I are puzzled about LPC2300 bootloader,please give me some guidance, thanks!
1) bootloader in lpc2368 flash, Is it possible be earsed by Uvision3 IDE or the other flash utility? 2) in case the bootloader is earsed, how to restore it, 3) in uVision3 IDE, I selected Flash | Erase after this operating, i can't erase or programming the flash anymore, can i assert the bootloader in this LPC2368 is destroyed?
Well, the reason for my question is the following: A few weeks ago I programmed 15 boards (LPC2368) using FlashMagic and everything went well. Now, on another 25 boards 10 out of them are not able to program this way, but they are programmable using ULINK2. Two persons had doublechecked all parts and wiring and they could not find any error. After replacing the cpu on one of the boards, FlashMagic was working. Now it looks like there are any flaw cpus. BTW all of them have the same date code. Is there anybody with the same experiance and/or any solution?
I have a problem where some boards with lpc2366 only program at 19200 baud.
Some support up to 57600baud and some 115200baud. Perfect signals, same PC, same program...
The only thing that I can think about that differs is the internal RC oscillator in the processor. But the transmissions looks ok.
the internal RC oscillator
Well, that would easily explain any such failures. High RS232 signal bitrates and RC oscillators just don't mix.