Hello,
I have a home-made bootloader on a lpc2378 that upgrade the firmware from a SD card. It works well except there's some troubles that appears when the application is launched.
The interrupt vectors seem to be well remapped to RAM, since the software part that used interrupts are OK. But , I have trouble with the UART for example : no or random characters are sent. I seems like there's troubles with the clock settings.
Is there particular points to consider when you set the clock controller twice ? (at the boot time and in the startup of the application)
Thanks in advance !
Thanks for the tips. After some debug, the clock is not the source of the trouble but the UART is !
the sendchar-) function used is not under interrupt but use a flag that wait for a bit . And that flag is never set ... In fact, when the bootloader start , it sets the UART1, does it job and when the application is launched the UART1 is re-configured. And it's here there's something wrong . I have to do a particular process to deactivate the UART1 in the bootloader before launching the app. But I realla don't know why and how :)
good work. I had a feeling it was not the clock...