I am designing a board around LPC51U68. When I put the chip in MSC USB ISP I can see the device on my PC and I can see the firmware.bin file on it. So far so good.
I noticed that the size of the firmware.bin file on the device is 260KB. I also noticed a bit too late that the bin file I generated from MCUXpresso IDE (using the Create binary on the project axf file), only was about 7KB.
I deleted the firmware.bin file on the device (LPC51U68) and I renamed my smaller bin file to firmeware.bin and copied it to the device(LPC51U68).
I proceeded to set the chip to boot from flash to see if my application software did what I wanted, it did not so I needed to create a new version. But when I switched back to MSC USB ISP, the device will no longer show up on my PC at all. Is the chip bricked?
I think I need some clarification on how to generate the correct bin file (from MCUXpresso IDE?) and how to recover from a corrupted firmware.bin file on the chip.
All help is appreciated.
My board is very simple at the moment, I only have:
*)UART to FTDI USB (PIO0_0 and PIO0_1)
*)Jumpers for ISP Boot pins.
I only use internal clocks on chip.
My board will boot up and show the CRP DISABLD device on my PC (when I boot from USB/MSC).
I tried the hello world example in the LPC51U68 SDK, and I changed SDK Debug consle to UART console. I downloaded the app, and set the MCU to boot from flash. I did not get any printouts on the UART (I use TeraTerm on PC setup according to NXP guide with FTDI TTL-232R cable).
And then when I switch back to boot from USB it will no longer show the CRP DISABLD device. The hello world example is really small so I am not sure what I am doing wrong. As long as the hello world uses internal clocks then there should be no problems with my board.
/* Init board hardware. */
/* attach 12 MHz clock to FLEXCOMM0 (debug console) */
ch = GETCHAR();
So in conclusion I have two problems:
1) USB Device no longer shows up after change of firmware.
2) No printouts on the UART to FTDI USB.
How about the method Con Verse mentioned?
If it even can't enter into ISP mode, I think maybe your chip broken.
I managed to solve the problem, it was related to the boot pins not beeing correctly grounded, and was read as "one" and not "zero".
Do I need to add code for USB in my application to make the MSC USB ISP boot process work?
Hello Christian Grosse,
- In normal way, after copy .bin file into device, just re-power board, it can work well, I test on my side.
- "how to generate the correct bin file (from MCUXpresso IDE?)"
-> Config Debug Console to "UART console", build, then refer to the below screenshot to generate .bin file:
-" How to recover from a corrupted firmware.bin file on the chip."
-> Do you mean your chip now can't run into USB Mass storage mode ? Can't show "CRP DISABLD" device?
Yes, I no longer get "CRP DISABLD" device on my PC.
When I built my project in MCUXpresso IDE, I did not Configure Debug Console to "UART console".
My application size was only 7k, while the firmware-bin on device was 260k. Do I need to add code to my application to make USB MSC BOOT work?
You do not add any code to make USB boot work - it is embedded i the on-chip ROM.
However, you may need to regain debug access - see https://community.nxp.com/thread/389112