I cannot make the J-link Segger connect to a microcontroller (Vorago) that uses the Cortex-M4.
Details about microcontroller’s setup:
Pins: 2, and all add pins are equal to VTRef=3.3V(pin 1).
Pin 7: 2.8 V.
Pin 19 is the target voltage supply pin, which reads 3.0V without the J-link connected, and 5V when the J-link is connected (read from JTAG/VDD pin on the board).
I attempt to communicate through the J-Link commander , the J-link RTT, and through Keil MDK.
This is the information of the J-link:
DLL version V7.56b
Hardware version: V11.00
S/N:261014505
**The J-link commander is able to sense the VTref of the microcontroller as 3.3 V, and I can program the supply voltage of the
the J-link using J-link commander. (Thus the J-link EDU is fully functional), but it still cannot
connect to the target.
*** For the J-link RTT: TheRTT control block is correct in accordance to the *.map output file for the microcontroller.
Different speed frequencies were also used below and above the J-Link's specifications, and the connection still failed.
** No previous source code has been loaded into the device.
I look forward to hear troubleshooting tips, beyond "Check the connection," because as stated above that was already followed.
thank you in advance.
Details about microcontroller’s setup:
- The power supplies (3.3 V, 1.5 V, VRef (3.3V), 5V) on the board all read the expected values, after using a volt meter
- The J-link was programmed (through J-link commander) with the “power on” command to output 5 V on pin 19. The 5V can be read on the target’s (JTAG/VDD) pin as 5V.
- Pin 19 on the J-link was measured with an oscilloscope and it does output a 5V value as expected.
- The J-link is directly connected to the target through a ribbon cable provided by Segger.
- The LED that indicates that the target in ON is “ON.”
- Already followed the troubleshooting instructions from chapter 19 of the J-link/J-Trace (UM08001) & Keil MDK.
- Followed the power supply instructions and proper jumper connections from the manufacturer of the microcontroller
- The JTAG pins (on the target device) output the expected voltage relative to the VTRef=3.3 V (on pin 1):
Pins: 2, and all add pins are equal to VTRef=3.3V(pin 1).
Pin 7: 2.8 V.
Pin 19 is the target voltage supply pin, which reads 3.0V without the J-link connected, and 5V when the J-link is connected (read from JTAG/VDD pin on the board).
I attempt to communicate through the J-Link commander , the J-link RTT, and through Keil MDK.
This is the information of the J-link:
DLL version V7.56b
Hardware version: V11.00
S/N:261014505
**The J-link commander is able to sense the VTref of the microcontroller as 3.3 V, and I can program the supply voltage of the
the J-link using J-link commander. (Thus the J-link EDU is fully functional), but it still cannot
connect to the target.
*** For the J-link RTT: TheRTT control block is correct in accordance to the *.map output file for the microcontroller.
Different speed frequencies were also used below and above the J-Link's specifications, and the connection still failed.
** No previous source code has been loaded into the device.
I look forward to hear troubleshooting tips, beyond "Check the connection," because as stated above that was already followed.
thank you in advance.