STM CircleOS forum / no cortex-m device found in the jtag chain

aod · 2012-08-21 04:32:58

hello everybody
i am working with stm32f103rbt6 and i am using JLINK for debugging . when i start to debug a program by chip , the KEIL compiler shows an error :
"no cortex-m device found in the jtag chain
please check the jtag cable and the connected device"
can anybody help me ?

aod · 2012-08-29 04:46:10

i use jlink and my board is based on stm32h103 from OLIMEX. i convert 20pin connector of JTAG to 7pin connector in my board . the JTAG needs TRST , TDI , TDO , TMS , TCK and RST pins in every microcontroller that we want to debug and program it. i use a 7pin connector that is composed of : TRST , TDI , TDO , TMS , TCK , VCC and GND. i remove the RST pin because it is unused in stm32h103 board from OLIMEX. i use 10k ohm resistros to pull up and pull down pins based on OLIMEX board.
i use an interface borad to convert 20pin of JTAG to 7pin of my board.
i use KEIL for IDE and when i want to debug my board by it , a dialog box appears and displays:
"no cortex-m device found in the jtag chain.
please check the jtag cable and the connected device"
and in the below , KEIL displays :
"JLink Info: Could not measure total IR len. TDO is constant high.
**JLink Warning: No matching core found. Selecting default core (ARM7).
* JLink Info: Could not measure total IR len. TDO is constant high.
***JLink Error: Could not find supported CPU core on JTAG chain"
i put the images and documents in the link below :
http://www.4shared.com/rar/8Vrdrz35/doc1.html

aod · 2012-09-02 12:15:30

my problem is solved.
the problem was unconnected VDDA to 3.3v

# 1 2012-08-21 04:32:58 no cortex-m device found in the jtag chain

no cortex-m device found in the jtag chain

# 2 2012-08-29 04:46:10 no cortex-m device found in the jtag chain

Re: no cortex-m device found in the jtag chain

# 3 2012-09-02 12:15:30 no cortex-m device found in the jtag chain

Re: no cortex-m device found in the jtag chain

Board footer