topic Re: Occasional Programming failure in lpc54606 using lpc link2 in LPC Microcontrollers

Occasional Programming failure in lpc54606 using lpc link2

hemanthvasista — Fri, 12 Feb 2021 16:22:37 GMT

Hello

I am using LPC54606 controller for project in custom board.

I am using LPC Link2 to program it using SWD.

Occasionally I have observed that even though programming is successful, the flash doesn't seems to be programed with required binary.

How do I ensure that programming has actually happened? Because I see no error message while programming using LPC Link2 in MCUexpresso but the binary in flash in not the intended.

When I try programming via USB ISP, I don't see the issue.

How do I ensure right binary is programed using LPC Link2?

Re: Occasional Programming failure in lpc54606 using lpc link2

converse — Fri, 12 Feb 2021 17:18:17 GMT

I'd suggest checking your power supply - especially when programming with LPC-Link2.

Re: Occasional Programming failure in lpc54606 using lpc link2

hemanthvasista — Sat, 13 Feb 2021 03:51:30 GMT

The target is powered by LPC Link2.

Re: Occasional Programming failure in lpc54606 using lpc link2

converse — Sat, 13 Feb 2021 08:08:56 GMT

Use an external power supply. While plc-link2 can supply enough power to run the device it often cannot to flash it, which takes significantly more power - as I think you have found out.

Re: Occasional Programming failure in lpc54606 using lpc link2

frank_m — Mon, 15 Feb 2021 06:56:18 GMT

I agree, the power supply is the first suspect here.

Besides of stability and current limit, the buffer caps might be insufficient (too few, too far placed from the MCU, wrong types).

Re: Occasional Programming failure in lpc54606 using lpc link2

hemanthvasista — Mon, 15 Feb 2021 11:07:00 GMT

With just LPC Link-2 (no external power) if use the "Debug as MCUexpresso IDE Linkserver" it is able to program correctly.

But if I use GUI Flash Tool there are programming failure even when powered externally.

Re: Occasional Programming failure in lpc54606 using lpc link2

frank_m — Mon, 15 Feb 2021 11:32:52 GMT

The length of the JTAG/SWD wiring could be a problem as well.

Most Flash tools allow to config the bitrate in the setup, you could try to reduce it.

Re: Occasional Programming failure in lpc54606 using lpc link2

hemanthvasista — Mon, 15 Feb 2021 12:12:29 GMT

@frank_m

With just LPC Link-2 (no external power) if use the "Debug as MCUexpresso IDE Linkserver" it is able to program correctly.

But if I use GUI Flash Tool there are programming failure even when powered externally.

Re: Occasional Programming failure in lpc54606 using lpc link2

frank_m — Mon, 15 Feb 2021 12:59:23 GMT

Bit rates might differ between both tools.

Re: Occasional Programming failure in lpc54606 using lpc link2

converse — Mon, 15 Feb 2021 14:46:09 GMT

I would still strongly suggest powering your board with an external power supply. It really is marginal when powering through LPC-Link2. The GUI flash programmer and the debugger both use identical methods to program the device - in fact it is the same executable in both methods, so it should not make any difference which programming method you use.

@frank_m suggestion about JTAG length maybe true, but I don't know of any convenient method to change the bitrate with MCUXpresso - I vaguely recall somebody mentioning that it was self-adaptive, but I could be mis-remembering.

Re: Occasional Programming failure in lpc54606 using lpc link2

frank_m — Mon, 15 Feb 2021 15:52:31 GMT

>... but I don't know of any convenient method to change the bitrate with MCUXpresso ...

Me neither. My favourite toolchain (Crossworks) made project-specific debug adapter settings easy, including JTAG/SWD baudrates.

I find already the debugging interface cumbersome, especially the way to start a debug. I know, it's Eclipse standard. No big fan of Eclipse at all.

Taking a look at the MCUXpresso project debug settings, there is something :

Might be worth a try.

I'm havinf no problems with my LPCXpressor board ...

Re: Occasional Programming failure in lpc54606 using lpc link2

hemanthvasista — Tue, 16 Feb 2021 03:25:12 GMT

@converse

I could see programming failures when done by GUI Programmer(with & without external power)