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Tool/software: Code Composer Studio
Hello,
I am designing my own PCB with CC1350 and I am planning to use segger j-link emulator as the debugger. I am testing its usage and functionality using CC1350 LP and CCS IDE.
I have wired the JTAG connector to appropriate pins on the LP since i dont have any kind of converter to put between the 10-pin connector on-board and the 20 pin connector that came with the emulator.
My questions -
1. What should be the jumper position for VSENSE? I tried placing it on XDS, external power and completely removing it; all 3 positions gave the same error.
2. What should I do with the pins on the 20 pin connector that I am not using (for example, TRST, RTCK and VCC_Optional)
3. I followed the instruction given here -
And I am getting errors - firstly it shows in CCS debugger mode that Segger J_Link Emulator is Disconnected: Unknow
When I try to connect using JLink Commander, it shows me similar error saying cannot connect to the device.
Please give some solution for this issue.
On a completely different note,
4. I am interested in knowing how did you select the value for capacitor C15 = 100pF on the CC1350 LP. This capacitor serves as kind of a switch between on board antenna and the JSC connector for external antenna.
Hi,
1. The answer to this question depends on how you are powering the board, which can be in any way if you are using an external JTAG debugger. Page 3 of the schematics says:
2. nTRST should be connected to the RESET pin on the launchpad, as this may be required to properly bring the JTAG state machine to a known status before any connection attempts. RTCK and the 5V supply pins can be left unconnected. I am using this pinout as a base for my assertions.
3. What is exactly the error CCS is showing? If the issue is between the host and the Debug Probe, it should show an error message that says "No emulators connected via USB. Do you want to connect to a J-Link via TCP/IP instead ?"
Otherwise, the console would show a range of errors - the most common being:
Console said:CORTEX_M4_0: Error: Stat [ JLINKARM_IsHalted() call ] failed!
CORTEX_M4_0: Unable to determine target status after 20 attempts
That would match what the Jlink commander error message indicates: the error is happening between the probe and the device, which is certainly influenced by the discussion above. I would check the details above and retry.
4. I don't know the answer to this question. I would post this to the device forum.
Hope this helps,
Rafael
