:51 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:51 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:51 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:51 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:51 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:51 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:51 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:52 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:52 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:52 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:52 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:52 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:52 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:52 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:52 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:52 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:52 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:52 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:52 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:52 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:52 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:52 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:52 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:52 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:52 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:52 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:52 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:52 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:52 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:52 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:52 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:52 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:52 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:52 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:52 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:52 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:52 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:53 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:53 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:53 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:53 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:53 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:53 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:53 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:53 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:53 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:53 2011: Could not measure total IR len. TDO is constant high.
Fri Jun 10 11:51:57 2011: Fatal error: Failed to read CPUID for Cortex device   Session aborted!
Fri Jun 10 11:51:57 2011: Failed to load debugee: C:\Firmware\Exe\app.out
====
The Power Supply applied at the circuit is finded from Jlink interface (value about 3.55v).
What Can I do?

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# 2   2011-08-04 09:25:35 IAR JTAG/JTRACE STM32F103XE Error TDO is ocstant High

pascal697
Member
Registered: 2011-03-23
Posts: 16

Re: IAR JTAG/JTRACE STM32F103XE Error TDO is ocstant High

Hello,

Did you solve your problem ?
In my experience, JTAG interfaces always need an oscilloscope debug phase to ensure signals meet JTAG signal integrity requirements.

Regards.

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