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Can you please PM me the S/N of your J-Trace unit?
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Not being able to specify the SWO speed is bad… Having it on “max possible” is OK but not being able to change that setting is a bad thing because different models have different max. speeds May be worth opening a ticket at Renesas for this because it should not be a big change for them (nothing would change for 99% of their users) But 67 MHz SWO speed has a high probability of being problematic. Many I/Os are not capable of speeds beyond 50 MHz (if that high at all). You can easily mess things …
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Hi Steven, I see that you have been in touch with Richard W. at TI. A very capable guy… Pretty sure he can help you out. As J-Link’s Cortex-M4 support is generally working and we are not talking about an issue with our flash algo etc. but a connect works and a simple halt command is not accepted / acknowleged by the core, it can only be something chip-specific like the M4 being held in reset. My suggestion is to get one of TI’s example projects up and running that blinks an LED or so on the M4. …
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I doubt that it is a problem with the ULTRA+ firmware but more a setup issue. Probably you have set the SWO speed to “max” and the ULTRA+ (which is capable to handle up to 100 MHz SWO speeds) leads to settings that exceed the max. speed of the MCU’s I/Os. What SWO speed do you use? Did you check if selecting a fixed speed of 1 or 4 MHz for SWO works with both probes?
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Hi Pedro, What unit do you use? (Can you please PM me the S/N?) There is currently no official way to do this via J-Link Commander but we should be able to add something like that. Way easier than adding a whole command line handling to a heavy, almost GUI-only utility like the Configurator. BR Alex
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Hi Steve, Sounds a bit like the M4 is clocked, so the AHB-AP debug domain is accessible but the core itself is still held in reset. This would explain why it is not responding to halt requests etc. Is that possible in your case?
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Hi, Why do you think you need the manual update? What is the problem with the regular update path? We manual update is more something like a last resort for units that have a correctly signed etc. but faulty functioning firmware that can no longer be reached via USB or IP. Something that has not happened in years, so the manual update was not needed for a while… BR Alex
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Not sure if you understood Fabian’s post… “Sinply pulling nReset” is something that can disturb a debug (and so RTT) session. Pulling the reset pin may also reset the debug interface and cause a connection loss. Even if it does not, it may cause memory access errors or garbage being read from the buffers (e.g. the startup code re-initializes the control block to 0 while J-Trace is currently evaluating the buffer positions). Such error cases may lead to an RTT “safety shutdown” where the buffer i…
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I do not specifically know the KV30 into much detail but have worked on many of the various Kinetis flash algorithms for J-Link. For all Kinetis I have encountered, the debug interface does not provide a way to get the backdoor key into the chip. The manual said that the user is responsible to implement a way of receiving the key (e.g. via UART, SPI, …) and then the user application must copy it into the backdoor key comparison registers, to actually trigfer the temporary unlock. If the applicat…
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Are you serious? You are wondering that something prevents your target from entering low power modes after you KILL GDBServer and so do not even give it a chance to perform a clean shutdown & clearing debug bits that very possibly may inhibit low power modes? What the… How about this? wiki.segger.com/J-Link_GDB_Server#-singlerun
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The EDU mini is not guaranteed to work with 1.8V targets, only with 3.3V ones. BR Alex
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Sounds strange... Is it possible that the USB hub, the J-Links are connected to, is not powered externally or its external power supply is broken? This would cause the hub and all J-Links connected to it to be fed from the USB cable that goes to your PC. Maybe it is just too much for that port and it cannot deliver sufficient current, so USB works unstable then? I still not see why it should affect your screen in any way but it would explain the "ding" which indicates USB detach + reattach/re-en…
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Agree or not, your choice. Fact is: All J-Link flash loaders are designed to work with the natively memory-mapped space of the chip. For the RP2040 this is 16 MB, according to the datasheet. This means, J-Link will be able to program & verify 16 MB of QSPI reliably. Moving the 16 MB “window” to another portion of the flash (so effectively configure the QSPI controller to use fixed high-bits != 0 during memory mapped accesses) is not supported and there is no plan to do so. (Even though it would …
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Hi, If the memory-mapped region supports max. 16 MB, this is what your flash loader does support as well. All our flash loaders support max. what is mapped in the address space of the MCU. So what you describe is not a bug and no, we have not “misinterpreted” the datasheet. If flashing beyond 16 MB on this MCU somewhat / half-way works, consider yourself lucky but don’t rely on it. If you want to have support for space beyond that (which is not XIP and therefore not “directly” debuggable anyhow)…